Link.Assistant.Router

A Rust-based API gateway that proxies Anthropic (Claude) APIs through a Claude MAX OAuth session, providing multi-tenant access via custom-issued tokens.

Overview

Link.Assistant.Router is a transparent proxy that sits between API clients (such as Claude Code) and the Anthropic API. It is the OpenRouter-equivalent for Claude MAX accounts: every feature found in the community Claude proxies is available behind a single configurable surface.

Proxies all Anthropic API requests transparently, including SSE/streaming responses
Supports Claude MAX (OAuth) by reading Claude Code session credentials
Vendor subscriptions — the default UPSTREAM_PROVIDER=auto discovers healthy Claude, Codex, Gemini, and Qwen CLI credentials, exposes their model union, and routes each model to its owning subscription; an explicit provider value pins all traffic
OpenAI-compatible endpoints — /v1/chat/completions, /v1/responses, /v1/models translate to Anthropic or forward to a configured OpenAI-compatible provider
Optional Gonka upstream — UPSTREAM_PROVIDER=gonka forwards OpenAI-compatible routes to Gonka instead of translating them to Anthropic
Optional Crater ForgeFed upstream — UPSTREAM_PROVIDER=crater turns OpenAI chat requests into ForgeFed Offer{Ticket} tasks and waits for resolved task results
Optional LiteLLM/OpenAI-compatible upstream — UPSTREAM_PROVIDER=openai-compatible routes OpenAI SDK traffic to a stored provider such as LiteLLM
Multi-account routing — pool any number of Claude, Codex, Gemini, or Qwen subscriptions; session affinity, strict token pins, round-robin / fill-first / least-used selection, request caps, and Retry-After-aware cooldowns
Issues custom la_sk_... JWT tokens with expiration and revocation for multi-tenant access
Persistent token store — text (Lino) and binary backends, both on by default; tokens survive restarts
Live observability — Prometheus /metrics, JSON /v1/usage, per-account health at /v1/accounts
lino-arguments + .lenv — every flag has an env-var alias and an optional .lenv file fallback
First-class CLI — serve, token/provider/account management, clients list|setup|show|remove|doctor, and deployment diagnostics
Replaces custom tokens with real OAuth credentials internally, so the OAuth token is never exposed to clients
Runs as a single Docker container for easy deployment

Every feature is configurable — conflicting design choices in upstream community proxies become toggles (--routing-mode, --storage-policy, --disable-openai-api, --disable-anthropic-api, --disable-metrics, --experimental-compatibility).

Architecture

Client (Claude Code / API user)
   |
   |  Authorization: Bearer la_sk_...
   v
Link.Assistant.Router (Rust / axum)
   |
   |  Authorization: Bearer <real OAuth token>
   v
Anthropic API (api.anthropic.com)

When UPSTREAM_PROVIDER=gonka, clients still authenticate to the router with Authorization: Bearer la_sk_..., but upstream OpenAI-compatible requests are sent to Gonka with Gonka signing headers instead of the client token. This project remains Link.Assistant.Router; Gonka is an optional backend.

When UPSTREAM_PROVIDER=openai-compatible, clients still authenticate to the router with Authorization: Bearer la_sk_... or x-api-key: la_sk_.... The router forwards OpenAI-compatible requests to the configured provider, such as a LiteLLM proxy, and substitutes only the upstream provider key inside the router.

When UPSTREAM_PROVIDER=crater, /v1/chat/completions accepts normal OpenAI chat requests, delivers a ForgeFed Offer containing a Ticket to CRATER_FORGEFED_INBOX, reads Accept.result, polls that task URI until isResolved:true, and maps the resolved content back to OpenAI JSON or SSE.

Vendor subscriptions (Codex, Gemini, Qwen)

By default, leave UPSTREAM_PROVIDER=auto: the router discovers every healthy vendor credential, returns their union from /v1/models, and sends each model to its owning subscription. Set a concrete value to pin a deployment to one provider. Clients still authenticate with their la_sk_... token; the router supplies the selected vendor OAuth token.

Provider	`UPSTREAM_PROVIDER` (aliases)	Credentials (read-only)	Upstream
Claude	`anthropic`	`~/.claude/.credentials.json`	`api.anthropic.com`
Codex / ChatGPT	`codex` (`chatgpt`, `openai-codex`)	`~/.codex/auth.json`	ChatGPT backend Responses API
Gemini	`gemini` (`google`, `code-assist`)	`~/.gemini/oauth_creds.json`	Code Assist `generateContent`
Qwen	`qwen` (`qwen-code`, `dashscope`)	`~/.qwen/oauth_creds.json`	DashScope OpenAI-compatible

The credential files are produced by each vendor's own CLI (run its login once); the router only reads them. Expired tokens are refreshed in memory using the vendor's public OAuth client — the files on disk are never modified and secrets are never logged. /v1/chat/completions and /v1/responses are translated to each backend's dialect (Codex uses the OpenAI Responses API; Gemini uses the Code Assist envelope with synthesized SSE for streaming; Qwen is OpenAI-compatible). Run router doctor to verify each credential file is present and its token valid.

To pool subscriptions, set ADDITIONAL_ACCOUNT_DIRS to vendor-specific credential homes. The active UPSTREAM_PROVIDER determines how every directory is parsed. New sessions use ACCOUNT_ROUTING_STRATEGY; a session remains on its chosen account for SESSION_AFFINITY_TTL_SECS, and an la_sk_... token issued with an account claim is a strict pin. Automatic selection skips accounts whose configured ACCOUNT_REQUEST_LIMITS cap is spent or whose upstream returned HTTP 429. Pinned and session-bound requests fail instead of silently changing identity.

Quick Start

Prerequisites

Rust 1.70+ (for building from source)
Docker (for containerized deployment)
A Claude MAX subscription with an active Claude Code OAuth session

1. Build from source

git clone https://github.com/link-assistant/router.git
cd router
cargo build --release

The binary will be at target/release/link-assistant-router.

