Crowdin

Crowdin is a localization management platform for software, mobile, games, and documentation. It offers a REST API v2 covering projects, files, strings, translations, screenshots, glossaries, MT engines, and webhooks, plus a single GraphQL endpoint. Authentication uses Personal Access Tokens or OAuth 2. Official client libraries are published for JavaScript/TypeScript, Python, PHP, .NET, Java, and Ruby. Crowdin Enterprise customers get a per-tenant domain (e.g. https://{domain}.api.crowdin.com).

Crowdin publishes 7 APIs on the APIs.io network, including Files API, Glossaries API, Projects API, and 4 more. Tagged areas include Localization, Translation, TMS, REST, and GraphQL.

Crowdin’s developer surface includes authentication, documentation, GitHub presence, engineering blog, and 9 more developer resources.

🌐 Visit website 📡 Source on GitHub

36.7/100 thin ▬ flat Agent 29/100 agent aware Full breakdown ↓
scored 2026-08-20 · rubric v0.12.0

AccessFreeSelf serve⚡ Free to try

9 APIs

LocalizationTranslationTMSRESTGraphQLDeveloper ToolsEnterprise

Kin Score

Kin Score How this is scored →
scored 2026-08-20 · rubric v0.12.0

Composite quality — 36.7/100 · thin

Contract Quality 13.8 / 25

Developer Ergonomics 4.8 / 20

Access Clarity 7.4 / 20

Operational Transparency 3.4 / 13

Contract Governance 0.0 / 12

Discoverability 7.4 / 10

Agent readiness — 29/100 · 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

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/crowdin: 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 9

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

GraphQL 1

GraphQL schemas published by this provider.

Rate Limits 1

Documented rate limits and quota policies.

Crowdin Rate Limits

2 limits

RATE LIMITS

FinOps 1

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

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

GitHub

GitHub

Access & Security 4

Authentication, authorization, and security posture

TrustCenter

TrustCenter

VulnerabilityDisclosure

VulnerabilityDisclosure

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

Website

Website

LinkedIn

Blog

Blog

Source (apis.yml)

