aid: langfuse url: https://raw.githubusercontent.com/api-evangelist/langfuse/refs/heads/main/apis.yml name: Langfuse x-type: company description: >- Langfuse is an open-source LLM engineering platform offering tracing, evaluations, prompt management, datasets, and metrics. The Langfuse API supports both self-hosted and multi-region cloud deployments (US, EU, Japan, HIPAA-compliant US) and integrates with LangChain, LlamaIndex, OpenTelemetry, and any LLM stack. image: https://kinlane-productions.s3.amazonaws.com/apis-json/apis-json-logo.jpg tags: - AI - LLM - Observability - Open Source - Evaluations created: '2026-05-08' modified: '2026-05-08' specificationVersion: '0.19' apis: - aid: langfuse:langfuse-tracing-api name: Langfuse Tracing API tags: - Tracing - OpenTelemetry - Ingestion image: https://kinlane-productions.s3.amazonaws.com/apis-json/apis-json-logo.jpg humanURL: https://langfuse.com/docs/tracing baseURL: https://cloud.langfuse.com/api/public properties: - url: https://langfuse.com/docs/tracing type: Documentation - url: https://api.reference.langfuse.com/ type: API Reference - url: openapi/langfuse-openapi.yml type: OpenAPI description: >- Ingest traces, observations (spans, generations, events), and scores into Langfuse. Recommended path is the OpenTelemetry endpoint; legacy ingestion API is also supported. Traces are the unit of usage billing. - aid: langfuse:langfuse-observations-api name: Langfuse Observations API tags: - Observations - Spans - Generations image: https://kinlane-productions.s3.amazonaws.com/apis-json/apis-json-logo.jpg humanURL: https://langfuse.com/docs/api baseURL: https://cloud.langfuse.com/api/public properties: - url: https://langfuse.com/docs/api type: Documentation - url: openapi/langfuse-openapi.yml type: OpenAPI description: >- Read and query observations (spans, generations, events) attached to traces. Supports filtering by trace, time range, name, and metadata. - aid: langfuse:langfuse-metrics-api name: Langfuse Metrics API tags: - Metrics - Analytics - Reporting image: https://kinlane-productions.s3.amazonaws.com/apis-json/apis-json-logo.jpg humanURL: https://langfuse.com/docs/analytics baseURL: https://cloud.langfuse.com/api/public properties: - url: https://langfuse.com/docs/analytics type: Documentation - url: openapi/langfuse-openapi.yml type: OpenAPI description: >- Aggregated metrics across traces, observations, scores, and costs. Supports custom dimensions, time series, and project-scoped queries for dashboarding. - aid: langfuse:langfuse-prompts-api name: Langfuse Prompt Management API tags: - Prompts - Versioning - Prompt Management image: https://kinlane-productions.s3.amazonaws.com/apis-json/apis-json-logo.jpg humanURL: https://langfuse.com/docs/prompts baseURL: https://cloud.langfuse.com/api/public properties: - url: https://langfuse.com/docs/prompts type: Documentation - url: openapi/langfuse-openapi.yml type: OpenAPI description: >- Create, version, label, and retrieve prompts with client-side caching. Supports text and chat prompt types, configuration variables, and label-based deployment (e.g. production, staging). - aid: langfuse:langfuse-datasets-api name: Langfuse Datasets API tags: - Datasets - Test Data - Evaluations image: https://kinlane-productions.s3.amazonaws.com/apis-json/apis-json-logo.jpg humanURL: https://langfuse.com/docs/datasets baseURL: https://cloud.langfuse.com/api/public properties: - url: https://langfuse.com/docs/datasets type: Documentation - url: openapi/langfuse-openapi.yml type: OpenAPI description: >- Manage datasets and dataset items (input/expected-output pairs) for offline evaluation runs and regression testing. - aid: langfuse:langfuse-evaluations-api name: Langfuse Evaluations API tags: - Evaluations - Scoring - LLM-as-Judge image: https://kinlane-productions.s3.amazonaws.com/apis-json/apis-json-logo.jpg humanURL: https://langfuse.com/docs/evaluation baseURL: https://cloud.langfuse.com/api/public properties: - url: https://langfuse.com/docs/evaluation type: Documentation - url: openapi/langfuse-openapi.yml type: OpenAPI description: >- CRUD operations for evals: define evaluators (LLM-as-judge, code, human), trigger evaluations on traces or dataset runs, and read back scores and reasoning. - aid: langfuse:langfuse-scores-api name: Langfuse Scores API tags: - Scores - Feedback - Quality image: https://kinlane-productions.s3.amazonaws.com/apis-json/apis-json-logo.jpg humanURL: https://langfuse.com/docs/scores baseURL: https://cloud.langfuse.com/api/public properties: - url: https://langfuse.com/docs/scores type: Documentation - url: openapi/langfuse-openapi.yml type: OpenAPI description: >- Attach numeric, categorical, or boolean scores to traces, observations, or sessions. Supports user feedback, model-graded scores, and custom-defined score schemas. - aid: langfuse:langfuse-organizations-api name: Langfuse Organizations & Projects API tags: - Organizations - Projects - Provisioning image: https://kinlane-productions.s3.amazonaws.com/apis-json/apis-json-logo.jpg humanURL: https://langfuse.com/docs/api baseURL: https://cloud.langfuse.com/api/public properties: - url: https://langfuse.com/docs/api type: Documentation - url: openapi/langfuse-openapi.yml type: OpenAPI description: >- Organization-level provisioning APIs to create projects, manage users, and configure project membership programmatically. - aid: langfuse:langfuse-instance-api name: Langfuse Instance Management API tags: - Self-Hosted - Administration - Instance image: https://kinlane-productions.s3.amazonaws.com/apis-json/apis-json-logo.jpg humanURL: https://langfuse.com/self-hosting baseURL: https://cloud.langfuse.com/api/public properties: - url: https://langfuse.com/self-hosting type: Documentation - url: openapi/langfuse-openapi.yml type: OpenAPI description: >- Instance-management endpoints for self-hosted Langfuse deployments. Used to administer organizations, license, and platform-wide configuration. common: - type: Website url: https://langfuse.com/ - type: Documentation url: https://langfuse.com/docs - type: API Reference url: https://api.reference.langfuse.com/ - type: Pricing url: https://langfuse.com/pricing - type: GitHub url: https://github.com/langfuse/langfuse - type: Plans url: plans/langfuse-plans-pricing.yml - type: RateLimits url: rate-limits/langfuse-rate-limits.yml - type: FinOps url: finops/langfuse-finops.yml maintainers: - FN: Kin Lane email: kin@apievangelist.com