APIForgeAPI Observability,\nDone Right.

Understand your APIs. Detect drifts. Ship with confidence. Local-first, privacy-first, up and running in 5 minutes.

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Privacy-first by architecture

The SDK never reads request bodies, headers, or tokens. Route parameters are captured as patterns only — never real values. In local mode, zero data leaves your machine.

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Local-first by default

Works completely offline. No account, no cloud configuration, no credit card. Just install and one line of code. Your data stays in a SQLite file on your server.

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Up and running in 5 minutes

One middleware, zero mandatory config. Dashboard auto-starts on port 4242. P50/P90/P99 latency, error rates, Health Score — all visible immediately.

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Automatic insights

Plain-language alerts generated from your traffic — no dashboards to configure. Anomaly detection, dead endpoint identification, before/after release comparison.

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Cloud mode — optional

Send metrics to the APIForge SaaS instead of storing locally. One extra parameter, no infrastructure to manage. Your local mode setup works unchanged.

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Node.js SDK — apiforgejs

Drop-in Express.js middleware. Requires Node.js ≥ 22.5. Install via npm.

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Python SDK — apiforgepy

Drop-in FastAPI / Starlette middleware. Requires Python ≥ 3.11. Install via pip.