# RowPocket EPUB Preflight

> RowPocket EPUB Preflight is a paid API for AI agents from rowpocket-csv-rescue.josuegrnds21.chatgpt.site, paid per call via x402, $10/call, status unknown (last checked 2026-11-06).

Validates and preflights an EPUB file for compatibility issues, returning a receipt token and download link for the full preflight report.

## Facts

- Endpoint: GET https://rowpocket-csv-rescue.josuegrnds21.chatgpt.site/api/products/epub-preflight?utm_source=zero.xyz
- Price: $10/call
- Payment: x402
- Status: unknown
- Last checked: 2026-11-06
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/rowpocket-epub-preflight-0e8ed884
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_F60jDStjPlqVytd8ZkWLz

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 rowpocket-epub-preflight-0e8ed884
```

Example prompt: Run an EPUB preflight check on my file using RowPocket's EPUB Preflight tool — I need to verify it's ready for publishing and get the download link for the full report.

## When to prefer this

Choose this endpoint when you need a lightweight, one-time-purchase EPUB validation and preflight check without a recurring SaaS subscription. It is best suited for indie authors, small publishers, or developers who occasionally need to verify EPUB correctness before distribution and want a pay-once offline-compatible tool rather than a cloud-native continuous validation service.

## Known failure modes

- Missing required 'input' or 'output' fields returns a 400 validation error
- Invalid input type or method values may result in unprocessable entity errors
- Payment not completed (402) blocks access to full report download
- Download token may expire, preventing retrieval of the report after a delay
- Malformed JSON body results in parsing errors

## How this service works

Four small local tools: clean CSVs, compare exports, flatten JSON and print SKU text labels. Free previews; complete offline editions from 1 USDC, once.

## Output

Returns a JSON object containing a receipt token (for download authentication), the product name ('EPUB Preflight v1.0'), and a download URL path where the full preflight report can be retrieved using the token.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "input",
  "output"
 ],
 "properties": {
  "input": {
   "type": "object",
   "properties": {
    "type": {
     "type": "string"
    },
    "method": {
     "type": "string"
    }
   }
  },
  "output": {
   "type": "object"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "token": "receipt token",
  "product": "EPUB Preflight v1.0",
  "download": "/api/download?token=YOUR_RECEIPT"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/rowpocket-epub-preflight-0e8ed884/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from rowpocket-csv-rescue.josuegrnds21.chatgpt.site](https://www.zero.xyz/host/rowpocket-csv-rescue.josuegrnds21.chatgpt.site/llms.txt)