Payment Receipt/Settlement Proof
Payment receipt and settlement proof for x402 and agent payments, by Liquid Logic X. Input: a Base USDC tx hash (optional memo). Output: JSON proof recorded onchain on Arc mainnet (proofId, from/to/amount, Arc tx, refId) plus a public verify link anyone can check. $0.02 USDC on Base, charged only when a proof is returned. Your paying wallet must be the tx sender or recipient. Liquid Logic X also records proofs on Tempo mainnet. Site: https://liquidlogicx.com
Offering
- Provider
- audit.liquidlogicx.com
- Method
- GET
- Offering type
- Api Endpoint
- Transport type
- http
- Category
- Blockchain And Crypto
- Delivery
- Not provided
- Pricing model
- Not provided
- x402 version
- 2
Endpoint context
- URL
https://audit.liquidlogicx.com/api/prove- MIME type
- application/json
- First seen
- 2026-10-16T01:50:38.788Z
- Last seen
- Tags
- payment-receipt, settlement-proof, verify, X402, USDC
Payment pricing
x402 payment terms are the authoritative price for calling this endpoint.
- Payment option 1
- 0.02 USDC
Atomic price: 20000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Raw x402 terms
[
{
"scheme": "exact",
"network": "eip155:8453",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "20000",
"payTo": "0x147991A1c25e78f6D9225d2dBA61eD93A6158c7b"
}
]Observed health
- Status
- Healthy
- Latest latency
- 101 ms
- Average latency
- 297 ms
- HTTP status
- 402
- Last checked
- Reachability
- 100% over 14 checks
Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.
Input schema
{
"type": "object",
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"type": "string",
"enum": [
"GET"
]
},
"queryParams": {
"type": "object",
"properties": {
"txHash": {
"type": "string",
"pattern": "^0x[0-9a-fA-F]{64}$",
"description": "Base mainnet (eip155:8453) transaction hash of a USDC payment (must contain a Transfer from Base USDC 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913). Your paying wallet must be its from or to."
},
"memo": {
"type": "string",
"maxLength": 64,
"pattern": "^[\\x20-\\x7E]*$",
"description": "Optional plain-text note stored on-chain with the proof (printable ASCII, max 64 chars). Public."
}
},
"required": [
"txHash"
]
}
},
"required": [
"type",
"method"
],
"additionalProperties": false
}Output schema
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"memo": {
"description": "Optional plain-text note stored on-chain with the proof (printable ASCII, max 64 chars). Public.",
"maxLength": 64,
"pattern": "^[\\x20-\\x7E]*$",
"type": "string"
},
"txHash": {
"description": "Base mainnet (eip155:8453) transaction hash of a USDC payment (must contain a Transfer from Base USDC 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913). Your paying wallet must be its from or to.",
"pattern": "^0x[0-9a-fA-F]{64}$",
"type": "string"
}
},
"required": [
"txHash"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"arc": {
"properties": {
"chain": {
"const": "eip155:5042",
"type": "string"
},
"contract": {
"const": "0x1de52cbc4490a7873ef007e51cb91a5b374facb1",
"type": "string"
},
"txHash": {
"description": "Arc tx that recorded the proof",
"pattern": "^0x[0-9a-fA-F]{64}$",
"type": [
"string",
"null"
]
}
},
"required": [
"chain",
"contract",
"txHash"
],
"type": "object"
},
"memo": {
"type": "string"
},
"proofId": {
"description": "1-based position in the SettlementProofs registry on Arc",
"type": [
"integer",
"null"
]
},
"recordedAt": {
"type": "string"
},
"refId": {
"description": "Settlement ID on Arc = keccak256(srcTxHash, payee, amountUSDC)",
"pattern": "^0x[0-9a-fA-F]{64}$",
"type": "string"
},
"source": {
"properties": {
"amountUsdc": {
"description": "Decimal USDC, e.g. \"0.05\"",
"type": "string"
},
"chain": {
"const": "eip155:8453",
"type": "string"
},
"from": {
"pattern": "^0x[0-9a-fA-F]{40}$",
"type": "string"
},
"timestamp": {
"description": "Base block time (UTC)",
"type": "string"
},
"to": {
"pattern": "^0x[0-9a-fA-F]{40}$",
"type": "string"
},
"txHash": {
"pattern": "^0x[0-9a-fA-F]{64}$",
"type": "string"
}
},
"required": [
"chain",
"txHash",
"from",
"to",
"amountUsdc",
"timestamp"
],
"type": "object"
},
"status": {
"enum": [
"recorded",
"existing"
],
"type": "string"
},
"verifyUrl": {
"description": "Public verifier page on proofs.liquidlogicx.com",
"type": "string"
}
},
"required": [
"proofId",
"status",
"source",
"arc",
"verifyUrl",
"recordedAt"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}