# Blockscout Multichain Quick Search

> Blockscout Multichain Quick Search is a paid API for AI agents from api.blockscout.com, paid per call via x402, $0.012/call, status unknown (last checked 2026-09-10).

Performs a fast cross-chain search across multiple blockchain networks, returning matching transactions, addresses, tokens, NFTs, blocks, domains, and dapps within a specified cluster

## Facts

- Endpoint: GET https://api.blockscout.com/services/multichain/api/v1/clusters/%7Bcluster_id%7D/search:quick
- Price: $0.012/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-10
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/blockscout-multichain-quick-search-71162103
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_TtgEMJzhuNUpZa1BpxsQD

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-quick-search-71162103
```

Example prompt: Search Blockscout's multichain explorer for the address 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 across the Ethereum cluster and show me what transactions, tokens, and domains are associated with it.

## When to prefer this

Use this endpoint when you need to search for blockchain entities (addresses, transactions, tokens, NFTs, domains, dapps) across multiple chains simultaneously within a cluster, rather than querying each chain individually. Ideal when the user does not know which specific chain an entity lives on, or wants comprehensive cross-chain visibility in a single call. Prefer over single-chain explorers when multichain coverage is required.

## Known failure modes

- Missing or invalid cluster_id returns an error or empty results
- Empty search query returns no results
- Query too short or ambiguous may return irrelevant matches
- Rate limiting or payment failure (HTTP 402) if USDC payment not attached
- Cluster ID not recognized returns 404 or empty response
- Chain data may be temporarily unavailable for some networks in the cluster

## 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 structured JSON object containing categorized matches across the cluster: addresses (with chain info, coin balance, domain names), transactions (hash and chain), tokens and NFTs (name, symbol, supply, holders, market cap, icon), blocks (hash, chain), block numbers, ENS/Web3 domains (with protocol info and expiry), and dapps (title, chain, logo, description).

## 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": {
      "cluster_id": {
       "type": "string"
      }
     }
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "q": {
       "type": "string"
      },
      "unlimited_per_chain": {
       "type": "boolean"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "nfts": [
   {
    "name": "string",
    "type": "string",
    "symbol": "string",
    "decimals": "string",
    "icon_url": "string",
    "chain_infos": {},
    "address_hash": "string",
    "total_supply": "string",
    "exchange_rate": "string",
    "holders_count": "string",
    "circulating_market_cap": "string"
   }
  ],
  "dapps": [
   {
    "id": "string",
    "logo": "string",
    "title": "string",
    "chain_id": "string",
    "short_description": "string"
   }
  ],
  "blocks": [
   {
    "hash": "string",
    "chain_id": "string",
    "hash_type": "string"
   }
  ],
  "tokens": [
   {
    "name": "string",
    "type": "string",
    "symbol": "string",
    "decimals": "string",
    "icon_url": "string",
    "chain_infos": {},
    "address_hash": "string",
    "total_supply": "string",
    "exchange_rate": "string",
    "holders_count": "string",
    "circulating_market_cap": "string"
   }
  ],
  "domains": [
   {
    "name": "string",
    "address": "string",
    "protocol": {
     "id": "string",
     "title": "string",
     "docs_url": "string",
     "icon_url": "string",
     "tld_list": [
      "string"
     ],
     "short_name": "string",
     "description": "string",
     "deployment_blockscout_base_url": "string"
    },
    "expiry_date": "string"
   }
  ],
  "addresses": [
   {
    "hash": "string",
    "domains": [
     {
      "name": "string",
      "protocol": {
       "id": "string",
       "title": "string",
       "docs_url": "string",
       "icon_url": "string",
       "tld_list": [
        "string"
       ],
       "short_name": "string",
       "description": "string",
       "deployment_blockscout_base_url": "string"
      }
     }
    ],
    "has_tokens": true,
    "chain_infos": {},
    "coin_balance": "string",
    "exchange_rate": "string",
    "has_interop_message_transfers": true
   }
  ],
  "transactions": [
   {
    "hash": "string",
    "chain_id": "string",
    "hash_type": "string"
   }
  ],
  "block_numbers": [
   {
    "chain_id": "string",
    "block_number": "string"
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/blockscout-multichain-quick-search-71162103/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)