Tango
Unified API for U.S. federal government contracting data — SAM.gov, USAspending, FPDS, and more, one key.
| What is it | Unified API for U.S. federal government contracting data — SAM.gov, USAspending, FPDS, and more, one key. |
|---|---|
| Pricing | Freemium — from $25/mo |
| Free tier | Yes |
| Platform | API |
| API | Yes |
| Works with | Claude AI |
| Best for | building capture pipelines for federal contracts, analyzing government spending and procurement trends |
| Domain registered | 2024 |
Data updated Aug. 1, 2026
What does Tango do?
Tango is a unified API for U.S. federal government contracting data. It pulls together information from SAM.gov, USAspending, FPDS, DSBS, GSA eLibrary, Grants.gov, GAO bid protests, and agency forecasts — all accessible through a single API key. Instead of stitching together multiple government databases with different schemas, developers get one consistent interface for contracts, opportunities, entities, subawards, grants, and protests.
The API is built for developers who need reliable, normalized data without scraping or memorizing agency acronyms. Data refreshes on a schedule that matches each source: opportunities update every 20–60 minutes, contracts and IDVs refresh twice daily, and subawards update daily. Webhooks let you subscribe to changes in awards, opportunities, entities, grants, and forecasts so your pipeline sees updates as they happen. Tango also provides first-class SDKs for Python, Node, Go, and Rust, plus an MCP server for AI agents like Claude and Cursor. Response shaping lets you request only the fields you need, reducing payload size and token costs.
Tango is most useful for software developers, govcon professionals, and data analysts who build tools around federal procurement. Common use cases include capture pipeline automation, spending analysis, and integrating procurement data into dashboards or AI agents. If you've ever tried to work with raw USASpending or SAM.gov data, Tango saves you the headache of schema wrangling and ID resolution.
Key features
What makes it stand outWho is Tango for?
Who benefits most from this toolPricing
Free tier available — start without a credit cardFree
- Community Support
- 25/minute Rate limit
- 3,000 Monthly total
- Not available Entity monitoring
- 100 Daily API requests
- 1 alert subscription Webhook subscriptions
- Full access to raw public data
- Standard rate limiting
- Community support
- 1 webhook alert subscription
Micro
- Email Support
- 25/minute Rate limit
- 7,500 Monthly total
- Not available Entity monitoring
- 250 Daily API requests
- 3 alert subscriptions Webhook subscriptions
- Enriched data fields
- CALC labor rate lookups
- Attachment text extraction
- Email support
- 3 webhook alert subscriptions
Small
- Priority Email Support
- 100/minute Rate limit
- 45,000 Monthly total
- Not available Entity monitoring
- 1,500 Daily API requests
- 5 alert subscriptions Webhook subscriptions
- Enriched data fields
- CALC labor rate lookups
- Attachment text extraction
- Priority email support
- 5 webhook alert subscriptions
Medium
- Phone + Email Support
- 100/minute Rate limit
- 225,000 Monthly total
- Not available Entity monitoring
- 7,500 Daily API requests
- 10 alert subscriptions Webhook subscriptions
- Enriched data fields
- CALC labor rate lookups
- Attachment text extraction
- Phone and email support
- 10 webhook alert subscriptions
- SLA guarantees
Large
- Dedicated Account Manager Support
- 100/minute Rate limit
- 750,000 Monthly total
- Specific entities + alerts Entity monitoring
- 25,000 Daily API requests
- 25 subscriptions Webhook subscriptions
- Enriched data fields
- CALC labor rate lookups
- Attachment text extraction
- Webhook event subscriptions
- Dedicated account manager
- 99.9% uptime SLA
Trust & presence
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