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HydraTrader NLP Keyword Extraction
x402
HydraTrader NLP Keyword Extraction is a paid API for AI agents from x402.hydratrader.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-02).
Extracts keywords from a given text input using a pay-per-call NLP endpoint via the x402 micropayment protocol
Price / call$0.01
Success—
StatusUnknown
How this service works
Extract keywords: Verb-path alias of POST /v1/cheap-errand ($0.01 USDC). Same handler + payment terms; path defaults task=extract_keywords when body.task omitted. Cheap agent glue for buyer-supplied text. Base via x402. No API key.
Output
Returns the extracted keywords or key phrases from the submitted text, surfacing the most topically significant terms present in the input.
Example use cases
SEO keyword extraction from blog
“Extract the main keywords from this blog post draft so I can optimize it for search: 'Remote work has reshaped corporate culture, with employees demanding flexible schedules, home office stipends, and asynchronous communication tools.'”
Content tagging for document archive
“I need the key terms pulled out of this research abstract so I can tag it in our document library: 'Quantum computing leverages superposition and entanglement to solve optimization problems exponentially faster than classical computers.'”
Keyword analysis for customer feedback
“What are the most important keywords in this customer review? 'The onboarding process was confusing and support took three days to respond, but the product features themselves are excellent once set up.'”
Technical details
Endpoint
POSThttps://x402.hydratrader.ai/v1/keywords?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need lightweight, pay-per-call keyword extraction without setting up an API key or subscription — ideal for agent workflows that process text intermittently and want to pay only for actual usage via USDC micropayments. It is particularly suited for agents already operating in the x402 payment ecosystem.
Side effects
- HTTP 402 returned if payment is not attached or USDC balance is insufficient
- Input text exceeding 8000 characters will be rejected
- Malformed JSON body or missing 'input' field returns a 400 error
- Network timeouts if the underlying NLP model is slow to respond
- Empty or very short input text may yield sparse or no keyword results
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| task | string | |
| input | string | |
| options | object | |
| client_ref | string |
Tags
x402
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