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Blockscout Multichain Block Number Search
x402
Blockscout Multichain Block Number 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).
Search for block numbers matching a query across multiple blockchain networks within a cluster using Blockscout's multichain explorer
Price / call$0.012
Success—
StatusUnknown
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 items each containing a chain_id and block_number where the search query matched, along with next_page_params (page_token and page_size) for fetching subsequent pages.
Example use cases
Cross-chain block confirmation lookup
“I need to find what block number a specific transaction hash was included in across Ethereum, Polygon, and Arbitrum — can you search Blockscout's multichain cluster 'evm-mainnet' for block numbers matching '0x4f3a9b2c1d' and show me 20 results?”
Multichain block audit trail
“For my compliance report, search Blockscout's cluster 'prod-cluster' for block numbers associated with address '0xdead...beef' on chain IDs 1 and 137, paginated at 25 per page.”
Block number verification across networks
“Can you check Blockscout's multichain search in cluster 'testnet-cluster' to find block numbers matching the token contract '0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48' on chain 1?”
Technical details
Endpoint
GEThttps://api.blockscout.com/services/multichain/api/v1/clusters/%7Bcluster_id%7D/search/block-numbersWhen to prefer
Use this endpoint when you need to find block numbers across multiple blockchain networks simultaneously using a single query, particularly when you have a cluster_id grouping the chains you care about. Prefer this over single-chain block explorers when doing cross-chain research, auditing, or verification tasks that span EVM-compatible networks.
Side effects
- Invalid or unknown cluster_id returns 404
- Missing required query parameter 'q' may return empty results or error
- Unsupported chain_id values may be silently ignored or return no results
- Payment failure (x402) if USDC balance is insufficient
- Rate limiting if too many requests are made in quick succession
- Large page_size values may be capped or cause slower responses
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"items": [
{
"chain_id": "string",
"block_number": "string"
}
],
"next_page_params": {
"page_size": 0,
"page_token": "string"
}
}
}Tags
x402
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