# EVM Wallet Signer (npm · mcp-wallet-signer)

Route EVM transactions to browser wallets (MetaMask, etc.) for signing via EIP-6963

- Trust score: 79/100 (medium)
- Change this week: +33
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-03

## Components

- npm · `mcp-wallet-signer`: 79/100 (this document), [markdown](https://verifymcp.io/servers/nikicat-mcp-wallet-signer/mcp-wallet-signer.md), [page](https://verifymcp.io/servers/nikicat-mcp-wallet-signer/mcp-wallet-signer)

## Channel facts

- Registry: `npm`
- Package: `mcp-wallet-signer`
- Version: `0.1.3`
- Transport: `stdio`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-08-03.

- **Supply Chain Security**: 87/100
  - No malware found by supply-chain analysis.
  - Only part of the dependency tree could be resolved (120 of 124), so this covers what we could see, not the whole tree.
  - No install/post-install scripts declared.
  - Only part of the dependency tree could be resolved (120 of 124), so this covers what we could see, not the whole tree.
- **Provenance & Transparency**: 97/100
  - Source repository is publicly reachable at the declared URL.
  - Cryptographically verified build provenance (signed, bound to nikicat/mcp-wallet-signer).
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 74 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 77/100
  - AI-judged instruction clarity (excellent).
  - Tool/resource definitions use about 586 tokens (~117/item across 5 items; 5 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 23/100
  - Stability observed for 7 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### Claude

```bash
claude mcp add nikicat-mcp-wallet-signer -- npx -y mcp-wallet-signer
```

### Codex

```bash
codex mcp add nikicat-mcp-wallet-signer -- npx -y mcp-wallet-signer
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "nikicat-mcp-wallet-signer": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "mcp-wallet-signer"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add nikicat-mcp-wallet-signer --command npx --arg -y --arg mcp-wallet-signer
```

### Hermes

```yaml
mcp_servers:
  nikicat-mcp-wallet-signer:
    command: "npx"
    args: ["-y", "mcp-wallet-signer"]
```

### Other

```json
{
  "mcpServers": {
    "nikicat-mcp-wallet-signer": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-wallet-signer"
      ]
    }
  }
}
```

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-08-02 (score 79, +58)

- [security improvement] Known CVEs: unverified → partial
- [security improvement] Install scripts: unverified → pass
- [security improvement] Provenance: unverified → pass
- [security improvement] Malware scan: unverified → pass
- [security] Stability: Stability not yet verified: not enough scan history yet (needs a 30-day window).
- [security] The attested source repository moved: nikicat/mcp-wallet-signer
- [functional improvement] Schema quality: unverified → excellent
- [functional improvement] License: unverified → pass
- [functional improvement] Dependency health: unverified → partial
- [functional improvement] Stability: unverified → 0.20
- [functional improvement] Maintenance: unverified → pass
- [functional improvement] MCP protocol: unverified → pass
- [functional] Licence: MIT

### 2026-08-01 (score 21, −7)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-31 (score 28, −18)

- [security regression] Malware scan: pass → unverified

### 2026-07-27 (score 46)

First indexed and scored.

## MCP tools (5)

### `connect_wallet` (~85 tokens)

Connect to a browser wallet and get the wallet address. IMPORTANT: This tool opens a browser window where the user must approve the connection. Tell the user to switch to their browser window to approve. This tool blocks until the user acts or the request times out (5 min).

Input parameters:

- `chainId` (number): Chain ID to connect to (default: 1 for Ethereum mainnet)

### `send_transaction` (~186 tokens)

Send a transaction (ETH transfer or contract call) via the connected browser wallet. IMPORTANT: This tool opens a browser window where the user must review and approve the transaction. Tell the user to switch to their browser window to approve. This tool blocks until the user acts or the request times out (5 min).

Input parameters:

- `chainId` (number): Chain ID (default: 1)
- `data` (string): Contract call data, hex encoded (optional)
- `gasLimit` (string): Gas limit (optional, will be estimated if not provided)
- `maxFeePerGas` (string): Max fee per gas in wei (optional)
- `maxPriorityFeePerGas` (string): Max priority fee per gas in wei (optional)
- `to` (string, required): Recipient address (0x...)
- `value` (string): Amount in wei to send (optional for contract calls)

### `sign_message` (~98 tokens)

Sign an arbitrary message using personal_sign. IMPORTANT: This tool opens a browser window where the user must approve the signature. Tell the user to switch to their browser window to approve. This tool blocks until the user acts or the request times out (5 min).

Input parameters:

- `address` (string): Address to sign with (uses connected address if not specified)
- `chainId` (number): Chain ID
- `message` (string, required): Message to sign

### `sign_typed_data` (~159 tokens)

Sign EIP-712 typed data. IMPORTANT: This tool opens a browser window where the user must review and approve the signature. Tell the user to switch to their browser window to approve. This tool blocks until the user acts or the request times out (5 min).

Input parameters:

- `address` (string): Address to sign with
- `chainId` (number): Chain ID
- `domain` (object, required): EIP-712 domain (name, version, chainId, verifyingContract, salt)
- `message` (object, required): Message data to sign
- `primaryType` (string, required): Primary type name
- `types` (object, required): Type definitions (e.g., { Person: [{ name: 'name', type: 'string' }] })

### `get_balance` (~58 tokens)

Get the ETH balance of an address. Does not require browser interaction - reads directly from the blockchain.

Input parameters:

- `address` (string, required): Address to get balance for (0x...)
- `chainId` (number): Chain ID (default: 1)

## Diagnostics

Captured diagnostic sections: Provenance, Dependencies. The full working is on the page: https://verifymcp.io/servers/nikicat-mcp-wallet-signer/mcp-wallet-signer#diagnostics

## Score history

- 2026-08-03: 79
- 2026-08-02: 79
- 2026-08-01: 21
- 2026-07-31: 28
- 2026-07-30: 46
- 2026-07-28: 46
- 2026-07-27: 46

## Links

- npm package: https://www.npmjs.com/package/mcp-wallet-signer
- Socket report: https://socket.dev/npm/package/mcp-wallet-signer
- Repository: https://github.com/nikicat/mcp-wallet-signer
- Changelog RSS feed: https://verifymcp.io/servers/nikicat-mcp-wallet-signer/mcp-wallet-signer/changelog.xml
- Changelog JSON feed: https://verifymcp.io/servers/nikicat-mcp-wallet-signer/mcp-wallet-signer/changelog.json
- HTML version of this page: https://verifymcp.io/servers/nikicat-mcp-wallet-signer/mcp-wallet-signer