:::info[Info]
The [Rootstock RPC API](https://rpc.rootstock.io/) is available on
:::
## Get A FREE Account
Visit the [Rootstock RPC API](https://rpc.rootstock.io/) to create a **free** account, and click on _Sign up_
## Get An API Key
To get an API key:
Log in to the dashboard, and click on _New API key_:
````mdx-code-block
````
Choose a name to identify your `apikey`, and the Network (either `Testnet` or `Mainnet`). You can also add a description (optional). Click on **Create**.
````mdx-code-block
````
## Make First API Call
Click on the newly created `apikey` to get the details:
````mdx-code-block
````
You can make your first api call by using one of the provided examples, or simply by adding a url and `apikey` to your application.
````mdx-code-block
````
### Example Request
```shell
curl --location --request POST 'https://rpc.testnet.rootstock.io/' \
--header 'Content-Type: application/json' \
--data ' {
"jsonrpc": "2.0",
"method": "eth_blockNumber",
"params": [],
"id": 0
}'
```
**Response:**
```text
{"jsonrpc":"2.0","id":0,"result":"0x4b7eca"}
```
> The daily limit is 25,000 requests per user, and each user can have up to 4 API keys, which allows an easy differentiation for different applications the user wants to test.
## Get Support
Join the [Rootstock Discord](https://rootstock.io/discord) to get support or give feedback.
## Useful Links
- Supported [JSON RPC Methods](/node-operators/json-rpc/methods/)
- [Quick Start Guide with Hardhat](/developers/smart-contracts/hardhat/)
- [rBTC Faucet](https://faucet.rootstock.io/)