2. Set up Claude Code credentials

The router reads OAuth credentials from the Claude Code home directory. By default, it looks in ~/.claude for credential files. Make sure you have an active Claude Code session:

# Log in with Claude Code (this creates the session files)
claude

The router searches these files in order:

credentials.json
.credentials.json
auth.json
oauth.json
config.json

Two on-disk layouts are supported automatically:

Nested (the format real Claude Code writes to ~/.claude/.credentials.json):

{
  "claudeAiOauth": {
    "accessToken": "sk-ant-oat01-...",
    "refreshToken": "sk-ant-ort01-...",
    "expiresAt": 1781050618000,
    "scopes": ["user:inference", "user:profile"],
    "subscriptionType": "max"
  }
}

Flat (convenient for tests and minimal setups):
```
{ "accessToken": "sk-ant-oat01-..." }
```

For the nested layout the router reads accessToken and expiresAt from inside claudeAiOauth. For the flat layout it reads accessToken (or access_token, oauthToken, oauth_token) from the top level of the first file found. The file is only ever read — the router never writes back to or deletes your credential files.

3. Start the router

# Required: set the JWT signing secret
export TOKEN_SECRET=your-secure-secret-here

# Optional: customize port (default: 8080)
export ROUTER_PORT=8080

# Optional: set Claude Code home directory (default: ~/.claude)
export CLAUDE_CODE_HOME=~/.claude

# Optional: override upstream URL (default: https://api.anthropic.com)
export UPSTREAM_BASE_URL=https://api.anthropic.com

# Start the router
./target/release/link-assistant-router

You should see:

INFO Link.Assistant.Router v0.2.0
INFO Upstream: https://api.anthropic.com
INFO Claude Code home: /home/user/.claude
INFO Listening on 0.0.0.0:8080

4. Issue a custom token

curl -s -X POST http://localhost:8080/api/tokens \
  -H "Content-Type: application/json" \
  -d '{"ttl_hours": 24, "label": "my-dev-token"}' | jq .

Response:

{
  "token": "la_sk_eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9...",
  "ttl_hours": 24,
  "label": "my-dev-token"
}

Save the token value for use in API requests.

5. Use the router as an Anthropic API proxy

# Use the custom token to make requests through the router
curl -s http://localhost:8080/api/latest/anthropic/v1/messages \
  -H "Authorization: Bearer la_sk_eyJ0eXAi..." \
  -H "Content-Type: application/json" \
  -H "anthropic-version: 2023-06-01" \
  -d '{
    "model": "claude-sonnet-4-20250514",
    "max_tokens": 100,
    "messages": [{"role": "user", "content": "Hello!"}]
  }' | jq .

The router will:

Validate the la_sk_... token
Replace it with the real OAuth token from the Claude Code session
Inject the upstream headers Claude MAX OAuth requires — anthropic-version (default 2023-06-01 when the client omits it) and the anthropic-beta: oauth-2025-04-20 flag (merged with any betas the client already sent)
Forward the request to https://api.anthropic.com/v1/messages
Stream the response back to the client

Because the router injects these headers itself, a client only needs to send the la_sk_... token — it never needs the real OAuth token, the OAuth beta flag, or even an anthropic-version header.

Use-case documentation

Each supported scenario has its own document under docs/use-cases/, so you can read only the one you need:

Document	Scenario
per-task-tokens.md	One `la_sk_…` token per task — audit, monitoring, security, isolation
audit-and-monitoring.md	Per-token counters in `/metrics` and `/v1/usage`, plus the JSONL audit log
claude-max-in-codex.md	A Claude MAX subscription inside Codex CLI and other OpenAI-dialect clients
chatgpt-in-claude-code.md	A ChatGPT/Qwen/Gemini/LiteLLM backend inside Claude Code and other Anthropic-dialect clients
cli-claude-code.md	Claude Code configuration
cli-codex.md	Codex CLI configuration
cli-qwen-code.md	Qwen Code configuration
cli-gemini-cli.md	Gemini CLI configuration
cli-opencode.md	opencode configuration
cli-grok-cli.md	Grok CLI configuration
cli-agent.md	Link.Assistant Agent configuration
cli-cursor.md	Cursor CLI — explicitly not supported, and why

Using with Claude Code

The primary use case is routing Claude Code through the proxy so multiple users can share a single Claude MAX subscription.

Step 1: Start the router (on the server/host machine)

export TOKEN_SECRET=your-secure-secret
./target/release/link-assistant-router

Step 2: Issue a token for each user

# Issue a token for user Alice
curl -s -X POST http://localhost:8080/api/tokens \
  -H "Content-Type: application/json" \
  -d '{"ttl_hours": 168, "label": "alice"}' | jq -r '.token'

# Issue a token for user Bob
curl -s -X POST http://localhost:8080/api/tokens \
  -H "Content-Type: application/json" \
  -d '{"ttl_hours": 168, "label": "bob"}' | jq -r '.token'

Step 3: Configure Claude Code to use the router (on each user's machine)

# Set the base URL to point to the router
export ANTHROPIC_BASE_URL=http://your-server:8080/api/latest/anthropic

# Set the custom token as the API key
export ANTHROPIC_API_KEY=la_sk_eyJ0eXAi...

# Run Claude Code normally — all requests go through the router
claude

Claude Code will work exactly as normal, with all requests transparently proxied through the router.

API Endpoints

Always available

Endpoint	Method	Description
`/health`	GET	Health check, returns `ok`
`/api/tokens`	POST	(admin) Issue a new custom token
`/api/tokens/list`	GET	(admin) List every persisted token
`/api/tokens/revoke`	POST	(admin) Revoke a token by id
`/api/tokens/rotate`	POST	(admin) Issue a replacement admin token and revoke the caller's own
`/api/providers`	GET/POST	(admin) List or upsert OpenAI-compatible upstream providers
`/api/providers/{name}`	GET/DELETE	(admin) Show or delete one provider

Login surface (`--disable-login-api` to opt out)

Authorizes a deployment that has no credential file — see docs/use-cases/remote-login.md. The optional provider request field selects claude (the backwards-compatible default) or codex. Claude drives the TUI /login flow and requests its full scope set; LOGIN_CLI_ARGS=setup-token explicitly selects the narrower user:inference flow. Codex defaults to its device-code flow, which needs no callback port or vendor CLI; its PKCE loopback flow remains available as a CLI fallback.

