feat: auto-serve OpenAPI spec at /openapi.json for x402 resource servers#1965
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zdql wants to merge 3 commits intox402-foundation:mainfrom
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feat: auto-serve OpenAPI spec at /openapi.json for x402 resource servers#1965zdql wants to merge 3 commits intox402-foundation:mainfrom
zdql wants to merge 3 commits intox402-foundation:mainfrom
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Adds automatic OpenAPI 3.1.0 spec generation and hosting so that x402 sellers get a discoverable /openapi.json endpoint with zero configuration. The spec includes x-payment-info on each operation, matching the format expected by agentcash-discovery. - New @x402/core/openapi module (schemas, route parsing, payment info, bazaar extraction, operation builder) - All framework middlewares (Express, Hono, Fastify, Next.js) auto-register GET /openapi.json, opt-out with openAPIOptions: false - Extract isSingleRouteConfig/normalizeRoutes into @x402/core to deduplicate 7 copies of RoutesConfig discrimination across the codebase Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Summary
@x402/core/openapimodule that generates an OpenAPI 3.1.0 spec fromRoutesConfig, includingx-payment-infoon each operation (compatible with agentcash-discovery)GET /openapi.json— zero config for sellers, opt-out withopenAPIOptions: falseisSingleRouteConfig()andnormalizeRoutes()into@x402/core/server, deduplicating 7 copies of theRoutesConfigdiscrimination logic across the codebaseHow it works
The OpenAPI spec is lazily generated from the existing route config on first request. Each operation gets:
x-payment-infowith structured price (fixed/dynamic) andprotocols: [{ x402: {} }]:param→{param}) and bazaar discovery schemasx-guidancesupport ininfofor API-level documentation