# Blockscout Address Transactions API

> Blockscout Address Transactions API is a paid API for AI agents from api.blockscout.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-15).

Lists all transactions involving a specific blockchain address, with optional to/from filtering and pagination

## Facts

- Endpoint: GET https://api.blockscout.com/:chain_id/api/v2/addresses/:address_hash_param/transactions
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/blockscout-address-transactions-api-2a8220f6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_avyPKbbyVU-mzY8BOnGoS

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-address-transactions-api-2a8220f6
```

Example prompt: Show me the last 25 transactions for Ethereum address 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on the Ethereum mainnet (chain ID 1), filtered to only outgoing transactions.

## When to prefer this

Use this endpoint when you need a full or filtered transaction history for a specific address on any EVM-compatible chain supported by Blockscout. Prefer it over single-transaction lookups when you need to audit activity, monitor wallet behavior, or paginate through historical transactions. It supports to/from filtering, making it more flexible than generic block explorers for directional analysis.

## Known failure modes

- Invalid address hash format returns 400 or empty results
- Unknown chain_id returns 404 or error
- Pagination parameters mismatch causes unexpected results
- Rate limiting or payment failure returns 402
- Address with no transactions returns empty list
- Network-specific endpoints may not support all chains

## How this service works

Access to api/v2/addresses/:address_hash/transactions. List transactions involving a specific address with to-from filtering

## Output

Returns a paginated list of transactions involving the specified address, each including transaction hash, block number, timestamp, from/to addresses, value transferred, gas fee, and transaction index. Supports cursor-based pagination via block_number, index, inserted_at, items_count, hash, and fee parameters.

## 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"
      },
      "address_hash_param": {
       "type": "string"
      }
     }
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "fee": {
       "type": "string"
      },
      "hash": {
       "type": "string"
      },
      "sort": {
       "type": "string"
      },
      "index": {
       "type": "string"
      },
      "order": {
       "type": "string"
      },
      "value": {
       "type": "string"
      },
      "filter": {
       "type": "string"
      },
      "inserted_at": {
       "type": "string"
      },
      "items_count": {
       "type": "integer"
      },
      "block_number": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/blockscout-address-transactions-api-2a8220f6/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)