Pick an Agency vs Trello

Pick an Agency runs a free, no-signup REST + MCP API over its directory of 47,000+ verified marketing agencies, publishing a machine-readable OpenAPI spec at `/api/v1/openapi.json` alongside `/search`, `/agencies/{slug}`, and `/match` endpoints for shortlisting agencies by service, location, and rating. An OPTIONS preflight against `/api/v1/search` confirms the advertised open CORS policy (`access-control-allow-origin: *`), and no endpoint ever demanded a key or returned an auth challenge, reconfirming the stored 'None' auth. The three data-fetching GET endpoints themselves consistently timed out from this sandbox's egress on every attempt — the spec and homepage load fine, so their live JSON payloads could not be directly confirmed this run, though nothing points to the API being down.

Trello turns Kanban-style boards, lists, and cards into a scriptable project-management primitive, letting integrations create, move, and archive cards or attach webhooks that fire on board activity. Every account gets a free API key, and requests carry that key plus a short-lived member token as query parameters rather than a full OAuth redirect — a live unauthenticated call to `/1/members/me` confirms this by returning 401 'invalid key' rather than a bearer-token challenge (auth corrected OAuth -> API Key; OAuth1.0a exists only as an alternate authorization flow for third-party apps). Trello's Power-Ups marketplace and countless third-party integrations run on this same public API, available on every pricing tier including the free plan, and CORS is wide open — both the GET and an OPTIONS preflight echo `access-control-allow-origin: *`, resolving the stored 'unknown' value to yes.