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

# Polygon

The Polygon API provides secure, low-latency access to the Polygon network through an EVM-compatible **JSON-RPC** interface — fully compatible with common EVM tooling and SDKs (web3.js, ethers.js, viem, web3.py). FastNode operates **full and archive** nodes for this network, so you can read on-chain data and submit transactions without running your own infrastructure.

**Chain ID:** `137`

## Endpoints

| Environment | Endpoint                                            |
| ----------- | --------------------------------------------------- |
| Mainnet     | `https://polygon.fastnode.cc/YOUR-API-KEY/`         |
| Testnet     | `https://polygon-testnet.fastnode.cc/YOUR-API-KEY/` |
| Archive     | `https://polygon-archive.fastnode.cc/YOUR-API-KEY/` |
| WebSocket   | `wss://polygon.fastnode.cc/YOUR-API-KEY`            |

## Example request

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

```bash
curl --location 'https://polygon.fastnode.cc/YOUR-API-KEY/' \
  --header 'Content-Type: application/json' \
  --data '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "eth_blockNumber",
    "params": []
  }'
```

{% endtab %}

{% tab title="Python" %}

```python
import requests

url = "https://polygon.fastnode.cc/YOUR-API-KEY/"
payload = {"jsonrpc": "2.0", "id": 1, "method": "eth_blockNumber", "params": []}
print(requests.post(url, json=payload).json())
```

{% endtab %}
{% endtabs %}

**Response**

```json
{ "jsonrpc": "2.0", "id": 1, "result": "0x1412d5b" }
```

## Common methods

| Method                      | Description                                               |
| --------------------------- | --------------------------------------------------------- |
| `eth_blockNumber`           | Returns the latest block number.                          |
| `eth_chainId`               | Returns the chain ID.                                     |
| `eth_getBalance`            | Returns the balance of an address at a given block.       |
| `eth_call`                  | Executes a read-only call without creating a transaction. |
| `eth_estimateGas`           | Estimates gas for a transaction.                          |
| `eth_gasPrice`              | Returns the current gas price.                            |
| `eth_getLogs`               | Returns event logs matching a filter.                     |
| `eth_getTransactionByHash`  | Returns transaction details by hash.                      |
| `eth_getTransactionReceipt` | Returns the receipt of a mined transaction.               |
| `eth_sendRawTransaction`    | Broadcasts a signed transaction.                          |
| `eth_getBlockByNumber`      | Returns block data by number.                             |
| `net_version`               | Returns the network ID.                                   |

{% hint style="info" %}
The table above lists the most-used methods. For the complete method set, see the [Ethereum JSON-RPC specification](https://ethereum.org/en/developers/docs/apis/json-rpc/). All standard methods are supported unless noted otherwise.
{% endhint %}

***

Need higher limits, archive depth, or methods not enabled on the shared plan? Contact **<support@fastnode.io>** or deploy a dedicated node from the dashboard.


---

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