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Crowdin for AI agents

Crowdin manages software localization, letting teams centralize source strings and translations and automate the workflow of getting content fully translated. Connect it once through Arc0, and your agent, or Claude, ChatGPT and Cursor, can use it through one MCP endpoint, limited to what each user approved.

Connect CrowdinSee the 231 actions ↓
Developer toolsOAuth 2.0MCP + RESTcrowdin.com
AUDIT LOG · CROWDINPOLICY: acme-support
09:41:07 · claude · u_8f2read
crowdin.list_mts
List MTs✓ allowed · 212ms
09:41:08 · claude · u_8f2read
crowdin.get_mt
Get MT✓ allowed · 164ms
09:41:09 · claude · u_8f2write
crowdin.create_tms
Add Translation Memory✓ approved · approved by user
09:41:12 · claude · u_8f2destructive
crowdin.delete_tms
Delete Translation Memory✕ blocked · policy: deny
EVERY CROWDIN CALL, ON THE RECORD
01 · USE CASES

What agents do in Crowdin.

01

Add a string to a glossary

Add a term to a project's glossary so translators use consistent terminology.

02

Build a project's translations

Build a project's translation files once new source strings have been translated.

03

Check a translation build's status

Check a translation build's status before pulling the finished files into the app.

02 · ACTIONS

231 Crowdin actions, graded by risk.

Every Crowdin action is tagged read, write or destructive, so one policy covers the whole app and new actions inherit the right default.

read

121

Look things up. Allowed by default.

  • crowdin.get_mt
    Get MT
  • crowdin.get_tms
    Get Translation Memory
  • crowdin.get_file
    Get File
  • crowdin.get_user
    Get Authenticated User
  • crowdin.list_mts
    List MTs
  • crowdin.list_tms
    List Translation Memories
  • crowdin.get_label
    Get Label
  • crowdin.get_branch
    Get Branch
  • crowdin.get_string
    Get String
  • crowdin.get_viewer
    Get Viewer
  • crowdin.list_files
    List Files
  • crowdin.list_tasks
    List Tasks
  • crowdin.get_project
    Get Project
  • crowdin.get_storage
    Get Storage
  • crowdin.get_webhook
    Get Webhook
  • crowdin.list_labels
    List Labels
+ 105 MORE

write

76

Create and change things. Allow, or ask the user first.

  • crowdin.add_file
    Add File
  • crowdin.add_label
    Add Label
  • crowdin.add_branch
    Add Branch
  • crowdin.create_tms
    Add Translation Memory
  • crowdin.update_tms
    Update Translation Memory
  • crowdin.add_project
    Create Crowdin Project
  • crowdin.add_webhook
    Add Webhook
  • crowdin.update_user
    Update Authenticated User
  • crowdin.add_directory
    Add Directory
  • crowdin.create_string
    Create String
  • crowdin.create_glossary
    Create Glossary
  • crowdin.create_language
    Create Custom Language
  • crowdin.update_language
    Update Custom Language
  • crowdin.update_webhooks
    Update Organization Webhook
  • crowdin.create_tm_import
    Create TM Import
  • crowdin.add_glossary_term
    Add Glossary Term
+ 60 MORE

destructive

34

Delete, cancel or archive. Ask first, or deny outright.

  • crowdin.delete_tms
    Delete Translation Memory
  • crowdin.delete_file
    Delete File
  • crowdin.delete_label
    Delete Label
  • crowdin.delete_branch
    Delete Branch
  • crowdin.delete_string
    Delete String
  • crowdin.delete_project
    Delete Project
  • crowdin.delete_storage
    Delete Storage
  • crowdin.delete_webhook
    Delete Webhook
  • crowdin.delete_glossary
    Delete Glossary
  • crowdin.delete_language
    Delete Custom Language
  • crowdin.delete_directory
    Delete Directory
  • crowdin.delete_tm_segment
    Delete TM Segment
  • crowdin.delete_project_task
    Delete Project Task
  • crowdin.delete_tms_segments
    Clear TM Segments
  • crowdin.delete_glossary_term
    Delete Glossary Term
  • crowdin.delete_glossary_terms
    Delete Glossary Terms
+ 18 MORE
03 · HOW IT WORKS

Crowdin in three steps.

  1. 01Your users connect CrowdinThey sign in to Crowdin on Arc0 Connect, under your brand, and approve the access you ask for.
  2. 02You set the rulesReads run, writes like “add Translation Memory” can wait for the user, and “delete Translation Memory” can be denied outright.
  3. 03Any agent can actYour agent calls Crowdin through the Arc0 SDK or MCP, and so can Claude, ChatGPT and Cursor. Every call lands on the audit log.
POLICY.TS
await arc0.policies.set('crowdin', {
  read: 'allow',
  write: 'ask',        // create_tms
  destructive: 'deny',  // delete_tms
})

# Claude Code: the same connection, one URL
$ claude mcp add --transport http arc0 \
    https://mcp.arc0.ai/u/u_8f2
04 · AUTH AND DATA

How Crowdin connects.

Users sign in to Crowdin on Arc0 Connect and approve the scopes you request. Build with Arc0’s Crowdin OAuth app, or bring your own so the Crowdin consent screen names you. Tokens refresh automatically, and you can export them whenever you want.

The same Crowdin connection serves your agent over MCP and your own backend over REST and the proxy, so a user connects once. How Arc0 handles credentials →

AUTH
API key · OAuth 2.0
CREDENTIALS
Per-tenant encrypted vault
MODEL SEES
Results only, never credentials
AUDIT LOG
Every call, on every plan
05 · WORKS WITH

Use Crowdin from any agent.

Claude
ChatGPT
Cursor
Codex
VS Code
OpenAI Agents SDK
Claude Agent SDK
Vercel AI SDK
Mastra
LangGraph
06 · RELATED

More developer tools apps.

GitHub896 actionsSupabase129 actions0CodeKit8 actionsAbly25 actionsAbstract3 actionsAddressfinder17 actionsAddresszen2 actionsAlchemy36 actions
ALL DEVELOPER TOOLS APPS →
07 · FAQ

Crowdin and Arc0, answered.

Q01

Can I use Crowdin with Claude, ChatGPT or Cursor?

Yes. Connect Crowdin to Arc0 once, then add your Arc0 MCP URL to Claude, ChatGPT, Cursor, Claude Code or any other remote-MCP client. Each assistant only gets the Crowdin actions you allow.

Q02

How do users connect Crowdin?

Users sign in to Crowdin on Arc0 Connect and approve the scopes you request. Build with Arc0’s Crowdin OAuth app, or bring your own so the Crowdin consent screen names you. Tokens refresh automatically, and you can export them whenever you want.

Q03

Which Crowdin actions can my agent take?

231 in total: 121 read, 76 write and 34 destructive, such as “add Translation Memory”. Your policies decide which of them each agent may call.

Q04

Can I stop my agent from deleting things in Crowdin?

Yes. Actions like “delete Translation Memory” are graded destructive. Set destructive actions to deny, or to ask so the user approves each one, and blocked calls still show up on the audit log.

Q05

Can my own backend call Crowdin too?

Yes. The same Crowdin connection is available over REST and through the Arc0 proxy, so your product and your agent share one connection per user.

Get started

Plug Crowdin into your agent.

Your users connect Crowdin once, under your brand. Your agent gets 231 actions behind your policies, with every call on the record.

Connect CrowdinBrowse all apps →

Free to build · MCP + REST · Audit log on every plan