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Agent Buyer Identity Preflight | x402 Purchase Governance
x402
Agent Buyer Identity Preflight | x402 Purchase Governance is a paid API for AI agents from base-agent-preflight.bytoken2023.workers.dev, paid per call via x402, $49/call, status unknown (last checked 2026-09-14).
Performs a pre-purchase policy check to verify whether an AI agent's buyer role, segment, and context meet the approval criteria for a given x402-gated API, dataset, or tool.
Price / call$49
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 containing the network (e.g. eip155:8453 for Base), product identifier, and a full assessment block with risk_score, risk_level, and flags array. May also include identity, activity, and provenance sub-objects depending on the format requested (manifest, policy, or quickstart).
Example use cases
Enterprise agent pre-purchase compliance check
“Before our autonomous agent buys that x402 dataset, run a preflight policy check for the enterprise buyer type and return the full policy manifest so I can see the risk score and any compliance flags.”
Developer validating x402 tool purchase eligibility
“I'm a developer trying to buy access to an x402-gated tool — can you do a buyer policy preflight check for the developer segment and show me a quickstart format so I know if I'm eligible?”
Startup agent risk assessment before API spend
“Our startup's AI agent is about to purchase an x402 API on Base — run a SignGate preflight check for the startup buyer type and tell me the risk level and any flags before it goes through.”
Technical details
Endpoint
GEThttps://base-agent-preflight.bytoken2023.workers.dev/v1/x402/agent/buyer-policy-kitWhen to prefer
Use this endpoint when an AI agent needs to perform a pre-purchase governance check before spending USDC on an x402-gated resource. It is specifically designed for the x402 protocol ecosystem on Base network and provides structured risk assessment, buyer segment filtering, and policy manifests — making it the right choice over generic identity checks when the purchase involves x402 payment gating and autonomous agent buyers.
Side effects
- Missing or invalid buyer_type enum value results in a validation error
- Unsupported format parameter returns an error or empty response
- High-risk agent identity or policy mismatch may return elevated risk_level with disqualifying flags
- Network or worker availability issues on Cloudflare may cause timeouts
- Payment of $49 USDC required per call — unpaid requests return HTTP 402
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"network": "eip155:8453",
"product": "agent-buyer-policy-kit",
"assessment": {
"flags": [],
"risk_level": "low",
"risk_score": 0
}
}
}Tags
x402
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