**Super-investor 13F portfolios, Congress trades, insider buying and market conditions as MCP tools. Free, no account, no API key. Ask with plain names.** Stockslash tracks ~80 institutional investors (Buffett, Burry, Ackman, Pabrai, Tepper, Loeb and more), the members of Congress who trade stocks, and company insider filings — as **27 tools**. Pass natural names like `investor: "Buffett"`, `stock: "Apple"` or `member_name: "Pelosi"`; no CIK or ticker lookup needed. **Connect:** add `https://stockslash.com/mcp` as a remote MCP server, no authentication — Claude (Customize → Connectors → Add custom connector), ChatGPT (Developer mode), Cursor, VS Code, Claude Code. Step-by-step and one-click installs: [stockslash.com/mcp-api](https://stockslash.com/mcp-api). Try asking: - *"What did Warren Buffett buy and sell last quarter?"* - *"Which top investors own Nvidia, and who added to it?"* - *"Compare Bill Ackman's and Michael Burry's portfolios."* - *"Which stocks are company insiders buying right now?"* - *"What has Nancy Pelosi traded recently?"* - *"Is the stock market expensive right now?"* ## Start here — one call answers most questions - **`analyze_investor`** — one fund: portfolio value and 8-quarter trend, top 10 holdings, recent trades, style; flags funds that stopped filing. - **`analyze_stock`** — one stock: which funds hold it, who bought or sold last quarter, recent insider trades. - **`compare_investors`** — two funds side by side: shared stocks, stocks only one owns, opposite moves. - **`get_market_conditions`** — is the market expensive, and how many of 3 recession warning signs are on, with what happened next in the past. - **`get_whos_buying`** — are top funds, insiders and Congress buying or selling more than usual, each vs its own past. ## Investors `get_super_investors` · `get_investor_current_holdings` · `get_investor_fund_value` · `get_investor_fund_value_history` · `get_fund_activity` · `get_fund_distribution` ## Stocks `get_stock_holders` · `get_stock_activity` (latest complete quarter, with buy/sell counts) · `get_ownership_statistics` ## Insiders and Congress `get_insider_trades` · `get_insider_summary` (payroll-plan buys not counted) · `get_latest_insider_buys` · `get_top_insider_stocks` · `get_congress_trades` (options marked call/put) · `get_congress_consensus` ## Market and rankings `get_filings_buy_status` · `get_filings_sell_status` · `get_stocks_funds_are_adding` · `get_sp_stocks_by_holders` (stocks held by the most funds) · `get_ownership_statistics_home` · `get_latest_filings_updates` · `get_latest_quarter` ## Built for agents Every result has `structuredContent` matching the tool's `outputSchema`, a `resolved` block showing which fund or stock matched, and a `source` block with the Stockslash page for those figures and a ready-made `cite_as` line. Streamable HTTP, protocol 2025-06-18 / 2025-03-26 / 2024-11-05. ## Data SEC 13F holdings (quarterly, filed up to 45 days after quarter end), SEC Form 4 insider trades, STOCK Act disclosures, and FRED / Shiller / FINRA market data. Public filing data, not investment advice ([terms](https://stockslash.com/imprint)). **Free. 200 requests per 15 minutes per visitor.**

MCP readiness

B · 86/100

Readiness is how fully this listing follows its protocol and how it behaved in our probes over 30 days. It is shown for reference and does not move it in search. Search order and leaderboards use the separate quality grade (here C+, 71.9/100), which weighs availability, conformance, p95 speed and descriptor. How the two differ

Valid MCP handshake	10/10	initialize and tools/list both answered.
Live MCP endpoint	25/25	Endpoint answers the MCP initialize handshake (1879 ms).
Protocol revision	6/10	Speaks MCP 2025-06-18, 2 revision(s) behind 2026-07-28.
Signed descriptor	n/a	No MCP standard defines a signed server descriptor.
Uptime (30 days)	15/15	30/30 probes succeeded over 30 days (100%).
Tool declaration	10/10	Lists 28 tool(s) with descriptions.
Verified identity	5/10	Publisher declared (repository, package or homepage); claim this listing to verify domain control.
Freshness + modern flags	4/5	seen in a source within 7 days.
Auth declaration	2/5	Declares credential scheme: smithery_api_key.

Applicable criteria total 90 points, scaled to 100.

Responsiveness: Responsive (1879 ms; bands ≤2.5 s, ≤5 s, ≤8 s, slower; penalty only).

Measured 2026-11-11.

Nine criteria, the same as the A2A readiness score, read from our daily MCP probe (initialize + tools/list) and 30-day probe history. No MCP standard defines a signed server descriptor, so that criterion is n/a and the other 90 points are scaled to 100. Grades: A>=90, B>=75, C>=60, D>=40, F<40. Display only: search order uses the quality grade.

Compared with peers

Against 53,039 reachable MCP servers in our daily snapshot (2026-11-12 06:46 UTC). Display only; it does not change search order.

Readiness: Higher than 80% of peers; This listing 86 · peer median 81
Latency: Faster than 19% of peers; This listing 654 ms · peer median 326 ms

Where it loses the most points, and how to win them back

Verified identity −5 — Claim the listing and prove control of its domain.
Now: Publisher declared (repository, package or homepage); claim this listing to verify domain control.
Protocol revision −4 — Support the current protocol revision.
Now: Speaks MCP 2025-06-18, 2 revision(s) behind 2026-07-28.
Auth declaration −3 — State how to authenticate (an auth scheme, or that none is needed).
Now: Declares credential scheme: smithery_api_key.

How many agent tools actually work · All statistics

Listed in

Directories this entry was found in.

smithery since 2026-06-04 ↗

How to connect

MCP endpoint (streamable-http)

https://server.smithery.ai/stockslash/sec-13f/mcp

JSON-RPC initialize probe

curl -X POST https://server.smithery.ai/stockslash/sec-13f/mcp \
  -H 'Content-Type: application/json' \
  -H 'Accept: application/json, text/event-stream' \
  -d '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{}}'

Homepage

https://stockslash.com

Listed at (smithery)

https://stockslash.com