Is Signer MCP Server safe to use?

Signer MCP Server has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments.

How do I install Signer MCP Server?

Signer MCP Server supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.

What AI clients work with Signer MCP Server?

Signer MCP Server is compatible with claude-desktop, cursor, claude-code. It uses stdio and http transport.

Is Signer MCP Server actively maintained?

Signer MCP Server is recently maintained — last commit was 68 days ago.

Signer MCP Server

@cryptoapis-io/mcp-signer

MCP server for local transaction signing on EVM, UTXO, Tron, and XRP — no API calls needed

50/wk 0 tools GitHub npm

No known CVEs

No license

Maintained

Last commit 68d ago

Works with most clients

Transport: stdio, http

0 tools

Grade F

Edit this pageView history

Finance

Step 1

Install in your client

Config is the same across clients — only the file and path differ.

Supported in Claude Desktopstdio, http · Node 18+

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "cryptoapis-signer": {
      "args": [
        "-y",
        "@cryptoapis-io/mcp-signer"
      ],
      "command": "npx"
    }
  }
}

Are you the author?

Add this badge to your README to show your security score and help users find safe servers.

Embed in your READMEAbout badges →

[![MCPpedia Score](https://mcppedia.org/api/badge/io-github-cryptoapis-io-mcp-signer)](https://mcppedia.org/s/io-github-cryptoapis-io-mcp-signer)

Read me

What Signer MCP Server does

MCP server for local transaction signing across EVM, UTXO, Tron, and XRP blockchains. No Crypto APIs HTTP calls — signing happens entirely on your machine. No API key required.

Test This Server

Run this in your terminal to verify the server starts. Then let us know if it worked — your result helps other developers.

npx -y '@cryptoapis-io/mcp-signer' 2>&1 | head -1 && echo "✓ Server started successfully"

After testing, let us know if it worked:

Loading README…

Scored, not listed

Why this score

Five weighted categories — click any category to see the underlying evidence.

Score breakdown

50/100across 5 weighted dimensions

How we score →

0255075100

−50

Security

Maintenance

Efficiency

Documentation

Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

No known CVEs.

Checked @cryptoapis-io/mcp-signer against OSV.dev.

Community

Reviews

Be the first to review

Have you used this server?

Share your experience — it helps other developers decide.

How easy was setup?Did it work reliably?How was the documentation?

Frequently Asked Questions

Is Signer MCP Server safe to use?: Signer MCP Server has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments.
How do I install Signer MCP Server?: Signer MCP Server supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.
What AI clients work with Signer MCP Server?: Signer MCP Server is compatible with claude-desktop, cursor, claude-code. It uses stdio and http transport.
Is Signer MCP Server actively maintained?: Signer MCP Server is recently maintained — last commit was 68 days ago.

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MCP Security Weekly

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Community

Discussion

Start a conversation

Ask a question, share a tip, or report an issue.

Has anyone used this with Cursor?How do you handle auth?Any alternatives?

Edit this pageView history

Finance

Step 1

Install in your client

Config is the same across clients — only the file and path differ.

Supported in Claude Desktopstdio, http · Node 18+

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "cryptoapis-signer": {
      "args": [
        "-y",
        "@cryptoapis-io/mcp-signer"
      ],
      "command": "npx"
    }
  }
}

Are you the author?

Add this badge to your README to show your security score and help users find safe servers.

Embed in your READMEAbout badges →

[![MCPpedia Score](https://mcppedia.org/api/badge/io-github-cryptoapis-io-mcp-signer)](https://mcppedia.org/s/io-github-cryptoapis-io-mcp-signer)

Read me

What Signer MCP Server does

MCP server for local transaction signing across EVM, UTXO, Tron, and XRP blockchains. No Crypto APIs HTTP calls — signing happens entirely on your machine. No API key required.

