API Evangelist enhancements for Delx Protocol API

overlay: 1.0.0
info:
  title: API Evangelist enhancements for Delx Protocol API
  version: 1.0.0
extends: openapi/delx-ai-protocol-openapi.json
x-apievangelist:
  generated: '2026-09-19'
  method: generated
  source: Harvested verbatim from https://api.delx.ai/openapi.protocol.json on 2026-09-19; the original is never mutated.
    This overlay records catalog metadata and the observed runtime facts the contract omits.
actions:
- target: $.info
  update:
    x-apievangelist-provider: delx-ai
    x-apievangelist-harvested-from: https://api.delx.ai/openapi.protocol.json
    x-apievangelist-harvested: '2026-09-19'
    x-apievangelist-sibling-contract: openapi/delx-ai-commerce-x402-openapi.json
- target: $.servers[0]
  update:
    x-apievangelist-observed-headers:
    - x-ratelimit-limit
    - x-ratelimit-remaining
    - x-ratelimit-reset
    - x-delx-request-id
- target: $.paths['/v1/mcp/protocol'].post
  update:
    x-apievangelist-note: MCP Streamable HTTP endpoint (core tier). Canonical full-catalog endpoint is https://api.delx.ai/mcp;
      /v1/mcp is served with Deprecation and Sunset (2026-08-01) headers.
- target: $.paths['/v1/a2a'].post
  update:
    x-apievangelist-note: A2A JSON-RPC endpoint; method discovery at GET /api/v1/a2a/methods; agent card at /.well-known/agent-card.json.
- target: $
  update:
    tags:
    - name: protocol
      description: Free Protocol recovery artifacts
    - name: recovery
    - name: continuity
    - name: discovery
    - name: agents
    - name: tools
    - name: reliability
    - name: a2a