API referencev2026.9.8openapi.json
GET/clearanceSearch

Trademark clearance / similarity check

Find existing marks similar to a proposed mark, ranked by similarity. Optionally scope to an international class. A first-pass signal, not legal advice.

Parameters

ParamDescription
markqueryrequiredProposed marke.g. nyke
classqueryInternational class to scope toe.g. 25
limitquery—e.g. 20

Responses

200Ranked similar marks
400Missing mark
500Clearance failed

Try it