Endpoint	Method	Description
`/api/login`	POST	(admin) Start a login; optional body: `{"provider":"claude"
`/api/login/{id}`	GET	(admin) Status includes `awaiting_code` (Claude) or `awaiting_device` plus `user_code` (Codex)
`/api/login/{id}`	DELETE	(admin) Cancel a pending login and kill its process
`/api/login/{id}/code`	POST	(admin) Submit the code the human copied from the browser

For a foreground local login, use link-assistant-router auth claude or auth codex. Claude's --flow code stores its pending PKCE login for 15 minutes, so the code can be redeemed from a later process with auth claude --flow code --code <code>. auth status reports each provider credential as usable, expired, or absent. auth codex defaults to device authorization; --flow device or --flow loopback makes the choice explicit. Unsupported forced flows fail instead of falling back.

Admin UI surface (`--admin-port` to opt in)

Served on a separate listener that does not exist unless you give it a port, and on which every route but bootstrap and status requires the admin credential — see docs/use-cases/admin-ui.md.

Endpoint	Method	Description
`/api/admin/status`	GET	(open) Credential state: claimed, bootstrap open, provisioned by environment
`/api/admin/bootstrap`	POST	(open while unclaimed) Mint a candidate token; authorises nothing on its own
`/api/admin/bootstrap/confirm`	POST	Activate the candidate, authenticated with the candidate token itself
`/api/admin/rotate`	POST	(admin) Mint a replacement admin credential and retire the current one
`/api/admin/summary`	GET	(admin) Version, upstream, accounts and credential state
`/` and static assets	GET	The embedded React console

Chat admin channels (`TELEGRAM_BOT_TOKEN` / `VK_BOT_TOKEN` to opt in)

Optional Telegram and VK bots that administer the router from a private chat — they poll outward, so no inbound port is opened. They share the same system-wide admin claim as the web UI: one first admin per deployment, claimed in a browser or in a chat. See docs/use-cases/chat-admin-bots.md.

Env / flag	Description
`TELEGRAM_BOT_TOKEN` / `--telegram-bot-token`	Bot API token; present ⇒ the Telegram channel runs
`VK_BOT_TOKEN` / `--vk-bot-token`	VK community token (needs `VK_GROUP_ID`)
`VK_GROUP_ID` / `--vk-group-id`	VK community id the token belongs to
`CHAT_ADMIN_SECRET_TTL_SECS` / `--chat-admin-secret-ttl-secs`	Seconds before a message carrying a credential is deleted (default `120`)
`CHAT_ADMIN_RATE_LIMIT_PER_MINUTE` / `--chat-admin-rate-limit-per-minute`	Sensitive commands per user per minute (default `5`)

Anthropic surface (`--disable-anthropic-api` to opt out)

Endpoint	Method	Description
`/v1/messages`	POST	Anthropic Messages — preserves SSE streaming
`/v1/messages/count_tokens`	POST	Token-count helper
`/api/anthropic/v1/messages`	POST	Namespaced Anthropic Messages alias
`/api/anthropic/v1/messages/count_tokens`	POST	Namespaced token-count alias
`/invoke`	POST	Bedrock-format invoke
`/invoke-with-response-stream`	POST	Bedrock streaming invoke
`/api/latest/anthropic/*`	ANY	Legacy prefix; stripped and forwarded
`/:rawPredict`, `/:streamRawPredict`	POST	Vertex rawPredict pass-through

OpenAI surface (`--disable-openai-api` to opt out)

Endpoint	Method	Description
`/v1/chat/completions`	POST	Chat Completions, translated to Anthropic Messages, forwarded to the selected OpenAI-compatible provider, or delivered as a Crater ForgeFed task
`/v1/responses`	POST	Responses API, translated to Anthropic Messages or forwarded to the selected OpenAI-compatible provider
`/v1/models`	GET	OpenAI-shaped union of models from healthy subscriptions in automatic mode
`/api/openai/v1/*`	GET/POST	Namespaced aliases for models, Chat Completions, and Responses
`/api/codex/v1/*`	GET/POST	Codex namespace; Responses is the subscription's native protocol
`/api/qwen/v1/*`	GET/POST	Qwen namespace; forwards its native OpenAI-compatible protocol
`/api/gemini/v1beta/models`	GET	Native Gemini model list
`/api/gemini/v1beta/models/{model}`	GET	Native Gemini model metadata
`/api/gemini/v1beta/models/{model}:generateContent`	POST	Native Gemini generation
`/api/gemini/v1beta/models/{model}:streamGenerateContent`	POST	Native Gemini SSE response
`/api/vertex/v1/projects/.../models/{model}:generateContent`	POST	Native Vertex-style generation through Gemini Code Assist

Provider-specific namespaces use the matching healthy subscription in automatic mode, or the provider pinned by UPSTREAM_PROVIDER.

gpt-4o, gpt-4o-mini, gpt-4, and the o* reasoning families are explicit aliases for the Claude Sonnet / Haiku / Opus tiers respectively. Native claude-* IDs pass through unchanged. Other model names return 404 not_found_error instead of silently selecting a default model. Successful responses report the resolved Claude model that actually served the request.

With UPSTREAM_PROVIDER=gonka, /v1/chat/completions and /v1/responses forward OpenAI-compatible JSON to Gonka without Anthropic translation. If a request omits model, the router uses GONKA_MODEL.

With UPSTREAM_PROVIDER=openai-compatible, the same routes forward JSON to the configured provider. This supports LiteLLM proxy deployments by setting the provider base URL to the LiteLLM /v1 API base. Streaming OpenAI requests are passed through for OpenAI-compatible providers, and Anthropic-backed streaming requests are translated to OpenAI SSE chunks.

