x402 Payment Pre-Sign Validation, Facilitator Compatibility, Protocol Diagnostics & Settlement Risk

x402 Payment Pre-Sign Validation, Facilitator Compatibility, Protocol Diagnostics & Settlement Risk

Validate an x402 payment before signing: check facilitator compatibility, payment-protocol diagnostics, network and asset support, replay risk, and settlement risk from maintained compatibility evidence.

0.01 USDC per successful call · Base or Solana · x402

Paid endpoint: https://intelligence.inversolabs.us/v1/services/x402-compatibility-intelligence/invoke

Why buy instead of recreate?

Foundry estimates that reproducing and testing this maintained capability would cost an agent about $7.0 and 360 minutes, versus 0.01 USDC per successful call. This is a Foundry estimate, not measured customer behavior.

Example invocation

POST https://intelligence.inversolabs.us/v1/services/x402-compatibility-intelligence/invoke
Idempotency-Key: your-stable-request-id
Content-Type: application/json

{
  "discovery_mode": "bazaar_v2",
  "facilitator_url": "https://api.cdp.coinbase.com/platform/v2/x402",
  "offer": {
    "accepts": [
      {
        "amount": "10000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "network": "eip155:8453",
        "payTo": "0x0000000000000000000000000000000000000001",
        "scheme": "exact"
      }
    ],
    "resource": {
      "description": "Machine-readable data service"
    },
    "x402Version": 2
  },
  "policy": {
    "allowed_assets": [
      "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
    ],
    "allowed_networks": [
      "eip155:8453"
    ],
    "max_amount_atomic": "20000",
    "max_observation_age_days": 7
  }
}

Illustrative successful result

{
  "assessed_at": "2026-08-20T00:00:00+00:00",
  "evidence": [],
  "limitations": [
    "No payment was signed or submitted."
  ],
  "reasons": [
    "fresh_live_compatibility_pass"
  ],
  "recovery": null,
  "safe_to_sign": true,
  "selected": {},
  "verdict": "buy"
}