# ToolFit + MCPCheck (remote · api.youraitools.co)

Audit, pin and diff agent tool lists; preflight and watch remote MCP servers. Free tier; x402.

- Trust score: 68/100 (medium)
- Change this week: +3
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- remote · `api.youraitools.co`: 68/100 (this document), [markdown](https://verifymcp.io/servers/co-youraitools-toolfit/toolfit-mcp.md), [page](https://verifymcp.io/servers/co-youraitools-toolfit/toolfit-mcp)

## Channel facts

- Endpoint: `https://api.youraitools.co/toolfit/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `0.1.1`

## 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 2026-11-05.

- **Endpoint Security**: 57/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - Authorisation check failed: no authorisation is required to call this server, and it exposes a tool marked destructive (watch_cancel).
  - 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**: 65/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 1319 tokens (~219/item across 6 items; 6 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 40/100
  - Stability observed for 12 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.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 6 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 7 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.

## Install

### How do I install the ToolFit + MCPCheck MCP server?

ToolFit + MCPCheck is a hosted endpoint at https://api.youraitools.co/toolfit/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-toolfit 'https://api.youraitools.co/toolfit/mcp'
```

### Cursor

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

### VS Code

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

### Codex

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

### opencode

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

### OpenClaw

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

### Hermes

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

### Netclaw

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

### Vellum

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

### Other

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

### 2026-11-04 (score 68, +1)

No change was recorded against any check on this day. Stability & Change Management went from 33 to 37. That category is still filling its 30-day observation window: 10 days of observed history at the previous scan, 11 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-11-02 (score 67, +1)

No change was recorded against any check on this day. Stability & Change Management went from 27 to 30. That category is still filling its 30-day observation window: 8 days of observed history at the previous scan, 9 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-31 (score 66, +1)

No change was recorded against any check on this day. Stability & Change Management went from 20 to 23. That category is still filling its 30-day observation window: 6 days of observed history at the previous scan, 7 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-29 (score 65, +1)

No change was recorded against any check on this day. Stability & Change Management went from 13 to 17. That category is still filling its 30-day observation window: 4 days of observed history at the previous scan, 5 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-27 (score 64, +1)

No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-25 (score 63, 0)

- [functional improvement] Stability: unverified → 0.03

### 2026-10-24 (score 63)

First indexed and scored.

## MCP tools (6)

### `audit_tools` (~312 tokens)

Audit a tool list (ToolFit)

Check the tool definitions an agent loads, before they cost tokens or fail: estimated tokens per tool, schema errors per provider (OpenAI, Anthropic, Gemini, Bedrock, MCP; add openai_strict for strict mode) with JSON paths and fixed definitions, tool pairs models will confuse with fix hints, basic poisoning patterns, a grade and a pin (set_id) for diff_tools. Pass "tools" (array in any common format) or "url" (public remote MCP server; tools are listed, never called). level "lite" returns the summary only. Free: 20 calls/day per IP (shared with diff_tools), then $0.003 lite / $0.01 full via x402 or credits.

Input parameters:

- `level` (string): lite = summary only; full (default) = every issue, fixed definitions, pair hints
- `providers` (array): Providers to check (default openai, anthropic, gemini, bedrock, mcp; add openai_strict for Structured Outputs strict mode). GET: comma list.
- `tools` (array): Tool definitions: MCP tools/list entries, OpenAI {type:"function",function:{...}}, Anthropic {name,description,input_schema}, Gemini functionDeclarations or Bedrock toolSpec. Max 500.
- `url` (string): Public remote MCP server URL (Streamable HTTP, https), e.g. https://api.youraitools.co/mcp/hub. ToolFit only lists its tools.

### `diff_tools` (~269 tokens)

Diff a tool list against a pin (ToolFit)

