Tool detail

Otto AI

Decodes an EVM transaction hash across 11 chains and returns a human-readable summary of swaps, transfers, approvals and other DeFi interactions.

Categories: Onchain data

Use when

explain what a transaction hash did in plain language
summarize a swap or approval transaction for a report

Not for

not a raw receipt/log dump, human-readable summary only

Inputs

POST JSON body: txHash (string, required, 0x + 64 hex chars); chain (enum of 11 EVM chains, optional, default base); outputLevel (enum summary|detailed, optional).

Admitted input schema

{
  "type": "object",
  "properties": {
    "chain": {
      "type": "string",
      "minLength": 0,
      "maxLength": 4096,
      "enum": [
        "base",
        "ethereum",
        "arbitrum",
        "optimism",
        "avalanche",
        "polygon",
        "mantle",
        "monad",
        "plasma",
        "bsc",
        "hyperliquid"
      ],
      "description": "Blockchain network (default: base). 11 EVM chains supported."
    },
    "outputLevel": {
      "type": "string",
      "minLength": 0,
      "maxLength": 4096,
      "enum": [
        "summary",
        "detailed"
      ],
      "description": "'summary' = one-liner, 'detailed' = full breakdown"
    },
    "txHash": {
      "type": "string",
      "minLength": 0,
      "maxLength": 4096,
      "pattern": "^0x[a-fA-F0-9]{64}$",
      "description": "Transaction hash (0x-prefixed, 64 hex characters)"
    }
  },
  "required": [
    "txHash"
  ],
  "additionalProperties": false
}

Endpoint

Method: POST
URL: https://x402.ottoai.services/tx-explainer

Payment

Protocol: x402
Listed price: $0.01 USDC per call on Base
Payment method: exact
Network: eip155:8453
Asset: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Listed terms are catalog metadata. The caller supplies inputs and calls the tool outside Onelayer. If payment is required, the caller uses a compatible wallet to pay.

Source

Directory: Coinbase x402 Bazaar
Record: POST https://x402.ottoai.services/tx-explainer
Retrieved: 2026-09-30T20:37:07.382Z
Catalog file SHA-256: 6837ccddf886f0007cf3727ea9d27faaa5047b51b4f425345c554ce1c271a524
Catalog built: 2026-09-30T22:31:58.034Z