Etch

Etch Discovery API

Well-known metadata endpoints for aggregators and MCP clients.

GitHub OpenAPI

Operations 2

GET /.well-known/mcp/server-card.json SEP-1649 MCP Server Card; discoverable endpoint + version for aggregators #
GET /.well-known/oauth-protected-resource RFC 9728 Protected Resource Metadata; declares bearer-only (no OAuth flow) #

Specifications

⚙
OpenAPI
https://artifacts.apis.io/etch-systems/openapi/etch-systems-discovery-api-openapi.yml

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OpenAPI Specification

etch-systems-discovery-api-openapi.yml Raw ↑ 
openapi: 3.2.0
info:
  title: Etch public Discovery API
  description: Signed audit chain for AI agent decisions, offline-verifiable against pinned public keys. Every event is signed with a hybrid Ed25519 + FIPS 205 SLH-DSA-SHA2-128f envelope, Merkle-chained into an epoch, and epoch-anchored on Sigstore Rekor + Bitcoin OpenTimestamps. This document covers only the unauthenticated integration surface; the admin API requires bearer authentication and is not published.
  version: 0.2.0
  license:
    name: BUSL-1.1
    url: https://spdx.org/licenses/BUSL-1.1.html
  contact:
    name: Etch
    url: https://etch.systems
    email: support@etch.systems
servers:
- url: https://etch.systems
  description: Production
tags:
- name: Discovery
  description: Well-known metadata endpoints for aggregators and MCP clients.
paths:
  /.well-known/mcp/server-card.json:
    get:
      summary: SEP-1649 MCP Server Card; discoverable endpoint + version for aggregators
      operationId: wellKnownMcpServerCard
      tags:
      - Discovery
      responses:
        '200':
          description: OK
  /.well-known/oauth-protected-resource:
    get:
      summary: RFC 9728 Protected Resource Metadata; declares bearer-only (no OAuth flow)
      operationId: wellKnownOauthProtectedResource
      tags:
      - Discovery
      responses:
        '200':
          description: OK
externalDocs:
  description: Full documentation
  url: https://etch.systems/docs