# ToolVet Endpoint Check

> ToolVet Endpoint Check is a paid API for AI agents from toolvet.app, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-12).

Validates and vets a paid x402 API endpoint URL, returning its trust score, price, and safety verdict before an agent pays

## Facts

- Endpoint: GET https://toolvet.app/api/v1/check?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/toolvet-endpoint-check-a173d73a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_YzARNuz1V4RI1MBZC9DdY

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability toolvet-endpoint-check-a173d73a
```

Example prompt: Before I pay this x402 endpoint at https://api.weather.example/v1/forecast, check it against ToolVet to make sure it's legitimate — I want to see the trust score and any warnings before proceeding.

## When to prefer this

Use this endpoint whenever an AI agent is about to make a paid x402 API call and needs to verify legitimacy before committing funds. Prefer this over blindly trusting any x402 challenge response, especially for newly discovered or unfamiliar endpoints. Ideal as a mandatory pre-flight check in any agentic payment workflow.

## Known failure modes

- URL not found in ToolVet directory — endpoint may be unlisted or too new
- URL format invalid — must be a fully qualified x402 endpoint URL
- pay_to_matches=false — the endpoint's payment address does not match the vetted listing, indicating potential fraud
- valid_challenge=false — the 402 challenge itself is malformed or suspicious
- Network timeout if the ToolVet service is unavailable
- High warnings array — endpoint listed but flagged for anomalies

## How this service works

The vetted directory of paid APIs and MCP servers for AI agents.

## Output

A JSON object containing the canonical URL, price details (USD amount, network, asset symbol), listing metadata (ID and trust score), a verdict string ('ok' or risk level), a list of warnings, and a boolean indicating whether the pay-to address matches the directory listing and whether the challenge is valid.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "url"
     ],
     "properties": {
      "url": {
       "type": "string",
       "description": "The x402 endpoint URL you are about to pay"
      },
      "method": {
       "enum": [
        "GET",
        "POST"
       ],
       "type": "string",
       "description": "HTTP method of the paid call (default GET)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "url": "https://api.weather.example/v1/forecast",
  "price": {
   "usd": 0.001,
   "network": "eip155:8453",
   "asset_symbol": "USDC"
  },
  "listing": {
   "id": "weather-forecast",
   "trust_score": 91,
   "pay_to_matches": true
  },
  "verdict": "ok",
  "warnings": [],
  "valid_challenge": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/toolvet-endpoint-check-a173d73a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from toolvet.app](https://www.zero.xyz/host/toolvet.app/llms.txt)