Langfuse

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.

Langfuse publishes 35 API contracts indexed on the APIs.io network, including BlobStorageIntegrations API, Comments API, DatasetItems API, and 32 more. Tagged areas include Artificial Intelligence, LLM, Observability, Open Source, and Evaluation.

The Langfuse catalog on APIs.io includes 1 Spectral governance ruleset.

Langfuse’s developer surface includes engineering blog, authentication, documentation, API reference, pricing, GitHub presence, and 12 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

36.5/100 thin ▬ flat Agent 36/100 agent ready Front door AI 6/6 dominant Heartbeat 100/100 alive Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

1 published contract 1 MCP Servers

Artificial Intelligence LLM Observability Open Source Evaluation

What this lets a business do 4

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Information & Data Management

BC-610

EvaluationRulesEvaluatorsPrompts

POST /api/public/v2/evaluation-rules POST /api/public/v2/prompts

SaaS Platform Operations Management

BC-4220

Open Telemetry

POST /api/public/otel/v1/traces

SaaS Tenant Management

BC-4230

SCIM

GET /api/public/scim/Users POST /api/public/scim/Users

AI Model Services

AE-110

Datasets

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 36.5/100 · thin

Contract Quality 9.3 / 19

Developer Ergonomics 3.6 / 15

Access Clarity 3.8 / 15

Operational Transparency 2.1 / 10

Contract Governance 1.2 / 9

Discoverability 5.6 / 8

Regulatory Posture 3.1 / 15

Create-or-Update Ergonomics 2.2 / 10

Agent readiness — 36/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented) Ask about this →
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document Ask about this →
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented) Ask about this →
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks Ask about this →
Documented Reversibility +6 pts — a reversal operation in the contract, graded up when a window is documented too Ask about this →

6 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Developer Ergonomics scores 23.8 — up to +15.2 composite points Ask about this →
Access Clarity scores 25.5 — up to +14.9 composite points Ask about this →
Contract Quality scores 49.4 — up to +12.7 composite points Ask about this →

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

Not sure how this applies to your stack? Ask about any one item. Kin Lane reads every question, looks at your profile and your situation, and replies with what a fix would take — scoped to that one area, priced up front, yours whether you ship it or not. Ask a question →

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/langfuse/apis.yml: open an issue on github.com/api-evangelist/langfuse to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Artifact Hub Cloud-Native Packages	builds-on	37.7	-	-
Hugging Face Hub Organisations	builds-on	37.7	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 3

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

SCIM 2.0

declared — publishes a spec that declares them

5 core of 24 operations graded · api-commons/identity

Model Context Protocol (MCP)

measured — observed by APIs.io (verified)

OpenAPI

measured — observed by APIs.io (published)

APIs 35

Individual APIs this provider publishes, each with its own machine-readable definition.

Langfuse BlobStorageIntegrations API

The BlobStorageIntegrations API from Langfuse — 2 operation(s) for blobstorageintegrations.

Langfuse Comments API

The Comments API from Langfuse — 2 operation(s) for comments.

Langfuse DatasetItems API

The DatasetItems API from Langfuse — 2 operation(s) for datasetitems.

Langfuse DatasetRunItems API

The DatasetRunItems API from Langfuse — 1 operation(s) for datasetrunitems.

Langfuse Datasets API

The Datasets API from Langfuse — 4 operation(s) for datasets.

Langfuse Health API

The Health API from Langfuse — 1 operation(s) for health.

Langfuse Ingestion API

The Ingestion API from Langfuse — 1 operation(s) for ingestion.

Langfuse LegacyMetricsV1 API

The LegacyMetricsV1 API from Langfuse — 1 operation(s) for legacymetricsv1.

Langfuse LegacyObservationsV1 API

The LegacyObservationsV1 API from Langfuse — 2 operation(s) for legacyobservationsv1.

Langfuse LegacyScoreV1 API

The LegacyScoreV1 API from Langfuse — 2 operation(s) for legacyscorev1.

Langfuse LlmConnections API

The LlmConnections API from Langfuse — 2 operation(s) for llmconnections.

Langfuse Media API

The Media API from Langfuse — 2 operation(s) for media.

Langfuse Metrics API

The Metrics API from Langfuse — 1 operation(s) for metrics.

Langfuse Models API

The Models API from Langfuse — 2 operation(s) for models.

Langfuse Observations API

The Observations API from Langfuse — 1 operation(s) for observations.

Langfuse Organizations API

The Organizations API from Langfuse — 4 operation(s) for organizations.

Langfuse Projects API

The Projects API from Langfuse — 4 operation(s) for projects.

Langfuse Prompts API

The Prompts API from Langfuse — 2 operation(s) for prompts.

Langfuse PromptVersion API

The PromptVersion API from Langfuse — 1 operation(s) for promptversion.

Langfuse Scim API

The Scim API from Langfuse — 5 operation(s) for scim.

Langfuse ScoreConfigs API

The ScoreConfigs API from Langfuse — 2 operation(s) for scoreconfigs.

Langfuse Scores API

The Scores API from Langfuse — 2 operation(s) for scores.

Langfuse Sessions API

The Sessions API from Langfuse — 2 operation(s) for sessions.

Langfuse Trace API

The Trace API from Langfuse — 2 operation(s) for trace.

Langfuse UnstableEvaluationRules API

The UnstableEvaluationRules API from Langfuse — 2 operation(s) for unstableevaluationrules.

Langfuse UnstableEvaluators API

The UnstableEvaluators API from Langfuse — 2 operation(s) for unstableevaluators.

Langfuse Evaluation Rules API

The EvaluationRules API from Langfuse — 2 operation(s) for evaluationrules.

Langfuse Evaluators API

The Evaluators API from Langfuse — 3 operation(s) for evaluators.

Langfuse Experiments API

The Experiments API from Langfuse — 2 operation(s) for experiments.

Langfuse Feedback API

The Feedback API from Langfuse — 1 operation(s) for feedback.

Langfuse Unstable Dashboards API

The UnstableDashboards API from Langfuse — 4 operation(s) for unstabledashboards.

Langfuse Unstable Dashboard Widgets API

The UnstableDashboardWidgets API from Langfuse — 2 operation(s) for unstabledashboardwidgets.

Langfuse Unstable Skills API

The UnstableSkills API from Langfuse — 4 operation(s) for unstableskills.

Langfuse Annotation Queues API

The Annotation Queues API from Langfuse — 5 operation(s) for annotation queues.

Langfuse Open Telemetry API

The Open Telemetry API from Langfuse — 1 operation(s) for open telemetry.

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Open Collections 29

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

langfuse AnnotationQueues API

OPEN COLLECTION

langfuse AnnotationQueues BlobStorageIntegrations API

OPEN COLLECTION

langfuse AnnotationQueues Comments API

OPEN COLLECTION

langfuse AnnotationQueues DatasetItems API

OPEN COLLECTION

langfuse AnnotationQueues DatasetRunItems API

OPEN COLLECTION

langfuse AnnotationQueues Datasets API

OPEN COLLECTION

langfuse AnnotationQueues Health API

OPEN COLLECTION

langfuse AnnotationQueues Ingestion API

OPEN COLLECTION

langfuse AnnotationQueues LegacyMetricsV1 API

OPEN COLLECTION

langfuse AnnotationQueues LegacyObservationsV1 API

OPEN COLLECTION

langfuse AnnotationQueues LegacyScoreV1 API

OPEN COLLECTION

langfuse AnnotationQueues LlmConnections API

OPEN COLLECTION

langfuse AnnotationQueues Media API

OPEN COLLECTION

langfuse AnnotationQueues Metrics API

OPEN COLLECTION

langfuse AnnotationQueues Models API

OPEN COLLECTION

langfuse AnnotationQueues Observations API

OPEN COLLECTION

langfuse AnnotationQueues Opentelemetry API

OPEN COLLECTION

langfuse AnnotationQueues Organizations API

OPEN COLLECTION

langfuse AnnotationQueues Projects API

OPEN COLLECTION

langfuse AnnotationQueues Prompts API

OPEN COLLECTION

langfuse AnnotationQueues PromptVersion API

OPEN COLLECTION

langfuse AnnotationQueues Scim API

OPEN COLLECTION

langfuse AnnotationQueues ScoreConfigs API

OPEN COLLECTION

langfuse AnnotationQueues Scores API

OPEN COLLECTION

langfuse AnnotationQueues Sessions API

OPEN COLLECTION

langfuse AnnotationQueues Trace API

OPEN COLLECTION

langfuse AnnotationQueues UnstableEvaluationRules API

OPEN COLLECTION

langfuse AnnotationQueues UnstableEvaluators API

OPEN COLLECTION

langfuse

OPEN COLLECTION

Scroll for all 29

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

Langfuse MCP Server

Remote MCP server at langfuse.com over HTTP; 4 tools listed.

MCP SERVER

Langfuse API pricing

Not yet checked against Langfuse's own pricing page. Compiled by API Evangelist on 2026-05-08 from langfuse.com/pricing; confirm before you rely on a figure. A free plan or tier is listed.

Plan	Price
Self-Hosted (Open Source) free	Free
Hobby (Cloud) free	Free
Core (Cloud) paid	$29 per subscription · Free
Pro (Cloud) paid	$199 per subscription · Free
Enterprise (Cloud) enterprise	$2499 per subscription · Free

Plan details, limits and sources →

Rate limits

Hobby Cloud Monthly Units: 50000 unit
Core/Pro/Enterprise Monthly Units (Included): 100000 unit
Enterprise Custom Rate Limits: contract varies

Compiled by API Evangelist, not yet checked against Langfuse's documentation. All 4 limits →

Pricing Plans 1

Published pricing tiers and plan structures.

Langfuse Plans Pricing

5 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Langfuse Rate Limits

4 limits

RATE LIMITS

Compliance 1

Attestations the provider states (SOC 2, ISO 27001 and others), quoted from its own trust page. APIs.io verifies none of them.

Langfuse

4 quoted statements, read from Langfuse's own page on 2026-11-09.

COMPLIANCE

FinOps 1

Cost, billing, and metering signals for API financial operations.

Langfuse Finops

FINOPS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs. Counts are the severity each rule declares, not results of running them.

Langfuse API Rules

52 rules · 39 error-severity 12 warn-severity 1 info-severity

SPECTRAL

Security Posture 4

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Langfuse Authentication

http · 1 scheme

SECURITY

Langfuse Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Langfuse Vulnerability Disclosure

no policy recorded

SECURITY

Langfuse Trust Center

SOC 2, ISO 27001, HIPAA, GDPR

SECURITY

Agentic Access (API Evangelist recommendations) 1

Recommended x-agentic-access execution contracts for AI agents.

Langfuse Agentic Access

130 operations · 66 acting

AGENTIC

Resources

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

LlmsText

LlmsText

Build 1

SDKs, sample code, and the tooling you integrate with

GitHub

GitHub

Access & Security 4

Authentication, authorization, and security posture

TrustCenter

TrustCenter

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 1

Status, limits, changes, and where to get help

RateLimits

RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

Plans

Plans

FinOps

FinOps

Company 3

The organization behind the API

Blog

Blog

LinkedIn

Website

Website

Other 2

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Attestations

Attestations

Source (apis.yml)

