Klu

Klu (klu.ai) is an LLM app platform for designing, deploying, evaluating, and observing prompt-driven AI applications. The Klu Engine exposes a REST API at https://api.klu.ai/v1 (Bearer API key) where an Action encapsulates a prompt template, model config, context (RAG), and output parsing, and is invoked to generate completions, with data, feedback, sessions, and models managed alongside it. NOTE - product development appears dormant - the official klu SDK last shipped in March 2025 and the founding team's recent open-source work has shifted toward xAI / Grok tooling - see review.yml for the honest status assessment.

Klu publishes 8 APIs on the APIs.io network, including Actions API, Apps API, Context API, and 5 more. Tagged areas include Artificial Intelligence, LLM, LLM App Platform, Prompt Engineering, and Evaluation.

Klu’s developer surface includes authentication, documentation, and 8 more developer resources.

🌐 Visit website 📡 Source on GitHub

38.0/100 thin ▬ flat Agent 20/100 agent aware saas Full breakdown ↓
scored 2026-09-14 · rubric v0.22.0

AccessPaid

1 APIs

Artificial Intelligence LLMLLM App PlatformPrompt Engineering Evaluation Observability

Kin Score

Kin Score How this is scored →
scored 2026-09-14 · rubric v0.22.0

Composite quality — 38.0/100 · thin

Contract Quality 12.2 / 23

Developer Ergonomics 5.4 / 18

Access Clarity 7.1 / 18

Operational Transparency 4.0 / 12

Contract Governance 0.0 / 11

Discoverability 6.2 / 9

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 20/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 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

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.

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 github.com/api-evangelist/klu-ai: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 8

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

Klu Actions API

Run Actions to generate completions.

Klu Apps API

Apps (projects) grouping Actions, context, and experiments.

Klu Context API

Manage Context libraries and documents for retrieval-augmented generation.

Klu Data API

Data points produced by Action generations.

Klu Feedback API

Ratings, corrections, and issues attached to data points.

Klu Models API

LLM providers and models available in the workspace.

Klu Sessions API

Session memory for multi-turn conversations.

Klu Workspaces API

Workspace administration.

Scroll for all 8

Open Collections 10

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

API Collection

OPEN COLLECTION

Klu Actions API

OPEN COLLECTION

Klu Actions Apps API

OPEN COLLECTION

Klu Actions Context API

OPEN COLLECTION

Klu Actions Data API

OPEN COLLECTION

Klu Actions Feedback API

OPEN COLLECTION

Klu Actions Models API

OPEN COLLECTION

Klu Actions Sessions API

OPEN COLLECTION

Klu Actions Workspaces API

OPEN COLLECTION

Klu API

OPEN COLLECTION

Scroll for all 10

Pricing Plans 1

Published pricing tiers and plan structures.

Klu Ai Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Klu Ai Rate Limits

3 limits

RATE LIMITS

FinOps 1

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

Klu Ai Finops

FINOPS

Security Posture 2

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

Klu Ai Authentication

http · 1 scheme

SECURITY

Klu Ai Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Agentic Access 1

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

Klu Ai Agentic Access

14 operations · 7 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

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 2

The organization behind the API

LinkedIn

Website

Website

Source (apis.yml)

