r402-http 0.16.0

HTTP transport layer for the x402 payment protocol.
Documentation

r402-http

HTTP transport for the x402 payment protocol, part of the r402 workspace.

Highlights

  • Server Paygate + X402Middleware — Axum layer enforcing payments via ResourceServer (verify/settle hooks, cancel on handler failure), three settlement modes (sequential, concurrent, background), and HTTP-only PaygateHooks (API keys / KYT).
  • Client X402Client — thin reqwest_middleware adapter over r402_core::PaymentClient: 402 → sign → retry, plus on_payment_response with one corrective recovery.
  • Remote FacilitatorClient — /verify, /settle, /supported with 30s timeout, 429/5xx backoff, 10-minute /supported cache.
  • CORS — exposes Payment-Required and Payment-Response.

Cargo Features

Feature Surface
client reqwest_middleware-based buyer middleware.
server axum paygate / facilitator HTTP servers.
facilitator FacilitatorClient for talking to a remote
facilitator.
telemetry OpenTelemetry tracing instrumentation.
full All of the above.

Documentation

License

Dual-licensed under MIT and Apache-2.0.