# TruLens

**Canonical:** https://apis.io/apis/evals/trulens/  
**Provider:** Evals — https://apis.io/providers/evals/  
**Base URL:** https://www.trulens.org  
**Documentation:** https://www.trulens.org/

TruLens is one of 20 APIs that [Evals](https://apis.io/providers/evals/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Open-Source, RAG Triad, Feedback Functions, Snowflake, and OpenTelemetry. The published artifact set on APIs.io includes API documentation and a GitHub repository.

TruLens is an open-source evaluation and tracing platform for AI agents that helps developers "move from vibes to metrics." Its feedback-function library covers the RAG triad — groundedness (responses supported by retrieved content), context relevance (retrieved documents match the query), and answer relevance (responses address the user question) — plus coherence, comprehensiveness, toxicity, sentiment, fairness, and custom metrics. Integrates with OpenTelemetry traces and any agent framework.

## Machine-readable artifacts (2)

- **Documentation** — https://www.trulens.org/
- **GitHubRepository** — https://github.com/truera/trulens

## Other Evals APIs (12)

- [OpenAI Evals](https://apis.io/apis/evals/openai-evals/)
- [Inspect AI](https://apis.io/apis/evals/inspect-ai/)
- [Braintrust](https://apis.io/apis/evals/braintrust/)
- [LangSmith Evaluation](https://apis.io/apis/evals/langsmith-evaluation/)
- [Promptfoo](https://apis.io/apis/evals/promptfoo/)
- [Helicone](https://apis.io/apis/evals/helicone/)
- [Patronus AI](https://apis.io/apis/evals/patronus-ai/)
- [DeepEval (Confident AI)](https://apis.io/apis/evals/deepeval-confident-ai/)
- [Arize AI (Phoenix)](https://apis.io/apis/evals/arize-ai-phoenix/)
- [Galileo](https://apis.io/apis/evals/galileo/)
- [Humanloop](https://apis.io/apis/evals/humanloop/)
- [Weights and Biases Weave](https://apis.io/apis/evals/weights-and-biases-weave/)

## Tags

Open-Source, RAG Triad, Feedback Functions, Snowflake, OpenTelemetry

---

Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/evals/trulens/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/evals/.