Grammarly · Authentication Profile

Grammarly Authentication

Authentication

Grammarly secures its APIs with oauth2 across 1 declared security scheme, as derived from its OpenAPI definitions. OAuth 2.0 is offered via the clientCredentials flow(s).

CompanyAiWriting AssistanceProductivityNatural Language ProcessingAnalyticsContentOAuthEnterprise
Methods: oauth2 Schemes: 1 OAuth flows: clientCredentials API key in:

Security Schemes

OAuth2ClientCredentials oauth2

Source

Authentication Profile

grammarly-authentication.yml Raw ↑ 
generated: '2026-07-19'
method: searched
source: https://developer.grammarly.com/oauth-credentials.html
docs: https://developer.grammarly.com/your-first-api-request.html
summary:
  types: [oauth2]
  oauth2_flows: [clientCredentials]
  api_key_in: []
  token_endpoint: https://auth.grammarly.com/v4/api/oauth2/token
  transport: Bearer access token in the Authorization header
schemes:
- name: OAuth2ClientCredentials
  type: oauth2
  flow: clientCredentials
  token_url: https://auth.grammarly.com/v4/api/oauth2/token
  token_request:
    method: POST
    parameters: [grant_type, client_id, client_secret, scope]
  credential_source: >-
    Client ID and Client Secret are issued from the Grammarly Admin panel
    (Organization > Configurations > OAuth 2.0 credentials). Each credential is
    assigned one or more OAuth scopes limiting it to specific APIs.
  request_auth:
    header: Authorization
    format: Bearer <access_token>
  sources: [developer.grammarly.com/oauth-credentials.html]
notes: >-
  Grammarly's enterprise developer APIs authenticate with OAuth 2.0 using the
  client-credentials grant. A machine-to-machine access token is obtained from
  the token endpoint with the org-issued client_id/client_secret plus the
  requested scope, then presented as a Bearer token against the API base URL
  https://api.grammarly.com/ecosystem/api/. See scopes/grammarly-scopes.yml for
  the scope catalog.