Error type · HTTP 401

That key was not recognised

The key sent is not on record: it may be mistyped or may have been revoked. Check it, or leave it out to use the no-key limits.

By Research desk, The Lender Report · Updated November 8, 2026

Code: key_not_recognized. Type: https://lender.report/errors/key-not-recognized/.

{
  "type": "https://lender.report/errors/key-not-recognized/",
  "title": "That key was not recognised",
  "status": 401,
  "code": "key_not_recognized",
  "detail": "One plain sentence that names the field and what is accepted."
}

All the types are on the errors page. The API and MCP docs are at /developers/.