Instant xDai API access is available with Ankr. The free tier includes up to 100K requests/day, and you can connect to a Nethermind Archive or Fast node with JSON RPC or Websockets.
2) Enter a project name, network (keep as mainnet) and press next. This is for tracking and organizing your projects in the dashboard.
3) Choose your authentication method. For basic authentication you will select a username and password. You can also use token authentication and a token is automatically created.
4) Once you've created a project, you will see it in the API menu. Click on a project to view the details.
5) On the details page you will see your API endpoint and wss link. Click on the copy icon to get the endpoint.
Querying the xDai Chain
Example: eth_blockNumber query
This example uses token authentication with the copied API endpoint, so no need to specify username/password. We query the latest block number using the eth_blockNumber method and no parameters.