aid: langfuse
url: https://raw.githubusercontent.com/api-evangelist/langfuse/refs/heads/main/apis.yml
name: Langfuse
kind: 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.
deliveryModel:
  model: unknown
  license_evidence:
    repo: langfuse/langfuse
    spdx: NOASSERTION
    stars: 35037
  open_source: unknown
  commercial: true
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - openapi
  - pricing
  - repository-unlicensed
  generated: '2026-09-25'
  method: derived
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-13'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/langfuse.png
x-docs-platform: scalar
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-03
tags:
- Artificial Intelligence
- LLM
- Observability
- Open Source
- Evaluation
tags_raw:
- AI
- LLM
- Observability
- Open Source
- Evaluations
- Open-Source
created: '2026-05-08'
modified: '2026-10-06'
specificationVersion: '0.23'
apis:
- aid: langfuse:langfuse-blobstorageintegrations-api
  name: Langfuse BlobStorageIntegrations API
  description: The BlobStorageIntegrations API from Langfuse — 2 operation(s) for blobstorageintegrations.
  humanURL: https://langfuse.com/docs/tracing
  baseURL: https://cloud.langfuse.com/api/public
  tags:
  - BlobStorageIntegrations
  properties:
  - type: OpenAPI
    url: openapi/langfuse-blobstorageintegrations-api-openapi.yml
  - type: Documentation
    url: https://langfuse.com/docs/tracing
  - type: APIReference
    url: https://api.reference.langfuse.com/
  - type: Documentation
    url: https://langfuse.com/docs/api
  - type: Documentation
    url: https://langfuse.com/docs/analytics
  - type: Documentation
    url: https://langfuse.com/docs/prompts
  - type: Documentation
    url: https://langfuse.com/docs/datasets
  - type: Documentation
    url: https://langfuse.com/docs/evaluation
  - type: Documentation
    url: https://langfuse.com/docs/scores
  - type: Documentation
    url: https://langfuse.com/self-hosting
- aid: langfuse:langfuse-comments-api
  name: Langfuse Comments API
  description: The Comments API from Langfuse — 2 operation(s) for comments.
  humanURL: https://langfuse.com/docs/tracing
  baseURL: https://cloud.langfuse.com/api/public
  tags:
  - Comments
  properties:
  - type: OpenAPI
    url: openapi/langfuse-comments-api-openapi.yml
  - type: Documentation
    url: https://langfuse.com/docs/tracing
  - type: APIReference
    url: https://api.reference.langfuse.com/
  - type: Documentation
    url: https://langfuse.com/docs/api
  - type: Documentation
    url: https://langfuse.com/docs/analytics
  - type: Documentation
    url: https://langfuse.com/docs/prompts
  - type: Documentation
    url: https://langfuse.com/docs/datasets
  - type: Documentation
    url: https://langfuse.com/docs/evaluation
  - type: Documentation
    url: https://langfuse.com/docs/scores
  - type: Documentation
    url: https://langfuse.com/self-hosting
- aid: langfuse:langfuse-datasetitems-api
  name: Langfuse DatasetItems API
  description: The DatasetItems API from Langfuse — 2 operation(s) for datasetitems.
  humanURL: https://langfuse.com/docs/tracing
  baseURL: https://cloud.langfuse.com/api/public
  tags:
  - Dataset Items
  tags_raw:
  - DatasetItems
  properties:
  - type: OpenAPI
    url: openapi/langfuse-datasetitems-api-openapi.yml
  - type: Documentation
    url: https://langfuse.com/docs/tracing
  - type: APIReference
    url: https://api.reference.langfuse.com/
  - type: Documentation
    url: https://langfuse.com/docs/api
  - type: Documentation
    url: https://langfuse.com/docs/analytics
  - type: Documentation
    url: https://langfuse.com/docs/prompts
  - type: Documentation
    url: https://langfuse.com/docs/datasets
  - type: Documentation
    url: https://langfuse.com/docs/evaluation
  - type: Documentation
    url: https://langfuse.com/docs/scores
  - type: Documentation
    url: https://langfuse.com/self-hosting
- aid: langfuse:langfuse-datasetrunitems-api
  name: Langfuse DatasetRunItems API
  description: The DatasetRunItems API from Langfuse — 1 operation(s) for datasetrunitems.
  humanURL: https://langfuse.com/docs/tracing
  baseURL: https://cloud.langfuse.com/api/public
  tags:
  - DatasetRunItems
  properties:
  - type: OpenAPI
    url: openapi/langfuse-datasetrunitems-api-openapi.yml
  - type: Documentation
    url: https://langfuse.com/docs/tracing
  - type: APIReference
    url: https://api.reference.langfuse.com/
