Api Endpoint

Otto AI

Decode and explain any EVM blockchain transaction across 11 chains (Base, Ethereum, Arbitrum, Optimism, Avalanche, Polygon, Mantle, Monad, Plasma, BSC, Hyperliquid). Get a human-readable summary of swaps, transfers, approvals, DeFi interactions, and more.

Open interactive test console

Offering

Provider: x402.ottoai.services
Method: GET
Offering type: Api Endpoint
Transport type: http
Category: Financial Analysis
Delivery: Not provided
Pricing model: Not provided
x402 version: 2

Endpoint context

URL: https://x402.ottoai.services/tx-explainer
MIME type: application/json
First seen: 2026-10-16T01:50:04.685Z
Last seen: 2026-11-01T19:10:28.588Z
Tags: transaction explainer, tx decoder, blockchain transaction, EVM, X402, agentic-markets, Crypto, market-data, otto-ai, crypto-intelligence, News, Intelligence, DeFi, Onchain, hyperliquid

Website Documentation OpenAPI

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1: 0.01 USDC
Atomic price: 10000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Payment option 2: 0.01 USDC
Atomic price: 10000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Payment option 3: 0.01 USDC
Atomic price: 10000 · Network: solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · Asset: USDC · Scheme: exact

Raw x402 terms

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "10000",
    "payTo": "0x0E84dDEdAaE6A779c462C22a59F301EC31B6b808"
  },
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "10000",
    "payTo": "0x0E84dDEdAaE6A779c462C22a59F301EC31B6b808"
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "10000",
    "payTo": "6XcSfqJHr9vNW2vbiRaMqUYVm7shDgLepca54wUTDPN5"
  }
]

Observed health

Status: Healthy
Latest latency: 137 ms
Average latency: 458 ms
HTTP status: 402
Last checked: 2026-11-01T19:10:28.584Z
Reachability: 100% over 13 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

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

Output schema

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "input": {
      "additionalProperties": false,
      "properties": {
        "method": {
          "enum": [
            "GET"
          ],
          "type": "string"
        },
        "queryParams": {
          "properties": {
            "chain": {
              "description": "Blockchain network (default: base). 11 EVM chains supported.",
              "enum": [
                "base",
                "ethereum",
                "arbitrum",
                "optimism",
                "avalanche",
                "polygon",
                "mantle",
                "monad",
                "plasma",
                "bsc",
                "hyperliquid"
              ],
              "type": "string"
            },
            "outputLevel": {
              "description": "'summary' = one-liner, 'detailed' = full breakdown",
              "enum": [
                "summary",
                "detailed"
              ],
              "type": "string"
            },
            "txHash": {
              "description": "Transaction hash (0x-prefixed, 64 hex characters)",
              "pattern": "^0x[a-fA-F0-9]{64}$",
              "type": "string"
            }
          },
          "required": [
            "txHash"
          ],
          "type": "object"
        },
        "type": {
          "const": "http",
          "type": "string"
        }
      },
      "required": [
        "type",
        "method"
      ],
      "type": "object"
    },
    "output": {
      "properties": {
        "example": {
          "properties": {
            "chain": {
              "description": "Blockchain name",
              "type": "string"
            },
            "details": {
              "description": "Structured decode — from, to, value (in the chain's gas token: ETH, AVAX, BNB, POL…), gasUsed, gasCostNative (execution gas paid, in the chain's gas token; excludes a separate L1 data fee), gasCostUsd (always null: no live gas-token price), method, selector, signature, pattern, events (always included; interpretation prose only when outputLevel=detailed)",
              "type": "object"
            },
            "error": {
              "description": "Error message if failed",
              "type": "string"
            },
            "explorerUrl": {
              "description": "Link to block explorer",
              "type": "string"
            },
            "status": {
              "enum": [
                "success",
                "failed"
              ],
              "type": "string"
            },
            "summary": {
              "description": "Human-readable transaction summary",
              "type": "string"
            },
            "txHash": {
              "description": "Transaction hash",
              "type": "string"
            }
          },
          "required": [
            "status"
          ],
          "type": "object"
        },
        "type": {
          "type": "string"
        }
      },
      "required": [
        "type"
      ],
      "type": "object"
    }
  },
  "required": [
    "input"
  ],
  "type": "object"
}