Bitcoin-anchored, tamper-evident audit log for AI agents — record, disclose and verify actions.
To add Touchstone to Claude, run the install command below or copy the ready-made config for Claude Code, Claude Desktop, Cursor and VS Code further down. Restart your client after adding it and its tools show up in your next conversation. It needs 6 environment variables, listed below.
Install
npx -y @touchstone-cv/mcp@0.3.1Environment variables
TOUCHSTONE_RECORDERSet in your MCP configTOUCHSTONE_SUBJECTSet in your MCP configTOUCHSTONE_API_KEYSet in your MCP configTOUCHSTONE_SIGNING_KEYSet in your MCP configTOUCHSTONE_KEY_FILESet in your MCP configTOUCHSTONE_BASE_URLSet in your MCP configInstall with your client
claude mcp add touchstone --env TOUCHSTONE_RECORDER=<YOUR_TOUCHSTONE_RECORDER> --env TOUCHSTONE_SUBJECT=<YOUR_TOUCHSTONE_SUBJECT> --env TOUCHSTONE_API_KEY=<YOUR_TOUCHSTONE_API_KEY> --env TOUCHSTONE_SIGNING_KEY=<YOUR_TOUCHSTONE_SIGNING_KEY> --env TOUCHSTONE_KEY_FILE=<YOUR_TOUCHSTONE_KEY_FILE> --env TOUCHSTONE_BASE_URL=<YOUR_TOUCHSTONE_BASE_URL> -- npx -y @touchstone-cv/mcp@0.3.1
Run this in a terminal to add the server to Claude Code.
What this does
Touchstone exposes a set of tools to Claude over the Model Context Protocol. After you add it to claude_desktop_config.json (snippet above) and restart Claude Desktop, those tools become callable inside any conversation.
Requirements
This server needs the following environment variables to be set before it can run:
TOUCHSTONE_RECORDER TOUCHSTONE_SUBJECT TOUCHSTONE_API_KEY TOUCHSTONE_SIGNING_KEY TOUCHSTONE_KEY_FILE TOUCHSTONE_BASE_URL
Set these via the env object in your MCP config (see claude_desktop_config.json snippet above).
Frequently asked questions
How do I install Touchstone?
Run the Claude Code command in the install section to add Touchstone to Claude Code, or copy the ready-made config for your client from the install section on this page. Restart your client afterwards and the tools appear in your next conversation.
Which clients work with Touchstone?
This page carries setup and config for Claude Code, Claude Desktop, Cursor and VS Code. Any other MCP client that accepts a standard server config can connect to Touchstone as well.
Does Touchstone need an API key?
Yes. Before it can run, set these environment variables: TOUCHSTONE_RECORDER, TOUCHSTONE_SUBJECT, TOUCHSTONE_API_KEY, TOUCHSTONE_SIGNING_KEY, TOUCHSTONE_KEY_FILE, TOUCHSTONE_BASE_URL. They go in the env block of your MCP config.
Imported from the Official MCP Registry. The details above come from the registry entry; the maker can claim this listing to correct them, add docs, and see its traffic.
Is this your MCP server?
Claim this listing to see its traffic, fix details yourself, and skip the review queue on future updates.
Add this badge to your README
Show visitors this server is listed in the ClaudeRules directory. The badge links straight to this listing.
[](https://clauderules.net/mcp/cv-touchstone-touchstone)<a href="https://clauderules.net/mcp/cv-touchstone-touchstone" target="_blank" rel="noopener noreferrer"><img src="https://clauderules.net/api/badge/cv-touchstone-touchstone" alt="Listed on clauderules.net" /></a>More AI MCP servers
GitHub
Connect AI assistants to GitHub - manage repos, issues, PRs, and workflows through natural language.
Serena MCP: the IDE for your agent
A powerful toolkit for coding, providing semantic retrieval and editing capabilities.
MCP Toolbox for Databases
MCP Toolbox for Databases enables your agent to connect to your database.
Inbox Zero
Search Gmail and Outlook, save drafts, manage email rules, and view email stats.