MCP server exposing 6 tools for sec-13f.
This URL is a JSON-RPC 2.0 endpoint over HTTP. Issue POST requests with a JSON-RPC body. Browsers and search crawlers land here on GET.
POST https://gateway.pipeworx.io/sec-13f/mcp
Content-Type: application/json
{"jsonrpc":"2.0","id":1,"method":"tools/list"}who_owns — Which institutional managers hold a given US-listed security, ranked by position size — the reverse of every 13F API, which requires you to name the manager first. Give a company name, ticker (e.g. "NVDA") or 9-character CUSIP. Ticker input is resolved through OpenFIGI, not a bulk symbol table. Returns each manager, the value of their position in USD, share count, and the reporting quarter. Answers "who owns NVDA", "which funds hold the most Apple", "institutional ownership of Tesla". Sourced from SEC Form 13F. Where a manager amended a quarter (13F-HR/A), each position is counted once, from the latest filing that reports it.manager_portfolio — Every 13F position reported by one institutional manager, largest first — the classic manager-first view, over the same indexed data. Give the manager name ("Berkshire Hathaway", "Pershing Square"). Returns each holding with value and share count, plus the reported quarter. For what CHANGED since the prior quarter use manager_changes instead.manager_changes — What one institutional manager NEW-ed, EXITED, INCREASED or DECREASED between two 13F quarters — the newsletter primitive: a portfolio snapshot is not news, a change is. Give the manager name; optionally the two report quarters to compare (YYYY-MM-DD, e.g. "2026-03-31"), defaulting to the two most recent quarters loaded for that manager. Returns four ranked lists (new positions, exits, adds, trims) each with issuer, CUSIP, value in both quarters and the dollar delta.security_flows — Net institutional buying or selling of one security across the loaded 13F quarters — total position value and holder count per quarter, plus which managers newly bought, sold out, added to or trimmed that security between the two most recent quarters. Give a company name, ticker or CUSIP. Use for "is institutional ownership of NVDA growing", "who has been buying/selling Tesla".manager_profile — A profile of one institutional manager's 13F book: portfolio concentration (share of value in the top 5 / top 10 positions), turnover between the two most recent loaded quarters, and top positions. Use to characterize a manager's style before targeting them (e.g. for a newsletter) — concentrated vs. diversified, high vs. low turnover. Does NOT include sector/industry exposure: 13F carries no such field, and this pack does not fabricate one.holdings_coverage — What this 13F dataset currently covers: which SEC release windows and reporting quarters are loaded, how many filings and holdings rows are in each, and total size. Use to check freshness and to know which quarters manager_changes/security_flows can actually compare before relying on an ownership answer.Code samples (curl / TypeScript / one-click client install), schemas, and the live playground are on the pack page:
https://pipeworx.io/packs/sec-13f/
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