Settlement assurance for a completed x402 payment on Base or Solana
Settlement assurance for a completed x402 payment on Base or Solana: confirm the transaction succeeded (0x hash or base58 signature), match the USDC transfer to an expected wallet and amount, format a receipt, and optionally audit the issuing endpoint - as one 0-100 scored report with a verdict.
Not tested: has real-world effectsour last check, 2026-09-24
0 of 0checks answered this week
n/amedian answer time
$0.03listed price per call
n/aprice it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://quartermaster.surewhynot.app/v1/settlement-assurance
| Category | Code and developer |
|---|---|
| Provider host | quartermaster.surewhynot.app |
| Networks | eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
We never call tools that send, buy, move money or file anything, not even without paying.
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"amount": "0.001",
"hash": "0x06be01596be1cb68d9b12a33946d2228a82eeb31016ab237825cec547017095f",
"payTo": "0xc2a3...4083",
"resource": "https://api.example.com/paid-endpoint"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"amount": {
"description": "Optional: assert the USDC amount (human decimal)",
"type": "string"
},
"hash": {
"description": "Base transaction hash of the settlement",
"pattern": "^0x[0-9a-fA-F]{64}$",
"type": "string"
},
"payTo": {
"description": "Optional: assert USDC reached this wallet",
"type": "string"
},
"resource": {
"description": "Optional: also audit the x402 endpoint that issued the challenge",
"type": "string"
}
},
"required": [
"hash"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}