Sterling

Sterling Authentication API

OAuth2 token exchange using your Client ID and Client Secret.

Documentation GitHub OpenAPI

Operations 1

POST /oauth/token Exchange Client ID and Client Secret for an access token #

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/sterling-check-authentication-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: Sterling Authentication API
  description: The Sterling API integrates background and identity screening into your platform and manages the process end to end.
  version: '2.0'
  contact:
    name: Sterling (a First Advantage company)
    url: https://www.sterlingcheck.com/services/api/
  x-documentation: https://apidocs.sterlingcheck.app/
  x-developer-portal: https://developer.sterlingcheck.app/
  x-acquisition: First Advantage completed acquisition of Sterling Check Corp on 2024-10-31 ($2.2B).
servers:
- url: https://api.sterlingcheck.app/v2
  description: Production (MODELED representative host - exact host provisioned with production credentials)
- url: https://api-sandbox.sterlingcheck.app/v2
  description: Sandbox / Integration (MODELED representative host - exact host provisioned with sandbox credentials)
security:
- oAuth2ClientCredentials: []
- bearerAuth: []
tags:
- name: Authentication
  description: OAuth2 token exchange using your Client ID and Client Secret.
paths:
  /oauth/token:
    servers:
    - url: https://auth.sterlingcheck.app
      description: OAuth token host (CONFIRMED domain)
    post:
      operationId: createAccessToken
      tags:
      - Authentication
      summary: Exchange Client ID and Client Secret for an access token
      description: '[CONFIRMED] Send your Client ID and Client Secret to obtain an OAuth2 access token. The response contains an access token used as a Bearer token on all subsequent requests. Credentials are region-scoped (US, EMEA, Canada, APAC) and differ between sandbox and production.'
      security: []
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - client_id
              - client_secret
              - grant_type
              properties:
                client_id:
                  type: string
                client_secret:
                  type: string
                grant_type:
                  type: string
                  enum:
                  - client_credentials
                  default: client_credentials
      responses:
        '200':
          description: An access token.
          content:
            application/json:
              schema:
                type: object
                properties:
                  access_token:
                    type: string
                  token_type:
                    type: string
                    example: Bearer
                  expires_in:
                    type: integer
                    example: 3600
        '401':
          $ref: '#/components/responses/Unauthorized'
components:
  schemas:
    Error:
      type: object
      properties:
        code:
          type: string
        message:
          type: string
  responses:
    Unauthorized:
      description: Missing or invalid access token.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  securitySchemes:
    oAuth2ClientCredentials:
      type: oauth2
      description: OAuth2 client credentials grant using your Client ID and Client Secret.
      flows:
        clientCredentials:
          tokenUrl: https://auth.sterlingcheck.app/oauth/token
          scopes: {}
    bearerAuth:
      type: http
      scheme: bearer
      description: The access token returned from the OAuth token exchange, sent as a Bearer token.