Best Government & Tenders APIs (2026)
Best Government & Tenders APIs (2026) are ReefAPI category hubs for live JSON: government & tenders APIs return structured data for developer workflows. ReefAPI offers 2 government & tenders APIs behind one key, one credit pool and the same { ok, data, meta, error } envelope, with examples derived from the catalog and committed live snapshots.
Ranked Government & Tenders API list
Ordered by how many endpoints each API exposes, then alphabetically.
| # | Engine | What it returns | Actions | Snapshot sample | Free tier | Landing |
|---|---|---|---|---|---|---|
| 1 | SAM.gov | Search every US federal contract opportunity by phrase — the demand side of a $700bn/year buyer... | 3 | opportunities: 665b0e5ea7794aa78e2bc60b45d19d0b; total_matches: 11 | yes | View API |
| 2 | UK Tenders | Search UK public-sector contract notices by phrase, status, value, deadline, CPV code and publi... | 2 | notices: a03c5aa0-2185-48fc-ab14-6a80b6e5ac01; total_matches: 12 | yes | View API |
What each Government & Tenders API covers
SAM.gov includes 3 actions (search, opportunity, attachments). US federal contract opportunities, response deadlines and award notices. The primary catalog return is search every us federal contract opportunity by phrase — the demand side of a $700bn/year buyer....
UK Tenders includes 2 actions (search, notice). UK public-sector tender notices and awards with values, deadlines and buyers. The primary catalog return is search uk public-sector contract notices by phrase, status, value, deadline, cpv code and publi....
Questions about Government & Tenders APIs
Which Government & Tenders API is free?
Every Government & Tenders API listed here can be tried with ReefAPI's free tier: 1,000 credits on signup, no card required. The current hub includes SAM.gov, UK Tenders.
Do these Government & Tenders APIs need login?
No source-site login is needed for the listed ReefAPI responses. You call ReefAPI with an x-api-key header, and each engine returns the standard JSON envelope.
How fresh is the Government & Tenders data?
Production requests fetch live data through ReefAPI. The table's sample data point comes from the committed snapshot for each engine, and the sitemap uses catalog freshness for recrawling.
What is the best Government & Tenders API to start with?
SAM.gov appears first because this hub ranks engines by action count, then alphabetically for ties. Use that as a coverage signal, then choose the API whose returned fields match your workflow.