The SDK does not construct provider-specific URLs from an API key. Include the
API key in each URL when your provider requires one.
Configuration
JSON-RPC providers
By default, the SDK uses public providers to make EVM read calls.
Many public providers are heavily throttled and are not suitable for high traffic.
For production use, we recommend setting up a custom JSON-RPC provider with your own API key.
Provide a mapping of chain IDs to full RPC URLs from your provider: