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Onchain Query API – Transaction Lookup & Decode
x402
Onchain Query API – Transaction Lookup & Decode is a paid API for AI agents from chain.cyberwarex.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-14).
Looks up and decodes an EVM transaction by hash, returning success/failure status, gas fees in native token and USD, and all ERC-20 transfers with human-readable amounts.
Price / call$0.003
Success—
StatusUnknown
How this service works
Transaction lookup and decode on any major EVM chain. Turns a raw tx hash into agent-readable facts: success or failure status, block number, sender and recipient, native value transferred, gas used, fee in native token and USD, and every ERC-20 transfer decoded with token symbol, decimals and human-readable amount. Returns found=false for an unknown hash instead of erroring.
Output
Returns a JSON object with found (boolean), chain, hash, block number, status (success/failed), from address, to address, value_native, gas_used, fee object (native token amount + USD equivalent), logs_count, and an erc20_transfers array of up to 10 decoded token transfers each including symbol, decimals, and human-readable amount. Returns found=false without error when the hash is unknown.
Example use cases
Verify a DeFi swap completed
“Check if this transaction succeeded on Base and show me which ERC-20 tokens were swapped and in what amounts: 0xabc123def456abc123def456abc123def456abc123def456abc123def456abc123de”
Audit a payment sent to me
“I just received a payment — can you pull up transaction 0x9f8e7d6c5b4a3928374650192837465019283746501928374650192837465019ab on Ethereum and confirm the sender, the USDC amount transferred, and the exact gas fee paid in USD?”
Debug a failed on-chain transaction
“This transaction on Arbitrum seems to have failed — hash is 0x111222333444555666777888999aaabbbcccdddeeefffaaa111222333444555666. Can you decode it and tell me the status, how much gas was used, and whether any ERC-20 transfers went through?”
Technical details
Endpoint
GEThttps://chain.cyberwarex.com/txWhen to prefer
Choose this endpoint when you need a fully decoded, agent-readable breakdown of a specific EVM transaction — including fee in USD and ERC-20 transfer semantics — across Base, Ethereum, Arbitrum, Optimism, or Polygon. Prefer it over raw RPC calls when you need human-readable amounts and USD fee conversion without writing your own ABI decoding logic. The graceful found=false response makes it safe to probe unconfirmed or unknown hashes without error handling overhead.
Side effects
- Unknown or unindexed transaction hash returns found=false instead of an error
- Invalid hash format (not 0x + 64 hex chars) likely causes a validation error
- Chain enum mismatch — specifying the wrong chain for a hash returns found=false
- Rate limiting or payment failure (x402) returns 402 or relevant HTTP error
- Network or RPC outage on the queried chain may cause a timeout or 5xx error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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