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The proxy capabilities endpoint tells you which configuration options are valid for a product. The point of calling it is to discover the valid configuration surface at runtime rather than hardcoding a list of options that may change. All requests go to https://api.nodemaven.com/api/v2/base/ and carry the header Authorization: x-api-key YOUR_API_KEY. See the NodeMaven API overview for the shared basics.

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Endpoint

Call this before you assemble a proxy string, and build the string from what comes back. That way a configuration option you did not know about, or one that is not valid for the product you are using, does not turn into a failed connection you have to debug. GET /proxy-capabilities/ can return 422. Read the response body for the reason.
  • Proxy string explains how the configuration options you discover here are expressed in a username.
  • IP filter modes covers one of the configuration choices in detail.