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DappDojo Semantic Transaction Decoder
x402
DappDojo Semantic Transaction Decoder is a paid API for AI agents from api.dappdojo.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).
Decodes a raw EVM blockchain transaction hash into structured, machine-readable intent describing what the transaction actually did
Price / call$0.001
Success—
StatusUnknown
How this service works
Semantic Transaction Decoder that turns raw blockchain transactions into structured, machine-readable intent for AI agents using x402.
Output
A structured JSON object containing the decoded transaction intent, the original tx_hash, and a schema_version field — representing the machine-readable breakdown of what the on-chain transaction accomplished (e.g. swap, transfer, mint, approval).
Example use cases
Example prompt
“Can you decode transaction 0x4a3b...c9f2 on Ethereum mainnet (chain ID 1) and tell me what it actually did — like what contract was called and what the intent was?”
Technical details
Endpoint
POSThttps://api.dappdojo.com/summaryWhen to prefer
Use this endpoint when you have a raw EVM transaction hash and need to understand its semantic meaning — what action was performed, by whom, and on which protocol — rather than just raw calldata. Ideal for AI agents that need to reason about on-chain activity without manually decoding ABI calldata.
Side effects
- Invalid or malformed tx_hash returns an error (not 0x-prefixed or not 32 bytes)
- Unknown or unsupported network/chain ID returns an error
- Transaction not yet confirmed or not found on the specified network
- Rate limiting or payment failure via x402 protocol
- Transaction from an obscure or unrecognized contract may produce incomplete decoding
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| networkrequired | string | Numeric EVM chain id. |
| tx_hashrequired | string | 0x-prefixed 32-byte transaction hash. |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| data | object | |
| tx_hash | string | |
| schema_version | string |
Tags
x402
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