Keyless hosted MCP: pre-signature x402 payment verdict (GO/HOLD/STOP) with a signed receipt.
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Pre-signature x402 payment verdict: GO / HOLD / STOP for paying a counterparty, from settlement reputation, price-anomaly (quoted vs the payee's own median), and OFAC sanctions — with a third-party-verifiable Ed25519 signed receipt. Verdict only; never takes custody. Free under $10 at risk; over that, returns an x402 payment challenge.
e.g. USDC
e.g. base
amount as a decimal string, e.g. "0.09"
recipient wallet from the 402
agent's EVM wallet (optional; binds settlement)
{quoted_price_history, expected_recipient}
caller DID/identity
what's being paid for
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Pre-signature x402 payment verdict: GO / HOLD / STOP for paying a counterparty, from settlement reputation, price-anomaly (quoted vs the payee's own median), and OFAC sanctions — with a third-party-verifiable Ed25519 signed receipt. Verdict only; never takes custody. Free under $10 at risk; over that, returns an x402 payment challenge.
| Argument | Type | Description |
|---|---|---|
| asset* | string |
| e.g. USDC |
| chain* | string | e.g. base |
| payer | string | agent's EVM wallet (optional; binds settlement) |
| amount* | string | amount as a decimal string, e.g. "0.09" |
| context | object | {quoted_price_history, expected_recipient} |
| agent_id | string | caller DID/identity |
| resource | string | what's being paid for |
| counterparty* | string | recipient wallet from the 402 |
{
"type": "object",
"required": [
"counterparty",
"amount",
"asset",
"chain"
],
"properties": {
"asset": {
"type": "string",
"description": "e.g. USDC"
},
"chain": {
"type": "string",
"description": "e.g. base"
},
"payer": {
"type": "string",
"description": "agent's EVM wallet (optional; binds settlement)"
},
"amount": {
"type": "string",
"description": "amount as a decimal string, e.g. \"0.09\""
},
"context": {
"type": "object",
"description": "{quoted_price_history, expected_recipient}"
},
"agent_id": {
"type": "string",
"description": "caller DID/identity"
},
"resource": {
"type": "string",
"description": "what's being paid for"
},
"counterparty": {
"type": "string",
"description": "recipient wallet from the 402"
}
}
}