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Blockchain Transaction Status Lookup
x402
Blockchain Transaction Status Lookup is a paid API for AI agents from freetier-agent-api.pages.dev, paid per call via x402, $0.0015/call, status unknown (last checked 2026-10-30).
Looks up the status, details, and finality of one or more on-chain transactions by hash across multiple EVM chains
Price / call$0.0015
Success—
StatusUnknown
How this service works
Invoice-to-JSON, on-chain tools (transaction explainer + payment check, wallet profile, contract ABI, ERC-20 token risk), company contacts and web-to-RAG for AI agents. Pay per call with x402 (USDC on Base). No signup, no API key.
Output
Returns an array of transaction objects each containing status (success/fail), block number, from/to addresses, gas used, effective gas price, fee in native coin, number of confirmations, finality flag, and chain details. Also includes a summary with success count and current block head numbers per chain.
Example use cases
Verify on-chain payment receipt
“I just sent a USDC payment and the transaction hash is 0xad06b77208318128017ce69952685e3f242281202d7cc9d50847619a706d2d7f — can you check if it succeeded and whether it's finalized on Base?”
Debug failed DeFi transaction
“My swap transaction 0x1234abcd... doesn't seem to have gone through — can you look up its status on Ethereum and tell me if it failed, how much gas was used, and what block it was in?”
Batch-check multiple transaction hashes
“I have three tx hashes from yesterday that I need to verify across any EVM chain — 0xaaa..., 0xbbb..., and 0xccc... — can you check all of them and give me a summary of which ones succeeded?”
Technical details
Endpoint
GEThttps://freetier-agent-api.pages.dev/api/tx-status?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to verify the on-chain status of EVM transactions by hash — especially across multiple chains like Ethereum, Base, Arbitrum, Optimism, and Polygon — without setting up API keys or accounts. Ideal for AI agents that need pay-per-call on-chain verification using USDC via x402. Supports batch lookups of up to 10 hashes in one call.
Side effects
- Invalid or malformed transaction hash returns an error or null entry
- Transaction not found on any searched chain returns empty results
- Unsupported chain enum value causes a validation error
- Submitting more than 10 hashes in a comma-separated list may be rejected
- Network or upstream RPC errors may cause partial or failed responses
- Payment failure via x402 protocol blocks the request entirely
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"txs": [
{
"to": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
"from": "0xca5e87f82b3fa093800e6ad67d621a427d79c70d",
"hash": "0xad06b77208318128017ce69952685e3f242281202d7cc9d50847619a706d2d7f",
"logs": 2,
"block": 53070553,
"chain": "base",
"status": "success",
"chainId": 8453,
"gas_used": 86486,
"finalized": true,
"fee_native": "0.000000865878344687",
"native_coin": "ETH",
"confirmations": 13910,
"effective_gas_price_gwei": 0.01
}
],
"count": 1,
"summary": {
"success": 1
}
}
}Tags
x402
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