I18n Agent vs Polytranslator
A side-by-side look at the I18n Agent and Polytranslator MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.
Verdict: choose I18n Agent for translation services work as a local process; choose Polytranslator for translation services over a hosted endpoint. You can also run both side by side in one mcpServers block.
Which MCP server should you choose?
Choose I18n Agent when
- You need dedicated capabilities in the Translation Services domain.
- You prefer a local stdio subprocess transport.
- You have the keys it needs:
I18N_AGENT_API_KEY, MCP_SERVER_URL.
Choose Polytranslator when
- You need dedicated capabilities in the Translation Services domain.
- You prefer a remote HTTP/SSE transport.
- You have the keys it needs:
POLYTRANSLATOR_API_KEY.
Feature & specification comparison
Rows where the two servers differ are marked.
| Spec | ||
|---|---|---|
| Category | Translation Services | Translation Services |
| Quality signal | 39/100 · Fair | 40/100 · Fair |
| Install command | Confirmed | Confirmed |
| Transport | Local subprocess (stdio) | Remote HTTP/SSE |
| Auth | Not declared | Not declared |
| Pricing | Not declared | Not declared |
| Required env vars | I18N_AGENT_API_KEYMCP_SERVER_URL | POLYTRANSLATOR_API_KEY |
| Verified owner | Community listing | Community listing |
| GitHub stars | 0 | 0 |
| Directory activity | 2 views 0 installs 0 upvotes | 1 views 0 installs 0 upvotes |
| Tools | Not listed | Not listed |
| Full listing | View I18n Agent | View Polytranslator |
Tools & capabilities
I18n Agent tools
No tool names declared yet. Check the project README from the listing page.
Polytranslator tools
No tool names declared yet. Check the project README from the listing page.
Ready-to-paste client configs
Paste either block (or both) into your client config, e.g. claude_desktop_config.json or ~/.cursor/mcp.json. We only show a config when the install command is confirmed.
I18n Agent
{
"mcpServers": {
"i18n-agent": {
"command": "npx",
"args": [
"-y",
"@i18n-agent/mcp-client"
],
"env": {
"I18N_AGENT_API_KEY": "YOUR_I18N_AGENT_API_KEY_HERE",
"MCP_SERVER_URL": "YOUR_MCP_SERVER_URL_HERE"
}
}
}
}
Polytranslator
{
"mcpServers": {
"polytranslator": {
"url": "https://www.polytranslator.com/api/mcp"
}
}
}