Lunary

Lunary is an open-source LLM observability and evaluation platform: tracing, prompt management, datasets, evaluations, and analytics for LLM apps. Available as a hosted SaaS at lunary.ai and as a self-hosted Apache 2.0 deployment. Exposes a REST API authenticated with Bearer tokens.

Lunary publishes 14 API contracts indexed on the APIs.io network, including Analytics API, Checklists API, Datasets API, and 11 more. Tagged areas include AI Evaluation, Observability, Open Source, LLM, and Tracing.

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

Lunary’s developer surface includes authentication, engineering blog, and 11 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

28.3/100 thin ▬ flat Agent 23/100 agent aware Front door AI 6/6 dominant Heartbeat 22/100 dormant 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

AI Evaluation Observability Open Source LLM Tracing Prompts

What this lets a business do 1

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

Information & Data Management

BC-610

DatasetsDatasets V2EvalsRunsTemplates

POST /v1/evals POST /v1/evals/{id}/run POST /v1/evals/criteria POST /v1/datasets-v2

Kin Score

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

Composite quality — 28.3/100 · thin

Contract Quality 9.1 / 19

Developer Ergonomics 5.0 / 15

Access Clarity 1.0 / 15

Operational Transparency 0.9 / 10

Contract Governance 1.2 / 9

Discoverability 5.6 / 8

Regulatory Posture 0.8 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 23/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 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/.

Show this score on your site.

It updates itself when the score changes. Paste this where you link to your API docs:

<a href="https://apis.io/providers/lunary/"><img src="https://apis.io/badge/lunary/card.svg" alt="Lunary on APIs.io — Kin Score by API Evangelist"></a>

Other styles, a README pill and a shields.io endpoint are on the badge page.

Raise your score.

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 →
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes Ask about this →
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link 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 →

7 more unmet checks in the Agent Readiness table above.

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

Access Clarity scores 6.4 — up to +18.7 composite points Ask about this →
Developer Ergonomics scores 33.3 — up to +13.3 composite points Ask about this →
Contract Quality scores 48.7 — up to +12.8 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/lunary/apis.yml: open an issue on github.com/api-evangelist/lunary 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 →

Standards implemented 2

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.

Model Context Protocol (MCP)

measured — observed by APIs.io (platform)

OpenAPI

measured — observed by APIs.io (published)

APIs 14

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

Lunary API

REST API for Lunary covering ingestion (logs/traces), prompts (template management with versions and labels), datasets, evaluations, projects, users, and analytics. Authenticati...

Lunary Analytics API

The Analytics API from Lunary — 1 operation(s) for analytics.

Lunary Checklists API

The Checklists API from Lunary — 2 operation(s) for checklists.

Lunary Datasets API

The Datasets API from Lunary — 3 operation(s) for datasets.

Lunary Evals API

The Evals API from Lunary — 7 operation(s) for evals.

Lunary Models API

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

Lunary Playground API

The Playground API from Lunary — 2 operation(s) for playground.

Lunary Runs API

The Runs API from Lunary — 10 operation(s) for runs.

Lunary Templates API

The Templates API from Lunary — 5 operation(s) for templates.

Lunary TestEndpoint API

The TestEndpoint API from Lunary — 2 operation(s) for testendpoint.

Lunary Views API

The Views API from Lunary — 2 operation(s) for views.

Lunary Audit Logs API

The Audit Logs API from Lunary — 1 operation(s) for audit logs.

Lunary Datasets V2 API

The Datasets V2 API from Lunary — 13 operation(s) for datasets v2.

Lunary External Users API

The External Users API from Lunary — 2 operation(s) for external users.

