KeyFlint adds per-call billing for MCP servers with one decorator and auto-refunds
Ltx_23 · reddit · 2026-11-11
A developer released KeyFlint, an open toolkit to charge per call for MCP servers without marketplace cuts. A @metered(credits=5) decorator atomically deducts credits in SQLite WAL and auto-refunds on errors; a zero-code npx @keyflint/wrap wrapper handles any stdio server, with a .mcpb template for Claude Desktop extensions. Licenses are offline-verified Ed25519 tokens wired to your own Stripe/LemonSqueezy webhooks, with pip/npm/Go SDKs and a self-hosted gateway (BSL 1.1, Apache 2.0 in 2030).
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