# Datamuse Words API (`brunofin/datamuse-words`) Actor

Query the official Datamuse API for rhymes, synonyms, antonyms, and semantically-related words — each returned with a score and syllable count. Fully keyless, no API key required.

- **URL**: https://apify.com/brunofin/datamuse-words.md
- **Developed by:** [Bruno Finger](https://apify.com/brunofin) (community)
- **Categories:** Developer tools
- **Stats:** 1 total users, 0 monthly users, 0.0% runs succeeded, 0 bookmarks
- **User rating**: No ratings yet

## Pricing

Pay per usage

This Actor is paid per platform usage. The Actor is free to use, and you only pay for the Apify platform usage, which gets cheaper the higher subscription plan you have.

Learn more: https://docs.apify.com/actors/running/actors-in-store.md#pay-per-usage

## What's an Apify Actor?

Actors are web data automations that power AI and operations. They run on the Apify platform to scrape websites, process data, connect APIs, and automate workflows.
In Batch mode, an Actor accepts a well-defined JSON input, performs an action which can take anything from a few seconds to a few hours,
and optionally produces a well-defined JSON output, datasets with results, or files in key-value store.
In Standby mode, an Actor provides a web server which can be used as a website, API, or an MCP server.
Actors are written with capital "A".

## How to integrate an Actor?

If asked about integration, you help developers integrate Actors into their projects.
You adapt to their stack and deliver integrations that are safe, well-documented, and production-ready.
The best way to integrate Actors is as follows.

- **AI agents and MCP clients** — the [Apify MCP server](https://docs.apify.com/integrations/mcp.md) at `https://mcp.apify.com` (remote, streamable HTTP, OAuth on first use).
- **Agentic workflows and local Actor development** — [Agent Skills](https://apify.com/.well-known/agent-skills/index.json) with the [Apify CLI](https://docs.apify.com/cli/docs.md): `npm install -g apify-cli`, then `apify login`.
- **JavaScript/TypeScript projects** — the official [JS/TS client](https://docs.apify.com/api/client/js/docs.md): `npm install apify-client`.
- **Python projects** — the official [Python client](https://docs.apify.com/api/client/python/docs.md): `pip install apify-client`.
- **Any other language** — the [REST API](https://docs.apify.com/api/v2.md).

For usage examples, see the [API](#api) section below.

For more details, see Apify documentation as [Markdown index](https://docs.apify.com/llms.txt) and [Markdown full-text](https://docs.apify.com/llms-full.txt).

# README

## Datamuse Words API

Query the official [Datamuse](https://www.datamuse.com/api) API for rhymes, synonyms, antonyms, and semantically-related words for any input word(s). Each result is returned with a match `score` and `numSyllables`. Completely **keyless** and **free** — no API key, token, or paid tier required.

### Input

|| Field | Type | Required | Default | Description |
||---|---|---|---|---|
|| `words` | array\[string] | yes | — | List of input words to look up (e.g. `["hello"]`). |
|| `relationship` | string | no | `rel_rhy` | Word relationship to query: `rel_rhy` (rhymes), `rel_syn` (synonyms), `rel_ant` (antonyms), `rel_bga` (words that often follow), or `rel_trg` (related/triggered by). |
|| `max` | integer | no | 1000 | Maximum results per word (Datamuse caps at 1000). |

Find rhymes for a word:

```json
{"words": ["hello"], "relationship": "rel_rhy"}
```

Find synonyms for several words:

```json
{
  "words": ["hello", "world"],
  "relationship": "rel_syn",
  "max": 100
}
```

### Output

One dataset item per input word containing: `word`, `inputWord`, `relationship`, `count`, `matches[]` (each with `word`, `score`, `numSyllables`), and `sourceUrl`. Empty results are emitted as a record with `count: 0` and no error (a valid no-match response). Each input word is one `$0.001` pay-per-event charge (`word-searched` event).

### Usage

```bash
cd datamuse-words
python3 -m venv .venv
. .venv/bin/activate
pip install -r requirements.txt
echo '{"words": ["hello"], "relationship": "rel_rhy"}' > storage/key_value_stores/default/INPUT.json
python src/main.py
```

### Pricing

PAY\_PER\_EVENT — $0.001 per `word-searched` event (one per input word queried).

### Related actors

- [Free Dictionary API](https://apify.com/brunofin/free-dictionary-api) — word definitions, phonetics, pronunciation audio, and examples
- [OpenAlex Paper Search](https://apify.com/brunofin/openalex-paper-search) — scholarly works, citations, authors, and topics
- [Hacker News Story Stats](https://apify.com/brunofin/hacker-news-story-stats) — Hacker News front page and search stats via the Algolia API

# Actor input Schema

## `words` (type: `array`):

List of input words to look up. Each word is queried independently against the selected relationship.

## `relationship` (type: `string`):

The type of word relationship to query. rel\_rhy = rhymes, rel\_syn = synonyms, rel\_ant = antonyms, rel\_bga = words that often follow, rel\_trg = related/triggers.

## `max` (type: `integer`):

Maximum number of results returned per word (Datamuse caps at 1000).

## Actor input object example

```json
{
  "relationship": "rel_rhy",
  "max": 1000
}
```

# Actor output Schema

## `results` (type: `string`):

No description

# API

You can run this Actor programmatically using our API. Below are code examples in JavaScript, Python, and CLI, as well as the OpenAPI specification and MCP server setup.

## JavaScript example

```javascript
import { ApifyClient } from 'apify-client';

// Initialize the ApifyClient with your Apify API token
// Replace the '<YOUR_API_TOKEN>' with your token
const client = new ApifyClient({
    token: '<YOUR_API_TOKEN>',
});

// Prepare Actor input
const input = {};

// Run the Actor and wait for it to finish
const run = await client.actor("brunofin/datamuse-words").call(input);

// Fetch and print Actor results from the run's dataset (if any)
console.log('Results from dataset');
console.log(`💾 Check your data here: https://console.apify.com/storage/datasets/${run.defaultDatasetId}`);
const { items } = await client.dataset(run.defaultDatasetId).listItems();
items.forEach((item) => {
    console.dir(item);
});

// 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/js/docs

```

## Python example

```python
from apify_client import ApifyClient

# Initialize the ApifyClient with your Apify API token
# Replace '<YOUR_API_TOKEN>' with your token.
client = ApifyClient("<YOUR_API_TOKEN>")

# Prepare the Actor input
run_input = {}

# Run the Actor and wait for it to finish
run = client.actor("brunofin/datamuse-words").call(run_input=run_input)

# Fetch and print Actor results from the run's dataset (if there are any)
print(f"💾 Check your data here: https://console.apify.com/storage/datasets/{run.default_dataset_id}")
for item in client.dataset(run.default_dataset_id).iterate_items():
    print(item)

# 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/python/docs/quick-start

```

## CLI example

```bash
echo '{}' |
apify call brunofin/datamuse-words --silent --output-dataset

```

## MCP server setup

```json
{
    "mcpServers": {
        "apify": {
            "type": "http",
            "url": "https://mcp.apify.com/?tools=fetch-actor-details,brunofin/datamuse-words"
        }
    }
}

```

The hosted server signs you in with OAuth on first connect, so no API token belongs in this config. Clients without OAuth support can send an `Authorization: Bearer <APIFY_API_TOKEN>` header instead, using a token from API & Integrations in Apify Console (https://console.apify.com/settings/integrations).

## OpenAPI specification

Download the OpenAPI definition: https://api.apify.com/v2/actors/A23pI49rQSA0fp8cF/builds/kvJ1Dz9JhLaX7DVwJ/openapi.json