# Delx Unique Words Inventory

> Delx Unique Words Inventory is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-13).

Tokenizes input text and returns each unique word along with its occurrence count, without any external NLP service.

## Facts

- Endpoint: POST https://api.delx.ai/api/v1/x402/unique-words
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/delx-unique-words-inventory-c585f4bd
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_IcrixXY8ROisHmkktBcGY

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 delx-unique-words-inventory-c585f4bd -d '<json body>'
```

Example prompt: Can you give me a full inventory of unique words and how often each one appears in this text: 'The quick brown fox jumps over the lazy dog. The dog barked at the fox.'

## When to prefer this

Choose this endpoint when you need a simple, deterministic word-count inventory from a text blob without depending on external NLP APIs, embeddings, or subscriptions. It is ideal for lightweight keyword extraction from notes, pages, or chat transcripts where you just need token frequencies, not semantic analysis or part-of-speech tagging.

## Known failure modes

- Text exceeds 100,000 character limit — structured validation error returned (not billed)
- Empty or missing text field — structured validation error (not billed)
- Payment not included or malformed x402 header — payment required error before processing

## How this service works

Unique words with counts. Use for lightweight keyword inventory from notes, pages, or chat transcripts. Returns unique tokens and frequencies without external NLP services. $0.001 USDC per successful call via x402 on Base—deterministic first-party JSON, no API key, no subscription, and nothing is billed on structured validation errors.

## Output

A JSON object containing each unique word token found in the input text mapped to its integer occurrence count, produced locally without external NLP services.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "text": {
   "type": "string",
   "maxLength": 100000,
   "description": "Primary text input (max 100k chars). Processed first-party; not retained as a dataset."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "count": 3,
  "words": [
   "agent",
   "hello",
   "world"
  ],
  "schema": "delx/unique-words/v1",
  "total_tokens": 3
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/delx-unique-words-inventory-c585f4bd/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.delx.ai](https://www.zero.xyz/host/api.delx.ai/llms.txt)