## Documentation Index

Fetch the complete documentation index at: [/llms.txt](https://docs.relay.link/llms.txt)

Use this file to discover all available pages before exploring further.

cURL

```
curl --request POST \
  --url https://api.relay.link/transactions/index \
  --header 'Content-Type: application/json' \ 
  --data '\n{\n  "chainId": "<string>",\n  "txHash": "<string>"\n}\n'
```

```
const options = {  
  method: 'POST',  
  headers: {'Content-Type': 'application/json'},  
  body: JSON.stringify({chainId: '<string>', txHash: '<string>'})
};

fetch('https://api.relay.link/transactions/index', options)  
  .then(res => res.json())  
  .then(res => console.log(res))  
  .catch(err => console.error(err));
```

```
import requests

url = "https://api.relay.link/transactions/index"

payload = {  
    "chainId": "<string>",  
    "txHash": "<string>"  
}
headers = {"Content-Type": "application/json"}

response = requests.post(url, json=payload, headers=headers)

print(response.text)
```

### Response Codes

- **200**
- **400**
- **404**

```
{  
  "message": "<string>"
}
```

```
{  
  "message": "<string>"
}
```

```
{  
  "message": "<string>"
}
```

#### Headers

- **x-api-key**  
  string  
  Optional API key for authentication and higher rate limits.

#### Body

- **application/json**

- **chainId**  
    string  
    required

- **txHash**  
    string  
    required

- **requestId**  
    string

#### Response

- **200**
  - **application/json**

- **Default Response**
  
    - **message**  
      string