  - type: Documentation
    url: https://langfuse.com/docs/api
  - type: Documentation
    url: https://langfuse.com/docs/analytics
  - type: Documentation
    url: https://langfuse.com/docs/prompts
  - type: Documentation
    url: https://langfuse.com/docs/datasets
  - type: Documentation
    url: https://langfuse.com/docs/evaluation
  - type: Documentation
    url: https://langfuse.com/docs/scores
  - type: Documentation
    url: https://langfuse.com/self-hosting
- aid: langfuse:langfuse-datasets-api
  name: Langfuse Datasets API
  description: The Datasets API from Langfuse — 4 operation(s) for datasets.
  humanURL: https://langfuse.com/docs/tracing
  baseURL: https://cloud.langfuse.com/api/public
  tags:
  - Datasets
  properties:
  - type: OpenAPI
    url: openapi/langfuse-datasets-api-openapi.yml
  - type: Documentation
    url: https://langfuse.com/docs/tracing
  - type: APIReference
    url: https://api.reference.langfuse.com/
  - type: Documentation
    url: https://langfuse.com/docs/api
  - type: Documentation
    url: https://langfuse.com/docs/analytics
  - type: Documentation
    url: https://langfuse.com/docs/prompts
  - type: Documentation
    url: https://langfuse.com/docs/datasets
  - type: Documentation
    url: https://langfuse.com/docs/evaluation
  - type: Documentation
    url: https://langfuse.com/docs/scores
  - type: Documentation
    url: https://langfuse.com/self-hosting
- aid: langfuse:langfuse-health-api
  name: Langfuse Health API
  description: The Health API from Langfuse — 1 operation(s) for health.
  humanURL: https://langfuse.com/docs/tracing
  baseURL: https://cloud.langfuse.com/api/public
  tags:
  - Health
  properties:
  - type: OpenAPI
    url: openapi/langfuse-health-api-openapi.yml
  - type: Documentation
    url: https://langfuse.com/docs/tracing
  - type: APIReference
    url: https://api.reference.langfuse.com/
  - type: Documentation
    url: https://langfuse.com/docs/api
  - type: Documentation
    url: https://langfuse.com/docs/analytics
  - type: Documentation
    url: https://langfuse.com/docs/prompts
  - type: Documentation
    url: https://langfuse.com/docs/datasets
  - type: Documentation
    url: https://langfuse.com/docs/evaluation
  - type: Documentation
    url: https://langfuse.com/docs/scores
  - type: Documentation
    url: https://langfuse.com/self-hosting
- aid: langfuse:langfuse-ingestion-api
  name: Langfuse Ingestion API
  description: The Ingestion API from Langfuse — 1 operation(s) for ingestion.
  humanURL: https://langfuse.com/docs/tracing
  baseURL: https://cloud.langfuse.com/api/public
  tags:
  - Ingestion
  properties:
  - type: OpenAPI
    url: openapi/langfuse-ingestion-api-openapi.yml
  - type: Documentation
    url: https://langfuse.com/docs/tracing
  - type: APIReference
    url: https://api.reference.langfuse.com/
  - type: Documentation
    url: https://langfuse.com/docs/api
  - type: Documentation
    url: https://langfuse.com/docs/analytics
  - type: Documentation
    url: https://langfuse.com/docs/prompts
  - type: Documentation
    url: https://langfuse.com/docs/datasets
  - type: Documentation
    url: https://langfuse.com/docs/evaluation
  - type: Documentation
    url: https://langfuse.com/docs/scores
  - type: Documentation
    url: https://langfuse.com/self-hosting
- aid: langfuse:langfuse-legacymetricsv1-api
  name: Langfuse LegacyMetricsV1 API
  description: The LegacyMetricsV1 API from Langfuse — 1 operation(s) for legacymetricsv1.
  humanURL: https://langfuse.com/docs/tracing
  baseURL: https://cloud.langfuse.com/api/public
  tags:
  - LegacyMetricsV1
  properties:
  - type: OpenAPI
    url: openapi/langfuse-legacymetricsv1-api-openapi.yml
  - type: Documentation
    url: https://langfuse.com/docs/tracing
  - type: APIReference
    url: https://api.reference.langfuse.com/
  - type: Documentation
    url: https://langfuse.com/docs/api
  - type: Documentation
    url: https://langfuse.com/docs/analytics
  - type: Documentation
    url: https://langfuse.com/docs/prompts
  - type: Documentation
    url: https://langfuse.com/docs/datasets
  - type: Documentation
    url: https://langfuse.com/docs/evaluation
  - type: Documentation
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- aid: langfuse:langfuse-legacyobservationsv1-api
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- aid: langfuse:langfuse-legacyscorev1-api
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  baseURL: https://cloud.langfuse.com/api/public
