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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, $0.05/call, status unknown (last checked 2026-09-14).
Verifies whether an AI agent's buyer role, status, and approval policy are compatible with a target x402 product category, price, and data sensitivity before purchase.
Price / call$0.05
Success—
StatusUnknown
How this service works
Machine-payable service intelligence for discovering, verifying, and monitoring identity, risk, authorization, execution-preflight, and evidence APIs before autonomous agents spend.
Output
Returns a JSON object containing a risk assessment with risk_level (e.g. 'low'), a numeric risk_score, and a flags array listing any governance violations or concerns, along with identity metadata, network info (e.g. 'eip155:8453'), and provenance details about the product and buyer.
Example use cases
Example prompt
“Before my finance_agent buys that wallet_risk API priced at 2.50 USDC, run a buyer identity preflight to check if the role is allowed for a high-sensitivity product — the agent is currently active and the purpose is portfolio_monitoring.”
Technical details
Endpoint
GEThttps://base-agent-preflight.bytoken2023.workers.dev/v1/x402/agent/buyer-identity-preflightWhen to prefer
Use this endpoint when an AI agent is about to make an x402 micropayment purchase and you need a lightweight, pre-transaction governance check to confirm the agent's declared role is appropriate for the product category, price tier, and data sensitivity — before committing any USDC. Prefer this over post-hoc audit tools or general payment firewalls when you specifically need buyer identity and role-fitness validation rather than spend-limit enforcement.
Side effects
- Missing required query params agent_role or product_category returns a 400 error
- Invalid enum value for agent_role or agent_status returns a validation error
- price_usdc with invalid format (non-numeric or wrong precision) rejected by schema
- agent_status 'disabled' likely triggers a high risk_score and flags
- Restricted data_sensitivity without approval_ref may cause policy flag
- Cloudflare Worker cold start or downtime returns 503
- Unrecognized product_category pattern (not matching ^[a-z0-9_-]{2,80}$) returns 400
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"network": "eip155:8453",
"product": "agent-buyer-identity-preflight",
"assessment": {
"flags": [],
"risk_level": "low",
"risk_score": 0
}
}
}Tags
x402
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