Revenue Swarm x402 Payment Preflight & Audit

x402

Revenue Swarm x402 Payment Preflight & Audit is a paid API for AI agents from eu-tender-x402-v2-production.up.railway.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-02).

Validates x402 USDC payment compatibility for a Base wallet or endpoint before committing a pay-per-call transaction

Price / call$0.001

Seller volume →—

Success—

StatusUnknown

How this service works

Pay-per-call B2B sales lead and procurement intelligence plus Base wallet data for agents. Search EU tenders/RFPs or inspect a Base wallet. Payments use x402 USDC on Base.

Output

Returns a JSON object with a numeric compatibility score (0-100), a verdict string ('compatible' or otherwise), an array of checks performed, a list of warnings, and a list of hard failures — letting the caller know whether the x402 payment flow is ready to proceed.

Example use cases

Pre-flight check before agent API spend

“Before my agent starts calling those pay-per-call EU tender search APIs, run an x402 audit on my Base wallet to confirm it's fully compatible and there are no hard failures — show me the score and verdict.”

Debugging a failing x402 payment

“My agent's x402 USDC payments on Base keep failing — can you run the x402 audit endpoint to check for hard failures or warnings in my payment setup so I can figure out what's wrong?”

Onboarding new agent to x402 APIs

“I'm setting up a new AI agent to use pay-per-call machine APIs with x402 on Base — can you do a compatibility preflight check first and tell me if the score is 100 and the verdict is compatible?”

Technical details

Endpoint

GEThttps://eu-tender-x402-v2-production.up.railway.app/api/x402-audit?utm_source=zero.xyz

When to prefer

Use this endpoint when you need to verify x402 USDC payment compatibility on Base before executing pay-per-call API calls, especially when onboarding a new agent wallet or debugging payment failures. Prefer this over simply attempting a live call when you want to avoid spending USDC on a transaction that will fail, or when you need a structured audit report with scores and hard-failure diagnostics.

Side effects

Wallet address not provided or malformed — returns error or low score
x402 payment parameters missing or incompatible — reflected as hard_failures in response
Network issues reaching Base — connection timeout
USDC balance insufficient for preflight — flagged in warnings
Railway app cold start causing slow initial response

Input

Schema · Request body

Field	Type	Description
inputrequired	object
output	object

Output

Schema · Response

{
  "type": "json",
  "example": {
    "score": 100,
    "checks": [],
    "product": "x402 Payment Preflight & Settle Check",
    "verdict": "compatible",
    "warnings": [],
    "hard_failures": []
  }
}

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