# SignCheck (remote · api.youraitools.co)

Pre-sign safety check for agent wallets: tx, EIP-712, EIP-7702, x402. By Crypto Money Maker

- Trust score: 68/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-10-22

## Components

- remote · `api.youraitools.co`: 68/100 (this document), [markdown](https://verifymcp.io/servers/co-youraitools-signcheck/signcheck-mcp.md), [page](https://verifymcp.io/servers/co-youraitools-signcheck/signcheck-mcp)
- npm · `@agentgate-builder/signcheck`: 62/100, [markdown](https://verifymcp.io/servers/co-youraitools-signcheck/agentgate-builder-signcheck.md), [page](https://verifymcp.io/servers/co-youraitools-signcheck/agentgate-builder-signcheck)

## Channel facts

- Endpoint: `https://api.youraitools.co/signcheck/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `0.2.0`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, 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 2026-10-22.

- **Endpoint Security**: 74/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one.
  - HTTPS is enforced; there's no plaintext access path.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 57/100
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 395 tokens (~395/item across 1 items; 1 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 0/100
  - Stability not yet verified: not enough scan history yet (needs a 30-day window).
- **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.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 1 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 2 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

**Unverified: 1 category.** A category scored 0 because we could not verify it: authentication we do not have, an unreachable endpoint, or not enough scan history. We only credit what we can confirm.

## Install

### How do I install the SignCheck MCP server?

SignCheck is a hosted endpoint at https://api.youraitools.co/signcheck/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add --transport http co-youraitools-signcheck 'https://api.youraitools.co/signcheck/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "co-youraitools-signcheck": {
      "url": "https://api.youraitools.co/signcheck/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "co-youraitools-signcheck": {
      "type": "http",
      "url": "https://api.youraitools.co/signcheck/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.co-youraitools-signcheck]
url = "https://api.youraitools.co/signcheck/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "co-youraitools-signcheck": {
      "type": "remote",
      "url": "https://api.youraitools.co/signcheck/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add co-youraitools-signcheck --url 'https://api.youraitools.co/signcheck/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  co-youraitools-signcheck:
    url: "https://api.youraitools.co/signcheck/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "co-youraitools-signcheck": {
      "Transport": "http",
      "Url": "https://api.youraitools.co/signcheck/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add co-youraitools-signcheck -t streamable-http -u 'https://api.youraitools.co/signcheck/mcp'
```

### Other

```json
{
  "mcpServers": {
    "co-youraitools-signcheck": {
      "type": "http",
      "url": "https://api.youraitools.co/signcheck/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## 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.

### 2026-10-22 (score 68)

First indexed and scored.

## MCP tools (1)

### `check_signature` (~334 tokens)

Is it safe to sign this?

Call BEFORE your agent signs or sends anything from a wallet. Decodes a transaction, an EIP-712 typed-data request (Permit, Permit2, EIP-3009 USDC authorizations, Seaport orders), an EIP-7702 delegation or an x402 payment (402 terms + payload) into plain English and returns SAFE / CAUTION / DANGER with risk flags (unlimited approvals, setApprovalForAll, fake USDC domains, x402 overpay or wrong payTo, OFAC SDN counterparties). Free preview tier (offline). The paid x402 endpoint /v1/check adds reasons, on-chain facts (spender is a wallet or contract, token metadata) and an eth_call simulation.

Input parameters:

- `authorization` (object): EIP-7702 authorization {address (delegate contract), chainId, nonce}
- `chain` (string): base (default), ethereum, base-sepolia or a chain id
- `payment_payload` (object|string): x402 payment you are about to send: PAYMENT-SIGNATURE / X-PAYMENT (base64) or JSON
- `payment_required` (object|string): x402 402 terms: the PAYMENT-REQUIRED header (base64) or JSON {accepts:[…]}
- `tx` (object): Transaction to send: {"to":"0x…","data":"0x…","value":"0","from":"0x…"} (from enables simulation)
- `typed_data` (object): EIP-712 request {domain, types, primaryType, message} as passed to eth_signTypedData_v4

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/co-youraitools-signcheck/signcheck-mcp#diagnostics

## Score history

- 2026-10-22: 68

## Common questions

### What is the SignCheck MCP server?

SignCheck is an MCP server listed in the public MCP registry as co.youraitools/signcheck. Pre-sign safety check for agent wallets: tx, EIP-712, EIP-7702, x402. By Crypto Money Maker. This page covers its hosted endpoint (https://api.youraitools.co/signcheck/mcp).

### Is the SignCheck MCP server safe to use?

SignCheck scores 68 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the SignCheck MCP server expose?

SignCheck exposes 1 tool: check_signature. Their descriptions and schemas cost roughly 334 tokens of context every time the server is loaded.

### Does the SignCheck MCP server require authentication?

No. We connected to SignCheck without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the SignCheck MCP server still maintained?

SignCheck is still listed as active in the MCP registry. We last reached this channel on 22 October 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- Remote endpoint: https://api.youraitools.co/signcheck/mcp
- Website: https://youraitools.co/
- Changelog RSS feed: https://verifymcp.io/servers/co-youraitools-signcheck/signcheck-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/co-youraitools-signcheck/signcheck-mcp.json
- HTML version of this page: https://verifymcp.io/servers/co-youraitools-signcheck/signcheck-mcp