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x402 Web Probe – Blockchain Transaction Lookup (Hub Europe, Germany)
x402
x402 Web Probe – Blockchain Transaction Lookup (Hub Europe, Germany) is a paid API for AI agents from kollmz.site:8443, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-27).
Looks up details of a blockchain transaction by hash on Base or Ethereum, returning status, block, gas used, confirmations, and value — paid per-call via USDC on Base.
Price / call$0.002
Success—
StatusUnknown
How this service works
Pay-per-call website uptime/latency/TLS checks and fetch-to-Markdown, measured from Hub Europe (Germany). USDC on Base via x402. No account or API key.
Output
Returns a JSON object with the transaction's to/from addresses, block number, status (success/failure), gas used, ETH value transferred, and number of confirmations.
Example use cases
Verify crypto payment confirmation
“I just sent a USDC payment on Base with hash 0x142d15b73dfbf96c4a75a62079e8a1f4999916229734e0c28feafc752323e599 — can you confirm it went through and tell me how many confirmations it has?”
Debug failed Ethereum transaction
“This Ethereum transaction 0xabc123...def456 seems to have failed — can you look it up and tell me the status, gas used, and what block it landed in?”
Audit on-chain settlement record
“For our records, look up transaction 0x9f3e...1a2b on Base and give me the full details — sender, recipient, value, block number, and whether it succeeded.”
Technical details
Endpoint
GEThttps://kollmz.site:8443/v1/chain/tx?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a lightweight, pay-per-call transaction lookup on Base or Ethereum without signing up for an API key or account — ideal for agents that only occasionally need on-chain tx data and want to pay micro-amounts per query via x402. Not ideal for high-volume batch lookups or chains beyond Base and Ethereum.
Side effects
- Invalid or malformed transaction hash returns an error
- Unsupported chain name (not 'base' or 'ethereum') returns a validation error
- Transaction not yet indexed or very new may return not-found
- Payment via x402 fails if wallet has insufficient USDC on Base
- Network or node connectivity issues may cause timeouts
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"to": "0x...",
"from": "0x...",
"block": 36000000,
"status": "success",
"gas_used": "52000",
"value_eth": "0",
"confirmations": 12
}
}Tags
x402
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