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NEXUS Text QA Validator
x402
NEXUS Text QA Validator is a paid API for AI agents from x402.nexusword.it, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-02).
Checks a text string for quality issues such as duplicate spaces and returns a deterministic pass/fail assessment with a list of detected problems
Price / call$0.02
Success—
StatusUnknown
How this service works
x402-paid deterministic utilities for autonomous agents
Output
A JSON object with an 'ok' boolean indicating whether the text passed validation, and an 'issues' array listing specific problems found (e.g. 'duplicate spaces'). If ok is true, issues is empty; if false, issues enumerates each detected problem.
Example use cases
Pre-publish content quality check
“Before I post this blog intro, can you run it through the text quality checker and tell me if there are any issues like duplicate spaces or formatting problems? Here's the text: 'Welcome to our blog. We write about technology and design.'”
Pipeline text validation for data ingestion
“I'm ingesting user-submitted form responses and need you to check this entry for text quality issues before storing it: 'Hello, my name is Alex. I am interested in your services.'”
Automated copyediting assistant
“Can you validate this marketing tagline for any text quality problems — things like double spaces or weird formatting — before we send it to the design team? The text is: 'Built for speed, designed for you.'”
Technical details
Endpoint
POSThttps://x402.nexusword.it/v1/text-qa?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a lightweight, deterministic, low-cost ($0.02 USDC) text validation pass that returns structured issue lists rather than a generative explanation. It is ideal for automated pipelines where consistency and reproducibility matter more than nuanced editorial feedback, and when you want to check for specific formatting defects like duplicate spaces rather than subjective style improvements.
Side effects
- Missing or empty 'text' field returns an error or empty analysis
- Very long text inputs may hit payload limits
- Payment failure (402) if x402 payment header is missing or invalid USDC amount
- Malformed JSON body returns a 4xx error
- Network timeout on the x402 payment negotiation step
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| text | string |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": false,
"issues": [
"duplicate spaces"
]
}
}Tags
x402
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