# DeepL Languages List

> DeepL Languages List is a paid API for AI agents from DeepL at deepl.mpp.paywithlocus.com, paid per call via MPP, $0.005/call, status unknown (last checked 2026-10-12).

Returns the list of languages supported by DeepL for translation, optionally filtered by source or target language type, including formality support flags.

## Facts

- Endpoint: POST https://deepl.mpp.paywithlocus.com/deepl/languages?utm_source=zero.xyz
- Price: $0.005/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Provider: DeepL
- Docs: https://developers.deepl.com
- Website: https://www.deepl.com
- Tags: translation, languages, glossary, document-translation, data
- Canonical page: https://www.zero.xyz/c/deepl-languages-6c777e3c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Izp35dHEgCglQpc6RyWXP

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability deepl-languages-6c777e3c -d '<json body>'
```

Example prompt: Can you give me the full list of languages DeepL supports as translation targets, including which ones support formality options?

## When to prefer this

Use this endpoint when you need to dynamically discover which languages DeepL supports before constructing a translation request, validate a user-provided language code, populate a language picker UI, or determine whether a specific language supports formality. Prefer this over hardcoding language lists to stay in sync with DeepL's current capabilities.

## Known failure modes

- Invalid 'type' value (not 'source' or 'target') may return an error or default to source languages
- Empty or malformed request body defaults to source language list
- Network or upstream DeepL API errors may result in 5xx responses

## How this service works

List all supported source and target languages with formality support info.

## Output

An array of language objects, each containing the language name (e.g. 'Arabic'), its ISO language code (e.g. 'AR'), and a boolean flag indicating whether that language supports formality settings (formal/informal tone).

## Example request

```json
{
 "type": "target"
}
```

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "type": {
   "type": "string",
   "description": "\"source\" (default) or \"target\""
  }
 },
 "additionalProperties": true
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/deepl-languages-6c777e3c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from deepl.mpp.paywithlocus.com](https://www.zero.xyz/host/deepl.mpp.paywithlocus.com/llms.txt)