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SignGate x402 Sumsub DB-Net Evidence Preflight
x402
SignGate x402 Sumsub DB-Net Evidence Preflight is a paid API for AI agents from base-agent-preflight.bytoken2023.workers.dev, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-13).
Runs a pre-purchase identity and risk assessment for an AI agent buyer using Sumsub applicant data, returning a risk score and flags before an x402 API transaction proceeds.
Price / call$0.03
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
A JSON object containing the network identifier (e.g. eip155:8453), the product name ('sumsub-db-net-evidence'), and an assessment object with a risk_level (e.g. 'low'), a numeric risk_score, and an array of compliance flags. An empty flags array with low risk_score indicates the buyer is cleared to proceed.
Example use cases
KYC gate before agent data purchase
“My agent is about to buy a sensitive x402 dataset. Can you run a preflight check on Sumsub applicant 'user-9f3k2' to confirm the risk score is acceptable before the payment goes through?”
Governance screen for agent tool acquisition
“Check whether agent buyer with Sumsub ID 'sandbox-agent-001' and principal reference 'org-acme-trading' is cleared to purchase this x402 AI tool — I need the risk level and any flags before authorizing.”
Automated compliance check in agent pipeline
“As part of our automated procurement pipeline, run a Sumsub DB-net evidence preflight for applicant 'kyc-buyer-77x' on the Base network and return the risk assessment so we can decide whether to proceed with the x402 payment.”
Technical details
Endpoint
GEThttps://base-agent-preflight.bytoken2023.workers.dev/v1/x402/sumsub/db-net-evidenceWhen to prefer
Choose this endpoint when an AI agent needs to validate a buyer's identity and risk profile against Sumsub KYC data specifically within the x402 purchase governance flow on Base network. Prefer this over generic identity checks when you need a structured risk_score + flags output tied to the sumsub-db-net-evidence product and need to make a binary proceed/block decision before committing an x402 micropayment.
Side effects
- Invalid or malformed applicant_id format returns a 400 validation error
- Unknown applicant_id not found in Sumsub returns a not-found or empty assessment
- Network or Cloudflare worker timeout returns a 503 or gateway error
- Missing required applicant_id query parameter results in schema validation failure
- High risk score or populated flags array indicates buyer is not cleared — not a network error but a business-logic block
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"network": "eip155:8453",
"product": "sumsub-db-net-evidence",
"assessment": {
"flags": [],
"risk_level": "low",
"risk_score": 0
}
}
}Tags
x402
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