# Blockscout Multichain Address Lookup

> Blockscout Multichain Address Lookup is a paid API for AI agents from api.blockscout.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-13).

Retrieves a paginated list of blockchain addresses with balances, transaction counts, tags, and metadata for a specified chain

## Facts

- Endpoint: GET https://api.blockscout.com/%7Bchain_id%7D/api/v2/addresses
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/blockscout-multichain-address-lookup-ae6c0c52
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_j5CATsilIGPF-E4iYvEci

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-multichain-address-lookup-ae6c0c52
```

Example prompt: Pull up the list of addresses on Ethereum mainnet from Blockscout — sort by transaction count descending and show me the first 25 results with their balances, ENS names, and whether any are flagged as scams.

## When to prefer this

Choose this endpoint when you need structured address-level data (balances, tags, contract info, ENS names) across multiple EVM-compatible chains via a single unified API. Prefer it over chain-specific RPC calls when you need enriched metadata like scam flags, public tags, proxy type, and reputation — information not available from raw node queries.

## Known failure modes

- Invalid or unsupported chain_id returns 404 or empty result
- Malformed address hash filter returns 400 bad request
- Rate limiting or payment failure returns 402 Payment Required
- Pagination params out of range may return empty items array
- Chain not indexed by Blockscout returns no data

## 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

Returns a paginated list of address objects each containing: hash, name, coin balance, transaction count, contract status, verification status, proxy type, ENS domain name, public/private/watchlist tags, implementation addresses, reputation score, and scam flag. Also includes total supply, exchange rate, and next-page pagination params.

## 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"
      }
     }
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "hash": {
       "type": "string"
      },
      "sort": {
       "type": "string"
      },
      "order": {
       "type": "string"
      },
      "items_count": {
       "type": "integer"
      },
      "transactions_count": {
       "type": "string"
      },
      "fetched_coin_balance": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "items": [
   {
    "hash": "string",
    "name": "string",
    "is_scam": true,
    "metadata": {},
    "proxy_type": "string",
    "reputation": "string",
    "is_contract": true,
    "is_verified": true,
    "public_tags": [
     {
      "label": "string",
      "address_hash": "string",
      "display_name": "string"
     }
    ],
    "coin_balance": "string",
    "private_tags": [
     {
      "label": "string",
      "address_hash": "string",
      "display_name": "string"
     }
    ],
    "ens_domain_name": "string",
    "implementations": [
     {
      "name": "string",
      "address_hash": "string"
     }
    ],
    "watchlist_names": [
     {
      "label": "string",
      "display_name": "string"
     }
    ],
    "transactions_count": {}
   }
  ],
  "total_supply": "string",
  "exchange_rate": "string",
  "next_page_params": {}
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/blockscout-multichain-address-lookup-ae6c0c52/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)