TypeScript website screenshot

TypeScript

TypeScript is a strongly typed programming language that builds on JavaScript, adding optional static type checking and other features. Developed and maintained by Microsoft, TypeScript compiles to plain JavaScript and is widely used for large-scale web applications, Node.js services, and developer tooling. The TypeScript Compiler API and Language Service API enable programmatic compilation, type checking, code transformation, and IDE integrations.

TypeScript publishes 3 APIs on the APIs.io network. Tagged areas include Compiler, JavaScript, Language Service, Programming Language, and Static Typing.

The TypeScript catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

TypeScript’s developer surface includes documentation, engineering blog, release notes, and 15 more developer resources.

🌐 Visit website 📡 Source on GitHub
39.2/100 thin ▬ flat Agent 8/100 agent aware Full breakdown ↓
scored 2026-08-05 · rubric v0.9.1
AccessFreemium
3 APIs 1 Agent Skills
CompilerJavaScriptLanguage ServiceProgramming LanguageStatic TypingWeb Development

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-05 · rubric v0.9.1
Composite quality — 39.2/100 · thin
Contract Quality 4.4 / 25
Developer Ergonomics 4.3 / 20
Commercial Clarity 7.9 / 20
Operational Transparency 6.8 / 13
Governance 8.3 / 12
Discoverability 7.4 / 10
Agent readiness — 8/100 · agent aware
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 5 / 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/typescript: 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 3

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

TypeScript Compiler API

Programmatic access to the TypeScript compiler. The Compiler API allows developers to parse TypeScript files into ASTs, perform type checking, emit JavaScript, and transform cod...

TypeScript Language Service API

API for editor integration and language tooling. The Language Service API provides completions, diagnostics, quick fixes, rename, go-to-definition, find references, and other ID...

TypeScript Transform API

The TypeScript Transform API enables custom AST transformations during compilation. Transformers can modify, add, or remove nodes in the TypeScript AST before code emission.

Agent Skills 1

Packaged agent skills for driving this provider's APIs from an AI assistant.

ts-maintain-reduce-repro

AGENT SKILL

Pricing Plans 1

Published pricing tiers and plan structures.

Typescript Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Typescript Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Typescript Finops

FINOPS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Typescript Context

15 classes · 13 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

TypeScript API Rules

5 rules · 3 warnings 2 info

SPECTRAL

JSON Schema 2

Standalone JSON Schema definitions for this provider's data models.

TypeScript Compiler Options

19 properties

JSON SCHEMA

TypeScript Diagnostic

7 properties

JSON SCHEMA

JSON Structure 1

JSON Structure definitions describing this provider's data shapes.

Typescript Diagnostic Structure

6 properties

JSON STRUCTURE

Security Posture 1

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

Typescript Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Documentation 3

Reference material describing how the API behaves

Documentation
Documentation
 JSONSchema
JSONSchema
 JSONSchema
JSONSchema

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgentSkills
AgentSkills

Design & Contract 3

Pagination, idempotency, versioning, errors, and events

JSONLD
JSONLD
 Vocabulary
Vocabulary
 JSONStructure
JSONStructure

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization
 npm
npm
 GitHubIssues
GitHubIssues

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Operate 2

Status, limits, changes, and where to get help

Community
Community
 ReleaseNotes
ReleaseNotes

Company 3

The organization behind the API

Website
Website
 Blog
Blog
 Twitter
Twitter

Other 2

Properties that don't map to a standard resource type

Playground
Playground
 Handbook
Handbook

Source (apis.yml)

