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Northline Content Quality Audit
x402
Northline Content Quality Audit is a paid API for AI agents from 206-81-14-131.sslip.io, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-01).
Analyzes text content for readability, structure, word count, and writing quality, returning grade-level scores and actionable improvement suggestions.
Price / call$0.01
Success—
StatusUnknown
How this service works
Pay-per-call APIs, paid downloads and work-on-request for agents. Payment: x402 (USDC on Base, eip155:8453), no accounts or API keys. Catalog: https://206-81-14-131.sslip.io/?format=json. Agent guide: https://206-81-14-131.sslip.io/llms.txt
Output
A JSON object containing word count, sentence count, structural breakdown (headings, paragraphs), readability metrics (Flesch Reading Ease score and grade level), and an array of plain-English suggestions for improving the content.
Example use cases
Landing page copy readability check
“Audit the readability of this landing page intro: 'Streamline your operations with our AI-powered platform. Reduce overhead, boost productivity, and scale effortlessly.' — tell me the Flesch reading ease score, the grade level, and what I should fix.”
Blog post grade-level assessment
“Check the writing quality of this blog excerpt and tell me if it's appropriate for a general audience: 'Photosynthesis converts light energy into chemical energy stored in glucose. Chlorophyll molecules absorb photons, initiating a cascade of electron transfers.' Give me the readability grade and any suggestions.”
Email copy improvement suggestions
“Audit this marketing email draft for readability and structure: 'Our new product launches next week. It solves the pain points you've been struggling with for years. Sign up today for early access.' What's the reading ease score and what should I improve?”
Technical details
Endpoint
GEThttps://206-81-14-131.sslip.io/svc/content-quality-audit/audit?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a fast, cheap ($0.01), no-account readability and structure audit for a piece of text — especially when you want Flesch Reading Ease, grade-level scoring, and actionable writing suggestions in a single call. Prefer it over generic LLM prompting when you want deterministic, reproducible scores rather than subjective AI feedback, and over heavyweight SEO platforms when you only need per-snippet analysis without a subscription.
Side effects
- Empty or missing text input returns an error or zero-value metrics
- Extremely short text (1-2 words) may produce unreliable or degenerate readability scores
- Payment failure via x402 results in 402 response before analysis runs
- Non-English text may yield inaccurate Flesch/grade-level scores since formulas are calibrated for English
Output
Schema · Response
{
"type": "json",
"example": {
"words": 14,
"sentences": 2,
"structure": {
"headings": 1,
"paragraphs": 1
},
"readability": {
"grade": 7.1,
"fleschReadingEase": 68.4
},
"suggestions": [
"Add a clear call to action or next step."
]
}
}Tags
x402
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Zero review prompt (fires after every successful call)
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