Is USA.gov free to use?

Yes, USA.gov is listed as a free public API. Visit the official documentation for current rate limits and usage policies.

Does USA.gov require authentication?

Yes, USA.gov requires API Key authentication. Check the documentation for setup instructions.

USA.gov — Free Public API

Overview

USA.gov provides government contact info — key-based.

⚠️ Status (verified 2026-08): a guessed path returned HTTP 404 {"code":"NOT_FOUND"} (structured) — the API is alive; route paths differ. Check the developer docs for valid routes.

What it provides

curl "https://api.usa.gov/contacts/v1/agencies?api_key=YOUR_KEY"

Notes

Agency contacts and government info (structured 404, verified).
Route paths per usa.gov/developer.

FAQ

Is USA.gov free? Key-based with a free tier.

Why 404? Our 2026-08 guess path was wrong (verified) — check the developer docs.

What does it provide? Government agency contacts.

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