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.
For: Investigative journalists, policy researchers, public-affairs and government-relations teams, ESG analysts tracking corporate political activity, opposition-research consultants
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Open Chat & MCPFederal 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.
The US Senate Lobbying Disclosure Act (LDA) filings system at lda.senate.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.
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.
Same dataset, exposed as a Model Context Protocol server. Drop the URL into Claude Desktop, Cursor, VS Code, Cline, Windsurf, or any other MCP client.
The link prefills the Add custom connector dialog — you still review the values and click Add, then Connect to complete OAuth.
Federal Lobbying Filings and paste the MCP URL into Remote MCP server URL.Custom connectors at claude.ai require a paid Claude plan (Pro, Max, Team, or Enterprise).