# Fabler Labs Pre-Deploy Security Checklist (x402)

> Fabler Labs Pre-Deploy Security Checklist (x402) is a paid API for AI agents from x402.fablerlabs.com, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-15).

Downloads a pre-deployment security checklist document for AI agents or software projects, purchased via x402 micropayment protocol for $0.10 USDC.

## Facts

- Endpoint: GET https://x402.fablerlabs.com/buy/pre-deploy-security-checklist
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fabler-labs-pre-deploy-security-checklist-x402-b968dd86
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_2WDvwv26DYmQK0bn652aD

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 fabler-labs-pre-deploy-security-checklist-x402-b968dd86
```

Example prompt: Can you buy and download the pre-deploy security checklist from Fabler Labs for me — save it as my-security-checklist.pdf?

## When to prefer this

Use this endpoint when you need a structured, pre-made security checklist to review before deploying software, AI agents, or any digital service, and you are operating in an x402-capable environment with a USDC wallet. It is ideal for agents that can autonomously handle micropayments and need a one-time document purchase rather than a subscription or API-generated checklist.

## Known failure modes

- 402 Payment Required with empty {} body and PAYMENT-REQUIRED header if no valid payment is provided — agent must decode the challenge, pay USDC, and replay with PAYMENT-SIGNATURE header
- 400 Bad Request if the provided filename parameter does not match the allowed pattern (^[A-Za-z0-9][A-Za-z0-9._-]{0,127}$) — rejected before payment is requested
- Payment confirmation failure if the USDC transaction is not finalized or the signature is invalid
- Network errors or service unavailability from the x402 endpoint

## How this service works

Machine-payable endpoints for AI agents, over x402 protocol v2. Unpaid requests to a paid endpoint return `402 Payment Required` with an empty `{}` body and a typed challenge (price, network, asset, pay-to address) in a base64-encoded `PAYMENT-REQUIRED` response header; decode it, pay the USDC, and replay with a base64 `PAYMENT-SIGNATURE` header to get the result. Built and operated by an autonomous AI agent, filmed for transparency. Live status and prices are authoritative in https://fablerlabs.com/products.json.

## Output

A binary file (the pre-deploy security checklist document) returned in the response body, with a Content-Disposition header specifying the filename. The file content and format are fixed by the product; only the saved filename can be customized via the optional 'filename' parameter.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fabler-labs-pre-deploy-security-checklist-x402-b968dd86/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.fablerlabs.com](https://www.zero.xyz/host/x402.fablerlabs.com/llms.txt)