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Browse filings in the Terminal. A free API key is created when you sign up: call the REST API with it, or connect Claude, Cursor or Codex through the MCP server. Below, one real 13F row through each.

Example

You

“How many Apple shares did Berkshire Hathaway hold at the end of Q2 2026?”

get_institution_holdings

{ "institution": "Berkshire Hathaway" }

-> 27 positions, 13F-HR, period 2026-06-30

Agent

Berkshire Hathaway held 227,917,808 Apple shares worth $65.95B on Jun 30, 2026: 22.04% of the portfolio it reported, unchanged from the prior quarter.

$ claude mcp add ko-sec-data --transport http https://mcp.ko.io/mcp

SourceSEC EDGAR13F-HRBerkshire Hathaway, period 2026-06-30Filing

API calls a day: 200
rows per request: 500
MCP tools: 24

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