With UPSTREAM_PROVIDER=crater, /v1/chat/completions supports normal JSON responses and SSE with either request-body "stream": true or ?stream=true. The SSE stream emits OpenAI chat-completion chunks once the ForgeFed task resolves.

MPP charges for OpenAI endpoints

The OpenAI-compatible endpoints can advertise Machine Payments Protocol (MPP) charges with HTTP 402 Payment Required. Enable this only after configuring the amount, currency, and recipient for your payment method:

MPP_ENABLE=true
MPP_AMOUNT=0.05
MPP_CURRENCY=USD
MPP_RECIPIENT=acct_or_wallet
MPP_METHOD=stripe

When enabled, unpaid calls to /v1/chat/completions and /v1/responses return WWW-Authenticate: Payment ... with protocol="mpp" and intent="charge". This is separate from the ForgeFed/ActivityPub discovery surface. Payment credential settlement is intentionally not accepted until a method-specific verifier is configured.

Observability (`--disable-metrics` to opt out)

Endpoint	Method	Description
`/metrics`	GET	Prometheus text-exposition counters
`/v1/usage`	GET	JSON snapshot of all counters
`/v1/accounts`	GET	Multi-account health: cooldowns, last error, used count, configured limit, and remaining requests

/metrics and /v1/usage also attribute every authorised request to its router token — link_assistant_token_requests_total{token,label} and the token_calls JSON map. Set --audit-log for a durable JSONL trail of the same events. See docs/use-cases/audit-and-monitoring.md.

POST /api/tokens

Issue a new custom JWT token.

Request body:

{
  "ttl_hours": 24,
  "label": "my-token"
}

Field	Type	Default	Description
`ttl_hours`	integer	24	Token lifetime in hours
`label`	string	`""`	Optional human-readable label
`scope`	string	`""`	`"admin"` mints a credential that also unlocks the admin endpoints; omit for an ordinary client token

Response:

{
  "token": "la_sk_eyJ0eXAi...",
  "ttl_hours": 24,
  "label": "my-token"
}

Proxy Routes

Any request to /api/latest/anthropic/* is forwarded to the upstream Anthropic API. The proxy:

Validates the Authorization: Bearer la_sk_... or x-api-key: la_sk_... token
Replaces it with the real OAuth token
Forwards all headers (except host, authorization, x-api-key, connection, transfer-encoding)
Passes through the request body unmodified
Streams back the response (SSE-compatible)
Preserves the upstream status code and response headers

Error responses follow the Anthropic API error format:

{
  "type": "error",
  "error": {
    "type": "authentication_error",
    "message": "Token has expired"
  }
}

Status	Condition
401	Missing or invalid/expired token
403	Token has been revoked
502	OAuth token unavailable or upstream request failed

Configuration

Configuration is read by lino-arguments in this order: CLI flags, environment variables, .lenv, then .env. The default file format is Lino-style key/value notation:

TOKEN_SECRET: your-router-token-secret
UPSTREAM_PROVIDER: openai-compatible
OPENAI_COMPATIBLE_PROVIDER_NAME: litellm
OPENAI_COMPATIBLE_BASE_URL: http://litellm:4000/v1
OPENAI_COMPATIBLE_MODEL: claude-sonnet
OPENAI_COMPATIBLE_MODELS: claude-sonnet,gpt-4o

Every flag listed in --help has an env-var alias and can be configured from .lenv with the same env-var key.

Core

Flag / env	Default	Required	Description
`--token-secret` / `TOKEN_SECRET`	—	Yes	Secret key for signing/validating JWT tokens
`--port` / `ROUTER_PORT`	`8080`	No	Port to listen on
`--host` / `ROUTER_HOST`	`0.0.0.0`	No	Host/IP to bind to
`--claude-code-home` / `CLAUDE_CODE_HOME`	`~/.claude`	No	Primary Claude Code credentials directory
`--upstream-provider` / `UPSTREAM_PROVIDER`	`auto`	No	Automatically route by model across healthy subscriptions, or pin `anthropic`, `codex`, `gemini`, `qwen`, `gonka`, `crater`, or `openai-compatible`
`--upstream-base-url` / `UPSTREAM_BASE_URL`	`https://api.anthropic.com`	No	Upstream Anthropic API URL
`--api-format` / `UPSTREAM_API_FORMAT`	(auto)	No	Restrict the proxy to `anthropic` / `bedrock` / `vertex`
`--bridge-model` / `ANTHROPIC_BRIDGE_MODEL`	(per provider)	No	Upstream model used when `/v1/messages` is served from a non-Anthropic upstream (details)
`--audit-log` / `AUDIT_LOG`	(disabled)	No	Append one JSON line per authorised request (token id, label, provider, surface, path, model) to this file (details)
`--request-log` / `REQUEST_LOG`	`$DATA_DIR/requests.jsonl`	No	Redacted JSONL log of client requests, transformed upstream requests, and responses, tied together by `correlation_id`
`--request-log-max-bytes` / `REQUEST_LOG_MAX_BYTES`	`104857600` (100 MiB)	No	Hard request-log size bound; the oldest complete JSONL records are discarded first
`--verbose` / `VERBOSE`	`false`	No	Verbose tracing

Gonka provider

Gonka support is optional. Set UPSTREAM_PROVIDER=gonka to pin the deployment to it instead of using automatic subscription routing.

TOKEN_SECRET=your-router-token-secret

UPSTREAM_PROVIDER=gonka
GONKA_PRIVATE_KEY=your_gonka_private_key
GONKA_SOURCE_URL=https://node4.gonka.ai
GONKA_MODEL=Qwen/Qwen3-235B-A22B-Instruct-2507-FP8

Flag / env	Default	Required	Description
`--gonka-private-key` / `GONKA_PRIVATE_KEY`	—	Yes, for Gonka	Private key used to sign Gonka upstream requests
`--gonka-source-url` / `GONKA_SOURCE_URL`	`https://node4.gonka.ai`	No	Gonka source node URL
`--gonka-model` / `GONKA_MODEL`	`Qwen/Qwen3-235B-A22B-Instruct-2507-FP8`	No	Default model for Gonka OpenAI-compatible requests

Your Gonka account must be activated for inference, funded, and have a published on-chain public key. Participant registration is only needed for hosting.

