HTTP transport layer for the x402 payment protocol.

Provides header encoding/decoding, constants, and (feature-gated) client/server middleware for the x402 payment protocol.

Modules

• [constants] — HTTP header names, status codes, default URLs
• [headers] — Base64 encoding/decoding for x402 HTTP headers
• [error] — HTTP transport error types
• [facilitator] — HTTP facilitator client (feature: client)
• [client] — reqwest-middleware for automatic 402 handling (feature: client)
• [types] — HTTP server types (feature: server)
• [server] — Axum/Tower payment gate middleware (feature: server)