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 API contracts indexed 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.

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

Klu’s developer surface includes pricing, engineering blog, authentication, documentation, and 9 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

32.4/100 thin ▬ flat Agent 19/100 agent aware Front door AI 6/6 dominant Heartbeat 0/100 dormant saas Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

1 published contract

Artificial Intelligence LLMLLM App PlatformPrompt Engineering Evaluation Observability

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

Actions

POST /actions

Kin Score

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

Composite quality — 32.4/100 · thin

Contract Quality 8.6 / 19

Developer Ergonomics 4.8 / 15

Access Clarity 5.1 / 15

Operational Transparency 1.2 / 10

Contract Governance 1.2 / 9

Discoverability 5.0 / 8

Regulatory Posture 0.8 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 19/100 · 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

Pagination 0 / 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/klu-ai/"><img src="https://apis.io/badge/klu-ai/card.svg" alt="Klu 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):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship Ask about this →
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 →

10 more unmet checks in the Agent Readiness table above.

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

Developer Ergonomics scores 32.1 — up to +13.6 composite points Ask about this →
Contract Quality scores 46.1 — up to +13.5 composite points Ask about this →
Access Clarity scores 34.0 — up to +13.2 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/klu-ai/apis.yml: open an issue on github.com/api-evangelist/klu-ai 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
Raycast Store Extensions (first-party publishers + community-wrapped products)	covered	9.6 (thin)	-	-

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 1

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.

OpenAPI

measured — observed by APIs.io (published)

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 9

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

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 9

Klu API pricing

Prices published by Klu, read 2026-10-07 from klu.ai/pricing.

Plan	Price
Starter (monthly)	$0 Includes: Single workspace, Prompt versioning, Starter evaluation sets, Community support
Team (monthly)	$99 Includes: Collaboration and approvals, Observability dashboards, Unlimited eval runs, Priority support
Enterprise	Custom Includes: Private cloud deployment, SSO and governance, Dedicated success team, Custom integrations
Starter (yearly)	$0 Includes: Single workspace, Prompt versioning, Starter evaluation sets, Community support
Team (yearly)	$990 Includes: Collaboration and approvals, Observability dashboards, Unlimited eval runs, Priority support

Plan details, limits and sources →

Rate limits

Action Runs: see provider documentation requests
Upstream Model Tokens: see upstream provider documentation tokens
Context Ingestion: see provider documentation requests

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

Pricing Plans 1

Published pricing tiers and plan structures.

Klu Plans Pricing

5 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Klu Rate Limits

3 limits

RATE LIMITS

FinOps 1

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

Klu 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.

Klu API Rules

58 rules · 56 error-severity 1 warn-severity 1 info-severity

SPECTRAL

Security Posture 2

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

Klu Authentication

http · 1 scheme

SECURITY

Klu Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Agentic Access (API Evangelist recommendations) 1

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

Klu 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 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 1

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

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: 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/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: '2026-10-06'
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:
  - Workspace
  tags_raw:
  - 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: Pricing
  url: https://klu.ai/pricing
- url: https://klu.ai/blog
  type: Blog
- type: CapabilityMap
  url: capabilities/klu-ai-capability-edges.yml
  name: Klu Business Capability Map
- 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

Klu API — frequently asked questions

Does Klu have an API?

Yes. APIs.io lists 8 APIs from Klu, including Klu Actions API, Klu Apps API and Klu Context API, and 5 more.

Is there an OpenAPI specification for the Klu API?

Yes. APIs.io indexes 8 OpenAPI specifications for Klu, each linked for download from this page.

How do I authenticate with the Klu API?

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

How much does the Klu API cost?

Klu publishes its prices; its Starter (monthly) plan is $0 as of 2026-10-07. APIs.io lists 5 pricing plans for Klu, with each plan's price, limits and inclusions under Pricing on this page.

Is the Klu API ready for AI agents?

Klu has a Kin Score of 32.4 out of 100 (thin) and an Agent Readiness score of 19.0 (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/klu-ai"

All providers

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

Every operation they expose

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

How their score was established

curl "https://apis.io/api/v1/providers/klu-ai/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.