> ## Documentation Index
> Fetch the complete documentation index at: https://docs.polygon.technology/llms.txt
> Use this file to discover all available pages before exploring further.

# Estimate gas fees

> How to query Polygon Gas Station for gas price recommendations, and how to interpret the response.

<Warning>
  **Polygon zkEVM is deprecated.** It is no longer recommended for new integrations and references on this page reflect historical context only. New chains and applications should use Polygon Chain or [Polygon CDK](/chain-development/cdk/index).
</Warning>

Polygon Gas Station provides gas price recommendations for Polygon Chain mainnet and Amoy testnet. It queries the RPC for `eth_feeHistory` and computes the 10th, 25th, and 50th percentiles of priority fees across the last 15 blocks. These become the `safeLow`, `standard`, and `fast` predictions.

<Note>
  On Polygon Chain mainnet, a minimum priority fee of 25 gWei is required.
</Note>

## Query gas price recommendations

Send a `GET` request to the endpoint for your target network.

### Testnet endpoints

* Amoy testnet: `https://gasstation.polygon.technology/amoy`
* zkEVM Cardona: `https://gasstation.polygon.technology/zkevm/cardona`

<CodeGroup>
  ```bash cURL theme={null}
  curl https://gasstation.polygon.technology/amoy
  ```

  ```javascript JavaScript theme={null}
  fetch('https://gasstation.polygon.technology/amoy')
    .then(response => response.json())
    .then(json => console.log(json))
  ```

  ```python Python theme={null}
  import requests
  requests.get('https://gasstation.polygon.technology/amoy').json()
  ```
</CodeGroup>

### Mainnet endpoints

* Polygon Chain mainnet: `https://gasstation.polygon.technology/v2`
* zkEVM mainnet: `https://gasstation.polygon.technology/zkevm`

<CodeGroup>
  ```bash cURL theme={null}
  curl https://gasstation.polygon.technology/v2
  ```

  ```javascript JavaScript theme={null}
  fetch('https://gasstation.polygon.technology/v2')
    .then(response => response.json())
    .then(json => console.log(json))
  ```

  ```python Python theme={null}
  import requests
  requests.get('https://gasstation.polygon.technology/v2').json()
  ```
</CodeGroup>

## Response format

Example response:

```json theme={null}
{
  "safeLow": {
    "maxPriorityFee":30.7611840636,
    "maxFee":30.7611840796
    },
  "standard": {
    "maxPriorityFee":32.146027800733336,
    "maxFee":32.14602781673334
    },
  "fast": {
    "maxPriorityFee":33.284344224133335,
    "maxFee":33.284344240133336
    },
  "estimatedBaseFee":1.6e-8,
  "blockTime":6,
  "blockNumber":24962816
}
```

| Field              | Description                                                        |
| ------------------ | ------------------------------------------------------------------ |
| `safeLow`          | Conservative fee estimate (GWei). Use for non-urgent transactions. |
| `standard`         | Moderate fee estimate (GWei). Suitable for most transactions.      |
| `fast`             | Higher fee estimate (GWei). Use when faster inclusion is needed.   |
| `estimatedBaseFee` | Current base fee in GWei.                                          |
| `blockNumber`      | The latest block mined when the recommendation was made.           |
| `blockTime`        | Average block time in seconds for the network.                     |

## Related

* **[Polygon Chain overview](/pos/overview)**: how gas, finality, and the EIP-1559 base fee work on Polygon.
* **[Polygon RPC endpoints](/pos/reference/rpc-endpoints)**: connect to the network from a wallet or backend.
* **[Open Money Stack Payments API](/payments/overview)**: if you're estimating gas for payment flows, the OMS handles fee selection and gas accounting for you.