Free Trademark API publishes trademark documentation that both people and coding agents can consume without a special parser.
This site is the production surface: HTML for readers, Markdown and
/llms.txt for agents, and a Worker deployment on Cloudflare.
What you can do here
Read the docs
Start with Getting Started for the shortest path from a browser or an agent to a working request.
Call the API
The Search API documents the HTTP interface for looking up a mark by text, serial number, or owner.
Feed an agent
For agents covers /llms.txt, per-page Markdown, and how
to keep a tool grounded on this site instead of scraped HTML.
Who it is for
- Product and legal operators who need a stable, searchable explanation of trademark lookup fields without opening a PDF.
- Engineers wiring a search, knockout, or watch flow into an app.
- Coding agents that should quote a canonical Markdown page instead of guessing from a rendered layout.
Source of truth
Every discoverable page has:
- an HTML route for humans
- a Markdown alternate (append
.mdto the path, or use the page action) - inclusion in
/llms.txtand/llms-full.txt
If the HTML and the Markdown disagree, treat the Markdown as the contract the API and agents should follow.