# x402 Trust & Discovery API — Endpoint Safety Guard

> x402 Trust & Discovery API — Endpoint Safety Guard is a paid API for AI agents from gkyf2bs3b4p35hwwg5zzsnejeu.srv.us, paid per call via x402, $0.02/call, status down (last checked 2026-10-03).

Pre-purchase safety and reputation check for x402/MPP endpoints, returning a go/test/do-not-pay verdict before any payment is attempted

## Facts

- Endpoint: GET https://gkyf2bs3b4p35hwwg5zzsnejeu.srv.us/v1/endpoint?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: down
- Last checked: 2026-10-03
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-trust-discovery-api-endpoint-safety-guard-a6775b54
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_C0xEjDZgy4kCJ8tWMxkw1

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-trust-discovery-api-endpoint-safety-guard-a6775b54
```

Example prompt: Before I pay it, check whether https://someapi.example.com/v1/data is safe to call — I'm holding an EIP-3009 credential and want to know if it'll even work, and whether the endpoint has a clean onchain history.

## When to prefer this

Use this endpoint when an AI agent or buyer needs to vet an x402 or MPP endpoint before committing any payment — especially when credential compatibility is uncertain (EIP-3009 vs Circle Gateway), the endpoint source is unfamiliar, or onchain settlement history is needed without triggering an actual transaction. Prefer this over generic blockchain explorers or registries when you need a single actionable verdict rather than raw chain data.

## Known failure modes

- URL not found or not an x402 endpoint — endpoint may return an unknown/unregistered status
- Network timeout if the target endpoint is unreachable for inspection
- Invalid or malformed URL input returns a validation error
- Endpoint not yet indexed — new endpoints may lack settlement history
- Credential type not recognized — unsupported credential identifiers return an error

## How this service works

Independent pre-purchase safety and reputation checks for x402 and MPP endpoints, plus keyless onchain data on Base. Accepts BOTH EIP-3009 and Circle Gateway credentials — only 141 of 788 Base-payable resources do, and a single-credential buyer is locked out of 53.8% of this market on one rail or 28.3% on the other. GET /v1/guard?url=&credential= answers whether the credential you carry can pay a given endpoint at all, before you try. Searching this market for "is this API endpoint a scam" returns registries and explorers but no dedicated service; that gap is what /v1/guard fills, inspecting an endpoint WITHOUT paying it and returning a go / test-with-minimum / do-not-pay verdict backed by onchain settlement history.

## Output

A JSON response containing a safety verdict (go / test-with-minimum / do-not-pay), credential compatibility status for EIP-3009 and Circle Gateway rails, onchain settlement history data from Base, and reputation signals about the queried x402 endpoint — all returned without making any payment to the target endpoint.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "url": {
   "type": "string",
   "description": "Full URL of the x402 resource to look up."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {}
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-trust-discovery-api-endpoint-safety-guard-a6775b54/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from gkyf2bs3b4p35hwwg5zzsnejeu.srv.us](https://www.zero.xyz/host/gkyf2bs3b4p35hwwg5zzsnejeu.srv.us/llms.txt)