US Senate website screenshot

US Senate

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.

US Senate publishes 6 APIs on the APIs.io network, including Clients API, Constants API, Contributions API, and 3 more. Tagged areas include Federal Government, Lobbying, Government Transparency, Campaign Finance, and Open Data.

The US Senate catalog on APIs.io includes 1 JSON-LD context and 2 Spectral governance rulesets.

US Senate’s developer surface includes authentication and 3 more developer resources.

🌐 Visit website 📡 Source on GitHub
42.2/100 developing ▬ flat Agent 31/100 agent aware Full breakdown ↓
scored 2026-07-28 · rubric v0.6
AccessFreemiumSelf serve⚡ Free to try
6 APIs
Federal GovernmentLobbyingGovernment TransparencyCampaign FinanceOpen Data

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6
Composite quality — 42.2/100 · developing
Contract Quality 16.5 / 25
Developer Ergonomics 2.2 / 20
Commercial Clarity 7.9 / 20
Operational Transparency 4.1 / 13
Governance 7.0 / 12
Discoverability 6.5 / 10
Agent readiness — 31/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/us-senate: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 6

Individual APIs this provider publishes, each with its own machine-readable definition.

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

Open Collections 1

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

US Senate Lobbying Disclosure Act (LDA) API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Us Senate Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Us Senate Rate Limits

5 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Us Senate Finops

FINOPS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Us Senate Context

4 classes · 19 properties

JSON-LD

Spectral Rules 2

Spectral governance rulesets for linting and validating these APIs.

US Senate API Rules

5 rules · 4 warnings 1 info

SPECTRAL

US Senate API Rules

7 rules · 2 errors 3 warnings 2 info

SPECTRAL

JSON Schema 1

Standalone JSON Schema definitions for this provider's data models.

Senate LDA Lobbying Filing

11 properties

JSON SCHEMA

JSON Structure 1

JSON Structure definitions describing this provider's data shapes.

Us Senate Lda Filing Structure

0 properties

JSON STRUCTURE

Examples 2

Example request and response payloads for these APIs.

Lda Get Registrant Example

2 fields

EXAMPLE

Lda List Filings Example

2 fields

EXAMPLE

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Us Senate Authentication

apiKey · 1 scheme

SECURITY

Us Senate Domain Security

TLSv1.3 · DNSSEC · DMARC

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Us Senate Agentic Access

14 operations

14 operations · 0 acting

AGENTIC

Resources

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication

Company 1

The organization behind the API

LinkedIn
LinkedIn

Source (apis.yml)

apis.yml Raw ↑ 
aid: us-senate
url: https://raw.githubusercontent.com/api-evangelist/us-senate/refs/heads/main/apis.yml
common:
- type: AgenticAccess
  url: agentic-access/us-senate-agentic-access.yml
- type: DomainSecurity
  url: security/us-senate-domain-security.yml
- type: Authentication
  url: authentication/us-senate-authentication.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/ussenate
apis:
- aid: us-senate:us-senate-clients-api
  name: US Senate Clients API
  description: Clients on whose behalf lobbying is conducted
  humanURL: https://lda.senate.gov/api/
  tags:
  - Clients
  properties:
  - type: OpenAPI
    url: openapi/us-senate-clients-api-openapi.yml
  - type: Documentation
    url: https://lda.senate.gov/api/
  - type: Documentation
    url: https://lda.senate.gov/api/redoc/v1/
- aid: us-senate:us-senate-constants-api
  name: US Senate Constants API
  description: Reference data — filing types, issue codes, government entities, etc.
  humanURL: https://lda.senate.gov/api/
  tags:
  - Constants
  properties:
  - type: OpenAPI
    url: openapi/us-senate-constants-api-openapi.yml
  - type: Documentation
    url: https://lda.senate.gov/api/
  - type: Documentation
    url: https://lda.senate.gov/api/redoc/v1/
- aid: us-senate:us-senate-contributions-api
  name: US Senate Contributions API
  description: Semi-annual campaign contribution reports (LD-203)
  humanURL: https://lda.senate.gov/api/
  tags:
  - Contributions
  properties:
  - type: OpenAPI
    url: openapi/us-senate-contributions-api-openapi.yml
  - type: Documentation
    url: https://lda.senate.gov/api/
  - type: Documentation
    url: https://lda.senate.gov/api/redoc/v1/
- aid: us-senate:us-senate-filings-api
  name: US Senate Filings API
  description: Lobbying disclosure filings (LD-1, LD-2, LD-203)
  humanURL: https://lda.senate.gov/api/
  tags:
  - Filings
  properties:
  - type: OpenAPI
    url: openapi/us-senate-filings-api-openapi.yml
  - type: Documentation
    url: https://lda.senate.gov/api/
  - type: Documentation
    url: https://lda.senate.gov/api/redoc/v1/
- aid: us-senate:us-senate-lobbyists-api
  name: US Senate Lobbyists API
  description: Individual lobbyist records
  humanURL: https://lda.senate.gov/api/
  tags:
  - Lobbyists
  properties:
  - type: OpenAPI
    url: openapi/us-senate-lobbyists-api-openapi.yml
  - type: Documentation
    url: https://lda.senate.gov/api/
  - type: Documentation
    url: https://lda.senate.gov/api/redoc/v1/
- aid: us-senate:us-senate-registrants-api
  name: US Senate Registrants API
  description: Lobbying firm and self-employed lobbyist registrations
  humanURL: https://lda.senate.gov/api/
  tags:
  - Registrants
  properties:
  - type: OpenAPI
    url: openapi/us-senate-registrants-api-openapi.yml
  - type: Documentation
    url: https://lda.senate.gov/api/
  - type: Documentation
    url: https://lda.senate.gov/api/redoc/v1/
name: US Senate
tags:
- Federal Government
- Lobbying
- Government Transparency
- Campaign Finance
- Open Data
kind: contract
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/us-senate.png
access: 3rd-Party
created: '2024-12-03'
modified: '2026-05-19'
position: Consuming
description: 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.
features:
- Lobbying Filing Search and Retrieval
- Registrant Information
- Client Information
- Lobbyist Profiles
- Campaign Contribution Reports
- Reference Data (Issue Codes, Government Entities)
useCases:
- Government transparency research
- Lobbying activity monitoring and analysis
- Campaign finance research
- Policy influence tracking
- Compliance verification for lobbyists
- Investigative journalism
integrations:
- data.gov
solutions:
- Government Transparency
- Lobbying Compliance
- Policy Research
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
specificationVersion: '0.19'