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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, $0.01/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$0.01
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 service label, a PASS or FAIL decision, an array of risk flags identifying problematic content, and an array of actionable recommendations for improvement.
Example use cases
Email campaign quality gate
“Can you score this email before we send it? Headline: 'Your Exclusive Invite Inside', copy: 'Join thousands of professionals leveling up their skills with our on-demand courses. Limited spots available.', CTA: 'Claim My Spot', audience: early-career professionals, objective: course enrollment. Tell me if it passes and flag any risks.”
Social ad copy review
“I want to run a Facebook ad but want to check it first — headline is 'Transform Your Morning Routine', copy is 'Clinically tested supplements that boost energy and focus without the crash. Try risk-free today.', CTA is 'Try Risk-Free', audience is health-conscious adults 25-45, objective is product trial signups. Does this pass the quality check?”
Landing page headline validation
“We're about to launch a product landing page — can you preflight the copy? The headline is 'The World's Smartest Budgeting App', the body copy is 'Connect your accounts, set goals, and watch your savings grow automatically.', CTA is 'Start Free Trial', audience is young professionals managing finances, and the objective is free trial conversions.”
Technical details
Endpoint
POSThttps://nexuseval.vercel.app/api/gateWhen to prefer
Choose NexusEval Marketing Preflight when you need a fast, automated, pre-publish quality gate for marketing content — especially in agentic pipelines where AI-generated copy needs to be screened before going live. It is purpose-built for x402-native agent workflows, making it ideal when you want a pay-per-check model with no subscription overhead. Prefer this over general LLM review when you need a structured, machine-readable score and explicit PASS/FAIL decision that can gate downstream publishing actions.
Side effects
- Missing required fields (copy, headline, cta) may result in validation errors or low-quality scores
- Overly short or vague copy may produce generic recommendations with limited actionability
- Payment failure or insufficient USDC balance returns a 402 error before evaluation
- Network timeout on the Vercel-hosted endpoint during high traffic
- Ambiguous or missing objective/audience may reduce scoring accuracy
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"score": 82,
"service": "NexusEval",
"decision": "PASS",
"riskFlags": [],
"recommendations": []
}
}Tags
x402
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