Developers
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.
Search the register and read any entity or company as JSON. The full contract is the OpenAPI document - import it into a custom GPT as an Action to give ChatGPT typed access. llms.txt is the short version a language model reads.
/v1The same lookups as tool calls. Add the endpoint as a connector in ChatGPT (developer mode) or Claude, no key - a chat sandbox that cannot fetch a URL reaches it this way, because a connector runs on the vendor's side rather than in the sandbox.
/mcpnpx -y mcp-remote https://lei.online/mcpEvery 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.
It is a Traverse database - a free, portable graph engine that works with openCypher and GQL.