# Blockscout Transaction Summary by Chain

> Blockscout Transaction Summary by Chain is a paid API for AI agents from api.blockscout.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-12).

Fetches a human-readable summary of a specific transaction on a given blockchain network via Blockscout's multichain explorer API

## Facts

- Endpoint: GET https://api.blockscout.com/%7Bchain_id%7D/api/v2/transactions/%7Btransaction_hash_param%7D/summary
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/blockscout-transaction-summary-by-chain-faf73419
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vP3G4kZloLTQ3av9wbK76

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability blockscout-transaction-summary-by-chain-faf73419
```

Example prompt: Can you pull up a plain-English summary of transaction 0x4f6b8a...d92e on Ethereum (chain ID 1) from Blockscout so I can understand what actually happened in that transaction?

## When to prefer this

Choose this endpoint when you need a quick, human-readable summary of a specific transaction on a supported blockchain network and already have the transaction hash. It is especially useful for multichain contexts where a single API covers Ethereum, Polygon, Base, Arbitrum, and other EVM-compatible chains. Prefer it over raw RPC calls when you want decoded, summarized transaction data rather than raw hex output.

## Known failure modes

- Invalid or malformed transaction hash returns an error or empty result
- Unsupported chain_id results in a 404 or not-found response
- Transaction not yet indexed returns no data or a pending state
- Network timeouts on heavily loaded chains
- Paid endpoint returns 402 if USDC payment is not included

## How this service works

Explore crypto activities with Blockscout's multichain search. Find transactions, addresses, tokens, and dapps across top blockchain networks — your go-to explorer for cross-chain blockchain data

## Output

A JSON object containing a human-readable summary of the specified transaction, including details such as transaction type, status, involved addresses, token transfers, and other decoded activity relevant to the transaction hash on the specified chain.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object",
     "properties": {
      "chain_id": {
       "type": "string"
      },
      "transaction_hash_param": {
       "type": "string"
      }
     }
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "just_request_body": {
       "type": "boolean"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {}
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/blockscout-transaction-summary-by-chain-faf73419/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.blockscout.com](https://www.zero.xyz/host/api.blockscout.com/llms.txt)