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Welcome

The VelumX Relayer API provides the infrastructure layer for gasless transaction sponsorship on Stacks. While we recommend using the VelumX SDK, you can interact with the Relayer directly via these REST endpoints.

VelumX Relayer Endpoints

Explore the interactive API playground

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Authentication

All API endpoints require a valid project API Key passed in the x-api-key header. You can generate and manage your keys in the VelumX Dashboard. 
curl -X GET "https://api.velumx.xyz/api/v1/config" \
     -H "x-api-key: YOUR_API_KEY"
[!WARNING] Never expose your velumx_live_ keys in client-side code. Always use a backend proxy for production environments.