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- aid: langfuse:langfuse-llmconnections-api
  name: Langfuse LlmConnections API
  description: The LlmConnections API from Langfuse — 2 operation(s) for llmconnections.
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  baseURL: https://cloud.langfuse.com/api/public
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- aid: langfuse:langfuse-media-api
  name: Langfuse Media API
  description: The Media API from Langfuse — 2 operation(s) for media.
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- aid: langfuse:langfuse-metrics-api
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  description: The Metrics API from Langfuse — 1 operation(s) for metrics.
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  baseURL: https://cloud.langfuse.com/api/public
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- aid: langfuse:langfuse-models-api
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  baseURL: https://cloud.langfuse.com/api/public
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- aid: langfuse:langfuse-observations-api
  name: Langfuse Observations API
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  baseURL: https://cloud.langfuse.com/api/public
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- aid: langfuse:langfuse-organizations-api
  name: Langfuse Organizations API
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  baseURL: https://cloud.langfuse.com/api/public
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- aid: langfuse:langfuse-projects-api
  name: Langfuse Projects API
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  baseURL: https://cloud.langfuse.com/api/public
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- aid: langfuse:langfuse-prompts-api
  name: Langfuse Prompts API
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  baseURL: https://cloud.langfuse.com/api/public
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- aid: langfuse:langfuse-promptversion-api
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  baseURL: https://cloud.langfuse.com/api/public
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- aid: langfuse:langfuse-scim-api
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  baseURL: https://cloud.langfuse.com/api/public
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- aid: langfuse:langfuse-scoreconfigs-api
  name: Langfuse ScoreConfigs API
  description: The ScoreConfigs API from Langfuse — 2 operation(s) for scoreconfigs.
  humanURL: https://langfuse.com/docs/tracing
  baseURL: https://cloud.langfuse.com/api/public
  tags:
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- aid: langfuse:langfuse-scores-api
  name: Langfuse Scores API
  description: The Scores API from Langfuse — 2 operation(s) for scores.
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  baseURL: https://cloud.langfuse.com/api/public
  tags:
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- aid: langfuse:langfuse-sessions-api
  name: Langfuse Sessions API
  description: The Sessions API from Langfuse — 2 operation(s) for sessions.
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  baseURL: https://cloud.langfuse.com/api/public
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- aid: langfuse:langfuse-trace-api
  name: Langfuse Trace API
  description: The Trace API from Langfuse — 2 operation(s) for trace.
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  baseURL: https://cloud.langfuse.com/api/public
  tags:
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    url: https://langfuse.com/self-hosting
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  name: Langfuse UnstableEvaluationRules API
  description: The UnstableEvaluationRules API from Langfuse — 2 operation(s) for unstableevaluationrules.
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  baseURL: https://cloud.langfuse.com/api/public
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    url: https://langfuse.com/docs/evaluation
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    url: https://langfuse.com/docs/scores
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- aid: langfuse:langfuse-unstableevaluators-api
  name: Langfuse UnstableEvaluators API
  description: The UnstableEvaluators API from Langfuse — 2 operation(s) for unstableevaluators.
  humanURL: https://langfuse.com/docs/tracing