Scroll for all 14

Open Collections 14

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

Lunary Analytics API

OPEN COLLECTION

Lunary Analytics AuditLogs API

OPEN COLLECTION

Lunary Analytics Checklists API

OPEN COLLECTION

Lunary Analytics Datasets API

OPEN COLLECTION

Lunary Analytics DatasetsV2 API

OPEN COLLECTION

Lunary Analytics Evals API

OPEN COLLECTION

Lunary Analytics ExternalUsers API

OPEN COLLECTION

Lunary Analytics Models API

OPEN COLLECTION

Lunary Analytics Playground API

OPEN COLLECTION

Lunary Analytics Runs API

OPEN COLLECTION

Lunary Analytics Templates API

OPEN COLLECTION

Lunary Analytics TestEndpoint API

OPEN COLLECTION

Lunary Analytics Views API

OPEN COLLECTION

Lunary API

OPEN COLLECTION

Scroll for all 14

MCP Servers 1

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

Lunary MCP Server

Remote MCP server at docs.lunary.ai over HTTP; 3 tools listed.

MCP SERVER

Lunary API pricing

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

Plan	Price
Self-Hosted (Apache 2.0) free	Free
Hobby (Hosted Free) free	Free
Team / Pro paid	—
Enterprise enterprise	—

Plan details, limits and sources →

Rate limits

Per API key (hosted): 30 RPS requests per second

Compiled by API Evangelist, not yet checked against Lunary's documentation. Rate-limit details →

Pricing Plans 1

Published pricing tiers and plan structures.

Lunary Plans Pricing

4 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Lunary Rate Limits

1 limits

RATE LIMITS

FinOps 1

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

Lunary 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.

Lunary API Rules

55 rules · 51 error-severity 3 warn-severity 1 info-severity

SPECTRAL

Security Posture 2

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

Lunary Authentication

http · 1 scheme

SECURITY

Lunary Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access (API Evangelist recommendations) 1

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

Lunary Agentic Access

82 operations · 50 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

LlmsText

LlmsText

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 1

Status, limits, changes, and where to get help

RateLimits

RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

Company 3

The organization behind the API

LinkedIn

Website

Website

Blog

Blog

Other 2

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

OpenSource

OpenSource

Source (apis.yml)

