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/similarweb-similar-sites-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 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.

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: SimilarWeb REST Similar Sites API
  description: The SimilarWeb REST API provides real-time access to digital intelligence data covering website traffic and engagement metrics, traffic source breakdowns, audience demographics, keyword and search intelligence, mobile app performance, technographic data, e-commerce shopper behavior, company firmographics, and rank tracking. Authentication is via API key and usage is metered on a data credit model.
  version: 4.0.0
  termsOfService: https://www.similarweb.com/corp/legal/terms-of-use/
  contact:
    name: SimilarWeb Support
    url: https://support.similarweb.com/hc/en-us/articles/22089555897373-REST-API
  license:
    name: Proprietary
    url: https://www.similarweb.com/corp/legal/terms-of-use/
servers:
- url: https://api.similarweb.com
  description: SimilarWeb API server
tags:
- name: Similar Sites
  description: Similar website discovery
paths:
  /v2/website/{domain_name}/similar-sites:
    get:
      operationId: getSimilarSites
      summary: Similar Sites
      description: Retrieve the top 40 similar websites to a given domain with similarity scores.
      tags:
      - Similar Sites
      security:
      - apiKeyQuery: []
      parameters:
      - $ref: '#/components/parameters/domainName'
      - $ref: '#/components/parameters/apiKeyQuery'
      - $ref: '#/components/parameters/format'
      responses:
        '200':
          description: Similar sites list
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/SimilarSitesResponse'
        '400':
          $ref: '#/components/responses/BadRequest'
components:
  schemas:
    MetaObject:
      type: object
      description: Standard response metadata
      properties:
        request:
          type: object
          description: Echo of the original request parameters
        status:
          type: string
          description: Request status (Success or error)
        last_updated:
          type: string
          format: date
          description: Timestamp of the most recent data update
    SimilarSitesResponse:
      type: object
      properties:
        meta:
          $ref: '#/components/schemas/MetaObject'
        similar_sites:
          type: array
          maxItems: 40
          items:
            type: object
            properties:
              url:
                type: string
                description: Similar site domain
              score:
                type: number
                description: Similarity score (0-1)
  responses:
    BadRequest:
      description: Bad request - invalid parameters or missing required fields
      content:
        application/json:
          schema:
            type: object
  parameters:
    format:
      name: format
      in: query
      required: false
      schema:
        type: string
        enum:
        - json
        - xml
        default: json
      description: Response format
    apiKeyQuery:
      name: api_key
      in: query
      required: true
      schema:
        type: string
      description: SimilarWeb API authentication key
    domainName:
      name: domain_name
      in: path
      required: true
      schema:
        type: string
        example: example.com
      description: Website domain without 'www.' prefix
  securitySchemes:
    apiKeyQuery:
      type: apiKey
      in: query
      name: api_key
      description: SimilarWeb API key passed as a query parameter
    apiKeyHeader:
      type: apiKey
      in: header
      name: api-key
      description: SimilarWeb API key passed as a request header
externalDocs:
  description: SimilarWeb Developer Documentation
  url: https://developers.similarweb.com/