# Blockscout Multichain Blockchain Search

> Blockscout Multichain Blockchain Search is a paid API for AI agents from api.blockscout.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-10).

Search for transactions, addresses, tokens, and dapps across multiple blockchain networks by chain ID using a query string

## Facts

- Endpoint: GET https://api.blockscout.com/%7Bchain_id%7D/api/v2/search
- Price: $0.002/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-blockchain-search-64e7976f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_eehn4iupNeG_o2ueKHbnV

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-blockchain-search-64e7976f
```

Example prompt: Can you search Blockscout for the address 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on Ethereum (chain ID 1) and tell me what comes up?

## When to prefer this

Use this endpoint when you need to search across blockchain data (addresses, transactions, tokens, contracts, ENS names) on a specific chain supported by Blockscout, especially when you need a flexible keyword or identifier search rather than a direct structured lookup. Prefer this over chain-specific explorers when you want a unified API interface with consistent response format across multiple EVM-compatible networks.

## Known failure modes

- Invalid or unsupported chain_id returns empty results or an error
- Empty or overly broad query string returns too many irrelevant results
- Malformed address or hash returns no matching items
- Rate limiting or payment failure (402) if USDC balance is insufficient
- Chain not indexed by Blockscout returns no results
- Pagination token mismatch causes unexpected result sets

## 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 paginated JSON response containing an array of matching items (addresses, tokens, transactions, blocks, contracts, ENS domains, dapps, labels, user operations) relevant to the query, along with next_page_params for fetching additional results.

## 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": {
      "q": {
       "type": "string"
      },
      "blob": {
       "type": "object"
      },
      "block": {
       "type": "object"
      },
      "label": {
       "type": "object"
      },
      "token": {
       "type": "object"
      },
      "address": {
       "type": "object"
      },
      "contract": {
       "type": "object"
      },
      "ens_domain": {
       "type": "object"
      },
      "metadata_tag": {
       "type": "object"
      },
      "tac_operation": {
       "type": "object"
      },
      "user_operation": {
       "type": "object"
      },
      "next_page_params_type": {
       "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": [
   {}
  ],
  "next_page_params": {}
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/blockscout-multichain-blockchain-search-64e7976f/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)