CrawlCheck Content Clock API

openapi: 3.2.0
info:
  title: Crawlcheck Io Content Clock API
  version: '1'
  contact:
    name: CrawlCheck
    url: https://crawlcheck.io/policy
    email: hello@crawlcheck.io
  license:
    name: Terms
    url: https://crawlcheck.io/policy
  x-core-contract:
    promise: 'These operations are the core contract. They stay at /api/v1 and keep answering for at least 180 days after any /api/v2 is announced; their stable fields change only in a new major version, and their provisional fields only after 30 days'' notice, per /docs/api/compatibility. Verifying what they return needs none of these calls: crawlcheck-verify.mjs checks a document on your machine against the published keys (/.well-known/http-message-signatures-directory) and the rotation record, read once with --online or saved for --keys. Everything else documented here is useful but secondary, and may change with the notice its fields'' tags promise.'
    operations:
    - method: GET
      path: /api/v1/resolve
      operationId: resolveDomainV1
    - method: POST
      path: /api/v1/resolve
      operationId: resolveBatchV1
    - method: POST
      path: /api/v1/preflight
      operationId: preflightV1
    - method: GET
      path: /api/v1/decisions/{sha256}
      operationId: decisionCheckV1
    - method: GET
      path: /api/v1/revocations
      operationId: revocations
    - method: GET
      path: /api/v1/visitor
      operationId: visitorResolveV1
    - method: POST
      path: /api/v1/visitor
      operationId: visitorResolveBatchV1
    - method: GET
      path: /api/v1/mcp/scan
      operationId: mcpScanUrl
    - method: POST
      path: /api/v1/mcp/lock/check
      operationId: mcpLockCheck
    list: https://crawlcheck.io/api/v1/core
  description: 'Operations tagged Content Clock across 2 of this provider''s published API definitions: crawlcheck-io-openapi.json, crawlcheck-io-openapi.yml. Each path carries the servers of the definition it was published in.'
servers:
- url: https://crawlcheck.io
tags:
- name: Content Clock
paths:
  /api/v1/content-clock:
    get:
      operationId: contentClockV1
      summary: 'Content-change clock for a page: a hash of its main content (chrome, ads…'
      parameters:
      - name: url
        in: query
        required: true
        schema:
          type: string
      responses:
        '200':
          description: crawlcheck-content-clock
          content:
            application/json:
              examples:
                worked:
                  value:
                    kind: crawlcheck-content-clock
                    v: 1
                    url: https://example.com/pricing
                    checked_at: '2026-10-20T09:00:00.000Z'
                    read_now: true
                    content_sha256: c41a…
                    content_chars: 5120
                    main_content_last_changed:
                      between: '2026-10-14T03:10:00.000Z'
                      and: '2026-10-14T03:40:00.000Z'
                    unchanged_since_first_observed: null
                    first_observed: '2026-10-07T04:30:00.000Z'
                    observations: 38
                    changes_observed: 1
                    declared:
                      last_modified_header: '2026-10-20T08:59:58.000Z'
                      json_ld_date_modified: '2026-09-01T00:00:00.000Z'
                    declared_vs_observed: the main content changed after the latest modification date the page declares
                    sha256: …
                    signature: …
              schema:
                type:
                - object
                - 'null'
                properties:
                  kind:
                    type:
                    - string
                    - 'null'
                  v:
                    type:
                    - number
                    - 'null'
                  url:
                    type:
                    - string
                    - 'null'
                  checked_at:
                    type:
                    - string
                    - 'null'
                  read_now:
                    type:
                    - boolean
                    - 'null'
                  content_sha256: {}
                  content_chars:
                    type:
                    - number
                    - 'null'
                  main_content_last_changed:
                    type:
                    - object
                    - 'null'
                    properties:
                      between:
                        type:
                        - string
                        - 'null'
                      and:
                        type:
                        - string
                        - 'null'
                    additionalProperties: true
                  unchanged_since_first_observed: {}
                  first_observed:
                    type:
                    - string
                    - 'null'
                  observations:
                    type:
                    - number
                    - 'null'
                  changes_observed:
                    type:
                    - number
                    - 'null'
                  declared:
                    type:
                    - object
                    - 'null'
                    properties:
                      last_modified_header:
                        type:
                        - string
                        - 'null'
                      json_ld_date_modified:
                        type:
                        - string
                        - 'null'
                    additionalProperties: true
                  declared_vs_observed:
                    type:
                    - string
                    - 'null'
                  sha256: {}
                  signature: {}
                additionalProperties: true
                x-schema-source: worked-example
        '422':
          description: page unreadable
      x-codeSamples:
      - lang: Shell
        label: curl
        source: curl -s 'https://crawlcheck.io/api/v1/content-clock?url=https://example.com/pricing'
      security: []
      x-auth: public; no credential read
      tags:
      - Content Clock
    servers:
    - url: https://crawlcheck.io
components:
  securitySchemes:
    licenceKey:
      type: apiKey
      in: header
      name: x-crawlcheck-key
      description: 'Your licence key: cc_ followed by 32 hex characters. Sent on every keyed call.'
    bearer:
      type: http
      scheme: bearer
      description: The same licence key as a Bearer token. Accepted on /api/v1/* and /api/usage.
externalDocs:
  url: https://crawlcheck.io/docs/api
  description: Human-readable reference
x-refined-from:
- crawlcheck-io-openapi.json
- crawlcheck-io-openapi.yml