canonical: https://jentic.com/apis/synonyms.com/synonyms

# Synonyms API

Access synonyms and antonyms for English words. Free to use for up to 100 queries per day. The API exposes 1 endpoints secured with apiKey authentication.

## For AI agents

Programmatically get synonyms and antonyms for a word. Covers 1 operations with apiKey authentication.

## Scope

Does not handle payments, communications, or crm - use for developer tools only.

## Capabilities

- Get synonyms and antonyms for a word
- Manage developer tools data programmatically
- Integrate Synonyms API into automated workflows
- Query and filter Synonyms API records by parameters
- Monitor Synonyms API operational status and events

## Use cases

### Developer Tools Operations

Use the Synonyms API to perform developer tools operations programmatically. The API provides 1 endpoints covering core functionality including get synonyms and antonyms for a word.

Example prompt: Call GET /syno.php to get synonyms and antonyms for a word

### Data Retrieval and Monitoring

Query Synonyms API resources on a schedule to track changes, generate alerts, or feed downstream dashboards. Agents poll relevant endpoints, compare against previous state, and trigger actions when thresholds are crossed.

Example prompt: Poll the primary Synonyms API endpoint, compare response to last known state, and alert if changed

### AI Agent Integration via Jentic

AI agents discover and call Synonyms API endpoints through Jentic without managing credentials directly. An agent searches for the required operation by intent, receives the matching endpoint schema, and executes the call with Jentic-managed authentication. This eliminates the need to read API documentation or handle apiKey tokens manually.

Example prompt: Search Jentic for 'get synonyms and antonyms for a word', load the operation schema, and execute with Jentic-managed credentials

## Key endpoints

| Method | Path | Description |
| --- | --- | --- |
| GET | `/syno.php` | Get synonyms and antonyms for a word |

## Key resources

- **syno.php** — Operations related to syno.php

## AI readiness

This API is usable in Jentic One now. Its AI-readiness score against Jentic's framework shows where it stands today and where improvements would make it even easier for agents to use.

- **Score:** 47 / 100
- **Maturity:** Foundational
- **Dimensions:**
  - Foundational Compliance: 90 / 100
  - Developer Experience & Jentic Compatibility: 57 / 100
  - AI-Readiness & Agent Experience: 48 / 100
  - Agent Usability: 94 / 100
  - Security: 15 / 100
  - AI Discoverability: 75 / 100
- **View full report:** https://jentic.com/apis/synonyms.com/synonyms/scorecard
- **How the score is calculated:** https://docs.jentic.com/reference/api-readiness-framework/overview/
- **More about the dimensions:** https://docs.jentic.com/reference/api-readiness-framework/specification/#dimensional-model-overview

### Score it yourself

Every API in the directory is allowlisted, so you can re-score it with no key required.

- **Score your own API:** https://jentic.com/scorecard.md
- **Scoring CLI agent skill:** https://github.com/jentic/jentic-api-scorecard/blob/main/skills/jentic-api-scorecard/SKILL.md

```sh
npx @jentic/api-scorecard-cli score <openapi-url>
```

## Why Jentic

- **Setup:** Wiring the Synonyms API by hand means passing both the uid and tokenid as query parameters on every call to the stands4.com services host and shaping the request yourself. Through Jentic you install once, import the Synonyms API from the API Directory, store the credentials once, and your agent calls it.
- **Permission scoping:** The Synonyms API takes the word to look up in the query parameters rather than a resource path, so scope the agent to the operation it needs, which is fetching synonyms and antonyms for a word. You choose that allowed set, so anything you do not add stays out of reach.
- **Credential handling:** Your Synonyms API credentials are stored once, encrypted, by your own Jentic One instance and injected at execution time. They never enter the agent's prompt, logs, or context.
- **Discovery method:** Agents search Jentic by intent such as 'get synonyms and antonyms for a word', and Jentic returns the matching Synonyms operation with its input schema so the agent calls the right endpoint without browsing the reference docs.

## Related APIs

- **Github** — Alternative developer tools API
- **Gitlab** — Alternative developer tools API

## FAQ

### What authentication does the Synonyms API use?

The Synonyms API uses an API key passed in the `uid and tokenid` query. Through Jentic, these credentials are stored encrypted in your Jentic One instance and injected at execution time, so raw secrets never enter the agent context.

### Can I get synonyms and antonyms for a word with the Synonyms API?

Yes. Use the GET /syno.php endpoint. The API returns structured JSON responses that agents can parse and act on directly.

### What are the rate limits for the Synonyms API?

Rate limits are not specified in the OpenAPI spec. Check the vendor documentation for current limits. Through Jentic, rate limiting is handled automatically with retry logic built into the execution layer.

### How do I get synonyms and antonyms for a word through Jentic?

Install the Jentic SDK with pip install jentic, authenticate through Jentic One, the self-hosted execution layer, then search for 'get synonyms and antonyms for a word'. Jentic returns the matching Synonyms API operation with its input schema. Load the schema and execute the call - credentials are injected automatically.

### How many endpoints does the Synonyms API have?

The Synonyms API exposes 1 endpoints covering syno.php operations.

### Can I limit what my agent is allowed to do with the Synonyms API?

Yes. Because Jentic One is self-hosted, you set the rules that decide which operations and credentials your agent may use. The Synonyms API exposes a single operation, GET /syno.php, which takes the word to look up as a query parameter rather than addressing a resource path, so you scope the agent to exactly that operation of fetching synonyms and antonyms for a word. Anything you do not add to the allowed set stays out of reach, and your uid and tokenid credentials are injected at execution time rather than exposed to the agent.