block_search - Cosmos

Example code for the block_search JSON-RPC method. Complete guide on how to use block_search JSON-RPC in GetBlock Web3 documentation.

Searches blocks matching a CometBFT event query against block-level events (BeginBlock / EndBlock events). Use this to find blocks where specific app-level events fired, e.g. validator slashings or governance proposals concluding.

Parameters

Parameter	Type	Required	Description
query	string	Yes	Event query string
page	integer	No	Page number (default: 1)
per_page	integer	No	Results per page (default: 30, max: 100)
order_by	string	No	Sort order: "asc" or "desc"

Request Example

cURL

# JSON-RPC over HTTP POST (canonical)
curl --location --request POST 'https://go.getblock.io/<ACCESS-TOKEN>/block_search' \
--header 'Content-Type: application/json' \
--data-raw '{
    "jsonrpc": "2.0",
    "method": "block_search",
    "params": {
        "query": "active_proposal.proposal_status='2'",
        "page": 1,
        "per_page": 30,
        "order_by": "desc"
    },
    "id": "getblock.io"
}'

# URI over HTTP GET (alternate, for simple methods)
curl --location --request GET 'https://go.getblock.io/<ACCESS-TOKEN>/block_search?query="active_proposal.proposal_status='2'"&page=1&per_page=30&order_by="desc"'

JavaScript (Axios)

Python (Requests)

Rust (Reqwest)

Response Example

{
    "jsonrpc": "2.0",
    "id": "getblock.io",
    "result": {
        "blocks": [
            {
                "block_id": {
                    "hash": "6E2A2A6FE7A5B4C2D4E6F8A0B2C4D6E8F0A2C4E6F8B0D2E4F6A8C0E2F4B6D8E0",
                    "parts": {
                        "total": 1,
                        "hash": "..."
                    }
                },
                "block": {
                    "header": {
                        "chain_id": "cosmoshub-4",
                        "height": "23456789",
                        "time": "2026-05-26T13:42:18.5273Z"
                    }
                }
            }
        ],
        "total_count": "1"
    }
}

Response Parameters

Field	Type	Description
result.blocks	array	Matching blocks
result.blocks[].block_id.hash	string	Block hash
result.blocks[].block.header.height	string	Block height
result.total_count	string	Total matching blocks across all pages

Use Cases

• Finding blocks where validators were slashed

• Detecting blocks where governance proposals concluded

• Tracking block-level events that aren't tied to a specific transaction

Error Handling

Status Code	Error Message	Cause
404	not found	Missing or invalid <ACCESS-TOKEN>
-32602	Invalid params	Request parameters are missing or malformed
-32603	Internal error	Server-side error while processing the request
429	Too Many Requests	Rate limit exceeded for your plan

SDK Integration

CosmJS

import { Tendermint37Client, HttpClient } from '@cosmjs/tendermint-rpc';

const httpClient = new HttpClient('https://go.getblock.io/<ACCESS-TOKEN>/');
const client = await Tendermint37Client.create(httpClient);

// CosmJS exposes typed methods on the client (e.g. client.status(), client.block()).
// For raw access to any RPC method:
const result = await httpClient.execute({"jsonrpc": "2.0", "id": "getblock.io", "method": "block_search", "params": {"query": "active_proposal.proposal_status='2'", "page": 1, "per_page": 30, "order_by": "desc"}});
console.log(result);

cosmpy / requests