# 47620 x402 Sign-Check Endpoint

> 47620 x402 Sign-Check Endpoint is a paid API for AI agents from 47620.xyz, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-30).

Validates and confirms a settled x402 USDC micropayment on Solana, returning an ok:true confirmation with associated endpoint metadata.

## Facts

- Endpoint: GET https://47620.xyz/x/sign-check/FoVb1VKPqzXHkPNN5U2vJvuzJ6QnS7xN6m3Yh1yF9xZk?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/47620-x402-sign-check-endpoint-f113798d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_FxkMpwYNvojIZAP1JoxDC

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 47620-x402-sign-check-endpoint-f113798d
```

Example prompt: Check whether my x402 USDC payment just settled correctly for the 47620 sign-check route — I need to confirm the payment went through before the data is released.

## When to prefer this

Use this endpoint when you need to confirm that an x402 USDC micropayment on Solana has been accepted before proceeding with data retrieval. It is the canonical sign-check gate for the 47620 pay-per-call API and is ideal for agents that need to verify payment receipt in a non-custodial, no-signup flow. Prefer this over generic payment status checks when operating within the x402 protocol on Solana.

## Known failure modes

- Payment not yet settled on-chain — returns ok: false or HTTP 402
- Invalid or expired payment token — authentication rejected
- Incorrect HTTP method (must be GET) — 405 Method Not Allowed
- Network congestion causing delayed Solana confirmation — transient failure
- Malformed x402 payment header — 400 Bad Request

## How this service works

Non-custodial x402 payment gateway on Solana (1% on-chain fee) plus a pay-per-call Solana data API for agents: token price, account balances, tx lookup, trending DEX pairs, network health. No signup, no API key — pay USDC per call.

## Output

Returns a JSON object with ok: true on successful payment confirmation, along with the matched endpoint path (/x/sign-check/...) and an optional data object. If payment has not settled or is invalid, ok will be false or an error is returned.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "ok"
   ],
   "properties": {
    "ok": {
     "type": "boolean"
    }
   },
   "description": "JSON payload returned after a settled x402 payment. Exact keys depend on the route; every paid route returns ok:true on success."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "data": {},
  "endpoint": "/x/sign-check/FoVb1VKPqzXHkPNN5U2vJvuzJ6QnS7xN6m3Yh1yF9xZk"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/47620-x402-sign-check-endpoint-f113798d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from 47620.xyz](https://www.zero.xyz/host/47620.xyz/llms.txt)