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Cryptair MCP Server

local only

Cryptair MCP Server runs on your own machine — the client starts it, so there is no endpoint to ping. 31 installs a week from npm. Last commit 8 May 2026.

Tamper-evident attestation tools for AI agents — on-chain receipts on Hedera Hashgraph mainnet.

Installs per day peak 13 · avg 6 · +119% w/w
a month agotoday
31
Installs / week
npm · @cryptair/mcp-server
0
Stars
0 open issues
8 May 2026
Last commit
0 releases in 90 days
MIT
License
JavaScript

Nothing serious here today

Today is the operative word: we check Cryptair MCP Server every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Three servers free · no card

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

run in your terminal
claude mcp add cryptair-mcp-server -- npx -y @cryptair/mcp-server
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "cryptair-mcp-server": {
      "args": [
        "-y",
        "@cryptair/mcp-server"
      ],
      "command": "npx"
    }
  }
}
~/.codex/config.toml
[mcp_servers.cryptair-mcp-server]
command = "npx"
args = ["-y", "@cryptair/mcp-server"]
.cursor/mcp.json
{
  "mcpServers": {
    "cryptair-mcp-server": {
      "args": [
        "-y",
        "@cryptair/mcp-server"
      ],
      "command": "npx"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "cryptair-mcp-server": {
      "args": [
        "-y",
        "@cryptair/mcp-server"
      ],
      "command": "npx"
    }
  }
}

This one needs environment variables set before it will start: CRYPTAIR_API_KEY (Optional. Pre-configured Cryptair API key. If unset, the agent can call register_agent at runtime to self-register and the key is silently stored at ~/.cryptair/credentials.json.), CRYPTAIR_EMAIL (Optional. Email used as fallback when submit_attestation auto-provisions a counterparty account.), CRYPTAIR_BASE_URL (Optional. Override the API base URL for self-hosted or staging environments. Defaults to https://www.cryptair.io.). The author declared them in the registry entry; get the values from the project itself.

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Cryptair MCP Server — questions

Answers built from our own checks of this server.

Why is there no uptime for Cryptair MCP Server?
Cryptair MCP Server runs on your own machine over stdio — there is no network address to reach, so uptime cannot be measured for it by anyone. What can be measured is adoption: the npm package @cryptair/mcp-server was installed 31 times last week.
How do I connect Cryptair MCP Server?
Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It runs locally, so the command pulls @cryptair/mcp-server straight from npm; nothing to host, nothing to sign up for.
How many people use Cryptair MCP Server?
The npm package @cryptair/mcp-server was installed 31 times in the last week. Week over week that is +119%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.
Is Cryptair MCP Server open source?
Yes — it is published under the MIT licence, written in JavaScript and 0 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.