Sign Guard
GET 402.com.tr/api/x402/sign-guard
Why an agent can trust this route.
Sonar evidence is advisory. Paid delivery is shown as verified only when paid probes are available; otherwise route estimates use the unpaid handshake as a clearly labeled proxy.
Observed outcomes
The check before the riskiest moment — signing. Decodes raw unsigned calldata (approve / permit / transfer / setApprovalForAll), shows the exact intent (who gets power over what, and whether it's UNLIMITED), and screens the destination + spender for OFAC sanctions and dangerous owner powers, in one GO/HOLD/STOP verdict + receipt. No simulation needed — pure decode + onchain risk. Catches the unlimited-approval drain vector before it's signed.
Resource: 402.com.tr/api/x402/sign-guard
Network: eip155:8453 · Asset: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 · Pay to: 0x973a31858f4d2125f48c880542da11a2796f12d6
Payment methods: — · Last validation: 2026-10-15 11:43:37.985+00
{
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"pathParams": {
"type": "object"
},
"queryParams": {
"type": "object",
"required": [
"data"
],
"properties": {
"to": {
"type": "string",
"description": "Destination contract/token (recommended)"
},
"data": {
"type": "string",
"description": "Transaction calldata (0x…)"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
},
"paymentRequirements": [
{
"raw": {
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x973a31858f4d2125f48c880542da11a2796f12d6",
"amount": "60000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"payTo": "0x973a31858f4d2125f48c880542da11a2796f12d6",
"scheme": "exact",
"network": "eip155:8453",
"amountAtomic": "60000"
}
]
}Source catalog records are retained separately from live endpoint observations. Sonar score, uptime, and latency are advisory metrics. CDP indexing is not inferred from validation.