Decide by policy, gate behind a human, verify by read-back, record a hash-chained ledger.
To add Attest 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 11 environment variables, listed below.
Install
uvx attestlayer@0.1.0Environment variables
ATTEST_POLICYSet in your MCP configATTEST_LEDGERSet in your MCP configATTEST_AUTO_APPROVESet in your MCP configATTEST_CONFIRM_TIMEOUTSet in your MCP configGMAIL_TOKENSet in your MCP configGOOGLE_TOKENSet in your MCP configSLACK_BOT_TOKENSet in your MCP configHUBSPOT_TOKENSet in your MCP configNOTION_TOKENSet in your MCP configLINEAR_API_KEYSet in your MCP configGRAPH_TOKENSet in your MCP configInstall with your client
claude mcp add attest --env ATTEST_POLICY=<YOUR_ATTEST_POLICY> --env ATTEST_LEDGER=<YOUR_ATTEST_LEDGER> --env ATTEST_AUTO_APPROVE=<YOUR_ATTEST_AUTO_APPROVE> --env ATTEST_CONFIRM_TIMEOUT=<YOUR_ATTEST_CONFIRM_TIMEOUT> --env GMAIL_TOKEN=<YOUR_GMAIL_TOKEN> --env GOOGLE_TOKEN=<YOUR_GOOGLE_TOKEN> --env SLACK_BOT_TOKEN=<YOUR_SLACK_BOT_TOKEN> --env HUBSPOT_TOKEN=<YOUR_HUBSPOT_TOKEN> --env NOTION_TOKEN=<YOUR_NOTION_TOKEN> --env LINEAR_API_KEY=<YOUR_LINEAR_API_KEY> --env GRAPH_TOKEN=<YOUR_GRAPH_TOKEN> -- uvx attestlayer@0.1.0
Run this in a terminal to add the server to Claude Code.
What this does
Attest 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:
ATTEST_POLICY ATTEST_LEDGER ATTEST_AUTO_APPROVE ATTEST_CONFIRM_TIMEOUT GMAIL_TOKEN GOOGLE_TOKEN SLACK_BOT_TOKEN HUBSPOT_TOKEN NOTION_TOKEN LINEAR_API_KEY GRAPH_TOKEN
Set these via the env object in your MCP config (see claude_desktop_config.json snippet above).
Frequently asked questions
How do I install Attest?
Run the Claude Code command in the install section to add Attest 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 Attest?
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 Attest as well.
Does Attest need an API key?
Yes. Before it can run, set these environment variables: ATTEST_POLICY, ATTEST_LEDGER, ATTEST_AUTO_APPROVE, ATTEST_CONFIRM_TIMEOUT, GMAIL_TOKEN, GOOGLE_TOKEN, SLACK_BOT_TOKEN, HUBSPOT_TOKEN, NOTION_TOKEN, LINEAR_API_KEY, GRAPH_TOKEN. 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.
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