# Open Trademarks

> Free trademark search across the US, EU and Israeli registers. One name, three registers, one of three verdicts: exact live mark, similar live marks, or no live match found. A register search, not legal advice.

## For agents

- MCP server (Streamable HTTP, no auth): https://mcp.opentrademarks.org/mcp with tools check_trademark and search_trademarks
- Server card: https://mcp.opentrademarks.org/.well-known/mcp/server-card.json
- HTTP API: https://api.opentrademarks.org/v1/check?name=...&goods=...&classes=... (JSON, or text/markdown through the Accept header); OpenAPI at https://api.opentrademarks.org/openapi.json
- Every answer carries the date each register was read. Do not tell a user a name is clear unless the check ran in this conversation and the registers were read today or yesterday.

## Pages

- Check: https://opentrademarks.org/
- Registers and read dates: https://opentrademarks.org/registers
- Docs: https://opentrademarks.org/docs
- Is my business name trademarked?: https://opentrademarks.org/learn/is-my-business-name-trademarked
- Trademark or domain: which do you need first?: https://opentrademarks.org/learn/trademark-vs-domain
- Nice classes for a business built with AI: https://opentrademarks.org/learn/nice-classes-for-a-business-built-with-ai
- Check a trademark in Israel: https://opentrademarks.org/learn/check-a-trademark-in-israel
- What a similar live mark means: https://opentrademarks.org/learn/what-a-similar-trademark-means
- What a clean trademark search means, and does not: https://opentrademarks.org/learn/what-a-clean-trademark-search-means
- Open data: https://opentrademarks.org/open-data (files at https://data.opentrademarks.org/<register>/<yyyy-mm>/marks.csv.gz once a register is cleared; none is yet)
- About: https://opentrademarks.org/about