# x402 PriceGap PoC Quote3 Endpoint

> x402 PriceGap PoC Quote3 Endpoint is a paid API for AI agents from x402-pricegap-poc.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-21).

Security research proof-of-concept endpoint demonstrating x402 price-binding vulnerabilities; not a production service

## Facts

- Endpoint: GET https://x402-pricegap-poc.vercel.app/quote3?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-pricegap-poc-quote3-endpoint-886a76f8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Ee2wuumFfyqPsv9woqqr-

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 x402-pricegap-poc-quote3-endpoint-886a76f8
```

Example prompt: Can you hit the /quote3 endpoint on the x402 price-gap proof-of-concept site to demonstrate the price-binding vulnerability?

## When to prefer this

Only appropriate for security researchers specifically investigating x402 protocol price-binding vulnerabilities. Do not use in production pipelines, automated agents, or any context other than deliberate security research. This is not a real data service.

## Known failure modes

- Endpoint may be taken down or unavailable as it is a temporary PoC deployment
- Payment of $0.01 USDC may be charged even for failed or empty responses
- Response schema is undefined and may change without notice
- x402 payment flow may fail if wallet or facilitator is misconfigured

## How this service works

Security research test endpoint (x402 price-binding PoC). Not a real service; do not use.

## Output

Returns a proof-of-concept response demonstrating x402 price-binding behavior or vulnerability; exact schema is unspecified and intended for security research purposes only, not production use.

## Request schema (JSON Schema)

```json
{
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-pricegap-poc-quote3-endpoint-886a76f8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-pricegap-poc.vercel.app](https://www.zero.xyz/host/x402-pricegap-poc.vercel.app/llms.txt)