> For the complete documentation index, see [llms.txt](https://docs.getblock.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.getblock.io/api-reference/cosmos/tx-cosmos.md).

# tx - Cosmos

Returns a transaction by its hash, with optional Merkle proof of inclusion. The hash is the hex-encoded SHA-256 of the canonical transaction bytes (uppercase, no `0x` prefix).

## Parameters

| Parameter | Type    | Required | Description                                                    |
| --------- | ------- | -------- | -------------------------------------------------------------- |
| hash      | string  | Yes      | Transaction hash (uppercase hex, 32 bytes)                     |
| prove     | boolean | No       | If `true`, include the inclusion Merkle proof (default: false) |

## Request Example

{% tabs %}
{% tab title="cURL" %}

```bash
# JSON-RPC over HTTP POST (canonical)
curl --location --request POST 'https://go.getblock.io/<ACCESS-TOKEN>/' \
--header 'Content-Type: application/json' \
--data-raw '{
    "jsonrpc": "2.0",
    "method": "tx",
    "params": {
        "hash": "B5C8E4F1A6D3B9C2E5F8A1D4B7C0E3F6A9D2B5C8E1F4A7D0B3C6E9F2A5D8B1C4",
        "prove": false
    },
    "id": "getblock.io"
}'

# URI over HTTP GET (alternate, for simple methods)
curl --location --request GET 'https://go.getblock.io/<ACCESS-TOKEN>/tx?hash="B5C8E4F1A6D3B9C2E5F8A1D4B7C0E3F6A9D2B5C8E1F4A7D0B3C6E9F2A5D8B1C4"&prove=false'
```

{% endtab %}

{% tab title="JavaScript (Axios)" %}

```javascript
import axios from 'axios';

const data = JSON.stringify({
    "jsonrpc": "2.0",
    "method": "tx",
    "params": {
        "hash": "B5C8E4F1A6D3B9C2E5F8A1D4B7C0E3F6A9D2B5C8E1F4A7D0B3C6E9F2A5D8B1C4",
        "prove": false
    },
    "id": "getblock.io"
});

const config = {
    method: 'post',
    url: 'https://go.getblock.io/<ACCESS-TOKEN>/',
    headers: {
        'Content-Type': 'application/json'
    },
    data: data
};

axios(config)
    .then(response => console.log(JSON.stringify(response.data, null, 2)))
    .catch(error => console.log(error));
```

{% endtab %}

{% tab title="Python (Requests)" %}

```python
import requests
import json

url = "https://go.getblock.io/<ACCESS-TOKEN>/"

payload = json.dumps({
    "jsonrpc": "2.0",
    "method": "tx",
    "params": {
        "hash": "B5C8E4F1A6D3B9C2E5F8A1D4B7C0E3F6A9D2B5C8E1F4A7D0B3C6E9F2A5D8B1C4",
        "prove": false
    },
    "id": "getblock.io"
})

headers = {
    'Content-Type': 'application/json'
}

response = requests.post(url, headers=headers, data=payload)
print(response.text)
```

{% endtab %}

{% tab title="Rust (Reqwest)" %}

```rust
use reqwest::Client;
use serde_json::json;

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let client = Client::new();

    let payload = json!({
        "jsonrpc": "2.0",
        "method": "tx",
        "params": {
                "hash": "B5C8E4F1A6D3B9C2E5F8A1D4B7C0E3F6A9D2B5C8E1F4A7D0B3C6E9F2A5D8B1C4",
                "prove": false
        },
        "id": "getblock.io"
});

    let response = client
        .post("https://go.getblock.io/<ACCESS-TOKEN>/")
        .header("Content-Type", "application/json")
        .json(&payload)
        .send()
        .await?;

    let result: serde_json::Value = response.json().await?;
    println!("{:#?}", result);

    Ok(())
}
```

{% endtab %}
{% endtabs %}

## Response Example

{% code overflow="wrap" %}

```json
{
    "jsonrpc": "2.0",
    "id": "getblock.io",
    "result": {
        "hash": "B5C8E4F1A6D3B9C2E5F8A1D4B7C0E3F6A9D2B5C8E1F4A7D0B3C6E9F2A5D8B1C4",
        "height": "23456789",
        "index": 0,
        "tx_result": {
            "code": 0,
            "data": "EisKKS9jb3Ntb3MuYmFuay52MWJldGExLk1zZ1NlbmRSZXNwb25zZQ==",
            "log": "[{\"events\":[{\"type\":\"transfer\",\"attributes\":[...]}]}]",
            "gas_wanted": "200000",
            "gas_used": "67890",
            "events": []
        },
        "tx": "Co0BCooBChwvY29zbW9zLmJhbmsudjFiZXRhMS5Nc2dTZW5kEmoKLWNvc21vczF0NnJsZ2Y4MGpkOHRhbnBubnZtbXhmcWRjbTljbjd3Y3RyczdoaxItY29zbW9zMWdoZDc1M3NoamVjajRpdjJ4Mmk4eHJrenphbnpqdnZjMjJ4MmtuGgoKBXVhdG9tEgExEnIKWg=="
    }
}
```

{% endcode %}

## Response Parameters

| Field                       | Type    | Description                                               |
| --------------------------- | ------- | --------------------------------------------------------- |
| result.hash                 | string  | Transaction hash (echoed)                                 |
| result.height               | string  | Block height that included this transaction               |
| result.index                | integer | Index of the transaction within the block                 |
| result.tx\_result.code      | integer | ABCI response code: `0` for success, non-zero for failure |
| result.tx\_result.gas\_used | string  | Actual gas consumed                                       |
| result.tx\_result.events    | array   | Events emitted by the transaction                         |
| result.tx                   | string  | Base64-encoded transaction bytes                          |

## Use Cases

* Looking up a transaction after broadcast to confirm inclusion
* Wallet history flows showing past transactions by hash
* Decoding transaction details for explorers

## 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

{% tabs %}
{% tab title="CosmJS" %}

```javascript
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": "tx", "params": {"hash": "B5C8E4F1A6D3B9C2E5F8A1D4B7C0E3F6A9D2B5C8E1F4A7D0B3C6E9F2A5D8B1C4", "prove": false}});
console.log(result);
```

{% endtab %}

{% tab title="cosmpy / requests" %}

```python
# cosmpy wraps Cosmos REST / gRPC. For raw CometBFT RPC access, use requests.
import requests

response = requests.post('https://go.getblock.io/<ACCESS-TOKEN>/', json={
    'jsonrpc': '2.0',
    'id': 'getblock.io',
    'method': 'tx',
    'params': {"hash": "B5C8E4F1A6D3B9C2E5F8A1D4B7C0E3F6A9D2B5C8E1F4A7D0B3C6E9F2A5D8B1C4", "prove": false}
}})
print(response.json())
```

{% endtab %}
{% endtabs %}


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.getblock.io/api-reference/cosmos/tx-cosmos.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.