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ISHOB Explain Transaction
x402
ISHOB Explain Transaction is a paid API for AI agents from api.ishob.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-15).
Decodes a blockchain transaction into plain-English: type (swap, transfer, NFT, etc.), net token changes with USD values, token movements, approvals, decoded function call, and fee — across 6 EVM chains.
Price / call$0.005
Success—
StatusUnknown
How this service works
Explain any mined transaction in plain English: what happened (swap, transfer, approval, NFT buy/sell/mint, wrap, contract deploy, failed + revert reason), the sender's net token changes with USD values, every token and native-coin movement, approvals granted, the function called (named from the verified ABI or a signature database, with decoded arguments) and the fee. Rule-based, no AI. Ethereum, Base, Arbitrum, Optimism, Polygon, BNB Chain.
Output
A structured plain-English breakdown of the transaction including: classified transaction type (swap, transfer, NFT buy/sell/mint, wrap, approval, contract deploy, or failure), the sender's net token changes with USD valuations, a list of every token and native-coin movement, any approvals granted with spender and amount, the named function called (from ABI or signature DB) with decoded arguments, and the gas fee paid — all derived rule-based without AI inference.
Example use cases
Investigating a failed DeFi swap
“This transaction on Arbitrum keeps showing as failed — 0x1a2b3c4d5e6f7a8b9c0d1e2f3a4b5c6d7e8f9a0b1c2d3e4f5a6b7c8d9e0f1a2b — can you decode it and tell me exactly why it reverted?”
Verifying an NFT purchase on Base
“I just bought an NFT and want to confirm the transaction went through correctly — can you explain what happened in this Base chain tx 0xdeadbeef1234567890abcdef1234567890abcdef1234567890abcdef12345678, including which tokens moved and the final USD amounts?”
Auditing a wallet approval on Polygon
“Someone sent me this Polygon transaction hash 0xabcdef1234567890abcdef1234567890abcdef1234567890abcdef1234567890ab — can you tell me if it's an approval, what contract was approved, and how much was authorized?”
Technical details
Endpoint
GEThttps://api.ishob.com/v1/crypto/explain-tx?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a detailed, rule-based (deterministic, no AI hallucination) breakdown of a specific on-chain transaction across Ethereum, Base, Arbitrum, Optimism, Polygon, or BNB Chain. Ideal when you need USD-valued net token changes, decoded function arguments, or failure/revert reasons for a single tx hash. Prefer this over block-explorer scraping when you need structured data programmatically, and over AI-based decoders when deterministic accuracy is required.
Side effects
- Invalid or malformed transaction hash (not 0x + 64 hex) returns validation error
- Transaction hash not found on the specified chain returns 404 or not-found error
- Unsupported chain enum value returns schema validation error
- Unverified contract ABI falls back to signature-database lookup which may return generic function names
- Very new transactions not yet indexed may return not-found temporarily
- Payment failure via x402 protocol results in 402 response before data is returned
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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