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NexusEval Marketing Preflight
x402
NexusEval Marketing Preflight is a paid API for AI agents from nexuseval.vercel.app, paid per call via x402, $0.04/call, status unknown (last checked 2026-09-14).
Evaluates marketing copy, headlines, and CTAs before publication, returning a quality score, pass/fail decision, risk flags, and improvement recommendations.
Price / call$0.04
Success—
StatusUnknown
How this service works
x402-native pre-publish Marketing Quality Gateway for autonomous AI agents.
Output
Returns a JSON object with a numeric quality score (0-100), a pass/fail decision string, an array of risk flags identifying problematic content or compliance concerns, and an array of actionable recommendations to improve the marketing material before publication.
Example use cases
Email campaign quality check
“Before I send this email blast, check the quality of my campaign — headline: 'Double Your Sales This Quarter', copy: 'Our software integrates with your existing tools and cuts manual work by 50%. No setup fees, cancel anytime.', CTA: 'Get Started Today', audience: 'mid-market SaaS buyers', objective: 'trial sign-ups'. Give me a score and flag any risks.”
Social ad copy preflight
“I want to run a Facebook ad targeting fitness enthusiasts aged 25-40 — headline: 'Finally, a Workout Plan That Sticks', copy: 'Join 50,000 people who transformed their fitness with personalized plans from real coaches.', CTA: 'Join Now', objective: brand awareness. Can you evaluate it and tell me if it passes or needs changes?”
Product launch headline review
“We're launching a new B2B analytics tool next week and I need a quality check on our messaging — headline: 'See Your Pipeline Clearly', copy: 'Real-time dashboards that give your sales team the insights they need to close faster. No data science degree required.', CTA: 'Book a Demo', audience: 'VP of Sales at 50-500 person companies', objective: demo bookings. What's the score and what should we improve?”
Technical details
Endpoint
POSThttps://nexuseval.vercel.app/api/evaluate/adWhen to prefer
Choose this endpoint when an AI agent needs an automated pre-publish quality gate for marketing content — especially in autonomous campaign pipelines where human review is not guaranteed. Ideal for catching risk flags, compliance issues, and quality gaps before ads or emails go live. Best suited for structured marketing assets with identifiable headlines, CTAs, audience targets, and objectives, rather than general text quality or grammar checking.
Side effects
- Missing required fields (copy or headline) may result in validation errors or low-confidence scores
- Vague or empty objective/audience fields reduce scoring accuracy
- Overly long copy inputs may be truncated or cause timeout
- Service unavailability returns a non-200 HTTP status with no score
- Ambiguous CTA language may produce generic rather than specific recommendations
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| cta | string | Primary call to action |
| copy | string | Marketing copy or campaign material to evaluate |
| audience | string | Target audience |
| headline | string | Headline, subject line or core message |
| objective | string | Primary marketing objective |
Output
Schema · Response
{
"type": "json",
"example": {
"score": 82,
"decision": "PASS",
"riskFlags": [],
"recommendations": []
}
}Tags
x402
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