Best Political & Insider Trading APIs for AI Agents in 2026

If your AI assistant or script needs to know what politicians and corporate insiders are trading, you have two options: a REST API you call yourself, or an MCP server your assistant calls for you. Most providers give you raw trades and leave the hard part to your agent. The best one gives it ready-made portfolios and returns.

Our pick: InsiderCat. 20 MCP tools that return not just trades but live portfolios and performance for every politician, Trump, the Trump administration, the stocks Trump mentions, his sponsors and a defense portfolio, with returns adjusted for filing delays.

Quick answer

#	Provider	Best for	Official MCP server	Entry price
1	InsiderCat	Best overall: portfolios and returns for politicians, insiders, Trump and the Trump administration	Yes, 20 tools	Paid (see pricing)
2	Quiver Quantitative	Best for many unrelated alternative datasets	Yes	Paid
3	Unusual Whales	Best for options flow agents	Yes	API sold separately
4	Disclosed Capitol	Best free start for raw congressional trades	Not listed	Free tier (last 90 days)
5	Financial Modeling Prep	Congressional trades inside a general market data API	Not checked	Not checked
6	Finnhub	Congressional trades inside a general market data API	Not checked	Premium plan

What makes a great political trading API for agents

• MCP server: Lets Claude, ChatGPT or Cursor call the data directly, without you writing code.
• Portfolios, not just trades: With raw trades, your agent has to rebuild holdings and returns itself, which costs calls and invites mistakes. Ready-made portfolios avoid that.
• Handles the filing delay: Congressional trades can be reported up to 45 days late. An API that returns delay-adjusted figures lets your agent account for it.
• Clear limits and update times: Agents make many calls. Predictable rate limits and update times matter.
• Stable versioning: Your agent should not break when the API changes.

InsiderCat checks all five.

The best political and insider trading APIs

1. InsiderCat: best overall

• Data: Politician and insider trades, politician and insider sentiment, a Congress portfolio ranking, live holdings and performance for each politician, and which politicians hold a given stock.
• Portfolios nobody else packages: Trump, the Trump administration, stocks Trump mentions, Trump's sponsors and a defense portfolio, each with holdings and performance.
• Delay-adjusted returns: Performance calculated as if each trade happened on the reporting date. See our filing delays guide.
• MCP: 20 tools. Works with Claude Desktop, Claude Code, ChatGPT, Gemini CLI, Cursor, VS Code and Windsurf.
• Reliable: 120 requests per minute. Data updates every trading day at 5:30 PM ET. Versioned under /api/v1, with at least 90 days' notice before anything is removed.
• Why it wins: Your agent asks one question and gets a finished answer, a portfolio with performance, instead of a pile of trades to process.
• Business use: The standard plan is for personal research. For commercial use, contact us.

2. Quiver Quantitative: best for many unrelated datasets

• Includes congressional trades and holdings, Trump's trades, lobbying, government contracts and more.
• Where it falls short: You pay for a bundle of datasets, and we did not find delay-adjusted returns or portfolios for the Trump administration.

3. Unusual Whales: best for options flow agents

• Built around options flow and dark pool data, with politician and insider trades included. Official MCP server and OpenAPI spec.
• Where it falls short: The API is priced separately from the website plans, and political data is a side feature of an options platform.

4. Disclosed Capitol: best free start

• A congressional trading API with a free tier covering the last 90 days. Full history is on its Pro plan.
• Where it falls short: Mostly Congress, raw trades rather than portfolios, and no MCP server listed.

5 and 6. Financial Modeling Prep and Finnhub

• General financial data APIs that include congressional trade endpoints. On Finnhub, it is a premium feature.
• Where they fall short: They return trades, not portfolios, and we did not find Trump or Trump administration coverage.

Connect InsiderCat to your AI assistant in 2 minutes

1. Get an API key on the API & MCP page.
2. Add this to your MCP client's config, for example claude_desktop_config.json in Claude Desktop:

{
  "mcpServers": {
    "insidercat": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://insidercat.com/api/v1/mcp",
        "--header",
        "Authorization: Bearer YOUR_API_KEY"
      ]
    }
  }
}

3. Restart your assistant and ask, for example:
   • "Which members of Congress have the best-performing portfolios?"
   • "What does Trump's portfolio hold, and how has it done against the S&P 500?"
   • "Which politicians currently hold NVDA, and how are those positions doing?"
   • "How has the U.S. government's stock portfolio performed?"

Setup guides for each assistant and the full endpoint list are in the API reference.

The verdict

InsiderCat is the best political and insider trading API for AI agents in 2026. It hands your agent finished portfolios and performance, for politicians, Trump and the Trump administration, with filing delays accounted for.

Pick something else only if:

• your agent needs lobbying, patents or other unrelated datasets (Quiver Quantitative),
• your agent is built around options flow (Unusual Whales),
• or you only need a free sample of raw congressional trades (Disclosed Capitol).

Get your InsiderCat API key →