# Congress.gov API

**Canonical:** https://apis.io/providers/congress-gov/  
**Website:** https://www.congress.gov/  
**APIs profiled:** 20

The official REST API for the United States Congress, provided by the Library of Congress. It offers public access to machine-readable legislative data including bills, amendments, laws, committee reports, the Congressional Record, nominations, treaties, CRS reports, house votes, hearings, and member information. The API is free to use and requires a key obtained via the Data.gov signup page. Responses are available in JSON or XML format, with version 3 (v3) as the current release.

## Kin Score — 46.5 / 100 (developing)

Scored 2026-08-21 under rubric 0.12.0. Trend: flat (+0.0 from 46.5).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 53.4 |
| Governance | 9.8 |
| Contract Governance | 9.8 |
| Operational Transparency | 52.6 |
| Developer Ergonomics | 28.6 |
| Commercial Clarity | 52.6 |
| Access Clarity | 52.6 |

Regulatory layer — **Government & Public Sector**: 31.5 (matched via tags).

## Agent readiness — 34.7 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | na |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | na |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | na |

## Access

Free · Self-serve signup — onboarding: self-serve, pricing: free, trial: no (confidence: high).

## APIs (20)

- **Congress.gov API amendments API** — Returns amendment data from the API
- **Congress.gov API bill API** — Returns bill data from the API
- **Congress.gov API bound-congressional-record API** — Returns bound Congressional Record data from the API
- **Congress.gov API committee API** — Returns committee data from the API
- **Congress.gov API committee-meeting API** — Returns committee meeting data from the API
- **Congress.gov API committee-print API** — Returns committee print data from the API
- **Congress.gov API committee-report API** — Returns committee report data from the API
- **Congress.gov API congress API** — Returns congress and congressional sessions data from the API
- **Congress.gov API congressional-record API** — Returns Congressional Record data from the API
- **Congress.gov API crsreport API** — Returns Congressional Research Service (CRS) report data from the API
- **Congress.gov API daily-congressional-record API** — Returns daily Congressional Record data from the API
- **Congress.gov API hearing API** — Returns hearing data from the API
- **Congress.gov API house-communication API** — Returns House communication data from the API
- **Congress.gov API house-requirement API** — Returns House requirement data from the API
- **Congress.gov API house-vote API** — [BETA] Returns House of Representatives roll call vote data from the API
- **Congress.gov API member API** — Returns member data from the API
- **Congress.gov API nomination API** — Returns nomination data from the API
- **Congress.gov API senate-communication API** — Returns Senate communication data from the API
- **Congress.gov API summaries API** — Returns summaries data from the API
- **Congress.gov API treaty API** — Returns treaty data from the API

## Agentic access (1)

- **Congress Gov Agentic Access** — 108 operations

## Security (2)

- **Congress Gov Authentication** — apiKey · 1 scheme
- **Congress Gov Domain Security** — TLSv1.3 · DNSSEC · DMARC

## Plans (1)

- **Congress Gov Plans Pricing**

## Tags

Government, Legislative, Congress, Bills, Amendments, Members, Treaties, Nominations, Congressional Record, US Federal

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/congress-gov/). Scores are computed from the provider's own public artifacts under a published rubric.