Developers

Build on the LEI register

Everything this site shows, a machine can read. A REST API for search and records, an MCP endpoint for agents, and the whole ownership graph as one portable graph database - all of it open, with no account and no key.

REST API

Search the register and read any entity or company as JSON. The full contract is the OpenAPI document; llms.txt is the short version a language model reads.

Base URL
/v1

Agents (MCP)

The same lookups as tool calls, for an agent that works with the Model Context Protocol.

Endpoint
/mcp

The ownership graph

Every reported LEI-to-LEI ownership relationship as one portable graph database - openCypher- and GQL-compatible. Query the whole register at once instead of walking it record by record over the API.

Download the graphRebuilt every night.
Built
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Size
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Companies
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Relationships
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SHA-256
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Opening it

It is a Traverse database - a free, portable graph engine that works with openCypher and GQL.