Crater ForgeFed provider

Crater support is optional. It keeps router-issued la_sk_... tokens at the edge, then uses ForgeFed to submit work to a remote ticket tracker or exchange.

TOKEN_SECRET=your-router-token-secret

UPSTREAM_PROVIDER=crater
CRATER_FORGEFED_INBOX=https://tracker.example/inbox
CRATER_FORGEFED_TARGET=https://tracker.example/projects/demo
# Optional; defaults to ACTIVITYPUB_ACTOR_BASE_URL/actor/code
CRATER_FORGEFED_ACTOR=https://router.example/actor/code

Flag / env	Default	Required	Description
`--crater-forgefed-inbox` / `CRATER_FORGEFED_INBOX`	—	Yes, for Crater	Remote ForgeFed inbox that receives `Offer{Ticket}` activities
`--crater-forgefed-actor` / `CRATER_FORGEFED_ACTOR`	`${ACTIVITYPUB_ACTOR_BASE_URL}/actor/code`	No	Local actor URI used in outbound activities
`--crater-forgefed-target` / `CRATER_FORGEFED_TARGET`	inbox URI	No	Ticket tracker or project URI used as `Offer.target`
`--crater-poll-interval-ms` / `CRATER_POLL_INTERVAL_MS`	`1000`	No	Delay between task URI polls
`--crater-poll-timeout-secs` / `CRATER_POLL_TIMEOUT_SECS`	`120`	No	Maximum wait for `isResolved:true`

OpenAI-compatible / LiteLLM provider

Generic OpenAI-compatible providers are used when UPSTREAM_PROVIDER=openai-compatible. The boot-time config can come from .lenv, env vars, or CLI flags:

TOKEN_SECRET: your-router-token-secret
UPSTREAM_PROVIDER: openai-compatible
OPENAI_COMPATIBLE_PROVIDER_NAME: litellm
OPENAI_COMPATIBLE_BASE_URL: http://litellm:4000/v1
OPENAI_COMPATIBLE_API_KEY_ENV: LITELLM_MASTER_KEY
OPENAI_COMPATIBLE_MODEL: claude-sonnet
OPENAI_COMPATIBLE_MODELS: claude-sonnet,gpt-4o

Flag / env	Default	Required	Description
`--openai-compatible-provider-name` / `OPENAI_COMPATIBLE_PROVIDER_NAME`	`litellm`	No	Stored provider name to resolve
`--openai-compatible-base-url` / `OPENAI_COMPATIBLE_BASE_URL`	`http://localhost:4000/v1`	No	Upstream OpenAI-compatible `/v1` API base
`--openai-compatible-api-key` / `OPENAI_COMPATIBLE_API_KEY`	—	No	Inline upstream key; prefer persisted provider storage for long-lived secrets
`--openai-compatible-api-key-env` / `OPENAI_COMPATIBLE_API_KEY_ENV`	—	No	Environment variable containing the upstream key
`--openai-compatible-model` / `OPENAI_COMPATIBLE_MODEL`	—	No	Default model injected when requests omit `model`
`--openai-compatible-models` / `OPENAI_COMPATIBLE_MODELS`	—	No	Comma-separated models exposed from `/v1/models`

Persistent provider records live in <DATA_DIR>/providers.lenv. Inline provider API keys are encrypted with AES-GCM using a key derived from TOKEN_SECRET; API responses and CLI output only show whether a stored key is present.

link-assistant-router providers add \
  --name litellm \
  --base-url http://litellm:4000/v1 \
  --model claude-sonnet \
  --models claude-sonnet,gpt-4o \
  --api-key "$LITELLM_MASTER_KEY"

link-assistant-router providers list
link-assistant-router providers show litellm
link-assistant-router providers remove litellm

Provider records can also be imported from JSON, provider-store .lenv, or an indented Links-style config:

litellm
  kind "openai-compatible"
  base-url "http://litellm:4000/v1"
  model "claude-sonnet"
  models "claude-sonnet,gpt-4o"
  api-key-env "LITELLM_MASTER_KEY"

The HTTP API accepts the same shape at POST /api/providers:

{
  "name": "litellm",
  "kind": "openai-compatible",
  "base_url": "http://litellm:4000/v1",
  "default_model": "claude-sonnet",
  "models": ["claude-sonnet", "gpt-4o"],
  "api_key_env": "LITELLM_MASTER_KEY"
}

Routing & storage

Flag / env	Default	Description
`--routing-mode` / `ROUTING_MODE`	`direct`	`direct` (OAuth substitution), `cli` (Claude CLI subprocess), or `hybrid`
`--storage-policy` / `STORAGE_POLICY`	`both`	Persistent token store: `memory`, `text` (Lino), `binary`, or `both`
`--data-dir` / `DATA_DIR`	platform-specific	Where `tokens.lino` / `tokens.bin` live
`--claude-cli-bin` / `CLAUDE_CLI_BIN`	`claude`	Local Claude CLI binary used by the `cli` backend
`--additional-account-dirs` / `ADDITIONAL_ACCOUNT_DIRS`	(empty)	Comma-separated extra credential homes for the active subscription provider
`--account-routing-strategy` / `ACCOUNT_ROUTING_STRATEGY`	`round-robin`	New-session policy: `round-robin`, `priority`/`fill-first`, or `least-used`/`quota-first`
`--account-cooldown-secs` / `ACCOUNT_COOLDOWN_SECS`	`60`	Minimum cooldown after a quota response; a longer upstream `Retry-After` wins
`--session-affinity-ttl-secs` / `SESSION_AFFINITY_TTL_SECS`	`3600`	Inactive seconds before a conversation can be assigned again; `0` disables affinity
`--account-request-limits` / `ACCOUNT_REQUEST_LIMITS`	(unknown)	Comma-separated request caps, primary first then extras; must match pool size, and `0` means unknown/unlimited