aid: lunary
url: https://raw.githubusercontent.com/api-evangelist/lunary/refs/heads/main/apis.yml
name: Lunary
kind: company
description: 'Lunary is an open-source LLM observability and evaluation platform: tracing, prompt management, datasets, evaluations,
  and analytics for LLM apps. Available as a hosted SaaS at lunary.ai and as a self-hosted Apache 2.0 deployment. Exposes
  a REST API authenticated with Bearer tokens.'
deliveryModel:
  model: unknown
  open_source: unknown
  commercial: true
  callable_host: true
  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/lunary.png
x-docs-platform: mintlify
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-03
x-docs-hosting: vercel
tags:
- AI Evaluation
- Observability
- Open Source
- LLM
- Tracing
- Prompts
tags_raw:
- AI Evaluation
- Observability
- Open Source
- LLM
- Tracing
- Prompts
- Open-Source
created: '2026-05-08'
modified: '2026-05-08'
specificationVersion: '0.23'
apis:
- aid: lunary:platform
  name: Lunary API
  description: REST API for Lunary covering ingestion (logs/traces), prompts (template management with versions and labels),
    datasets, evaluations, projects, users, and analytics. Authentication uses Bearer tokens; private API keys for management
    endpoints, public keys for ingestion.
  humanURL: https://docs.lunary.ai/api
  baseURL: https://api.lunary.ai/v1
  tags:
  - Logs
  - Traces
  - Prompts
  - Datasets
  - Evaluation
  tags_raw:
  - Logs
  - Traces
  - Prompts
  - Datasets
  - Evaluations
  properties:
  - type: Documentation
    url: https://docs.lunary.ai/api
  - type: GitHub
    url: https://github.com/lunary-ai/lunary
  - type: SelfHost
    url: https://lunary.ai/docs/self-hosting
- aid: lunary:lunary-analytics-api
  name: Lunary Analytics API
  description: The Analytics API from Lunary — 1 operation(s) for analytics.
  humanURL: https://docs.lunary.ai/api
  baseURL: https://api.lunary.ai/v1
  tags:
  - Analytics
  properties:
  - type: OpenAPI
    url: openapi/lunary-analytics-api-openapi.yml
- aid: lunary:lunary-checklists-api
  name: Lunary Checklists API
  description: The Checklists API from Lunary — 2 operation(s) for checklists.
  humanURL: https://docs.lunary.ai/api
  baseURL: https://api.lunary.ai/v1
  tags:
  - Checklists
  properties:
  - type: OpenAPI
    url: openapi/lunary-checklists-api-openapi.yml
- aid: lunary:lunary-datasets-api
  name: Lunary Datasets API
  description: The Datasets API from Lunary — 3 operation(s) for datasets.
  humanURL: https://docs.lunary.ai/api
  baseURL: https://api.lunary.ai/v1
  tags:
  - Datasets
  properties:
  - type: OpenAPI
    url: openapi/lunary-datasets-api-openapi.yml
- aid: lunary:lunary-evals-api
  name: Lunary Evals API
  description: The Evals API from Lunary — 7 operation(s) for evals.
  humanURL: https://docs.lunary.ai/api
  baseURL: https://api.lunary.ai/v1
  tags:
  - Evals
  properties:
  - type: OpenAPI
    url: openapi/lunary-evals-api-openapi.yml
- aid: lunary:lunary-models-api
  name: Lunary Models API
  description: The Models API from Lunary — 2 operation(s) for models.
  humanURL: https://docs.lunary.ai/api
  baseURL: https://api.lunary.ai/v1
  tags:
  - Models
  properties:
  - type: OpenAPI
    url: openapi/lunary-models-api-openapi.yml
- aid: lunary:lunary-playground-api
  name: Lunary Playground API
  description: The Playground API from Lunary — 2 operation(s) for playground.
  humanURL: https://docs.lunary.ai/api
  baseURL: https://api.lunary.ai/v1
  tags:
  - Playground
  properties:
  - type: OpenAPI
    url: openapi/lunary-playground-api-openapi.yml
- aid: lunary:lunary-runs-api
  name: Lunary Runs API
  description: The Runs API from Lunary — 10 operation(s) for runs.
  humanURL: https://docs.lunary.ai/api
  baseURL: https://api.lunary.ai/v1
  tags:
  - Runs
  properties:
  - type: OpenAPI
    url: openapi/lunary-runs-api-openapi.yml
- aid: lunary:lunary-templates-api
  name: Lunary Templates API
  description: The Templates API from Lunary — 5 operation(s) for templates.
  humanURL: https://docs.lunary.ai/api
  baseURL: https://api.lunary.ai/v1
  tags:
  - Templates
  properties:
  - type: OpenAPI
    url: openapi/lunary-templates-api-openapi.yml
- aid: lunary:lunary-testendpoint-api
  name: Lunary TestEndpoint API
