Machine-readable
The same API, in the formats agents actually read — indexes, specs, and discovery files.
Everything on the API reference is generated from the same source as these files, so they never drift. Point an agent at llms.txt to discover the API, docs.md to implement against it, and openapi.json to type it.
llms.txtIndex of the API for AI agents (llmstxt.org)docs.mdThe API reference as clean markdown, one fetchopenapi.jsonOpenAPI 3.1 spec — schemas for every endpoint.well-known/x402x402 paid-resource manifest (discovery fan-out).well-known/api-catalogAPI discovery pointer (RFC 9727)x402scanOur live listing + usage stats on the x402 directory