# AgentTools API Health Check

> AgentTools API Health Check is a paid API for AI agents from agenttools-hub.vercel.app, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-02).

Probes a GET endpoint multiple times and returns status codes plus latency statistics (min/avg/max) to verify API responsiveness before committing to real calls.

## Facts

- Endpoint: GET https://agenttools-hub.vercel.app/api/v1/dev/api-health-check?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agenttools-api-health-check-98879006
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_tHUwUPTqSKiJfiNoPbS46

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 agenttools-api-health-check-98879006
```

Example prompt: Before I start using that new API I found on x402 Bazaar, can you probe its GET endpoint at https://example.com/api/data about 5 times to check whether it's actually responding and how fast it is?

## When to prefer this

Use this endpoint when an agent needs to quickly verify that a third-party API is live and performant before making paid calls or building an automation around it. Especially valuable when evaluating APIs discovered on marketplaces like x402 Bazaar where quality is unknown. Prefer this over manual testing or expensive trial calls — at $0.002 USDC it is cheaper than a failed downstream API call.

## Known failure modes

- Target URL is unreachable or DNS fails — endpoint returns error or timeout statistics
- Target URL returns non-2xx status codes consistently — reported in results but not an error itself
- Timeout too short for slow endpoints — all runs may report timeouts
- Invalid or malformed URL provided — likely returns a validation error
- Rate limiting by the target server — may cause inconsistent status codes across runs

## How this service works

Probe a GET endpoint several times and report status codes and latency statistics (min/avg/max). The cheap way for an agent to verify an API — for example one found on the x402 Bazaar — responds before spending real money calling it. Use this when an agent needs to status and latency stats — test an API before relying on it.

## Output

Returns HTTP status codes observed across test runs along with latency statistics including minimum, average, and maximum response times, giving the agent a clear picture of endpoint health and performance before committing to paid or automated usage.

## 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": "GET endpoint"
      },
      "runs": {
       "type": "number",
       "description": "Test requests"
      },
      "timeoutMs": {
       "type": "number",
       "description": "Timeout per request (ms)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agenttools-api-health-check-98879006/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agenttools-hub.vercel.app](https://www.zero.xyz/host/agenttools-hub.vercel.app/llms.txt)