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The Signa MCP (Model Context Protocol) server lets AI agents like Claude, ChatGPT, and Cursor search and analyze trademark data conversationally. Ask a question in plain language and get a structured answer backed by live trademark-office data, without copy-pasting API responses into chat. Every query runs as your organization, scoped exactly like the REST API.

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Connect

Signa runs a hosted MCP server. There’s no package to install and no local process to run, most clients just need one URL: 
https://api.signa.so/mcp
For Claude Code, that’s a single command: 
claude mcp add --transport http signa https://api.signa.so/mcp
Your client opens a browser to sign in, and you’re connected.
Add Signa as a custom connector: Settings → Connectors → Add custom connector, name it Signa, and enter https://api.signa.so/mcp. Save, then click Connect and complete the browser login.Or edit the config file directly and restart Claude Desktop:
{
  "mcpServers": {
    "signa": {
      "url": "https://api.signa.so/mcp",
      "type": "streamableHttp"
    }
  }
}

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Verify the connection

Ask your agent:
“Use Signa to search for NIKE trademarks in the US.”
You should see it call the search_trademarks tool and return live USPTO results.

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Authentication

Most clients use OAuth: your client opens a browser for you to sign in at app.signa.so and approve access, then refreshes the token silently, no key to paste or rotate. For scripts, CI, or headless setups, use a Signa API key as a bearer token instead (Authorization: Bearer sig_YOUR_KEY, or --header "Authorization: Bearer sig_YOUR_KEY" when adding the server). Either way, the tools available to a session depend on its scopes: see Tools & permissions for the full list and what each tool requires.

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What you can ask

Your agent picks the right tools automatically, you don’t need to name them. Edit the brand names, classes, and jurisdictions to fit your work.
“Search for trademarks similar to AURORA in Nice class 9 in the US.”
“Give me the full detail on trademark tm_8kLm2nPq, owners, classes, status, and any proceedings.”
“Who owns the most trademarks in the semiconductor space, and how big are their portfolios?”
“Create a watch for new US filings phonetically similar to ‘BRIGHTLY’ in classes 9 and 42, then show me its status.”
“Which Nice classes should I file in for a company that sells smart home cameras and a subscription app?”
“List TTAB oppositions filed against marks owned by Apple Inc. in the last 12 months.”
For the full tool surface and worked recipes with the REST API, see Tools & permissions and the use-case guides.