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Search 20+ years of US federal lobbying disclosures — who pays whom to lobby which agency, on what issues, for how much. Sourced directly from the Senate LDA system.
Live probe refreshed Sep 18, 2026 · Endpoint host mcp.mcpbundles.com
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Investigative Journalists, Policy Researchers, Public Affairs Teams, ESG Risk Analysts
Top spenders this year
Headline 'who's spending the most' question — instantly establishes the dataset's value.
Who are the top 25 federal lobbying spenders in the most recent year? Show client name, total reported income, the lobbying firms they hired, and the top issue codes they lobbied on.
Connect Lobbying Intelligence to any MCP client in minutes
Opens ChatGPT on the web or desktop and asks it to use the WebMCP tools available here.
You’ll sign in to MCPBundles when your client connects.
https://mcp.mcpbundles.com/bundle/lobbyingSign in once, then chat here with saved access — one connection to many servers, with a history of what your AI ran.
MCPBundles publishes this directory for MCP discovery. Except where we host or operate an offering, third-party services run under their own terms. Product and company names on this page are used in a descriptive, identifying way (including under nominative fair use where applicable); they remain the property of their owners. Nothing here grants you rights in those marks, and nothing here is an offer to sell a third party's services. Terms
Lobbying Intelligence is used here only to identify this integration; MCPBundles is not affiliated with or endorsed by Lobbying Intelligence or its owner.
Opens ChatGPT on the web or desktop and asks it to use the WebMCP tools available here.
You’ll sign in to MCPBundles when your client connects.
https://mcp.mcpbundles.com/bundle/lobbyingSign in once, then chat here with saved access — one connection to many servers, with a history of what your AI ran.
Chat with AI and run tools instantly.
Browse all toolsClient deep-dive
Per-company drill-down — a daily-driver workflow for journalists and policy analysts.
What lobbying did Pfizer Inc. report in the last 4 quarters? Show me the registrants they retained, the agencies and committees lobbied, the issue areas, and the total amounts.
Issue area trend
Pivot the dataset by issue code — exactly the kind of question that drives policy newsrooms.
Trend total federal lobbying spend on AI / artificial intelligence (issue code 'SCI') over the last 5 years. Show year, filing count, total reported income, and the top 5 clients each year.
Registrant lookup
Registrant-side view — the natural complement to the client search.
Find the lobbying firm 'Akin Gump Strauss Hauer & Feld' and tell me their top 10 clients in the most recent year by reported income, plus the issues each client lobbied on.
Where does the data come from?
The US Senate Lobbying Disclosure Act (LDA) filings system at lda.gov — the authoritative source for every quarterly LD-2 disclosure and every LD-203 contribution report. We re-crawl weekly. Coverage extends back through 20+ years of historical filings.
Are state-level or executive-branch contacts included?
No. This dataset is the federal LDA filings only — lobbying of Congress, the Executive Office of the President, and most federal agencies, as required by the LDA. State-level lobbying registries are separate jurisdictions and not in this dataset.
How accurate are the income / expense figures?
Self-reported by the registrant, in $10,000 brackets up to a threshold and exact dollars above it. Many filings use the 'less than $5,000' bracket. Treat individual amounts as floor-bracketed estimates, but aggregate totals across many filings are a reliable signal of relative spend.
Related editorial
Lobbying Disclosure Search
How federal lobbying filings reveal registrants, clients, issues, and spending patterns.
Domain knowledge for Lobbying Intelligence — workflow patterns, data models, and gotchas for your AI agent.
Federal lobbying disclosures filed under the Lobbying Disclosure Act (LDA). ~108K filings per year, two years loaded. Sourced from the US Senate Office of Public Records LDA filings API and refreshed weekly.
Free, no authentication required.
Each LDA filing represents lobbying activity by one registrant (the lobbying firm) on behalf of one client (who paid). It includes:
A filing is identified by a UUID assigned by the LDA system.
| Code | Meaning |
|---|---|
| RR | Registration (a firm signing on a new client) |
| Q1 / Q2 / Q3 / Q4 | Quarterly activity report |
| Other LD-203 / amendment codes | Less common; treat as quarterly-equivalents |
Quarterly activity (Q1–Q4) is where the actual lobbying happens; registrations (RR) just establish the relationship and usually have no spending.
Who lobbies for X: Search by client name → list every registrant they've engaged, with issue codes and spending per quarter.
What is firm Y working on: Search by registrant → list active clients, total spend, and issue mix. Drill into a specific filing UUID for the full activity detail (issues, lobbyists, agencies targeted).
Foreign influence: Search by client with a client_country filter to find filings on behalf of foreign governments or foreign-controlled entities.
Issue tracking: Surface filings by registrant or client, then read the activity blocks on the filing detail — issue codes (TAX, HCR, IMM, etc.) and free-text issue descriptions show what was lobbied; the government-entities list shows which committees and agencies were targeted.
Spending leaderboard: Use registrant search across a year, then aggregate amount across the returned filings. (The dataset has no built-in ranking endpoint; ranking is a client-side aggregation.)
Federal lobbying disclosure filings under the Lobbying Disclosure Act — registrations, quarterly activity reports, and contribution reports. Includes registrant, client, lobbyist, issue codes, government entities, and income/expense amounts.
Lobbying Get Filing
Retrieve full details of a single federal lobbying filing by its UUID.
Lobbying Get Stats
Get summary statistics about the federal lobbying disclosure dataset — total filings, unique registrants and clients, f…
Lobbying Search Client
Search federal lobbying filings by client name — the organization that hired the lobbying firm.
Lobbying Search Registrant
Search federal lobbying filings by lobbying firm (registrant) name.
The US Senate Lobbying Disclosure Act (LDA) filings system at lda.gov — the authoritative source for every quarterly LD-2 disclosure and every LD-203 contribution report. We re-crawl weekly. Coverage extends back through 20+ years of historical filings.
No. This dataset is the federal LDA filings only — lobbying of Congress, the Executive Office of the President, and most federal agencies, as required by the LDA. State-level lobbying registries are separate jurisdictions and not in this dataset.
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Self-reported by the registrant, in $10,000 brackets up to a threshold and exact dollars above it. Many filings use the 'less than $5,000' bracket. Treat individual amounts as floor-bracketed estimates, but aggregate totals across many filings are a reliable signal of relative spend.
Client name (fuzzy), registrant name (fuzzy), filing year and quarter, issue code, government entity (agency or committee), and full-text search across the activity description. Each filing exposes a stable filing UUID for citation.
Add the MCPBundles server URL to your MCP client configuration (Claude Desktop, Cursor, VS Code, etc.). The URL format is: https://mcp.mcpbundles.com/bundle/lobbying. Authentication is handled automatically.
Lobbying Intelligence provides 4 tools that can be called by AI agents, along with a SKILL.md that gives your AI agent domain knowledge about when and how to use them.
Lobbying Intelligence uses open data APIs — no authentication required.
MCPBundles is an independent platform built on the open Model Context Protocol standard. Not affiliated with Anthropic PBC or Claude.
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