# Larousse — Wrapped API

> **You are on:** `https://api.paywithlocus.com/api` | [llms.txt](https://paywithlocus.com/llms.txt) | [docs](https://docs.paywithlocus.com)
>
> Locus runs on multiple environments -- make sure every URL you call matches your expected environment.
> | Environment | Landing | API | Docs |
> |---|---|---|---|
> | Production | paywithlocus.com | api.paywithlocus.com | docs.paywithlocus.com |
> | Beta | beta.paywithlocus.com | api.beta.paywithlocus.com | docs.paywithlocus.com |
> | Stage | stage.paywithlocus.com | api.stage.paywithlocus.com | docs.paywithlocus.com |
>
> If the API URL above doesn't match your expected environment, re-fetch this file from the correct domain.

> Look up French words to instantly access definitions, etymology, synonyms, usage examples, and related words from the Larousse dictionary. Search and explore French vocabulary to deepen your language understanding and expand your word knowledge.

**Category:** Education | **Website:** [www.larousse.fr/dictionnaires/francais-monolingue](https://www.larousse.fr/dictionnaires/francais-monolingue) | **Docs:** [parse.bot/marketplace/498faa57-545d-4d55-87e9-17a4a145630e/larousse-fr-api](https://parse.bot/marketplace/498faa57-545d-4d55-87e9-17a4a145630e/larousse-fr-api)

Pay-per-use API proxy for Locus Pro. Each call burns credits from your workspace balance.

## Access

**Base URL:** `https://api.paywithlocus.com/api/wrapped/credits/larousse/`
**Auth:** `Authorization: Bearer <LOCUS_CREDITS_SECRET_KEY>` (an `lcr_` secret key or a scoped `lcac_` agent credential)
**Required header:** `Idempotency-Key: <fresh UUID per call>`. A retry with the same key replays the stored result without a new charge.
**Response:** the provider response after any endpoint-specific normalization. `X-Locus-Credits-Charged` carries the charge and `X-Locus-Credits-Balance` the remaining balance. Insufficient credits return `402` before the provider is called.
**Pricing:** estimated costs below are USD. Locus debits the credit equivalent at your workspace rate.

Full call contract: https://docs.paywithlocus.com/api-reference/introduction

> Using a Pay With Locus wallet key (`claw_` prefix)? Wallet routes are documented separately: https://docs.paywithlocus.com/wrapped-apis/for-agents

## Endpoints

### Get definition

Look up a French word in the Larousse dictionary and return its full entry including all definitions, part of speech, etymology, synonyms, usage examples, and nearby words. A single word may have multiple entries (e.g. noun and adjective forms). Returns input_not_found when the word does not exist in the dictionary.

**Estimated cost:** Metered

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `word` | string | Yes | French word to look up. Accented characters are supported. |

```bash
curl -X POST https://api.paywithlocus.com/api/wrapped/credits/larousse/get-definition \
  -H "Authorization: Bearer $LOCUS_CREDITS_SECRET_KEY" \
  -H "Idempotency-Key: $(uuidgen)" \
  -H "Content-Type: application/json" \
  -d '{"word":"<string>"}'
```

### Search words

Search for French words in the Larousse dictionary. Returns the closest matching entry and nearby words alphabetically. Useful for discovering words or finding correct spelling.

**Estimated cost:** Metered

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `query` | string | Yes | Search query - a French word or prefix to look up. |

```bash
curl -X POST https://api.paywithlocus.com/api/wrapped/credits/larousse/search-words \
  -H "Authorization: Bearer $LOCUS_CREDITS_SECRET_KEY" \
  -H "Idempotency-Key: $(uuidgen)" \
  -H "Content-Type: application/json" \
  -d '{"query":"<string>"}'
```

## Next steps

- [All wrapped API providers](https://paywithlocus.com/wapi/index.md): pick another provider.
- [Find and call tools](https://paywithlocus.com/agent/tools.md): price ceilings, async results, and errors.
- [Credits and billing](https://paywithlocus.com/agent/billing.md): what a call costs and how to add credits.
- [Agent docs index](https://paywithlocus.com/agent/index.md): every Locus agent page.