> ## Documentation Index
> Fetch the complete documentation index at: https://docs.rime.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# check_dictionary

> Check which words are not in Rime's pronunciation dictionary via the MCP server.

Check which words are **not** in Rime's pronunciation dictionary. Returns the list of out-of-dictionary words; an empty list means all words are covered. Out-of-dictionary words still synthesize, but you may want to add [custom pronunciations](/docs/custom-pronunciation) for them.

**API key:** Required — see [Authentication](/mcp-reference/authentication).

## Parameters

| Parameter | Type   | Required | Description                                             |
| --------- | ------ | -------- | ------------------------------------------------------- |
| `text`    | string | Yes      | Words to check; separate by spaces, commas, or newlines |

## Example

Ask your assistant:

```
Which words in this IVR script aren't in Rime's dictionary?
```

The assistant runs the script through `check_dictionary` and flags anything out-of-dictionary. Pair it with [`normalize_text`](/mcp-reference/normalize-text) to preview how the rest of the script will be spoken — or use the [`check_script_pronunciation`](/mcp-reference/prompts) starter prompt, which does both.

## Related

* [Pronunciation control](/platform/pronunciation-control) — all the ways to control pronunciation
* [Coverage API](/api-reference/other/oov) — the underlying REST endpoint