Patronus AI

aid: patronus-ai
url: https://raw.githubusercontent.com/api-evangelist/patronus-ai/refs/heads/main/apis.yml
name: Patronus AI
type: Index
accessModel:
  pricing: free
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Free
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/patronus-ai.png
tags:
- LLM Evaluation
- Guardrails
- Judges
- Hallucination Detection
- AI Research
- Benchmarks
- API
description: Patronus AI is an evaluation and guardrails platform for production LLM applications and AI agents. It combines
  an API-first evaluation service with Python and TypeScript SDKs, in-house judge models (Lynx for hallucination detection,
  Glider for reasoning evaluation, Percival for agent debugging), and a portfolio of open benchmarks and datasets including
  FinanceBench, BLUR, and RL environments. Customers use Patronus for experimentation, production monitoring, RAG and agent
  evaluation, dataset generation, and human-in-the-loop annotation.
created: '2026-05-23'
modified: '2026-05-23'
specificationVersion: '0.19'
apis:
- aid: patronus-ai:patronus-evaluation-api
  name: Patronus Evaluation API
  tags:
  - LLM Evaluation
  - Judges
  - API
  - Scoring
  humanURL: https://docs.patronus.ai/docs
  properties:
  - url: https://docs.patronus.ai/docs
    type: Documentation
  - url: https://docs.patronus.ai/reference
    type: APIReference
  description: The Patronus Evaluation API scores LLM outputs against built-in and custom evaluators covering hallucination,
    answer relevance, context utilization, safety, and PII. Evaluators can be invoked synchronously for guardrails, asynchronously
    for batch scoring, and as part of experiment runs that compare prompt and model variants over datasets.
- aid: patronus-ai:patronus-python-sdk
  name: Patronus Python SDK
  tags:
  - SDK
  - Python
  - Tracing
  - Evaluation
  humanURL: https://github.com/patronus-ai/patronus-py
  properties:
  - url: https://github.com/patronus-ai/patronus-py
    type: SourceCode
  - url: https://pypi.org/project/patronus/
    type: SDKs
  description: The Patronus Python SDK provides decorators and clients for instrumenting LLM applications, running evaluators
    inline, recording traces, and pushing experiments to the Patronus platform.
- aid: patronus-ai:patronus-typescript-sdk
  name: Patronus TypeScript SDK
  tags:
  - SDK
  - TypeScript
  - JavaScript
  - Tracing
  humanURL: https://github.com/patronus-ai/patronus-typescript
  properties:
  - url: https://github.com/patronus-ai/patronus-typescript
    type: SourceCode
  description: The Patronus TypeScript SDK brings the same evaluation, tracing, and experiment workflows to Node.js and browser
    environments used by JavaScript-first AI applications.
- aid: patronus-ai:lynx
  name: Lynx
  tags:
  - Hallucination Detection
  - Judge Model
  - Open Source
  humanURL: https://www.patronus.ai/blog/lynx-state-of-the-art-open-source-hallucination-detection-model
  properties:
  - url: https://www.patronus.ai/blog/lynx-state-of-the-art-open-source-hallucination-detection-model
    type: Documentation
  - url: https://huggingface.co/PatronusAI/Llama-3-Patronus-Lynx-70B-Instruct
    type: ModelWeights
  description: Lynx is Patronus's open-weights hallucination detection model published on Hugging Face. It is positioned as
    state-of-the-art on hallucination benchmarks and is available both as downloadable weights and as a hosted judge inside
    the Patronus Evaluation API.
- aid: patronus-ai:glider
  name: Glider
  tags:
  - Judge Model
  - Reasoning Evaluation
  - Open Source
  humanURL: https://www.patronus.ai/blog/glider
  properties:
  - url: https://www.patronus.ai/blog/glider
    type: Documentation
  description: Glider is Patronus's small judge model for evaluating reasoning chains and rubric-based scoring with low latency
    and cost relative to large frontier judges.
- aid: patronus-ai:percival
  name: Percival
  tags:
  - Agent Debugging
  - Tracing
  - Evaluation
  humanURL: https://www.patronus.ai/percival
  properties:
  - url: https://www.patronus.ai/percival
    type: Documentation
  description: Percival is Patronus's agent debugging product that ingests agent traces and surfaces failure modes, tool misuse,
    and reasoning errors across multi-step runs.
- aid: patronus-ai:financebench
  name: FinanceBench
  tags:
  - Benchmark
  - Dataset
  - Finance
  - Research
  humanURL: https://www.patronus.ai/announcements/financebench-benchmark
  properties:
  - url: https://www.patronus.ai/announcements/financebench-benchmark
    type: Documentation
  - url: https://github.com/patronus-ai/financebench
    type: SourceCode
  description: FinanceBench is an open benchmark of 10,000 financial question-answer pairs grounded in public filings, used
    to evaluate LLM performance on financial document understanding.
common:
- type: DomainSecurity
  url: security/patronus-ai-domain-security.yml
- type: Website
  url: https://www.patronus.ai/
- type: Documentation
  url: https://docs.patronus.ai/
- type: APIReference
  url: https://docs.patronus.ai/reference
- type: Blog
  url: https://www.patronus.ai/blog
- type: Pricing
  url: https://www.patronus.ai/pricing
- type: Login
  url: https://app.patronus.ai/
- type: GitHubOrganization
  url: https://github.com/patronus-ai
- type: Research
  url: https://www.patronus.ai/research
- type: Contact
  url: mailto:contact@patronus.ai
- type: Security
  url: mailto:security@patronus.ai
- type: Features
  data:
  - name: Evaluation API
    description: Hosted API for running built-in and custom evaluators on LLM inputs and outputs.
  - name: Lynx Hallucination Detection
    description: State-of-the-art open-weights hallucination judge available as a hosted evaluator.
  - name: Glider Judge
    description: Small reasoning-focused judge for rubric-based evaluation at production latency.
  - name: Percival Agent Debugger
    description: Agent trace analysis surfacing failure modes, tool misuse, and reasoning errors.
  - name: Experimentation
    description: Compare prompts, models, and configurations across datasets with side-by-side outputs.
  - name: Production Monitoring
    description: Real-time alerts, tracing, and dashboards for live LLM applications.
  - name: Dataset Generation
    description: Synthetic dataset creation including red-teaming sets for RAG and agent systems.
  - name: Human Annotation
    description: Workflows for human-in-the-loop labeling and reviewer agreement tracking.
- type: UseCases
  data:
  - name: RAG Evaluation
    description: Score retrieval and generation quality in RAG applications across faithfulness, relevance, and context.
  - name: Agent Debugging
    description: Trace and diagnose failures in multi-step agentic systems using Percival.
  - name: Model Benchmarking
    description: Benchmark candidate models against domain-specific datasets such as FinanceBench.
  - name: Guardrails
    description: Apply Patronus judges as runtime guardrails on LLM responses.
  - name: Regression Testing
    description: Detect quality regressions across prompt, model, and configuration changes.
- type: Integrations
  data:
  - name: OpenAI
    description: Score outputs from OpenAI models inside Patronus experiments and monitoring.
  - name: Anthropic
    description: Evaluate Anthropic Claude outputs using Patronus judges.
  - name: LangChain
    description: SDK integrations for LangChain chains and agents.
  - name: LlamaIndex
    description: Evaluate LlamaIndex RAG pipelines with Patronus evaluators.
  - name: OpenTelemetry
    description: Ingest OTel-compatible LLM traces for evaluation and monitoring.
  - name: Hugging Face
    description: Lynx and Glider weights are distributed via Hugging Face for self-hosting.
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com