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SignGate Stablecoin Health Preflight
x402
SignGate Stablecoin Health Preflight is a paid API for AI agents from base-agent-preflight.bytoken2023.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).
Assesses the risk and health of a stablecoin token on a given chain before an AI agent purchases an x402-gated API, dataset, or tool priced in that stablecoin.
Price / call$0.01
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, product name ('stablecoin-health'), and an assessment block with risk_level (e.g. 'low'), a numeric risk_score, and an array of flags describing any detected issues with the token's health or safety on the specified chain.
Example use cases
Pre-purchase stablecoin safety check
“My agent is about to buy an x402 API using the token at 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 on eip155:8453 — can you check the stablecoin health and risk level before it spends anything?”
Autonomous agent payment governance
“Before my trading bot pays for a DeFi data feed on Base using a stablecoin, run a preflight risk assessment on token 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on chain eip155:8453 and tell me the risk score and any flags.”
Stablecoin vetting for agent fleet
“I'm setting up a fleet of AI agents that will buy x402 tools automatically — can you check the health of the stablecoin at 0xd9aAEc86B65D86f6A7B5B1b0c42FFA531710b6CA on eip155:8453 and confirm it's low risk before I configure it as their payment token?”
Technical details
Endpoint
GEThttps://base-agent-preflight.bytoken2023.workers.dev/v1/x402/agent-risk/stablecoin-healthWhen to prefer
Use this endpoint when an AI agent is about to autonomously spend stablecoin funds via x402 and needs a lightweight, fast risk signal on the payment token itself — specifically the stablecoin's health, not the target API's content. Prefer this over general token analytics when you need a pass/fail governance gate before a micropayment, especially on Base (eip155:8453).
Side effects
- Invalid or malformed token address (must be 0x-prefixed 40-char hex) returns validation error
- Unsupported chain identifier returns error or empty assessment
- Token not found or not indexed on specified chain may return null or unknown risk
- Service unavailable on Cloudflare Workers edge returns 5xx
- Payment failure (x402) if USDC payment not processed returns 402
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"network": "eip155:8453",
"product": "stablecoin-health",
"assessment": {
"flags": [],
"risk_level": "low",
"risk_score": 0
}
}
}Tags
x402
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