Error type · HTTP 400

A field is not accepted

The call named a field the tool does not have. The answer lists the fields it does have. Remove the field or correct its spelling.

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

Code: unknown_field. Type: https://lender.report/errors/unknown-field/.

{
  "type": "https://lender.report/errors/unknown-field/",
  "title": "A field is not accepted",
  "status": 400,
  "code": "unknown_field",
  "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/.