ToolFit + MCPCheck
REMOTE · API.YOURAITOOLS.CO
Audit, pin and diff agent tool lists; preflight and watch remote MCP servers. Free tier; x402.
Available components
Last scanned (1 hour ago)
Scores higher than 53% of remote servers
Reachable. Last reached 5 Nov 2026.
Category Security
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. How we score → Why this is hard to score →
Endpoint Security57
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- Authorisation check failed: no authorisation is required to call this server, and it exposes a tool marked destructive (watch_cancel). See how to fix → View diagnostics → Fail
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- HSTS check failed: the Strict-Transport-Security header is absent. See how to fix → View diagnostics → Fail
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability65
- AI-judged instruction clarity (excellent).Pass
- 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. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management40
- Stability observed for 12 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 6 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 7 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 4 Nov 26 +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.
- 2 Nov 26 +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.
- 31 Oct 26 +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.
- 29 Oct 26 +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.
- 27 Oct 26 +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.
- 25 Oct 26 0
- Stability: unverified → 0.03 ▲ functional
- 24 Oct 26 63
First indexed and scored.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 5 Nov 2026 · Probed https://api.youraitools.co/toolfit/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=api.youraitools.co | CN=WE1,O=Google Trust Services,C=US | 21 Oct 2026 | 19 Jan 2027 | ECDSA 256 | ECDSA-SHA256 | 16ce85edf8b8fd540ee8bd4da64828ec |
| SANs: api.youraitools.co | ||||||
| CN=WE1,O=Google Trust Services,C=US (CA) | CN=GTS Root R4,O=Google Trust Services LLC,C=US | 13 Dec 2023 | 20 Feb 2029 | ECDSA 256 | ECDSA-SHA384 | 7ff31977972c224a76155d13b6d685e3 |
| CN=GTS Root R4,O=Google Trust Services LLC,C=US (CA) | CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE | 15 Nov 2023 | 28 Jan 2028 | ECDSA 384 | SHA256-RSA | 7fe530bf331343bedd821610493d8a1b |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of api.youraitools.co. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| co. | present | 7786 | 8 | Verified |
| youraitools.co. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://api.youraitools.co/toolfit/mcp | Verified | 200 | |
| http (plaintext) | http://api.youraitools.co/toolfit/mcp | HTTPS enforced | 301 | https://api.youraitools.co/toolfit/mcp |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
audit_tools Audit a tool list (ToolFit) ~312
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.
| Name | Type | Req | Description |
|---|---|---|---|
| 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. |
No output schema declared.
No examples provided.
check_mcp_server Preflight a remote MCP server (MCPCheck) ~165
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.
| Name | Type | Req | Description |
|---|---|---|---|
| url | string | yes | Public remote MCP server URL (Streamable HTTP, https), e.g. https://api.youraitools.co/mcp/hub. ToolFit only lists its tools. |
No output schema declared.
No examples provided.
diff_tools Diff a tool list against a pin (ToolFit) ~269
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.
| Name | Type | Req | Description |
|---|---|---|---|
| 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. |
No output schema declared.
No examples provided.
watch_cancel Cancel a ToolFit watch ~77
Free: cancel a watch (no further checks or webhooks; not refunded). Needs watch_id and the secret returned when it was created.
| Name | Type | Req | Description |
|---|---|---|---|
| secret | string | yes | The whsec_... secret returned once when the watch was created |
| watch_id | string | yes | watch_id (w_...) returned by POST /v1/watch |
No output schema declared.
No examples provided.
watch_mcp_server Watch a remote MCP server for changes (ToolFit) ~237
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).
| Name | Type | Req | Description |
|---|---|---|---|
| every | string | – | Check interval: 24h (default, $0.25 per 30 days) or 6h ($0.60 per 30 days). |
| url | string | yes | Public remote MCP server URL (Streamable HTTP, https), e.g. https://api.youraitools.co/mcp/hub. ToolFit only lists its tools. |
| webhook | string | yes | Your https endpoint (public host, port 443) that receives the signed JSON change notifications. A query string is allowed. |
No output schema declared.
No examples provided.
watch_status Status of a ToolFit watch ~98
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.
| Name | Type | Req | Description |
|---|---|---|---|
| secret | string | yes | The whsec_... secret returned once when the watch was created |
| watch_id | string | yes | watch_id (w_...) returned by POST /v1/watch |
No output schema declared.
No examples provided.
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.
remote · api.youraitools.co
claude mcp add --transport http co-youraitools-toolfit 'https://api.youraitools.co/toolfit/mcp'
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.