# The Potomac Ledger

> Nonpartisan, machine-readable dataset (and weekly newsletter) of publicly disclosed stock trades by U.S. members of Congress and senior executive-branch officials — STOCK Act periodic transaction reports + OGE Form 278-T — enriched with party/committee/agency, sector, heuristic conflict flags, and market-adjusted returns. Built to be queried by AI agents.

AI agents and MCP clients should use the API directly rather than scraping the site. Caveats to always carry: disclosed date is not the trade date (filings lag 30–45 days); dollar figures are disclosed ranges, not exact amounts; conflict flags are heuristic potential overlaps, not accusations; returns are a reproducible timing proxy, not realized profit; nothing here is investment advice.

## API (for agents)
- [MCP endpoint](https://potomacledger.com/mcp): Model Context Protocol over Streamable HTTP. Free = last 90 days, no key. Pro key = full archive (2020–present), generous rate limits. Six read-only tools (search_trades, get_person_trades, get_ticker_activity, list_recent_trades, list_conflicts, aggregates), plus MCP resources and prompts.
- [Agent guide](https://potomacledger.com/AGENTS.md): how to connect and represent the data.

## Data
- [Dataset manifest](https://potomacledger.com/dataset-manifest.json): version, content hash, coverage, and the incremental-sync recipe (full archive via the Pro MCP API).
- [Data dictionary](https://potomacledger.com/data-dictionary.json): every field + per-field/per-year completeness.
- [Pricing](https://potomacledger.com/pricing.md)
- [Data license](https://potomacledger.com/data-license/)

## Human pages
- [Home + subscribe](https://potomacledger.com/) — free weekly newsletter (Congress edition Mondays, Executive edition Tuesdays).
- [Use in AI](https://potomacledger.com/ai/)
- [Membership — The Full Ledger](https://potomacledger.com/members/) ($8/mo or $80/yr charter rate, locked in for life for the first 100 members)
- [Guide to government trading disclosures](https://potomacledger.com/guide/)
- [Issue archive](https://potomacledger.com/issues/)

## Sources
- U.S. House Clerk financial disclosures (disclosures-clerk.house.gov)
- U.S. Senate Electronic Financial Disclosure (efdsearch.senate.gov)
- U.S. Office of Government Ethics — OGE Form 278-T periodic transaction reports