Countersignatory for Claude.ai

com.countersignatory/mcp

Live spot prices for verified human judgment, sign-off and notarisation.

client:Claude.ai transport:streamable-http tools:3

Install Countersignatory in Claude.ai

Settings → Connectors → Add custom connector

https://countersignatory.com/mcp

Claude on the web takes a remote URL and completes OAuth in the browser. For a packaged server use Claude Desktop or Claude Code instead. Claude.ai docs

What Claude.ai can do once it is connected

countersignatory_quote
countersignatory_register_interest
countersignatory_spot_index

Countersignatory in other clients

Claude Code
Claude Desktop
Cursor
VS Code
Zed
Windsurf
Cline
Gemini CLI
Grok
ChatGPT
LangChain

Countersignatory MCP server