Feature toggles

Flag / env	Default	Description
`--disable-openai-api` / `DISABLE_OPENAI_API`	off	Hide `/v1/chat/completions`, `/v1/responses`, `/v1/models`
`--disable-anthropic-api` / `DISABLE_ANTHROPIC_API`	off	Hide `/v1/messages*` and Bedrock paths
`--disable-metrics` / `DISABLE_METRICS`	off	Hide `/metrics`, `/v1/usage`, `/v1/accounts`
`--disable-login-api` / `DISABLE_LOGIN_API`	off	Hide `/api/login*`
`--login-cli-command` / `LOGIN_CLI_COMMAND`	`claude`	Program `/api/login` drives on a PTY
`--login-cli-args` / `LOGIN_CLI_ARGS`	(none; TUI `/login`)	Comma-separated arguments for that program; set `setup-token` for the narrow-scope alternative
`--login-session-ttl-secs` / `LOGIN_SESSION_TTL_SECS`	`900`	How long a pending login waits for its code before expiring
`--login-max-sessions` / `LOGIN_MAX_SESSIONS`	`4`	Maximum simultaneously pending logins; beyond it, `429`
`--experimental-compatibility` / `EXPERIMENTAL_COMPATIBILITY`	off	XML history, model spoofing and other community-proxy behaviours
`--admin-key` / `TOKEN_ADMIN_KEY`	—	Flat bootstrap Bearer key accepted by `/api/tokens*` alongside admin-scoped tokens
`--allow-anonymous-admin` / `ALLOW_ANONYMOUS_ADMIN`	off	Opt back into unauthenticated `/api/tokens` access (not recommended*)
`--admin-port` / `ADMIN_PORT`	— (disabled)	Port for the admin UI listener; no port, no admin surface
`--admin-host` / `ADMIN_HOST`	`127.0.0.1`	Address the admin UI listener binds, independent of the proxy
`--admin-claim-ttl-secs` / `ADMIN_CLAIM_TTL_SECS`	`120`	Lifetime of an unconfirmed admin bootstrap candidate
`--mpp-enable` / `MPP_ENABLE`	off	Return MPP `402 Payment Required` challenges on OpenAI endpoints
`--mpp-amount` / `MPP_AMOUNT`	`0.00`	Per-request MPP charge amount
`--mpp-currency` / `MPP_CURRENCY`	`USD`	Currency or asset for MPP charges
`--mpp-recipient` / `MPP_RECIPIENT`	—	Recipient wallet, merchant account, or payment address
`--mpp-method` / `MPP_METHOD`	—	Optional MPP payment method identifier

CLI subcommands

# Default: starts the HTTP server (same as `serve`).
link-assistant-router

# Issue / list / revoke / show tokens locally (no HTTP needed):
link-assistant-router tokens issue --ttl-hours 168 --label alice
# ...optionally cap how many upstream requests the token may make:
link-assistant-router tokens issue --ttl-hours 168 --label alice --max-requests 500
link-assistant-router tokens list
link-assistant-router tokens revoke <id>
link-assistant-router tokens show <id>

# Inspect configured accounts:
link-assistant-router accounts list

# Manage OpenAI-compatible upstream providers:
link-assistant-router providers add --name litellm --base-url http://litellm:4000/v1 --model claude-sonnet
link-assistant-router providers import providers.lenv
link-assistant-router providers list

# Safely configure local agentic CLIs against this router:
link-assistant-router clients list
link-assistant-router clients setup codex
link-assistant-router clients setup claude-code --token la_sk_...
link-assistant-router clients setup opencode
link-assistant-router clients setup qwen-code
link-assistant-router clients setup agent
link-assistant-router clients setup grok-cli
link-assistant-router clients show codex
link-assistant-router clients doctor codex
link-assistant-router clients remove codex

# Print resolved configuration + credential / store probes:
link-assistant-router doctor

Logging

The router uses tracing with the RUST_LOG environment variable:

# Default: info level
RUST_LOG=info ./target/release/link-assistant-router

# Debug level for detailed request tracing
RUST_LOG=debug ./target/release/link-assistant-router

# Trace level for maximum verbosity
RUST_LOG=trace ./target/release/link-assistant-router

RUST_LOG overrides the default info level (or the debug fallback selected by --verbose). Every HTTP request also writes a structured exchange to $DATA_DIR/requests.jsonl by default. Client and upstream phases share an x-request-id/correlation_id; credential headers and credential-shaped JSON fields are replaced with [REDACTED]. The file retains complete recent JSONL records within REQUEST_LOG_MAX_BYTES, without requiring an external rotator.

Docker Deployment

Build the image

docker build -t link-assistant/router .

Run the container

docker run -d \
  -p 8080:8080 \
  -e TOKEN_SECRET=your-secure-secret \
  -v /path/to/claude-code-home:/data/claude:ro \
  link-assistant/router

The Dockerfile sets CLAUDE_CODE_HOME=/data/claude by default, so mount your Claude Code session directory to /data/claude.

Credential lifecycle in a container

The single image intentionally contains no vendor CLI. It performs Claude OAuth and refresh in-process:

Operation	Needs the Claude CLI in the image?	Mount mode
Serve requests with a valid access token	No	`:ro`
Renew an expired access token	No — the router exchanges the `refreshToken` itself	`:ro`
First-time login (no credential file yet)	No — native OAuth	writable
`POST /api/login` (remote login over HTTP)	No — native OAuth	writable

Renewal happens in memory: the router exchanges the refreshToken stored in the mounted credential file against Anthropic's token endpoint and keeps the result in RAM. The credential file is never written to, which is why :ro keeps working across expiry — and why a restarted container refreshes again from the same file. The same mechanism already covers Codex, Gemini, and Qwen.

Two things still require a real login: a directory with no credential file at all, and a refreshToken that has itself been revoked or expired.

