OAuth Token Management System with Airtable Storage

This n8n workflow serves as a robust OAuth token generator and validator, designed for self-hosted n8n instances with community nodes. It receives client_id and client_secret via a POST webhook, validates them strictly against records in Airtable, generates a secure 128-character token upon success, stores it with metadata in Airtable, and responds with standard JSON including access_token, expires_in, and token_type. Failures at any step—such as missing fields, invalid client_id, or mismatched secret—trigger clear error JSON responses, ensuring reliable API-like behavior.

The workflow's flow is precise: a Code node validates input body fields, Airtable lookup checks client existence, an If node compares secrets, another Code node creates the token, Airtable inserts the new record, and the webhook responds accordingly. This setup minimizes custom coding needs while providing enterprise-grade security for token issuance.

Benefits include time-saving automation for custom auth systems, scalable storage via Airtable, and seamless integration with validation workflows like Bearer Token Authentication. Ideal use cases: securing customer APIs, internal service auth, SaaS token management, or prototyping OAuth flows without full backend development. Pair it with the related Bearer Token Validation workflow for complete request authentication.