  baseURL: https://cloud.langfuse.com/api/public
  tags:
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- aid: langfuse:langfuse-evaluationrules-api
  name: Langfuse Evaluation Rules API
  description: The EvaluationRules API from Langfuse — 2 operation(s) for evaluationrules.
  humanURL: https://langfuse.com/docs/tracing
  baseURL: https://cloud.langfuse.com/api/public
  tags:
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- aid: langfuse:langfuse-evaluators-api
  name: Langfuse Evaluators API
  description: The Evaluators API from Langfuse — 3 operation(s) for evaluators.
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  baseURL: https://cloud.langfuse.com/api/public
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- aid: langfuse:langfuse-experiments-api
  name: Langfuse Experiments API
  description: The Experiments API from Langfuse — 2 operation(s) for experiments.
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  baseURL: https://cloud.langfuse.com/api/public
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- aid: langfuse:langfuse-feedback-api
  name: Langfuse Feedback API
  description: The Feedback API from Langfuse — 1 operation(s) for feedback.
  humanURL: https://langfuse.com/docs/tracing
  baseURL: https://cloud.langfuse.com/api/public
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    url: https://langfuse.com/self-hosting
- aid: langfuse:langfuse-unstabledashboards-api
  name: Langfuse Unstable Dashboards API
  description: The UnstableDashboards API from Langfuse — 4 operation(s) for unstabledashboards.
  humanURL: https://langfuse.com/docs/tracing
  baseURL: https://cloud.langfuse.com/api/public
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    url: https://api.reference.langfuse.com/
  - type: Documentation
    url: https://langfuse.com/docs/api
  - type: Documentation
    url: https://langfuse.com/docs/analytics
  - type: Documentation
    url: https://langfuse.com/docs/prompts
  - type: Documentation
    url: https://langfuse.com/docs/datasets
  - type: Documentation
    url: https://langfuse.com/docs/evaluation
  - type: Documentation
    url: https://langfuse.com/docs/scores
  - type: Documentation
    url: https://langfuse.com/self-hosting
- aid: langfuse:langfuse-unstabledashboardwidgets-api
  name: Langfuse Unstable Dashboard Widgets API
  description: The UnstableDashboardWidgets API from Langfuse — 2 operation(s) for unstabledashboardwidgets.
  humanURL: https://langfuse.com/docs/tracing
  baseURL: https://cloud.langfuse.com/api/public
  tags:
  - UnstableDashboardWidgets
  properties:
  - type: OpenAPI
    url: openapi/langfuse-unstabledashboardwidgets-api-openapi.yml
  - type: Documentation
    url: https://langfuse.com/docs/tracing
  - type: APIReference
    url: https://api.reference.langfuse.com/
  - type: Documentation
    url: https://langfuse.com/docs/api
  - type: Documentation
    url: https://langfuse.com/docs/analytics
  - type: Documentation
    url: https://langfuse.com/docs/prompts
  - type: Documentation
    url: https://langfuse.com/docs/datasets
  - type: Documentation
    url: https://langfuse.com/docs/evaluation
  - type: Documentation
    url: https://langfuse.com/docs/scores


# --- truncated at 32 KB (36 KB total) ---
# Full source: https://artifacts.apis.io/langfuse/apis.yml

Langfuse API — frequently asked questions

Does Langfuse have an API?

Yes. APIs.io lists 35 APIs from Langfuse, including Langfuse BlobStorageIntegrations API, Langfuse Comments API and Langfuse DatasetItems API, and 32 more.

Is there an OpenAPI specification for the Langfuse API?

Yes. APIs.io indexes 35 OpenAPI specifications for Langfuse, each linked for download from this page.

How do I authenticate with the Langfuse API?

Langfuse uses bearer-token authentication (http · 1 scheme). The details are profiled on APIs.io as Langfuse Authentication.

How much does the Langfuse API cost?

APIs.io lists 5 pricing plans for Langfuse, with each plan's price, limits and inclusions under Pricing on this page.

Does Langfuse have an MCP server?

Yes. APIs.io lists 1 MCP server for Langfuse: Remote MCP server at langfuse.com over HTTP; 4 tools listed.

Is the Langfuse API ready for AI agents?

Langfuse has a Kin Score of 36.5 out of 100 (thin) and an Agent Readiness score of 36.2 (agent-ready), scored by API Evangelist on 2026-11-13.

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