Proxy Billing

Kylon proxy calls are checked and recorded against workspace credits where applicable.

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Preflight checks

Before a proxy request is sent to a provider, Kylon may check:

• Whether the workspace has enough credits
• Whether the request is allowed by a script-level credit policy
• Whether the agent has access to the requested provider capability

If a credit check fails, the proxy returns 402 payment_required.

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Fixed-cost endpoints

Some endpoints have fixed credit costs. Examples include:

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Dynamic-cost endpoints

Some providers are accounted from returned usage:

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Streaming requests

For streaming model requests, Kylon records usage after the stream completes or disconnects. If the client disconnects, the request is stopped and recorded as disconnected.

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Error accounting

Failed provider requests are still recorded with status code, provider, endpoint, model when available, and a short error summary. This helps teams understand which calls are failing and why.