CrawlCheck Dns Query API

The Dns Query API from CrawlCheck — 1 operation(s) for dns query.

GitHub OpenAPI

Operations 1

GET /dns-query Resolve over DNS (RFC 8484 DNS-over-HTTPS): TXT for ._v.crawlcheck.io carries… #

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this
  • find_apisBrowse and filter every API in the catalog.
  • get_api_artifactsOne API's artifacts, grouped by type.
  • get_openapiThe primary OpenAPI for this API.
  • find_similar_apisAPIs that look like this one.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This API
curl "https://apis.io/api/v1/apis/crawlcheck-io:crawlcheck-io-dns-query-api"
All apis
curl "https://apis.io/api/v1/apis?limit=25"

Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

A second provider on the same verified email joins the account you already have.

OpenAPI Specification

crawlcheck-io-dns-query-api-openapi.yml Raw ↑
openapi: 3.2.0
info:
  title: Crawlcheck Io Dns Query 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 Dns Query 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: Dns Query
paths:
  /dns-query:
    get:
      operationId: resolveOverDns
      summary: 'Resolve over DNS (RFC 8484 DNS-over-HTTPS): TXT for ._v.crawlcheck.io carries…'
      parameters:
      - name: name
        in: query
        schema:
          type: string
      - name: type
        in: query
        schema:
          type: string
      - name: dns
        in: query
        schema:
          type: string
      responses:
        '200':
          description: application/dns-message or application/dns-json
          content:
            application/dns-json:
              examples:
                worked:
                  summary: Shape; not a measurement.
                  value:
                    Status: 0
                    Question:
                    - name: github.com._v.crawlcheck.io
                      type: 16
                    Answer:
                    - name: github.com._v.crawlcheck.io.
                      type: 16
                      TTL: 3600
                      data: '"v=ccr1;d=github.com;st=measured;read=warn;cite=warn;connect=unsupported;transact=require_confirmation;o=…;f=…;l=…;k=…;x=…;s=…"'
              schema:
                type:
                - object
                - 'null'
                properties:
                  Status:
                    type:
                    - number
                    - 'null'
                  Question:
                    type:
                    - array
                    - 'null'
                    items:
                      type:
                      - object
                      - 'null'
                      properties:
                        name:
                          type:
                          - string
                          - 'null'
                        type:
                          type:
                          - number
                          - 'null'
                      additionalProperties: true
                  Answer:
                    type:
                    - array
                    - 'null'
                    items:
                      type:
                      - object
                      - 'null'
                      properties:
                        name:
                          type:
                          - string
                          - 'null'
                        type:
                          type:
                          - number
                          - 'null'
                        TTL:
                          type:
                          - number
                          - 'null'
                        data: {}
                      additionalProperties: true
                additionalProperties: true
                x-schema-source: worked-example
      x-codeSamples:
      - lang: Shell
        label: curl
        source: curl -s 'https://crawlcheck.io/dns-query?name=github.com._v.crawlcheck.io&type=TXT'
      security: []
      x-auth: public; no credential read
      tags:
      - Dns Query
    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