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Crystal Crypto Risk Evidence via SumSub — x402 Preflight Check
x402
Crystal Crypto Risk Evidence via SumSub — x402 Preflight Check is a paid API for AI agents from base-agent-preflight.bytoken2023.workers.dev, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).
Checks a wallet address against SumSub/Crystal crypto risk data to assess AML risk level before an AI agent makes an x402 purchase.
Price / call$0.05
Success—
StatusUnknown
How this service works
Machine-payable service intelligence for discovering, verifying, and monitoring identity, risk, authorization, execution-preflight, and evidence APIs before autonomous agents spend.
Output
Returns a JSON object with the network (e.g. eip155:8453/Base), product name, risk level (low/medium/high), numeric risk score, and an array of risk flags from Crystal's AML database. An empty flags array and risk_score of 0 indicates a clean wallet.
Example use cases
Pre-purchase AML screening for agent
“My AI agent is about to buy a dataset via x402 from wallet 0x1234567890abcdef1234567890abcdef12345678 — can you run a Crystal crypto risk check on that wallet first and tell me the risk level and any flags?”
Counterparty risk check before API payment
“Before we send payment to 0xdeadbeefdeadbeefdeadbeefdeadbeefdeadbeef for that x402 API access, pull the SumSub Crystal risk evidence on that address so we know the risk score.”
Transaction reference risk audit
“Check the crypto risk evidence for wallet 0xAaBbCcDdEeFf001122334455667788AaBbCcDdEe with transaction reference tx-audit-20240601:001 — I need to know if there are any risk flags before approving this x402 purchase.”
Technical details
Endpoint
GEThttps://base-agent-preflight.bytoken2023.workers.dev/v1/x402/sumsub/crystal-crypto-risk-evidenceWhen to prefer
Use this endpoint when an AI agent or automated workflow needs to screen a crypto wallet for AML/compliance risk specifically using Crystal's blockchain analytics before executing an x402 micropayment. Prefer this over generic wallet lookup tools when you need a structured risk score with flags from a KYC/AML-grade provider (SumSub Crystal), particularly for Base network (eip155:8453) transactions.
Side effects
- Invalid wallet address format (must be 0x + 40 hex chars) returns validation error
- Unknown or unindexed wallet returns empty activity data with default low score
- Network unavailable or SumSub API timeout returns 503
- Invalid transaction_reference format returns 400 bad request
- Payment of $0.05 USDC not settled results in 402 response blocking the check
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"network": "eip155:8453",
"product": "sumsub-crystal-crypto-risk-evidence",
"assessment": {
"flags": [],
"risk_level": "low",
"risk_score": 0
}
}
}Tags
x402
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