What changed in a tool list since you approved it? Compares "tools" or "url" now with "pin" (set_id from audit_tools/diff_tools) or "baseline" (earlier definitions). Each change is labeled breaking (removed tool or param, new required param, type or enum removal), suspicious (new text with injection patterns or hidden characters), review (description, title, annotation or new tool) or additive; descriptions come with before/after text and a word diff. Returns a new pin. Free: 20 calls/day per IP (shared with audit_tools), then $0.002 via x402 or credits.

Input parameters:

- `baseline` (array): Instead of pin: the earlier tool definitions themselves.
- `pin` (string): A pin (set_id "ts_..." from an earlier ToolFit call) to compare against.
- `tools` (array): Tool definitions: MCP tools/list entries, OpenAI {type:"function",function:{...}}, Anthropic {name,description,input_schema}, Gemini functionDeclarations or Bedrock toolSpec. Max 500.
- `url` (string): Public remote MCP server URL (Streamable HTTP, https), e.g. https://api.youraitools.co/mcp/hub. ToolFit only lists its tools.

### `check_mcp_server` (~165 tokens)

Preflight a remote MCP server (MCPCheck)

Does this remote MCP server work, and is it worth connecting or paying for? Sends initialize and tools/list only (never calls a tool) and reports reachability, protocol version, sign-in method (OAuth protected-resource metadata), x402 payment terms if it asks for payment, latency, tool count and token cost, provider compatibility, poisoning patterns in tools and server instructions, issues and a grade A-F, plus a pin for later diffs. https public hosts only. Free: 10 checks/day per IP, then $0.005 via x402 or credits.

Input parameters:

- `url` (string, required): Public remote MCP server URL (Streamable HTTP, https), e.g. https://api.youraitools.co/mcp/hub. ToolFit only lists its tools.

### `watch_mcp_server` (~237 tokens)

Watch a remote MCP server for changes (ToolFit)

Hosted watch (paid only; this MCP call validates and returns how to pay): ToolFit re-audits a public remote MCP server every 24 h ($0.25) or 6 h ($0.60) for 30 days and POSTs an HMAC-SHA256 signed JSON webhook to your https endpoint when its tools/list fingerprint or grade changes, or it goes unreachable or recovers. Pay at POST /v1/watch or /v1/watch/6h with x402 or a credits key; the response has watch_id and the signing secret (shown once).

Input parameters:

- `every` (string): Check interval: 24h (default, $0.25 per 30 days) or 6h ($0.60 per 30 days).
- `url` (string, required): Public remote MCP server URL (Streamable HTTP, https), e.g. https://api.youraitools.co/mcp/hub. ToolFit only lists its tools.
- `webhook` (string, required): Your https endpoint (public host, port 443) that receives the signed JSON change notifications. A query string is allowed.

### `watch_status` (~98 tokens)

Status of a ToolFit watch

Free: state (active, expired, cancelled), interval, expiry, next check, last result (pin, grade, score, tool count) and webhook delivery counters for a watch. Needs watch_id and the secret returned when it was created.

Input parameters:

- `secret` (string, required): The whsec_... secret returned once when the watch was created
- `watch_id` (string, required): watch_id (w_...) returned by POST /v1/watch

### `watch_cancel` (~77 tokens)

Cancel a ToolFit watch

Free: cancel a watch (no further checks or webhooks; not refunded). Needs watch_id and the secret returned when it was created.

Input parameters:

- `secret` (string, required): The whsec_... secret returned once when the watch was created
- `watch_id` (string, required): watch_id (w_...) returned by POST /v1/watch

## Diagnostics

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

## Score history

- 2026-11-05: 68
- 2026-11-04: 68
- 2026-11-03: 67
- 2026-11-02: 67
- 2026-11-01: 66
- 2026-10-31: 66
- 2026-10-30: 65
- 2026-10-29: 65
- 2026-10-28: 64
- 2026-10-27: 64
- 2026-10-26: 63
- 2026-10-25: 63
- 2026-10-24: 63

## Common questions

### What is the ToolFit + MCPCheck MCP server?

ToolFit + MCPCheck is an MCP server listed in the public MCP registry as co.youraitools/toolfit. Audit, pin and diff agent tool lists; preflight and watch remote MCP servers. Free tier; x402. This page covers its hosted endpoint (https://api.youraitools.co/toolfit/mcp).

### Is the ToolFit + MCPCheck MCP server safe to use?

ToolFit + MCPCheck 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 ToolFit + MCPCheck MCP server expose?

ToolFit + MCPCheck exposes 6 tools: audit_tools, diff_tools, check_mcp_server, watch_mcp_server, watch_status, watch_cancel. Their descriptions and schemas cost roughly 1,158 tokens of context every time the server is loaded.

### Does the ToolFit + MCPCheck MCP server require authentication?

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

### Is the ToolFit + MCPCheck MCP server still maintained?

ToolFit + MCPCheck is still listed as active in the MCP registry. We last reached this channel on 5 November 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/toolfit/mcp
- Website: https://api.youraitools.co/toolfit/
- Changelog RSS feed: https://verifymcp.io/servers/co-youraitools-toolfit/toolfit-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/co-youraitools-toolfit/toolfit-mcp.json
- HTML version of this page: https://verifymcp.io/servers/co-youraitools-toolfit/toolfit-mcp