# Agent Tools Preflight Batch URL Checker

> Agent Tools Preflight Batch URL Checker is a paid API for AI agents from agent-tools-7936.onrender.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-10).

Checks a batch of URLs to determine which are live and payable versus dead, helping agents avoid calling broken or inaccessible endpoints

## Facts

- Endpoint: GET https://agent-tools-7936.onrender.com/preflight/batch?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-10
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agent-tools-preflight-batch-url-checker-05811ccc
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_XIUk4sThr0HUyUKkOxDt6

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 agent-tools-preflight-batch-url-checker-05811ccc
```

Example prompt: Before I pay to call any of these API endpoints, can you run a preflight batch check on them and tell me which ones are live and payable versus dead — starting with https://edgar.apitoll.cloud/v1/edgar/filings?

## When to prefer this

Use this endpoint when an AI agent needs to verify one or more API URLs before committing to a paid call or citation — especially in agentic workflows where calling a dead endpoint wastes money or produces incorrect output. Prefer this over generic uptime monitors when you specifically need to know if an endpoint is 'payable' (returns a valid x402 or API response) versus merely reachable by ping.

## Known failure modes

- URL that is temporarily slow may be incorrectly marked DEAD
- Batch input with malformed URLs may return partial results or errors
- Rate limiting or network issues on the probe side could cause false DEAD verdicts
- No input URL provided returns a validation error

## How this service works

Primary-source tools for AI agents: verify before you pay, cite, or repeat.

## Output

Returns a JSON object with a 'best' field pointing to the top-recommended live URL, and a 'results' array where each entry contains a 'verdict' field indicating whether that URL is 'PAYABLE' (live and accessible) or 'DEAD' (unreachable or broken).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "url": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "best": "https://edgar.apitoll.cloud/v1/edgar/filings",
  "results": [
   {
    "verdict": "PAYABLE"
   },
   {
    "verdict": "DEAD"
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agent-tools-preflight-batch-url-checker-05811ccc/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agent-tools-7936.onrender.com](https://www.zero.xyz/host/agent-tools-7936.onrender.com/llms.txt)