Validate a bearer token

In a webhook automation you can use the cerb.commands.oauth2.token.validate action with api.command: to validate the JWT bearer token given in the request.

Create an example OAuth2 token from Cerb » Setup » Developers » OAuth2 Token Generator.

• automation
• policy

• 
  start:
    set:
      request_headers:
        authorization: Bearer: eyJ0eXAiOiJKV1QiLCJhbGc[...]
    api.command:
      inputs:
        name: cerb.commands.oauth2.token.validate
        params:
          token: {{request_headers.authorization|split(' ')|last}}
      output: results
      on_error:
  
  

  The results placeholder will contain keys for:

  • app_ (OAuth)
  • token_scopes
  • token_type
  • token_expires_at
  • worker_

  Cerb does not assume a Bearer token follows a specific format. You can:

  • Issue custom API keys using Authorization: Bearer blah-token header
  • Verify webhook secrets sent with POST requests
  • Validate HMAC signatures using shared secrets

• 
  commands:
    api.command:
      deny/name@bool: {{inputs.name not in ['cerb.commands.oauth2.token.validate']}}
      allow@bool: yes