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Word Frequency for Agents
x402
Word Frequency for Agents is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-21).
Counts and returns the top words by frequency from a given text as structured JSON
Price / call$0.001
Success—
StatusUnknown
How this service works
Top word frequencies. Call when ranking terms for tags, search hints, or simple content signals. Returns top words by frequency as structured JSON. $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
Returns a structured JSON object containing an ordered list of the top words and their respective frequency counts extracted from the provided text, suitable for use in tagging, search hints, or content analysis pipelines.
Example use cases
Auto-tagging blog post content
“Can you pull out the top words by frequency from this blog post so I can use them as tags? Here's the full text: 'Machine learning models are transforming industries. Machine learning in healthcare, finance, and logistics is growing fast...'”
Search hint generation for articles
“I want to generate search hint keywords for this news article — analyze the word frequencies and give me the top terms. Article text: 'The stock market rallied sharply on Monday after the Federal Reserve signaled a pause in rate hikes...'”
Content signal extraction for SEO
“Take this product description and tell me which words appear most frequently so I can understand what terms dominate the copy: 'Our premium wireless headphones deliver crystal-clear audio with deep bass and noise cancellation...'”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/word-frequency?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a deterministic, first-party word frequency count without any LLM interpretation or external dependencies. Ideal for lightweight content signal extraction, tag generation, or search hint ranking where reproducibility and low cost ($0.001 USDC per call) matter. Prefer this over LLM-based keyword extraction when you want raw frequency counts rather than semantic importance scores, and over third-party NLP APIs when you want no API key, no subscription, and no data retention.
Side effects
- Text exceeds 100,000 character limit — returns a structured validation error (no charge)
- Empty or missing text field — returns a structured validation error (no charge)
- Payment not provided or insufficient — returns 402 Payment Required
- Network timeout on large payloads near the character limit
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| text | string | Primary text input (max 100k chars). Processed first-party; not retained as a dataset. |
Output
Schema · Response
{
"type": "json",
"example": {
"top": [
{
"word": "agent",
"count": 1
},
{
"word": "hello",
"count": 1
},
{
"word": "world",
"count": 1
}
],
"schema": "delx/word-frequency/v1",
"unique": 3,
"total_tokens": 3
}
}Tags
x402
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