aid: klu-ai
url: https://raw.githubusercontent.com/api-evangelist/klu-ai/refs/heads/main/apis.yml
name: Klu
kind: company
description: Klu (klu.ai) is an LLM app platform for designing, deploying, evaluating, and observing prompt-driven AI applications.
  The Klu Engine exposes a REST API at https://api.klu.ai/v1 (Bearer API key) where an Action encapsulates a prompt template,
  model config, context (RAG), and output parsing, and is invoked to generate completions, with data, feedback, sessions,
  and models managed alongside it. NOTE - product development appears dormant - the official klu SDK last shipped in March
  2025 and the founding team's recent open-source work has shifted toward xAI / Grok tooling - see review.yml for the honest
  status assessment.
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/klu-ai.png
tags:
- Artificial Intelligence
- LLM
- LLM App Platform
- Prompt Engineering
- Evaluation
- Observability
tags_raw:
- AI
- LLM
- LLM App Platform
- Prompt Engineering
- Evaluation
- Observability
created: '2026-06-20'
modified: '2026-06-20'
specificationVersion: '0.23'
apis:
- aid: klu-ai:klu-ai-actions-api
  name: Klu Actions API
  description: Run Actions to generate completions.
  humanURL: https://docs.klu.ai/resources/api-actions
  baseURL: https://api.klu.ai/v1
  tags:
  - Actions
  properties:
  - type: OpenAPI
    url: openapi/klu-ai-actions-api-openapi.yml
  - type: Documentation
    url: https://docs.klu.ai/resources/api-actions
  - type: APIReference
    url: https://docs.klu.ai/resources/api-basics
  - type: PostmanCollection
    url: collections/klu-ai.postman_collection.json
  - type: OpenCollection
    url: collections/klu-ai.opencollection.json
  - type: Documentation
    url: https://docs.klu.ai/guides/data
  - type: APIReference
    url: https://docs.klu.ai/resources/api-context
  - type: Documentation
    url: https://docs.klu.ai/resources/api-basics
- aid: klu-ai:klu-ai-apps-api
  name: Klu Apps API
  description: Apps (projects) grouping Actions, context, and experiments.
  humanURL: https://docs.klu.ai/resources/api-actions
  baseURL: https://api.klu.ai/v1
  tags:
  - Application
  tags_raw:
  - Apps
  properties:
  - type: OpenAPI
    url: openapi/klu-ai-apps-api-openapi.yml
  - type: Documentation
    url: https://docs.klu.ai/resources/api-actions
  - type: APIReference
    url: https://docs.klu.ai/resources/api-basics
  - type: PostmanCollection
    url: collections/klu-ai.postman_collection.json
  - type: OpenCollection
    url: collections/klu-ai.opencollection.json
  - type: Documentation
    url: https://docs.klu.ai/guides/data
  - type: APIReference
    url: https://docs.klu.ai/resources/api-context
  - type: Documentation
    url: https://docs.klu.ai/resources/api-basics
- aid: klu-ai:klu-ai-context-api
  name: Klu Context API
  description: Manage Context libraries and documents for retrieval-augmented generation.
  humanURL: https://docs.klu.ai/resources/api-actions
  baseURL: https://api.klu.ai/v1
  tags:
  - Context
  properties:
  - type: OpenAPI
    url: openapi/klu-ai-context-api-openapi.yml
  - type: Documentation
    url: https://docs.klu.ai/resources/api-actions
  - type: APIReference
    url: https://docs.klu.ai/resources/api-basics
  - type: PostmanCollection
    url: collections/klu-ai.postman_collection.json
  - type: OpenCollection
    url: collections/klu-ai.opencollection.json
  - type: Documentation
    url: https://docs.klu.ai/guides/data
  - type: APIReference
    url: https://docs.klu.ai/resources/api-context
  - type: Documentation
    url: https://docs.klu.ai/resources/api-basics
- aid: klu-ai:klu-ai-data-api
  name: Klu Data API
  description: Data points produced by Action generations.
  humanURL: https://docs.klu.ai/resources/api-actions
  baseURL: https://api.klu.ai/v1
  tags:
  - Data
  properties:
  - type: OpenAPI
    url: openapi/klu-ai-data-api-openapi.yml
  - type: Documentation
    url: https://docs.klu.ai/resources/api-actions
  - type: APIReference
    url: https://docs.klu.ai/resources/api-basics
  - type: PostmanCollection
    url: collections/klu-ai.postman_collection.json
  - type: OpenCollection
    url: collections/klu-ai.opencollection.json
