<link href="/user/plugins/markdown-notices/assets/notices.css" type="text/css" rel="stylesheet"> <link href="/user/plugins/breadcrumbs/css/breadcrumbs.css" type="text/css" rel="stylesheet"> Alexander Tsemakh | Claude API Engineering Blog

Alexander Tsemakh

I run claude.ai-platform.space — a SaaS proxy that gives developers metered access to Claude through pooled subscriptions instead of per-token billing. This blog is what I learn shipping it.

I run Claude API Platform — a SaaS that gives developers access to Claude through a pool of subscription accounts (Max plans), rather than the official per-token API.

Why bother building yet another proxy? Because at high request volumes, subscription beats metered billing by 5–7×. We pass that saving to clients while keeping the experience identical to the Anthropic SDK.

This blog documents what I learn running it: how the OAuth pool rotates, what prompt caching actually does to bills, when Sonnet beats Opus, where things broke at 3 AM.

Reach out: github.com/cemahalexandr.

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