Kotlin website screenshot

Kotlin

Kotlin is a modern, concise, and safe programming language for the JVM, Android, and multiplatform development. It is developed by JetBrains and provides full interoperability with Java. Kotlin's standard library and ecosystem offer rich APIs for building applications across all platforms.

Kotlin publishes 2 APIs on the APIs.io network. Tagged areas include Android, JVM, Kotlin, Multiplatform, and Programming Language.

Kotlin’s developer surface includes documentation, engineering blog, and 6 more developer resources.

🌐 Visit website 📡 Source on GitHub
21.7/100 emerging ▬ flat Agent 3/100 human only Full breakdown ↓
scored 2026-08-05 · rubric v0.9.1
AccessFreemium
2 APIs
AndroidJVMKotlinMultiplatformProgramming Language

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-05 · rubric v0.9.1
Composite quality — 21.7/100 · emerging
Contract Quality 0.0 / 25
Developer Ergonomics 3.0 / 20
Commercial Clarity 7.9 / 20
Operational Transparency 4.8 / 13
Governance 0.0 / 12
Discoverability 5.9 / 10
Agent readiness — 3/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 10
MCP Server 0 / 12
Machine-Readable Auth 0 / 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
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/kotlin: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 2

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

Kotlin Standard Library API

Core Kotlin standard library with collections, I/O, and utility functions.

Kotlin Coroutines API

Library support for Kotlin coroutines with async/await patterns.

Pricing Plans 1

Published pricing tiers and plan structures.

Kotlin Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Kotlin Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Kotlin Finops

FINOPS

Security Posture 1

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

Kotlin Domain Security

TLSv1.3 · DMARC

SECURITY

Resources

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LlmsText
LlmsText

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Community
Community

Company 3

The organization behind the API

LinkedIn
LinkedIn
 Website
Website
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: kotlin
name: Kotlin
description: Kotlin is a modern, concise, and safe programming language for the JVM, Android, and multiplatform development.
  It is developed by JetBrains and provides full interoperability with Java. Kotlin's standard library and ecosystem offer
  rich APIs for building applications across all platforms.
type: Index
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/kotlin.png
tags:
- Android
- JVM
- Kotlin
- Multiplatform
- Programming Language
url: https://raw.githubusercontent.com/api-evangelist/kotlin/refs/heads/main/apis.yml
created: '2024-01-01'
modified: '2026-04-28'
specificationVersion: '0.19'
apis:
- aid: kotlin:stdlib
  name: Kotlin Standard Library API
  description: Core Kotlin standard library with collections, I/O, and utility functions.
  humanURL: https://kotlinlang.org/api/latest/jvm/stdlib/
  tags:
  - Collections
  - Core
  - Stdlib
  properties:
  - type: Documentation
    url: https://kotlinlang.org/api/latest/jvm/stdlib/
  - type: Reference
    url: https://kotlinlang.org/api/latest/jvm/stdlib/alltypes/
- aid: kotlin:coroutines
  name: Kotlin Coroutines API
  description: Library support for Kotlin coroutines with async/await patterns.
  humanURL: https://kotlinlang.org/api/kotlinx.coroutines/
  tags:
  - Async
  - Concurrency
  - Coroutines
  properties:
  - type: Documentation
    url: https://kotlinlang.org/docs/coroutines-overview.html
  - type: Reference
    url: https://kotlinlang.org/api/kotlinx.coroutines/kotlinx-coroutines-core/
common:
- type: DomainSecurity
  url: security/kotlin-domain-security.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/jetbrains
- type: Website
  url: https://kotlinlang.org/
- type: Documentation
  url: https://kotlinlang.org/docs/home.html
- type: Blog
  url: https://blog.jetbrains.com/kotlin/
- type: GitHubOrganization
  url: https://github.com/JetBrains/kotlin
- type: Community
  url: https://kotlinlang.org/community/
- type: LlmsText
  url: https://kotlinlang.org/llms.txt
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com