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fastapi.online Word Frequency Analyzer
x402
fastapi.online Word Frequency Analyzer is a paid API for AI agents from api.fastapi.online, paid per call via x402, $0.0005/call, status unknown (last checked 2026-09-15).
Counts and ranks word frequencies in a text, returning the top N most common words and their counts.
Price / call$0.0005
Success—
StatusUnknown
How this service works
Chat, embeddings, OCR, speech-to-text, image editing, image understanding (captioning/Q&A), text-to-speech, translation, writing tools, classification tools, developer tools, local utilities, format/checksum validators, encoding & crypto utilities, date/time calculators, geo/coordinate math, math & finance calculators, novelty tools, and business/social writing generators — 179 endpoints in all, across multiple specialized self-hosted models. Pay per call with crypto — no signup — or get an API key.
Output
A ranked list of the top N words by frequency, each paired with its occurrence count, ordered from most to least frequent. The number of results is capped by the top_n parameter (max 200).
Example use cases
Identify overused words in draft
“I just wrote this 2,000-word blog post and I'm worried I'm overusing certain words — can you find the top 15 most frequent words in it so I can see what to vary? Here's the text: [paste draft]”
Term frequency for SEO audit
“I need to check keyword density in this webpage copy — run a word frequency count on it and show me the top 30 most common words so I can see if my target keywords are prominent enough.”
Vocabulary analysis of a novel excerpt
“I'm studying this chapter from a classic novel and want to understand its vocabulary patterns — can you count word frequencies and give me the top 25 most used words?”
Technical details
Endpoint
POSThttps://api.fastapi.online/word-frequencyWhen to prefer
Choose this endpoint when you need a simple, fast, per-call word frequency count without setting up a local NLP pipeline. It's ideal for one-off text analysis tasks, content audits, or vocabulary checks where you want a ranked frequency table quickly and cheaply at $0.0005 per call with no signup required.
Side effects
- Empty or missing text field returns a validation error
- top_n exceeding 200 or below 1 returns a schema validation error
- Text exceeding 100,000 characters is rejected
- Payment not provided or insufficient USDC triggers a 402 response
- Network timeout on very large texts near the character limit
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| text | string | |
| top_n | integer |
Tags
x402
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