Setup: Integrations → Add API. Provide Name, Base URL, Auth (headers/bearer/API key), optional rate‑limit settings, request templates (path/query/body), and an optional response schema or field map. Click Test Connection, fix auth or CORS/pagination issues, then Create. Dreambase uses these APIs read‑first for enrichment inside the project you choose; we don’t replicate data unless you explicitly configure it. IDs should map to keys in your Supabase tables for joins; define that once to avoid guesswork. Best practices: keep scopes minimal, redact PII, set sane timeouts/backoff, and document the fields you expect. Common fixes: 401/403 (check headers), 429 (raise limits or backoff), and pagination mismatches (confirm cursors vs page/limit). Result: external context when you need it, still anchored to Supabase as the source of truth.