  description: The TestEndpoint API from Lunary — 2 operation(s) for testendpoint.
  humanURL: https://docs.lunary.ai/api
  baseURL: https://api.lunary.ai/v1
  tags:
  - Test Endpoint
  tags_raw:
  - TestEndpoint
  properties:
  - type: OpenAPI
    url: openapi/lunary-testendpoint-api-openapi.yml
- aid: lunary:lunary-views-api
  name: Lunary Views API
  description: The Views API from Lunary — 2 operation(s) for views.
  humanURL: https://docs.lunary.ai/api
  baseURL: https://api.lunary.ai/v1
  tags:
  - Views
  properties:
  - type: OpenAPI
    url: openapi/lunary-views-api-openapi.yml
- aid: lunary:lunary-audit-logs-api
  name: Lunary Audit Logs API
  description: The Audit Logs API from Lunary — 1 operation(s) for audit logs.
  humanURL: https://docs.lunary.ai/api
  baseURL: https://api.lunary.ai/v1
  tags:
  - Audit Logs
  properties:
  - type: OpenAPI
    url: openapi/lunary-audit-logs-api-openapi.yml
- aid: lunary:lunary-datasets-v2-api
  name: Lunary Datasets V2 API
  description: The Datasets V2 API from Lunary — 13 operation(s) for datasets v2.
  humanURL: https://docs.lunary.ai/api
  baseURL: https://api.lunary.ai/v1
  tags:
  - Datasets V2
  properties:
  - type: OpenAPI
    url: openapi/lunary-datasets-v2-api-openapi.yml
- aid: lunary:lunary-external-users-api
  name: Lunary External Users API
  description: The External Users API from Lunary — 2 operation(s) for external users.
  humanURL: https://docs.lunary.ai/api
  baseURL: https://api.lunary.ai/v1
  tags:
  - External Users
  properties:
  - type: OpenAPI
    url: openapi/lunary-external-users-api-openapi.yml
common:
- type: CapabilityMap
  url: capabilities/lunary-capability-edges.yml
  name: Lunary Business Capability Map
- type: AgenticAccess
  url: agentic-access/lunary-agentic-access.yml
- type: DomainSecurity
  url: security/lunary-domain-security.yml
- type: Authentication
  url: authentication/lunary-authentication.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/lunaryai
- type: Website
  url: https://lunary.ai/
- type: DeveloperPortal
  url: https://docs.lunary.ai/
- type: OpenSource
  url: https://github.com/lunary-ai/lunary
- type: Plans
  url: plans/lunary-plans-pricing.yml
- type: RateLimits
  url: rate-limits/lunary-rate-limits.yml
- type: FinOps
  url: finops/lunary-finops.yml
- type: Integrations
  url: https://lunary.ai/integrations
- type: LlmsText
  url: https://docs.lunary.ai/llms.txt
- url: https://lunary.ai/blog
  type: Blog
integrations:
- name: Anthropic
- name: Flowise
- name: LangChain
- name: OpenRouter
- name: IBM WatsonX
- name: Mistral
- name: Grok
- name: Fireworks AI
- name: Ragas
- name: PowerBI
- name: Tableau
- name: MySQL
- name: Gemini
- name: AWS Bedrock
- name: Amplitude
- name: Airbyte
- name: Segment
- name: Email / SMTP
- name: Slack
- name: Zapier
- name: Redshift
- name: PostHog
- name: OpenLLMetry
- name: LlamaIndex
- name: SQL Server
- name: Databricks
- name: Snowflake
- name: LiteLLM
- name: Langflow
- name: Google BigQuery
- name: OpenAI
- name: Azure OpenAI
- name: SOC 2 Type II
- name: ISO 27001
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Lunary API — frequently asked questions

Does Lunary have an API?

Yes. APIs.io lists 14 APIs from Lunary, including Lunary API, Lunary Analytics API and Lunary Checklists API, and 11 more.

Is there an OpenAPI specification for the Lunary API?

Yes. APIs.io indexes 13 OpenAPI specifications for Lunary, each linked for download from this page.

How do I authenticate with the Lunary API?

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

How much does the Lunary API cost?

APIs.io lists 4 pricing plans for Lunary, with each plan's price, limits and inclusions under Pricing on this page.

Does Lunary have an MCP server?

Yes. APIs.io lists 1 MCP server for Lunary: Remote MCP server at docs.lunary.ai over HTTP; 3 tools listed.

Is the Lunary API ready for AI agents?

Lunary has a Kin Score of 28.3 out of 100 (thin) and an Agent Readiness score of 23.4 (agent-aware), scored by API Evangelist on 2026-11-13.

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This provider

curl "https://apis.io/api/v1/providers/lunary"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/lunary/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/lunary/evidence"

Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.