generated: '2026-09-16'
method: probed
source: live responses from https://sequans.com/wp-json/mcp/* and https://sequans.com/.well-known/oauth-* on 2026-09-16
docs: null
description: >-
  Cross-cutting semantics of Sequans' only API-shaped surface, the WordPress MCP Adapter server on
  sequans.com. Sequans documents none of this; each entry below was observed on the live host, and
  where a convention is absent that absence is recorded. The tool list is auth-gated, so nothing is
  asserted about individual tools.
authentication:
  style: OAuth 2.1 authorization code + PKCE (S256), bearer token in the Authorization header
  challenge: RFC 9728 WWW-Authenticate with resource_metadata on 401
  detail: authentication/sequans-authentication.yml
protocol:
  transport: MCP over HTTP (JSON-RPC 2.0)
  methods_allowed: [POST, GET, DELETE]
error_envelope:
  format: wordpress-rest
  rfc9457: false
  shape: '{"code": "<string>", "message": "<string>", "data": {"status": <int>}}'
  observed:
  - code: mcp_unauthorized
    status: 401
    url: https://sequans.com/wp-json/mcp/mcp-oauth-server
  - code: rest_forbidden
    status: 401
    url: https://sequans.com/wp-json/mcp/mcp-adapter-default-server
cors:
  access_control_allow_headers: Authorization, X-WP-Nonce, Content-Disposition, Content-MD5, Content-Type
  access_control_expose_headers: X-WP-Total, X-WP-TotalPages, Link
idempotency:
  coverage: none
  mechanism: null
  note: No Idempotency-Key header or replay protection is documented or advertised.
reversibility:
  status: unknown
  note: >-
    The MCP tool list is auth-gated and undocumented, so whether any write ability exists, and
    whether it can be reversed, cannot be established from public evidence. No reversal operation
    or window is asserted.
versioning:
  scheme: none published
rate_limit_signaling:
  headers: none observed
  detail: rate-limits/sequans-rate-limits.yml
request_id: none observed
x-evidence:
  fetched: '2026-09-16'
  probes:
  - url: https://sequans.com/wp-json/mcp/mcp-oauth-server
    status: 401
  - url: https://sequans.com/wp-json/mcp/mcp-adapter-default-server
    status: 401