Test This Server

Run this in your terminal to verify the server starts. Then let us know if it worked — your result helps other developers.

npx -y '@cryptoapis-io/mcp-signer' 2>&1 | head -1 && echo "✓ Server started successfully"

After testing, let us know if it worked:

README

@cryptoapis-io/mcp-signer

MCP server for local transaction signing across EVM, UTXO, Tron, and XRP blockchains. No Crypto APIs HTTP calls — signing happens entirely on your machine. No API key required.

Security

Stdio only — no HTTP transport. The server does not listen on any port.
Private keys in tool input — each tool receives privateKey / privateKeys / secret as parameters. Keys are never read from environment variables.
No network calls — all signing is done locally using cryptographic libraries.

Installation

npm install @cryptoapis-io/mcp-signer

Or install all Crypto APIs MCP servers: npm install @cryptoapis-io/mcp

Usage

npx @cryptoapis-io/mcp-signer

Claude Desktop

Add to your Claude Desktop config (~/Library/Application Support/Claude/claude_desktop_config.json on macOS, %APPDATA%\Claude\claude_desktop_config.json on Windows):

{
  "mcpServers": {
    "cryptoapis-signer": {
      "command": "npx",
      "args": ["-y", "@cryptoapis-io/mcp-signer"]
    }
  }
}

Cursor

Add to .cursor/mcp.json (project) or ~/.cursor/mcp.json (global):

{
  "mcpServers": {
    "cryptoapis-signer": {
      "command": "npx",
      "args": ["-y", "@cryptoapis-io/mcp-signer"]
    }
  }
}

MCP Inspector

npx @modelcontextprotocol/inspector npx @cryptoapis-io/mcp-signer

Available Tools

`evm_sign`

Sign an EVM transaction (Ethereum, Ethereum Classic, BSC, Polygon, Avalanche (C-Chain), Arbitrum, Base, Optimism, Tron).

Action	Description
`sign-from-details`	Sign from structured transaction fields (to, value, gasLimit, etc.)
`sign-unsigned-hex`	Sign a pre-built unsigned transaction hex

`utxo_sign`

Sign a UTXO transaction (Bitcoin, Bitcoin Cash, Litecoin, Dogecoin, Dash, Zcash).

Action	Description
`sign-from-details`	Sign from a prepared transaction object (inputs, outputs)
`sign-unsigned-hex`	Sign a raw unsigned transaction hex with input descriptors

`tron_sign`

Sign a Tron transaction using secp256k1 (no TronWeb dependency).

Action	Description
`sign-from-details`	Sign from a transaction object with `raw_data_hex`
`sign-unsigned-hex`	Sign a pre-built unsigned transaction hex

`xrp_sign`

Sign an XRP transaction.

Action	Description
`sign-from-details`	Sign from structured XRP transaction fields
`sign-unsigned-hex`	Sign a pre-built unsigned transaction hex

All tools return signedTransactionHex — ready to broadcast with @cryptoapis-io/mcp-broadcast.

Dependencies

Package	Purpose
`ethers`	EVM transaction signing
`bitcoinjs-lib` + `ecpair` + `tiny-secp256k1`	UTXO transaction signing
`elliptic`	Tron transaction signing (secp256k1)
`xrpl`	XRP transaction signing

License

MIT

Loading README…

Scored, not listed

Why this score

Five weighted categories — click any category to see the underlying evidence.

Score breakdown

50/100across 5 weighted dimensions

How we score →

0255075100

−50

Security

Maintenance

Efficiency

Documentation

Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

No known CVEs.

Checked @cryptoapis-io/mcp-signer against OSV.dev.

Community

Reviews

Be the first to review

Have you used this server?

Share your experience — it helps other developers decide.

How easy was setup?Did it work reliably?How was the documentation?

Frequently Asked Questions

Is Signer MCP Server safe to use?: Signer MCP Server has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments.
How do I install Signer MCP Server?: Signer MCP Server supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.
What AI clients work with Signer MCP Server?: Signer MCP Server is compatible with claude-desktop, cursor, claude-code. It uses stdio and http transport.
Is Signer MCP Server actively maintained?: Signer MCP Server is recently maintained — last commit was 68 days ago.