generated: '2026-07-18'
method: searched
source: https://ctd.ai/integrations-api + https://ctd.ai/pricing + OAuth well-known metadata
auth:
  rest: Two headers — ctd-api-key + ctd-client-id (apiKey). No OAuth, no SDK.
  mcp: OAuth 2.0 authorization_code + PKCE (S256), dynamic client registration.
  cross_link: authentication/ctd-authentication.yml
versioning:
  style: uri-path
  current: v1
  example: https://api.ctd.ai/user/atc-paths-api/public/v1/
  cross_link: lifecycle/ctd-lifecycle.yml
rate_limiting:
  policy: >-
    Standard rate limits only; unlimited usage on paid plans with no credits to buy
    and no per-call pricing. Professional = basic API/MCP; Team/Business = full
    (everything exposed).
  signaling: not publicly documented
pagination:
  present: true
  detail: >-
    List operations exist (reachable people/companies, ghost emails, activity feed,
    recent job changes) but pagination parameters/response fields are not published.
idempotency: not documented
field_expansion: not documented
metadata: not documented
request_id_tracing: not documented
error_envelope:
  detail: not publicly documented (no OpenAPI or error reference published)
  cross_link: null
sdk: none — the REST API is designed for direct HTTP use with no SDK.