Crowdin API

Name: Crowdin API API
Brand: Crowdin API
Availability: InStock

★ Only Publicly Available OpenAPI DocumentProductivityCollaborationbearer11 EndpointsREST

For Agents

Manage localization projects, build and download translations, and run AI translation prompts on Crowdin. Bearer-token authenticated.

Quickstart

Get started with Crowdin API in minutes using your preferred integration method.

# Add to your MCP client config (Claude Desktop, Cursor, Windsurf)
{
  "jentic": {
    "url": "https://api.jentic.com/mcp",
    "auth": "oauth"
  }
}

# Then ask your agent:
"trigger a Crowdin translation build"

# → Jentic returns the GET /events tool with parameter schema, agent executes.

Capabilities

What an agent can do with Crowdin API API.

Create and update Crowdin localization projects via /projects

List source files attached to a project through /projects/{projectId}/files

Trigger a translation build with POST /projects/{projectId}/translations/builds

Download a finished translation bundle via /translations/builds/{buildId}/download

GET STARTED

Start building with Crowdin API API

Explore with Jentic

View OpenAPI Document

Jentic publishes the only available OpenAPI document for Crowdin API, keeping it validated and agent-ready.

Jentic publishes the only available OpenAPI specification for Crowdin API, keeping it validated and agent-ready. The Crowdin API exposes the core of the Crowdin localization platform — projects, source files, translation builds, AI-powered translation prompts, and team collaboration. Agents typically use it to spin up a new translation project, fetch translated files for a release, queue an AI translation prompt, or download a finished translation build for a CI pipeline. The API uses bearer-token auth that accepts both personal access tokens and OAuth access tokens, so it slots equally well into single-developer scripts and multi-tenant integrations.

Use Cases

Patterns agents use Crowdin API API for, with concrete tasks.

★ Continuous Localization in CI

Wire Crowdin into a CI pipeline so every release branch automatically pushes source strings, builds translations, and pulls the resulting language bundles back into the repo. POST /projects/{projectId}/translations/builds queues the build, and GET /projects/{projectId}/translations/builds/{buildId}/download fetches the zip when it is ready. The whole flow takes a few minutes and removes manual export-and-import steps from release engineering.

Trigger a translation build for project 12345 with branchId 678, poll the build status until finished, then download the resulting zip

AI-Powered Translation Review

Use Crowdin AI prompts to enforce brand tone, fix terminology, or post-edit machine translations. Agents create a prompt definition under /ai/prompts that captures the target voice, then attach it to translation workflows so every new string passes through the prompt before reaching reviewers. This shortens the human review queue and keeps multilingual UI copy consistent.

Create an AI prompt that enforces a friendly conversational tone for French translations and attach it to project 12345

Project Provisioning for New Products

Spin up a new Crowdin project with a single API call when a new product line or microsite needs translation. POST /projects accepts a name, source language, and target languages list, returning a project id you can immediately use to upload source files. Useful for agencies that onboard new clients frequently and want to skip the dashboard click-through.

Create a new Crowdin project named 'Acme Mobile App' with source language en and target languages fr, de, ja and return the project id

AI Agent Localization Assistant

Agents use Crowdin via Jentic to manage translation backlogs without holding Crowdin OAuth tokens directly. The agent searches for the right operation by intent, loads the schema, and executes the call with the project id supplied at runtime. Particularly useful for support agents that need to answer 'is the German translation ready?' or 'kick off translation for this PR'.

Search Jentic for 'check translation build status', load the schema, and report whether build 9876 in project 12345 has completed

Key Endpoints

11 endpoints — jentic publishes the only available openapi specification for crowdin api, keeping it validated and agent-ready.

METHOD

PATH

DESCRIPTION

GET

/projects

List Crowdin projects

POST

/projects

Create a new project

POST

/projects/{projectId}/translations/builds

Trigger a translation build

GET

/projects/{projectId}/translations/builds/{buildId}/download

Download a finished build

GET

/projects/{projectId}/files

List source files in a project

POST

/ai/prompts

Create an AI translation prompt

GET

/projects

List Crowdin projects

POST

/projects

Create a new project

POST

/projects/{projectId}/translations/builds

Trigger a translation build

GET

/projects/{projectId}/translations/builds/{buildId}/download

Download a finished build

GET

/projects/{projectId}/files

List source files in a project

Why though Jentic?

Three things that make agents converge on Jentic-routed access.

Credential isolation

Crowdin bearer tokens are stored encrypted in the Jentic vault. Agents call Crowdin operations through Jentic without ever seeing the raw token, and tokens can be rotated from the Jentic dashboard without touching agent code.

Intent-based discovery

Agents search Jentic by intent — for example 'trigger a Crowdin translation build' — and Jentic returns the matching operation with its parameter schema, so the agent fills in projectId and branchId without reading Crowdin docs.

Time to first call

Direct Crowdin integration: 1-2 days for OAuth, polling, and zip download handling. Through Jentic: under an hour — search, load, execute.

Related APIs

Alternatives and complements available in the Jentic catalogue.

Alternative

Phrase API

Phrase is a competing localization platform with comparable project, file, and translation operations.

Choose Phrase when the customer's strings already live in Phrase or they need its in-context editor — Crowdin and Phrase are not interoperable.

Alternative

Smartling API

Smartling is an enterprise translation management system with a similar build-and-download workflow.

Choose Smartling for enterprise compliance, glossary management, and human translation networks at scale.

Complementary

HubSpot Account Info API

HubSpot multi-language content can be exported to Crowdin for translation and re-imported.

Use HubSpot to fetch source content; pass it to Crowdin for localization, then push translated copy back to HubSpot pages.

FAQs

Specific to using Crowdin API API through Jentic.

Why is there no official OpenAPI spec for Crowdin API?

Crowdin does not publish an OpenAPI specification. Jentic generates and maintains this spec so that AI agents and developers can call Crowdin API via structured tooling. It is validated against the live API and kept up to date. Get started at https://app.jentic.com/sign-up.

What authentication does the Crowdin API use?

The Crowdin API uses bearer-token authentication. You can use either a personal access token generated from your Crowdin account or an OAuth access token issued to a Crowdin app. The token goes in the `Authorization: Bearer <token>` header. Jentic stores the token in the encrypted vault and injects it on every call so agents never see the raw secret.

Can I trigger a translation build with the Crowdin API?

Yes — POST /projects/{projectId}/translations/builds queues a build for a project, optionally scoped to a branch or specific target languages. The response returns a build id you poll via GET /projects/{projectId}/translations/builds, and once status is `finished` you call GET /projects/{projectId}/translations/builds/{buildId}/download to fetch the zip.

What are the rate limits for the Crowdin API?

Crowdin enforces tiered rate limits depending on your plan, typically starting around 20 requests per second for paid plans with bursts allowed. Translation build endpoints are heavier and may be rate-limited more aggressively. The current limit and remaining quota are returned in standard `X-RateLimit-*` response headers — read these on each call to back off cleanly.

How do I download a finished translation through Jentic?

Run `pip install jentic`, search for 'download crowdin translation build', load the GET /projects/{projectId}/translations/builds/{buildId}/download schema, and execute with the project and build ids. Jentic streams the zip back through the SDK so the agent can write it straight to disk or pipe it into a deployment step.

Can I use the Crowdin AI prompts endpoints?

Yes. POST /ai/prompts creates a prompt definition that can be attached to translation workflows for tone enforcement, terminology checks, or post-editing machine translations. GET /ai/prompts lists existing prompts so an agent can reuse a brand-voice prompt across projects rather than recreating it each time.