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.

32.7/100 thin ▬ flat Agent 23/100 agent aware Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0
AccessFreemiumSelf serve⚡ Free to try
1 APIs
Federal-GovernmentLobbyingGovernment TransparencyCampaign FinanceOpen Data

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0
Regulatory Posture applies to this provider. Its tags matched the Government & Public Sector regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.
Create-or-Update Ergonomics does not apply to this provider. The published contracts declare no write operations, and a read-only API cannot create-or-update. The facet is excluded from this provider's denominator entirely — not scored zero. A reference or data API is not deficient for being unable to upsert.
The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. 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. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

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 8

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

API Collection

OPEN COLLECTION

Scroll for all 8

Pricing Plans 1

Published pricing tiers and plan structures.

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.

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 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

Access & Security 2

Authentication, authorization, and security posture

Company 1

The organization behind the API

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
tags_raw:
- Federal Government
- Lobbying
- Government Transparency
- Campaign Finance
- Open Data
kind: contract
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: true
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - openapi
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-09-03'
  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: '0.23'

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this
  • find_providersBrowse and filter every provider in the catalog.
  • get_provider_artifactsEvery artifact this provider publishes, grouped by type.
  • get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
  • get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
  • get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
  • get_provider_ratingPRO — composite, band, trend and facet scores.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This provider
curl "https://apis.io/api/v1/providers/us-senate"
All providers
curl "https://apis.io/api/v1/providers?limit=25"
Every operation they expose
curl "https://apis.io/api/v1/providers/us-senate/operations?limit=25"
How their score was established
curl "https://apis.io/api/v1/providers/us-senate/evidence"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

A second provider on the same verified email joins the account you already have.