apis.yml Raw ↑ 
aid: typescript
name: TypeScript
description: TypeScript is a strongly typed programming language that builds on JavaScript, adding optional static type checking
  and other features. Developed and maintained by Microsoft, TypeScript compiles to plain JavaScript and is widely used for
  large-scale web applications, Node.js services, and developer tooling. The TypeScript Compiler API and Language Service
  API enable programmatic compilation, type checking, code transformation, and IDE integrations.
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://www.typescriptlang.org/favicon-32x32.png
url: https://raw.githubusercontent.com/api-evangelist/typescript/refs/heads/main/apis.yml
created: '2024-01-01'
modified: '2026-05-19'
specificationVersion: '0.19'
tags:
- Compiler
- JavaScript
- Language Service
- Programming Language
- Static Typing
- Web Development
type: Index
apis:
- aid: typescript:typescript-compiler-api
  name: TypeScript Compiler API
  description: Programmatic access to the TypeScript compiler. The Compiler API allows developers to parse TypeScript files
    into ASTs, perform type checking, emit JavaScript, and transform code programmatically.
  image: https://www.typescriptlang.org/favicon-32x32.png
  humanURL: https://www.typescriptlang.org/docs/handbook/compiler-options.html
  baseURL: https://www.typescriptlang.org
  tags:
  - Compiler
  - Transpilation
  - Type Checking
  - AST
  - Code Generation
  properties:
  - type: Documentation
    url: https://github.com/microsoft/TypeScript/wiki/Using-the-Compiler-API
  - type: GitHubRepository
    url: https://github.com/microsoft/TypeScript
  - type: npm Package
    url: https://www.npmjs.com/package/typescript
  - type: APIReference
    url: https://www.typescriptlang.org/tsconfig
  - type: Compiler Options
    url: https://www.typescriptlang.org/tsconfig/
- aid: typescript:typescript-language-service-api
  name: TypeScript Language Service API
  description: API for editor integration and language tooling. The Language Service API provides completions, diagnostics,
    quick fixes, rename, go-to-definition, find references, and other IDE features that power editors like VS Code.
  image: https://www.typescriptlang.org/favicon-32x32.png
  humanURL: https://www.typescriptlang.org
  baseURL: https://www.typescriptlang.org
  tags:
  - Autocomplete
  - Diagnostics
  - IDE
  - Language Service
  - Refactoring
  properties:
  - type: Documentation
    url: https://github.com/microsoft/TypeScript/wiki/Using-the-Language-Service-API
  - type: GitHubRepository
    url: https://github.com/microsoft/TypeScript
- aid: typescript:typescript-transform-api
  name: TypeScript Transform API
  description: The TypeScript Transform API enables custom AST transformations during compilation. Transformers can modify,
    add, or remove nodes in the TypeScript AST before code emission.
  image: https://www.typescriptlang.org/favicon-32x32.png
  humanURL: https://www.typescriptlang.org/docs/handbook/2/types-from-types.html
  baseURL: https://www.typescriptlang.org
  tags:
  - AST
  - Code Transformation
  - Compilation
  - Custom Transformers
  properties:
  - type: Documentation
    url: https://github.com/microsoft/TypeScript/wiki/Using-the-Compiler-API#traversing-the-ast-with-a-little-linter
  - type: GitHubRepository
    url: https://github.com/microsoft/TypeScript
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
common:
- type: DomainSecurity
  url: security/typescript-domain-security.yml
- type: Website
  url: https://www.typescriptlang.org
- type: Documentation
  url: https://www.typescriptlang.org/docs/
- type: GitHubOrganization
  url: https://github.com/microsoft/TypeScript
- type: Blog
  url: https://devblogs.microsoft.com/typescript/
- type: Community
  url: https://www.typescriptlang.org/community
- type: npm
  url: https://www.npmjs.com/package/typescript
- type: Playground
  url: https://www.typescriptlang.org/play
- type: Handbook
  url: https://www.typescriptlang.org/docs/handbook/intro.html
- type: ReleaseNotes
  url: https://www.typescriptlang.org/docs/handbook/release-notes/overview.html
- type: GitHubIssues
  url: https://github.com/microsoft/TypeScript/issues
- type: Twitter
  url: https://twitter.com/typescript
- type: JSONLD
  url: json-ld/typescript-context.jsonld
- type: Vocabulary
  url: vocabulary/typescript-vocabulary.yml
- type: JSONSchema
  url: json-schema/typescript-diagnostic-schema.json
- type: JSONSchema
  url: json-schema/typescript-compiler-options-schema.json
- type: JSONStructure
  url: json-structure/typescript-diagnostic-structure.json
- name: Agent Skills
  url: https://github.com/microsoft/TypeScript-Maintainer-Skills
  type: AgentSkills