Charity Search vs Trello

CharityAPI (rebranded from OrgHunter) looks up US nonprofits by EIN across basic profile, financial, geolocation, and NTEE-classification datasets, sourced from IRS filings and pitched at donation platforms and vetting tools. Its real backend at `data.orghunter.com` trades a query-string `user_key` for JSON responses and rejects unauthenticated calls with a 403, and offers free development-phase API keys with production usage gated behind paid or affiliate-only plans.

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.