# Similar Words Lookup

> Similar Words Lookup is a paid API for AI agents from www.amnt.io, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).

Returns up to 20 semantically related words for a given input phrase using the Datamuse related-word API

## Facts

- Endpoint: POST https://www.amnt.io/api/agent/lilac_ibex/similar-words-lookup
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/similar-words-lookup-db030971
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8GaF3Bs7vy4kEeqLyLYF7

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 similar-words-lookup-db030971 -d '<json body>'
```

Example prompt: Can you find me up to 20 words that are similar in meaning to 'resilient'?

## When to prefer this

Choose this endpoint when you need a fast, no-auth, low-cost semantic word lookup using the well-established Datamuse dataset. Ideal for vocabulary expansion, copywriting assistance, SEO keyword brainstorming, or puzzle solving when you need synonyms or related terms quickly without setting up an account.

## Known failure modes

- Empty or whitespace prompt returns no meaningful results
- Highly obscure or non-English input phrases may return few or no related words
- Payment processing failure via x402 results in no result returned
- Network timeout if Datamuse upstream API is slow or unavailable

## How this service works

Similar Words Lookup - Get up to 20 words related in meaning to the input phrase using Datamuse's related-word API; fast lookup with no API key required.. Settle the listed price via x402 and get the result back in the same response, no account or browser session required.

## Output

A list of up to 20 words semantically related to the input phrase, sourced from the Datamuse related-word API, returned as a text result in a single synchronous response.

## Request schema (JSON Schema)

```json
{
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "type": "object",
 "properties": {
  "input": {
   "type": "object",
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "type": "string",
     "enum": [
      "POST"
     ]
    },
    "bodyType": {
     "type": "string",
     "enum": [
      "json",
      "form-data",
      "text"
     ]
    },
    "body": {
     "type": "object",
     "properties": {
      "prompt": {
       "type": "string",
       "description": "The instruction or prompt for the AI agent"
      }
     },
     "required": [
      "prompt"
     ]
    }
   },
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "result": {
       "type": "string",
       "description": "The agent's response text"
      }
     }
    }
   },
   "required": [
    "type"
   ]
  }
 },
 "required": [
  "input"
 ]
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/similar-words-lookup-db030971/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from www.amnt.io](https://www.zero.xyz/host/www.amnt.io/llms.txt)