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Arkham x402 Transaction Lookup
x402
Arkham x402 Transaction Lookup is a paid API for AI agents from api.arkm.com, paid per call via x402, $0.4/call, status unknown (last checked 2026-09-14).
Fetches enriched on-chain transaction details by hash, including USD value, gas data, and Arkham entity labels for sender/receiver addresses.
Price / call$0.4
Success—
StatusUnknown
How this service works
Get Arkham transaction details. $0.40 per call.
Output
A JSON object containing full transaction metadata: chain, status (completed/pending/failed), transaction hash, block number, block hash, block timestamp, from/to addresses with Arkham entity labels (name, address, chain type), token symbol and ID, ETH price at time of transaction, USD value of the transfer, gas price, gas limit, gas used, receipt status, contract address (if applicable), and whether it was a mempool transaction.
Example use cases
Trace a suspicious wallet transfer
“I just saw a large ETH transfer flagged on-chain — can you pull up transaction 0xabc123...def and tell me who the sender and receiver are, whether Arkham has labels on either address, and what the USD value was at the time?”
Verify a received payment
“I'm expecting a payment from a counterparty — can you check transaction hash 0x5c504ed432cb51138bcf09aa5e8a410dd4a1e204ef84bfed1be16dfba1b22060 on Ethereum and confirm it completed successfully, how much was transferred in USD, and what block it landed in?”
Gas cost audit for a transaction
“Can you fetch the details of Ethereum transaction 0xd3a1b2c3...f4e5 and tell me the gas price, gas limit, total gas used, and what that worked out to in USD?”
Technical details
Endpoint
POSThttps://api.arkm.com/x402/txWhen to prefer
Choose this endpoint when you need enriched, Arkham-labeled transaction data — specifically when entity identification (who owns the sending/receiving address) matters alongside raw on-chain data. Prefer this over generic blockchain explorers when you need USD valuation, Arkham intelligence labels, and structured JSON output in a single pay-per-request call without managing a subscription.
Side effects
- Invalid or malformed transaction hash returns an error
- Transaction hash not found on the specified chain returns empty or 404
- Network not supported returns an error
- Payment failure via x402 (insufficient USDC balance) blocks the request
- Rate limiting if too many requests are made in a short window
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| hash | — | The transaction hash to look up. |
Output
Schema · Response
{
"type": "json",
"example": {
"ethereum": {
"fee": 1.05,
"hash": "0x5c504ed432cb51138bcf09aa5e8a410dd4a1e204ef84bfed1be16dfba1b22060",
"chain": "ethereum",
"status": "completed",
"tokenID": "ethereum",
"ethPrice": 2.83162,
"gasLimit": 21000,
"gasPrice": 50000,
"usdValue": 8.873447594e-14,
"blockHash": "0x4e3a3754410177e6937ef1f84bba68ea139e8d1a2258c5f85db9f1cd715a1bdd",
"toAddress": "0x5DF9B87991262F6BA471F09758CDE1c0FC1De734",
"unitValue": 3.1337e-14,
"blockNumber": 46147,
"fromAddress": "0xA1E4380A3B1f749673E270229993eE55F35663b4",
"isMempoolTx": false,
"tokenSymbol": "ETH",
"receiptStatus": 0,
"blockTimestamp": "2015-08-07T03:30:33Z",
"contractAddress": null,
"enrichedToAddress": {
"chain": "ethereum",
"address": "0x5DF9B87991262F6BA471F09758CDE1c0FC1De734",
"contract": false,
"isUserAddress": false
},
"enrichedFromAddress": {
"chain": "ethereum",
"address": "0xA1E4380A3B1f749673E270229993eE55F35663b4",
"contract": false,
"arkhamLabel": {
"name": "thanateros.eth",
"address": "0xA1E4380A3B1f749673E270229993eE55F35663b4",
"chainType": "evm"
},
"isUserAddress": false
},
"gasUsageByTransaction": 21000
}
}
}Tags
x402
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