aid: crowdin
url: https://raw.githubusercontent.com/api-evangelist/crowdin/refs/heads/main/apis.yml
name: Crowdin
kind: company
description: Crowdin is a localization management platform for software, mobile, games, and documentation. It offers a REST
  API v2 covering projects, files, strings, translations, screenshots, glossaries, MT engines, and webhooks, plus a single
  GraphQL endpoint. Authentication uses Personal Access Tokens or OAuth 2. Official client libraries are published for JavaScript/TypeScript,
  Python, PHP, .NET, Java, and Ruby. Crowdin Enterprise customers get a per-tenant domain (e.g. https://{domain}.api.crowdin.com).
accessModel:
  pricing: free
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Free · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/crowdin.png
tags:
- Localization
- Translation
- TMS
- REST
- GraphQL
- Developer Tools
- Enterprise
created: '2026-05-23'
modified: '2026-05-23'
specificationVersion: '0.23'
apis:
- aid: crowdin:api-v2
  name: Crowdin REST API v2
  description: Full-coverage REST API for Crowdin and Crowdin Enterprise. Resources include projects, files, source strings,
    string translations, string comments, screenshots, glossaries, MT engines, TMs, tasks, workflows, reports, distributions,
    webhooks, users, groups, and OAuth applications. Authenticate with a Personal Access Token or OAuth 2 bearer token.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://support.crowdin.com/developer/api/v2/
  baseURL: https://api.crowdin.com/api/v2
  tags:
  - REST
  - Project
  - File
  - Strings
  - Translations
  - Screenshots
  - Glossary
  - Webhook
  tags_raw:
  - REST
  - Projects
  - Files
  - Strings
  - Translations
  - Screenshots
  - Glossaries
  - Webhooks
  properties:
  - type: Documentation
    url: https://support.crowdin.com/developer/api/v2/
  - type: DeveloperPortal
    url: https://support.crowdin.com/developer/
  - type: SDKs
    title: JavaScript/TypeScript
    url: https://github.com/crowdin/crowdin-api-client-js
  - type: SDKs
    title: Python
    url: https://pypi.org/project/crowdin-api-client/
  - type: SDKs
    title: PHP
    url: https://packagist.org/packages/crowdin/crowdin-api-client
  - type: SDKs
    title: .NET
    url: https://www.nuget.org/packages/Crowdin.Api/
  - type: SDKs
    title: Java
    url: https://github.com/crowdin/crowdin-api-client-java
  - type: SDKs
    title: Ruby
    url: https://github.com/crowdin/crowdin-api-client-ruby
- aid: crowdin:graphql
  name: Crowdin GraphQL API
  description: Single-endpoint GraphQL API for Crowdin Enterprise. Authentication via Bearer token using a Personal Access
    Token or OAuth 2 access token.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://support.crowdin.com/developer/graphql-api/
  baseURL: https://api.crowdin.com/api/graphql
  tags:
  - GraphQL
  - Enterprise
  properties:
  - type: Documentation
    url: https://support.crowdin.com/developer/graphql-api/
  - url: graphql/crowdin-graphql.md
    type: GraphQL
- aid: crowdin:crowdin-files-api
  name: Crowdin Files API
  description: The Files API from Crowdin — 2 operation(s) for files.
  humanURL: https://support.crowdin.com/developer/api/v2/
  baseURL: https://api.crowdin.com/api/v2
  tags:
  - File
  tags_raw:
  - Files
  properties:
  - type: OpenAPI
    url: openapi/crowdin-files-api-openapi.yml
- aid: crowdin:crowdin-glossaries-api
  name: Crowdin Glossaries API
  description: The Glossaries API from Crowdin — 2 operation(s) for glossaries.
  humanURL: https://support.crowdin.com/developer/api/v2/
  baseURL: https://api.crowdin.com/api/v2
  tags:
  - Glossary
  tags_raw:
  - Glossaries
  properties:
  - type: OpenAPI
    url: openapi/crowdin-glossaries-api-openapi.yml
- aid: crowdin:crowdin-projects-api
  name: Crowdin Projects API
  description: The Projects API from Crowdin — 2 operation(s) for projects.
  humanURL: https://support.crowdin.com/developer/api/v2/
  baseURL: https://api.crowdin.com/api/v2
  tags:
  - Project
  tags_raw:
  - Projects
  properties:
  - type: OpenAPI
    url: openapi/crowdin-projects-api-openapi.yml
- aid: crowdin:crowdin-screenshots-api
  name: Crowdin Screenshots API
  description: The Screenshots API from Crowdin — 1 operation(s) for screenshots.
  humanURL: https://support.crowdin.com/developer/api/v2/
  baseURL: https://api.crowdin.com/api/v2
  tags:
  - Screenshots
  properties:
  - type: OpenAPI
    url: openapi/crowdin-screenshots-api-openapi.yml
- aid: crowdin:crowdin-sourcestrings-api
  name: Crowdin SourceStrings API
  description: The SourceStrings API from Crowdin — 2 operation(s) for sourcestrings.
  humanURL: https://support.crowdin.com/developer/api/v2/
  baseURL: https://api.crowdin.com/api/v2
  tags:
  - SourceStrings
  properties:
  - type: OpenAPI
    url: openapi/crowdin-sourcestrings-api-openapi.yml
- aid: crowdin:crowdin-stringtranslations-api
  name: Crowdin StringTranslations API
  description: The StringTranslations API from Crowdin — 1 operation(s) for stringtranslations.
  humanURL: https://support.crowdin.com/developer/api/v2/
  baseURL: https://api.crowdin.com/api/v2
  tags:
  - StringTranslations
  properties:
  - type: OpenAPI
    url: openapi/crowdin-stringtranslations-api-openapi.yml
- aid: crowdin:crowdin-webhooks-api
  name: Crowdin Webhooks API
  description: The Webhooks API from Crowdin — 1 operation(s) for webhooks.
  humanURL: https://support.crowdin.com/developer/api/v2/
  baseURL: https://api.crowdin.com/api/v2
  tags:
  - Webhook
  tags_raw:
  - Webhooks
  properties:
  - type: OpenAPI
    url: openapi/crowdin-webhooks-api-openapi.yml
common:
- type: AgenticAccess
  url: agentic-access/crowdin-agentic-access.yml
- type: TrustCenter
  url: security/crowdin-trust-center.yml
- type: VulnerabilityDisclosure
  url: security/crowdin-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/crowdin-domain-security.yml
- type: Authentication
  url: authentication/crowdin-authentication.yml
- type: Website
  url: https://crowdin.com/
- type: Documentation
  url: https://support.crowdin.com/developer/
- type: GitHub
  url: https://github.com/crowdin
- type: LinkedIn
  url: https://www.linkedin.com/company/crowdin
- type: Plans
  url: plans/crowdin-plans-pricing.yml
- type: RateLimits
  url: rate-limits/crowdin-rate-limits.yml
- type: FinOps
  url: finops/crowdin-finops.yml
- type: Blog
  url: https://blog.crowdin.com/feed.xml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com