Signa

so.signaPublished by signa.soOfficial publisherv1.0.0Updated Nov 3, 2026

Search, screen and monitor trademarks across USPTO, EUIPO, WIPO, UKIPO and more with one API.

VerifiedStreamable HTTPWeb executable

Overview

Signa's hosted MCP server (api.signa.so), published by signa.so; OAuth sign-in or API key required; Streamable HTTP.

No AI overview yet: these facts come from the registry entry and the server itself.

Publisher
signa.so
Endpoint
api.signa.so
Documentation
docs.signa.so
Last checked

Installation

In SourceWeft

  1. Open Signa in the dashboard and add it to a workspace.
  2. Connect the required credentials. They are stored privately and never shown on public pages.
  3. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/so.signa%2Fsigna/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config. The client completes OAuth sign-in on first connect.

{
  "mcpServers": {
    "signa": {
      "type": "http",
      "url": "https://api.signa.so/mcp"
    }
  }
}

README

[Signa]

Signa MCP server

The global trademark API.

Search, screen and monitor trademarks across USPTO, EUIPO, WIPO, UKIPO and more with one API.

Website · Docs · Pricing · Agent skills

About

Signa is the global trademark API, built for developers and AI agents. This hosted MCP server lets Claude, ChatGPT, Cursor and other MCP clients search and read trademark records from the world's registers, including USPTO, EUIPO, WIPO and UKIPO, in one format.

What you can do

  • Search trademarks by name, class, owner, status and office, with fuzzy, phonetic and lookalike-character matching. Each result shows why it matched.
  • Read the full record: status, goods and services, classes, owners, attorneys, events and proceedings.
  • Research owners and their portfolios, with registry owners linked to the companies behind them.
  • Look up attorneys and law firms and the marks they represent.
  • Find the Nice classes for a product or service, and check goods and services wording.
  • Check office rules such as deadlines, prosecution steps and opposition periods.
  • Monitor marks with watches and alerts (API key).

Who it's for

Trademark attorneys and paralegals, brand and legal teams, founders checking a name, and developers building trademark tools.

The data

Records come straight from the official registries and are kept current. Every record carries its source date, and Signa publishes which offices it covers. Ask Signa which offices are live, or see the docs.

Connect

Server URL: https://api.signa.so/mcp (Streamable HTTP, hosted, nothing to install)

Sign in with your Signa account (OAuth). For scripts and headless clients, use an API key instead. Free to start, no card required, with simple, public pricing.

Claude Code

bash
claude mcp add --transport http signa https://api.signa.so/mcp

Claude.ai and Claude Desktop: Settings → Connectors → Add custom connector, paste https://api.signa.so/mcp, sign in. Or add Signa from the Claude directory.

ChatGPT (plans with MCP connectors): add a connector with https://api.signa.so/mcp and choose OAuth.

Cursor (.cursor/mcp.json)

json
{ "mcpServers": { "signa": { "url": "https://api.signa.so/mcp" } } }

VS Code (.vscode/mcp.json)

json
{ "servers": { "signa": { "type": "http", "url": "https://api.signa.so/mcp" } } }

API key instead of OAuth (any client that accepts headers)

json
{ "headers": { "Authorization": "Bearer sig_YOUR_KEY" } }

Clients that only run local (stdio) servers

bash
npx mcp-remote https://api.signa.so/mcp

Example prompts

  • Is BRIGHTLY already registered for software in the US, EU or UK? Check classes 9 and 42.
  • Which Nice classes should a company selling smart home cameras and a subscription app file in?
  • Find marks similar to AURORA in class 9 at EUIPO, including ones that sound alike.
  • Show the full record for US trademark 1939139: status, owner, classes and recent events.
  • List Nike's trademarks at UKIPO with their current status.
  • List TTAB oppositions filed against marks owned by Apple Inc. in the last 12 months.
  • How long is the opposition period at EUIPO, and when does it end for this application?

Tools

Tools are grouped below; the full list with scopes is in Tools & permissions.

GroupWhat it doesAccess
SearchFind marks by name, class, owner, status and officeOAuth or API key
TrademarksFull records, events and proceedings for a mark; batch lookupsOAuth or API key
Owners and entitiesRegistry owners, the companies behind them, and their portfoliosOAuth or API key
Attorneys and firmsAttorneys and firms of record, their clients and marksOAuth or API key
ProceedingsOppositions, cancellations and other proceedingsOAuth or API key
ReferenceOffices, jurisdictions, status codes, Nice classes, goods and services, design codes, deadline and opposition rulesOAuth or API key
MonitoringCreate, pause and manage watches; alerts, webhooks and eventsAPI key
AccountPlan, pricing and usageUsage needs an API key

With OAuth, the server exposes read-only tools. Write tools only manage your own watches and need an API key. Signa never files applications or changes official records.

FAQ

Is it free? Free to start, no card required. Paid plans add volume; see pricing.

Which offices does it cover? Major registers including USPTO, EUIPO, WIPO and UKIPO, with more added regularly. Ask Signa "which offices do you cover?" for the live list.

Can it change anything? Signed in with OAuth, it is read-only. With an API key it can also create and manage your own watches. It never files applications or touches official records.

Where does the data come from? From the official trademark registries. Every record shows its source date.

Is this legal advice? No. Signa is a research tool. Results don't establish legal clearance or replace advice from a qualified attorney.

This repository

The server is hosted by Signa; its code is not in this repository. This repository holds the public listing for MCP directories and registries: this README, server.json for the official MCP Registry, a Cursor plugin (.cursor-plugin/plugin.json and mcp.json) and the logo.

Support: [email protected] · signa.so/contact

Signa Technologies Ltd

Source: README.md at commit 8258059

Tools

0
This server asks you to sign in, so SourceWeft could not read its tools without an account and has not indexed them. What a connected account sees can depend on that account and its permissions.

Version history

1
  1. v1.0.0LatestNov 3, 2026

Score

85% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listed15 pts

    Answer tools/list without a credential, or ship a package that starts in a sandbox without one.

  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts
  • License10 pts

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