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Agent Buyer Identity Preflight | x402 Purchase Governance (QuickNode Wallet Execution Readiness)
x402
Agent Buyer Identity Preflight | x402 Purchase Governance (QuickNode Wallet Execution Readiness) 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).
Performs a pre-purchase risk and identity check on an Ethereum wallet address to assess whether an AI agent is eligible to buy x402-gated QuickNode wallet-execution APIs or tools.
Price / call$0.05
Success—
StatusUnknown
How this service works
Machine-payable service intelligence for discovering, verifying, and monitoring identity, risk, authorization, execution-preflight, and evidence APIs before autonomous agents spend.
Output
Returns a JSON object containing the network (e.g. eip155:8453 for Base), product identifier (quicknode-wallet-execution-readiness), and an assessment object with a risk_level (e.g. 'low'), numeric risk_score, and an array of flags. May also include identity and provenance sub-objects with additional wallet metadata.
Example use cases
Pre-purchase wallet risk screening
“My agent is about to pay for a QuickNode x402 API — first check whether wallet 0xDeF9876543210fedcba9876543210fedcba987654 is cleared to make that purchase and tell me the risk level.”
Autonomous agent spend policy enforcement
“Before my trading bot at address 0x1111111111111111111111111111111111111111 buys any x402 tools, I want a governance preflight to confirm it fits the buyer policy and doesn't have any risk flags.”
New wallet onboarding eligibility check
“I just set up a new agent wallet 0xAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAa — can you run the x402 purchase preflight check on it so I know if it's ready to start buying QuickNode APIs autonomously?”
Technical details
Endpoint
GEThttps://base-agent-preflight.bytoken2023.workers.dev/v1/x402/quicknode/wallet-execution-readinessWhen to prefer
Choose this endpoint when an AI agent needs a lightweight, fast governance check before executing an x402 micropayment for a QuickNode-specific wallet-execution API. Prefer it over generic wallet screening tools when operating in the x402 ecosystem on Base (EIP-155:8453) and when the product category is QuickNode wallet execution readiness. Best used as a pre-flight gate in automated agent purchasing pipelines to enforce spend policies without requiring human approval.
Side effects
- Invalid or malformed Ethereum address (not matching ^0x[a-fA-F0-9]{40}$) returns a 400 or validation error
- Wallet address not found or no on-chain history results in limited assessment data
- Service unavailable or Cloudflare Worker timeout returns 5xx
- Missing required 'address' query parameter causes request rejection
- High-risk wallet returns elevated risk_score and populated flags array, potentially blocking purchase
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"network": "eip155:8453",
"product": "quicknode-wallet-execution-readiness",
"assessment": {
"flags": [],
"risk_level": "low",
"risk_score": 0
}
}
}Tags
x402
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