Logging in from inside a container

The regular image can authorize itself without a preinstalled Claude CLI:

# Log in once into a named volume (interactive, needs a writable mount)
docker run -it --rm \
  -v claude-home:/data/claude \
  ghcr.io/link-assistant/router:latest auth claude

# Then run the router against that volume
docker run -d \
  -p 8080:8080 \
  -e TOKEN_SECRET=your-secure-secret \
  -v claude-home:/data/claude \
  ghcr.io/link-assistant/router:latest

If native OAuth fails, auth claude downloads the current Claude Code package through bun into a temporary cache, completes the compatibility flow, and removes that cache. Force this path with auth claude --flow cli.

Docker Compose example

version: "3.8"
services:
  router:
    build: .
    ports:
      - "8080:8080"
    environment:
      TOKEN_SECRET: ${TOKEN_SECRET}
      ROUTER_PORT: "8080"
    volumes:
      # `:ro` is enough: token renewal happens in memory. Drop `:ro` (and use
      # `:ro` can be dropped when authorizing from the container.
      - ${HOME}/.claude:/data/claude:ro
    restart: unless-stopped

VPS Deployment

To deploy on a VPS (e.g., Ubuntu):

# 1. Install Rust
curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
source ~/.cargo/env

# 2. Clone and build
git clone https://github.com/link-assistant/router.git
cd router
cargo build --release

# 3. Set up Claude Code credentials on the VPS
# (log in with Claude Code to create session files)
claude

# 4. Create a systemd service (optional, for auto-start)
sudo tee /etc/systemd/system/link-assistant-router.service > /dev/null <<EOF
[Unit]
Description=Link.Assistant.Router
After=network.target

[Service]
Type=simple
User=$USER
Environment=TOKEN_SECRET=your-secure-secret
Environment=ROUTER_PORT=8080
Environment=CLAUDE_CODE_HOME=/home/$USER/.claude
ExecStart=/home/$USER/router/target/release/link-assistant-router
Restart=on-failure
RestartSec=5

[Install]
WantedBy=multi-user.target
EOF

sudo systemctl daemon-reload
sudo systemctl enable link-assistant-router
sudo systemctl start link-assistant-router

# 5. Check status
sudo systemctl status link-assistant-router
journalctl -u link-assistant-router -f

Akash and Kubernetes

Ready-to-edit deployment templates are included for hosted environments:

Replace placeholder secrets, set ACTIVITYPUB_ACTOR_BASE_URL to the public router URL, and mount or provision Claude Code credentials at CLAUDE_CODE_HOME before exposing the service.

ForgeFed Integration

The router exposes ActivityPub/ForgeFed endpoints for service discovery and problem-source federation. See docs/forgefed.md for the actor document, inbox, follow activity, and deployment verification steps.

Token System

The router uses JWT-based custom tokens with the la_sk_ prefix.

Token lifecycle

Issue: POST /api/tokens creates a signed JWT with a UUID subject, expiration, optional label, and an optional per-token request budget
Validate: Each proxy request extracts the Authorization: Bearer la_sk_... header, strips the prefix, and verifies the JWT signature and expiration
Meter: When the token carries a request budget, each forwarded request increments a persisted used_requests counter; once it reaches max_requests the router returns 429 Too Many Requests instead of forwarding upstream
Revoke: Tokens can be revoked by their subject ID. Records (including the revoked flag and usage counter) are written to the persistent token store, so revocations and usage survive restarts

Token format

Tokens are standard HS256 JWTs with the la_sk_ prefix. The JWT payload contains:

{
  "sub": "550e8400-e29b-41d4-a716-446655440000",
  "iat": 1710806400,
  "exp": 1710892800,
  "label": "my-token",
  "scope": "admin"
}

scope is absent (or empty) on an ordinary client token and "admin" on an administrative one — see Admin access.

Admin access

The /api/tokens* endpoints — and every other endpoint marked (admin) above — are closed by default. Three things can open them:

An admin-scoped token. It is an ordinary la_sk_… JWT carrying "scope": "admin", so it expires, has an identity (sub), shows up in tokens list, and can be revoked and rotated like any other token.

# CLI
link-assistant-router tokens issue --admin --ttl-hours 168 --label ops
# HTTP (from an existing admin credential)
curl -s -X POST http://localhost:8080/api/tokens \
  -H "Authorization: Bearer $ADMIN" -H "Content-Type: application/json" \
  -d '{"ttl_hours": 168, "label": "ops", "scope": "admin"}' | jq -r .token

Rotation is a single step — mint the replacement and revoke the credential that asked for it:

link-assistant-router tokens rotate <sub> --ttl-hours 168 --label ops
curl -s -X POST http://localhost:8080/api/tokens/rotate \
  -H "Authorization: Bearer $ADMIN" -H "Content-Type: application/json" -d '{}' | jq .

The flat --admin-key / TOKEN_ADMIN_KEY. Still supported unchanged as a bootstrap and compatibility credential for deployments that configure everything externally, and now compared in constant time. It carries no identity or expiry, so it cannot rotate itself (/api/tokens/rotate answers 400); prefer an admin-scoped token for day-to-day use.
Nothing at all — only if you pass --allow-anonymous-admin (ALLOW_ANONYMOUS_ADMIN=1). This restores the historical wide-open behaviour and is logged as a warning at startup.

When neither an admin key nor an active admin token exists, the router mints one on startup and prints it once:

Admin token (shown once, store it now): la_sk_eyJ0eXAi...

A client token presented to an admin endpoint is rejected: authorisation is by scope, not by "any valid token".

Per-token request budget

Each token can carry an optional cap on the number of upstream requests it may make. This lets you hand a scoped token to a separate task or agent and bound how much of your Claude MAX subscription that task can consume, without ever exposing the real OAuth credential.

# CLI: issue a token limited to 100 upstream requests
link-assistant-router tokens issue --ttl-hours 24 --label scoped-agent --max-requests 100

# HTTP: same, via the admin endpoint
curl -s -X POST http://localhost:8080/api/tokens \
  -H "Content-Type: application/json" \
  -d '{"ttl_hours": 24, "label": "scoped-agent", "max_requests": 100}' | jq .

