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 9 API contracts indexed on the APIs.io network, including Files API, Glossaries API, Projects API, and 6 more. Tagged areas include Localization, Translation, TMS, REST, and GraphQL.

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

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

🌐 Visit website 📡 Profile data on GitHub

36.2/100 thin ▬ flat Agent 20/100 agent aware Front door AI 5/6 prominent Heartbeat 95/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreeSelf serve⚡ Free to try

1 published contract

Localization Translation TMS REST GraphQL Developer Tools Enterprise

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 36.2/100 · thin

Contract Quality 9.1 / 19

Developer Ergonomics 7.5 / 15

Access Clarity 2.0 / 15

Operational Transparency 2.1 / 10

Contract Governance 1.2 / 9

Discoverability 5.0 / 8

Regulatory Posture 3.4 / 15

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

Pagination 5 / 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/.

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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
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)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document

9 more unmet checks in the Agent Readiness table above.

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

Access Clarity scores 13.2 — up to +17.4 composite points
Contract Quality scores 48.7 — up to +12.8 composite points
Contract Governance scores 13.6 — up to +10.4 composite points

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.

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/crowdin/apis.yml: open an issue on github.com/api-evangelist/crowdin 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
Localization and Translation Management	core	51.2	-	-
IDE Extension Marketplaces (JetBrains, VS Code, Open VSX, Docker Verified Publishers, PyPI orgs)	core	51.2	-	-
Atlassian Marketplace (builders on Jira, Confluence, Bitbucket)	core	51.2	-	-
Drupal Contributed-Module Ecosystem	core	51.2	-	-
Adobe Exchange (publishers of Creative Cloud, Experience Cloud and Document Cloud integrations)	core	51.2	-	-

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 3

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.

GraphQL

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

REST

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

OpenAPI

measured — observed by APIs.io (published)

APIs 9

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

Crowdin REST API v2

Full-coverage REST API for Crowdin and Crowdin Enterprise. Resources include projects, files, source strings, string translations, string comments, screenshots, glossaries, MT e...

Crowdin GraphQL API

Single-endpoint GraphQL API for Crowdin Enterprise. Authentication via Bearer token using a Personal Access Token or OAuth 2 access token.

Crowdin Files API

The Files API from Crowdin — 2 operation(s) for files.

Crowdin Glossaries API

The Glossaries API from Crowdin — 2 operation(s) for glossaries.

Crowdin Projects API

The Projects API from Crowdin — 2 operation(s) for projects.

Crowdin Screenshots API

The Screenshots API from Crowdin — 1 operation(s) for screenshots.

Crowdin SourceStrings API

The SourceStrings API from Crowdin — 2 operation(s) for sourcestrings.

Crowdin StringTranslations API

The StringTranslations API from Crowdin — 1 operation(s) for stringtranslations.

Crowdin Webhooks API

The Webhooks API from Crowdin — 1 operation(s) for webhooks.

Scroll for all 9

Open Collections 8

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

Crowdin REST API v2 Files API

OPEN COLLECTION

Crowdin REST API v2 Files Glossaries API

OPEN COLLECTION

Crowdin REST API v2 Files Projects API

OPEN COLLECTION

Crowdin REST API v2 Files Screenshots API

OPEN COLLECTION

Crowdin REST API v2 Files SourceStrings API

OPEN COLLECTION

Crowdin REST API v2 Files StringTranslations API

OPEN COLLECTION

Crowdin REST API v2 Files Webhooks API

OPEN COLLECTION

Crowdin REST API v2

OPEN COLLECTION

Scroll for all 8

GraphQL 1

GraphQL schemas published by this provider.

Crowdin GraphQL API

Single-endpoint GraphQL API for Crowdin Enterprise. Authentication via Bearer token using a Personal Access Token or OAuth 2 access token.

GRAPHQL

Crowdin API pricing

Not yet checked against Crowdin's own pricing page. Compiled by API Evangelist on 2026-05-22; confirm before you rely on a figure. A free plan or tier is listed.

Plan	Price
Free freemium	Free

Plan details, limits and sources →

Rate limits

Free Tier Default: 10 requests per minute
Pro Tier Default: 120 requests per minute

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

Pricing Plans 1

Published pricing tiers and plan structures.

Crowdin Plans Pricing

1 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Crowdin Rate Limits

2 limits

RATE LIMITS

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

Crowdin

SLA

FinOps 1

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

Crowdin Finops

FINOPS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Crowdin API Rules

52 rules · 49 errors 1 warnings 2 info

SPECTRAL

Security Posture 4

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

Crowdin Authentication

http · 1 scheme

SECURITY

Crowdin Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Crowdin Vulnerability Disclosure

security.txt · contact published

SECURITY

Crowdin Trust Center

ISO 27001, HIPAA, GDPR

SECURITY

Agentic Access 1

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

Crowdin Agentic Access

23 operations · 12 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

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).
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: free
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Free · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-06'
  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
  - Translation
  - 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

Crowdin API — frequently asked questions

Does Crowdin have an API?

Yes. APIs.io lists 9 APIs from Crowdin, including Crowdin REST API v2, Crowdin GraphQL API and Crowdin Files API, and 6 more.

Is there an OpenAPI specification for the Crowdin API?

Yes. APIs.io indexes 7 OpenAPI specifications for Crowdin, each linked for download from this page.

How do I authenticate with the Crowdin API?

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

How much does the Crowdin API cost?

APIs.io lists 1 pricing plan for Crowdin, with each plan's price, limits and inclusions under Pricing on this page.

Is the Crowdin API ready for AI agents?

Crowdin has a Kin Score of 36.2 out of 100 (thin) and an Agent Readiness score of 19.6 (agent-aware), scored by API Evangelist on 2026-11-06.

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