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/ahrefs-public-api"

All apis

curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no email required.

GitHub Google LinkedIn

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

OpenAPI Specification

openapi: 3.2.0
info:
  title: Ahrefs Public API
  description: Ahrefs API v3 gives programmatic access to Ahrefs' SEO, marketing, and AI-search data — backlinks, organic and paid traffic, keywords, SERPs, rank tracking, site audits, brand/AI-search visibility, web and social analytics, and account management. This is the full spec for every tool; each tool also has its own spec under /reference/.
  termsOfService: https://ahrefs.com/terms
  contact:
    name: Ahrefs
    url: https://ahrefs.com/
    email: support@ahrefs.com
  version: 3.0.0
servers:
- url: https://api.ahrefs.com/v3
  description: Ahrefs API v3
security:
- http:
  - read
tags:
- name: Public
  description: Free endpoints that don't require an Ahrefs subscription, or require a free/public APIv3 key
paths:
  /public/crawler-ips:
    get:
      tags:
      - Public
      summary: Crawler IP addresses
      description: '>Requests to this endpoint are free and do not require an API key.'
      operationId: public.crawler-ips
      parameters:
      - $ref: '#/components/parameters/public.output'
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/public.crawler-ips'
            application/xml:
              schema:
                $ref: '#/components/schemas/public.crawler-ips'
        '400':
          $ref: '#/components/responses/public.error_400'
        '401':
          $ref: '#/components/responses/public.error_401'
        '403':
          $ref: '#/components/responses/public.error_403'
        '429':
          $ref: '#/components/responses/public.error_429'
        '500':
          $ref: '#/components/responses/public.error_500'
      security: []
  /public/crawler-ip-ranges:
    get:
      tags:
      - Public
      summary: Crawler IP ranges
      description: '>Requests to this endpoint are free and do not require an API key.'
      operationId: public.crawler-ip-ranges
      parameters:
      - $ref: '#/components/parameters/public.output'
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/public.crawler-ip-ranges'
            application/xml:
              schema:
                $ref: '#/components/schemas/public.crawler-ip-ranges'
        '400':
          $ref: '#/components/responses/public.error_400'
        '401':
          $ref: '#/components/responses/public.error_401'
        '403':
          $ref: '#/components/responses/public.error_403'
        '429':
          $ref: '#/components/responses/public.error_429'
        '500':
          $ref: '#/components/responses/public.error_500'
      security: []
  /public/domain-rating-free:
    get:
      tags:
      - Public
      summary: Domain rating free
      description: '>Requests to this endpoint are free, yet require an APIv3 key.


        >APIv3 keys are free to generate and use. If you don''t have an Ahrefs account, here''s how to get the key for free:

        >1. [Sign up](https://ahrefs.com/) for a free Ahrefs account (if you don''t have one)

        >2. Generate an API key in [Account settings → API keys](https://app.ahrefs.com/account/api-keys)

        >3. Add it to your requests: `Authorization: Bearer <token>`


        Use of this data is subject to the Domain Rating License at http://ahrefs.com/legal/domain-rating-license. Attribution required: "Domain Rating by Ahrefs" (https://ahrefs.com/).'
      operationId: public.domain-rating-free
      parameters:
      - description: 'The target of the search: a domain or a URL.'
        required: true
        explode: false
        schema:
          type: string
          format: url
        name: target
        in: query
      - $ref: '#/components/parameters/public.output'
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/public.domain-rating-free'
            application/xml:
              schema:
                $ref: '#/components/schemas/public.domain-rating-free'
        '400':
          $ref: '#/components/responses/public.error_400'
        '401':
          $ref: '#/components/responses/public.error_401'
        '403':
          $ref: '#/components/responses/public.error_403'
        '429':
          $ref: '#/components/responses/public.error_429'
        '500':
          $ref: '#/components/responses/public.error_500'
      security: []
  /public/domain-rating-top-domains:
    get:
      tags:
      - Public
      summary: Domain rating top domains
      description: '>Requests to this endpoint are free, yet require an APIv3 key.