Omitting --max-requests / max_requests leaves the token unlimited.
Usage is counted per forwarded request and persisted in the token store, so the budget is enforced across restarts.
When the budget is exhausted the router responds with 429 Too Many Requests and a rate_limit_error body ({"error":{"message":"Token has reached its request limit",...}}) instead of forwarding upstream.
tokens list shows a requests column as used/max (e.g. 42/100), or used/- for unlimited tokens.

Security notes

The TOKEN_SECRET must be kept secure — anyone with the secret can forge tokens
OAuth tokens from the Claude Code session are never exposed to clients
Tokens are validated on every request
Use a strong, random secret (e.g., openssl rand -hex 32)
Pair short TTLs with max_requests to give each task a tightly scoped, self-expiring credential

Testing

Run all tests

cargo test

This runs the unit, integration, release-workflow, and documentation tests, including account affinity/caps, provider-scoped token caching, request-routing metadata, protocol translation, metrics, and configuration validation.

Run specific test suites

# Unit tests only
cargo test --lib

# Integration tests only
cargo test --test integration_test

# A specific test
cargo test test_token_roundtrip

# With verbose output
cargo test -- --nocapture

Code quality checks

# Check formatting
cargo fmt --check

# Run Clippy lints
cargo clippy --all-targets --all-features

# All checks together
cargo fmt --check && cargo clippy --all-targets --all-features && cargo test

Manual end-to-end testing

Use the provided script to test the router locally:

# Make the script executable
chmod +x scripts/test-manual.sh

# Run manual tests (starts the router, issues a token, tests endpoints)
./scripts/test-manual.sh

Or test manually step by step:

# Terminal 1: Start the router with a test credential file
mkdir -p /tmp/test-claude
echo '{"accessToken": "test-oauth-token"}' > /tmp/test-claude/credentials.json
export TOKEN_SECRET=test-secret
export CLAUDE_CODE_HOME=/tmp/test-claude
export UPSTREAM_BASE_URL=https://api.anthropic.com
cargo run

# Terminal 2: Test the endpoints

# 1. Health check
curl -s http://localhost:8080/health
# Expected: ok

# 2. Issue a token
TOKEN=$(curl -s -X POST http://localhost:8080/api/tokens \
  -H "Content-Type: application/json" \
  -d '{"ttl_hours": 1, "label": "test"}' | jq -r '.token')
echo "Token: $TOKEN"

# 3. Test proxy with token (will get auth error from Anthropic since test-oauth-token is not real)
curl -s http://localhost:8080/api/latest/anthropic/v1/messages \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json" \
  -H "anthropic-version: 2023-06-01" \
  -d '{"model": "claude-sonnet-4-20250514", "max_tokens": 10, "messages": [{"role": "user", "content": "Hi"}]}' | jq .

# 4. Test without token (should get 401)
curl -s http://localhost:8080/api/latest/anthropic/v1/messages | jq .

# 5. Test with invalid token (should get 401)
curl -s http://localhost:8080/api/latest/anthropic/v1/messages \
  -H "Authorization: Bearer la_sk_invalid" | jq .

Run the example

cargo run --example basic_usage

This demonstrates token issuance, validation, and revocation programmatically.

Project Structure

.
├── .github/workflows/
│   └── release.yml           # CI/CD pipeline (lint, test, build, release)
├── changelog.d/              # Changelog fragments (per-PR documentation)
├── docs/                     # Documentation
│   ├── use-cases/            # One document per supported scenario / CLI
│   ├── case-studies/         # Per-issue research, requirements, solution plans
│   └── adr/                  # Architecture decision records
├── examples/
│   └── basic_usage.rs        # Token management example
├── scripts/
│   ├── test-manual.sh        # Manual end-to-end testing script
│   ├── bump-version.rs       # Version bumping utility
│   ├── check-file-size.rs    # File size validation
│   └── ...                   # Other CI/CD scripts
├── src/
│   ├── lib.rs                # Library root — re-exports modules
│   ├── main.rs               # Binary entry point — Cli dispatch + server setup
│   ├── cli.rs                # `lino-arguments`-based CLI parser + subcommands
│   ├── config.rs             # CLI/env/.lenv configuration
│   ├── crater.rs             # Crater ForgeFed task provider
│   ├── oauth.rs              # Claude Code OAuth credential reader
│   ├── accounts.rs           # Multi-account router (round-robin/priority/least-used + cooldowns)
│   ├── app_state.rs          # Shared HTTP handler state
│   ├── storage.rs            # Persistent token store (text Lino + binary backends)
│   ├── providers.rs          # OpenAI-compatible provider store + encrypted secrets
│   ├── proxy.rs              # Transparent API proxy with token swap, OpenAI shim, ops endpoints
│   ├── request_routing.rs    # Session/account routing signal extraction
│   ├── openai.rs             # OpenAI <-> Anthropic translation helpers
│   ├── anthropic_bridge.rs   # Anthropic Messages served from OpenAI-dialect upstreams
│   ├── anthropic_stream.rs   # OpenAI SSE -> Anthropic SSE translator
│   ├── audit.rs              # Per-token JSONL audit log
│   ├── claude_identity.rs    # Claude Code identity block required by Claude MAX OAuth
│   ├── metrics.rs            # Atomic counters, Prometheus rendering, JSON snapshots
│   └── token.rs              # Custom JWT token management (la_sk_...)
├── tests/
│   └── integration_test.rs   # Integration tests
├── experiments/              # Local end-to-end harnesses (see docs/case-studies/)
├── Cargo.toml                # Project configuration and dependencies
├── Dockerfile                # Multi-stage Docker build
├── CHANGELOG.md              # Project changelog
├── CONTRIBUTING.md           # Contribution guidelines
├── LICENSE                   # Unlicense (public domain)
└── README.md                 # This file

Contributing

See CONTRIBUTING.md for development setup, coding guidelines, and the pull request process.

License

Unlicense — Public Domain. See LICENSE for details.

link-assistant-router 0.58.0