Prevalpreval
Feature

SDK in 3 Lines

Install. Init. Trace. That’s it.

pip install preval — three lines of code instruments OpenAI, LangChain, CrewAI, LiveKit, Deepgram, or any OpenTelemetry-compatible application. Auto-traces every LLM call with zero code changes.

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PythonNode.js
1import preval
2 
3p = preval.init(
4    api_key="prz_...",
5    project="my-agent"
6)
7p.init_opentelemetry()
8 
9# All LLM calls now traced

Key Capabilities

Everything you need to integrate with confidence.

+Python + Node.js SDKs
+OpenTelemetry auto-instrumentation
+OpenAI/LangChain/CrewAI wrappers
+LiveKit + Deepgram + Vapi plugins
+Async batch transport
+BYOK (Bring Your Own Keys)

Ready to integrate?

Start for free. No credit card required.

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3lines to instrument everything