        >APIv3 keys are free to generate and use. If you don''t have an Ahrefs account, here''s how to get the key for free:

        >1. [Sign up](https://ahrefs.com/) for a free Ahrefs account (if you don''t have one)

        >2. Generate an API key in [Account settings → API keys](https://app.ahrefs.com/account/api-keys)

        >3. Add it to your requests: `Authorization: Bearer <token>`


        Returns the top 1M domains ranked by Ahrefs Domain Rating, together with each domain''s current Domain Rating.

        Use `from` and `to` to request a range of rank positions. Each request can return up to 250k rows (e.g. `from=1&to=250000`).

        '
      operationId: public.domain-rating-top-domains
      parameters:
      - description: Rank position to start from.
        required: false
        explode: false
        schema:
          type: integer
          default: 1
        name: from
        in: query
      - description: Rank position to end at. You can request up to 250k rows at a time.
        required: false
        explode: false
        schema:
          type: integer
          default: 100
        name: to
        in: query
      - $ref: '#/components/parameters/public.output'
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/public.domain-rating-top-domains'
            application/xml:
              schema:
                $ref: '#/components/schemas/public.domain-rating-top-domains'
        '400':
          $ref: '#/components/responses/public.error_400'
        '401':
          $ref: '#/components/responses/public.error_401'
        '403':
          $ref: '#/components/responses/public.error_403'
        '429':
          $ref: '#/components/responses/public.error_429'
        '500':
          $ref: '#/components/responses/public.error_500'
      security: []
components:
  schemas:
    public.Error_response:
      properties:
        error:
          type: string
      type: object
      xml:
        name: AhrefsApiResponse
    public.crawler-ips:
      properties:
        ips:
          items:
            properties:
              ip_address:
                type: string
                title: ip_address
            type: object
          type: array
      type: object
      xml:
        name: AhrefsApiResponse
    public.domain-rating-free:
      properties:
        domain_rating:
          properties:
            domain_rating:
              type: number
              format: float
              title: domain_rating
              description: Current strength of your target's backlink profile compared to the other websites in our database on a 100-point logarithmic scale.
            license:
              type: string
              format: url
              title: license
              description: URL of the license terms that apply to use of Domain Rating data.
          type: object
      type: object
      xml:
        name: AhrefsApiResponse
    public.crawler-ip-ranges:
      properties:
        prefixes:
          items:
            properties:
              ipv4Prefix:
                type: string
                title: ipv4Prefix
            type: object
          type: array
      type: object
      xml:
        name: AhrefsApiResponse
    public.domain-rating-top-domains:
      properties:
        domains:
          items:
            properties:
              domain:
                type: string
                format: domain
                title: domain
                description: Domain name.
              domain_rating:
                type: number
                format: float
                title: domain_rating
                description: Current strength of the domain's backlink profile compared to the other websites in our database on a 100-point logarithmic scale.
              rank:
                type: integer
                title: rank
                description: Position of the domain in the top 1M ranking by Domain Rating (1 = highest).
            type: object
          type: array
      type: object
      xml:
        name: AhrefsApiResponse
  parameters:
    public.output:
      description: The output format.
      required: false
      explode: false
      schema:
        type: string
        enum:
        - json
        - csv
        - xml
        - php
      name: output
      in: query
  responses:
    public.error_400:
      description: Bad Request
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/public.Error_response'
        application/xml:
          schema:
            $ref: '#/components/schemas/public.Error_response'
    public.error_500:
      description: Internal Error
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/public.Error_response'
        application/xml:
          schema:
            $ref: '#/components/schemas/public.Error_response'
    public.error_401:
      description: Unauthorized
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/public.Error_response'
        application/xml:
          schema:
            $ref: '#/components/schemas/public.Error_response'
    public.error_429:
      description: Too Many Requests
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/public.Error_response'
        application/xml:
          schema:
            $ref: '#/components/schemas/public.Error_response'
    public.error_403:
      description: Forbidden
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/public.Error_response'
        application/xml:
          schema:
            $ref: '#/components/schemas/public.Error_response'
  securitySchemes:
    http:
      type: http
      scheme: bearer