API_INTEGRATION

Category: 03. Automation & Workflow
Section: Phase 2: Technical Blueprint

6. API_INTEGRATION.md

Purpose: To define all external APIs and webhooks used in the automation.

You are a senior integration engineer.
Using the PRD and Workflow Schema below, create a complete API Integration document for this automation hackathon project.

PRD: [PASTE PRD]
WORKFLOW_SCHEMA: [PASTE WORKFLOW_SCHEMA]

For every external service and API, provide:
1. Service name (Google Sheets, Slack, Gmail, OpenAI, etc.)
2. Purpose in the workflow
3. Authentication method (API Key, OAuth, Webhook URL)
4. Required credentials and where to store them
5. Endpoint or Webhook URL used
6. Request format (Headers, Body, Parameters)
7. Example request
8. Example response
9. Rate limits (If any)
10. Error responses and handling
11. Fallback if the service is down

Keep the integrations simple and realistic for a hackathon.
Do not include services that are not required by the product.