Developer Builds No-Cost AI Chat Using User-Supplied API Keys on Cloudflare

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A developer created an AI chat interface with no infrastructure cost by utilizing Cloudflare Workers AI. The system forwards user requests using the user's own API credentials, eliminating the need for a paid service tier. The backend, built in an afternoon, validates tokens via Cloudflare's API and streams responses directly. Key challenges included improving user error messages for incorrect credentials and handling partial data during live streaming responses.

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