  - type: Documentation
    url: https://docs.klu.ai/guides/data
  - type: APIReference
    url: https://docs.klu.ai/resources/api-context
  - type: Documentation
    url: https://docs.klu.ai/resources/api-basics
- aid: klu-ai:klu-ai-feedback-api
  name: Klu Feedback API
  description: Ratings, corrections, and issues attached to data points.
  humanURL: https://docs.klu.ai/resources/api-actions
  baseURL: https://api.klu.ai/v1
  tags:
  - Feedback
  properties:
  - type: OpenAPI
    url: openapi/klu-ai-feedback-api-openapi.yml
  - type: Documentation
    url: https://docs.klu.ai/resources/api-actions
  - type: APIReference
    url: https://docs.klu.ai/resources/api-basics
  - type: PostmanCollection
    url: collections/klu-ai.postman_collection.json
  - type: OpenCollection
    url: collections/klu-ai.opencollection.json
  - type: Documentation
    url: https://docs.klu.ai/guides/data
  - type: APIReference
    url: https://docs.klu.ai/resources/api-context
  - type: Documentation
    url: https://docs.klu.ai/resources/api-basics
- aid: klu-ai:klu-ai-models-api
  name: Klu Models API
  description: LLM providers and models available in the workspace.
  humanURL: https://docs.klu.ai/resources/api-actions
  baseURL: https://api.klu.ai/v1
  tags:
  - Models
  properties:
  - type: OpenAPI
    url: openapi/klu-ai-models-api-openapi.yml
  - type: Documentation
    url: https://docs.klu.ai/resources/api-actions
  - type: APIReference
    url: https://docs.klu.ai/resources/api-basics
  - type: PostmanCollection
    url: collections/klu-ai.postman_collection.json
  - type: OpenCollection
    url: collections/klu-ai.opencollection.json
  - type: Documentation
    url: https://docs.klu.ai/guides/data
  - type: APIReference
    url: https://docs.klu.ai/resources/api-context
  - type: Documentation
    url: https://docs.klu.ai/resources/api-basics
- aid: klu-ai:klu-ai-sessions-api
  name: Klu Sessions API
  description: Session memory for multi-turn conversations.
  humanURL: https://docs.klu.ai/resources/api-actions
  baseURL: https://api.klu.ai/v1
  tags:
  - Sessions
  properties:
  - type: OpenAPI
    url: openapi/klu-ai-sessions-api-openapi.yml
  - type: Documentation
    url: https://docs.klu.ai/resources/api-actions
  - type: APIReference
    url: https://docs.klu.ai/resources/api-basics
  - type: PostmanCollection
    url: collections/klu-ai.postman_collection.json
  - type: OpenCollection
    url: collections/klu-ai.opencollection.json
  - type: Documentation
    url: https://docs.klu.ai/guides/data
  - type: APIReference
    url: https://docs.klu.ai/resources/api-context
  - type: Documentation
    url: https://docs.klu.ai/resources/api-basics
- aid: klu-ai:klu-ai-workspaces-api
  name: Klu Workspaces API
  description: Workspace administration.
  humanURL: https://docs.klu.ai/resources/api-actions
  baseURL: https://api.klu.ai/v1
  tags:
  - Workspaces
  properties:
  - type: OpenAPI
    url: openapi/klu-ai-workspaces-api-openapi.yml
  - type: Documentation
    url: https://docs.klu.ai/resources/api-actions
  - type: APIReference
    url: https://docs.klu.ai/resources/api-basics
  - type: PostmanCollection
    url: collections/klu-ai.postman_collection.json
  - type: OpenCollection
    url: collections/klu-ai.opencollection.json
  - type: Documentation
    url: https://docs.klu.ai/guides/data
  - type: APIReference
    url: https://docs.klu.ai/resources/api-context
  - type: Documentation
    url: https://docs.klu.ai/resources/api-basics
common:
- type: AgenticAccess
  url: agentic-access/klu-ai-agentic-access.yml
- type: DomainSecurity
  url: security/klu-ai-domain-security.yml
- type: Authentication
  url: authentication/klu-ai-authentication.yml
- type: GitHubOrganization
  url: https://github.com/klu-ai
- type: LinkedIn
  url: https://www.linkedin.com/company/klu-ai
- type: Website
  url: https://klu.ai
- type: Documentation
  url: https://docs.klu.ai
- type: Plans
  url: plans/klu-ai-plans-pricing.yml
- type: RateLimits
  url: rate-limits/klu-ai-rate-limits.yml
- type: FinOps
  url: finops/klu-ai-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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