# US Senate

**Canonical:** https://apis.io/providers/us-senate/  
**APIs profiled:** 6

The United States Senate is one of the two chambers of Congress, responsible for representing the interests of the individual states and ensuring that federal legislation is passed in a fair and representative manner. The Senate plays a crucial role in the legislative process, with its members debating and voting on bills and resolutions that affect the country as a whole. The Senate also administers the Lobbying Disclosure Act (LDA) reporting system, which requires lobbyists and lobbying firms to register and report their activities, clients, and campaign contributions for public transparency.

## Kin Score — 31.3 / 100 (thin)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 31.3).

| Facet | Score |
|---|---|
| Discoverability | 64.8 |
| Contract Quality | 62.4 |
| Governance | 9.8 |
| Contract Governance | 9.8 |
| Operational Transparency | 7.9 |
| Developer Ergonomics | 11.9 |
| Commercial Clarity | 15.8 |
| Access Clarity | 15.8 |

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

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

## APIs (6)

- **US Senate Clients API** — Clients on whose behalf lobbying is conducted
- **US Senate Constants API** — Reference data — filing types, issue codes, government entities, etc.
- **US Senate Contributions API** — Semi-annual campaign contribution reports (LD-203)
- **US Senate Filings API** — Lobbying disclosure filings (LD-1, LD-2, LD-203)
- **US Senate Lobbyists API** — Individual lobbyist records
- **US Senate Registrants API** — Lobbying firm and self-employed lobbyist registrations

## Agentic access (1)

- **Us Senate Agentic Access** — 14 operations

## Security (2)

- **Us Senate Authentication** — apiKey · 1 scheme
- **Us Senate Domain Security** — TLSv1.3 · DNSSEC · DMARC

## Plans (1)

- **Us Senate Plans Pricing**

## Tags

Federal-Government, Lobbying, Government Transparency, Campaign Finance, Open Data

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