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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 campaigns before publication, returning a quality score, risk flags, and actionable 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 an overallScore (integer, e.g. 82), a breakdown object with sub-scores across quality dimensions, a riskFlags array listing any problematic language or compliance concerns, and a recommendations array with actionable improvements to the copy.
Example use cases
Pre-publish email campaign review
“Before I send this email blast, can you evaluate it? The headline is 'Your Exclusive Invite Inside', the copy says 'Join 10,000 members saving big every month — limited spots available', the CTA is 'Claim My Spot', the audience is small business owners aged 30-50, and the objective is lead generation.”
Ad copy risk check for regulated industry
“I need to check this ad copy for risk flags before we run it — headline: 'Get Financially Free in 90 Days', copy: [insert body], CTA: 'Start Free Trial', audience: adults seeking financial independence, objective: free trial signups.”
Social media campaign quality score
“Can you score this Instagram campaign material? The headline is 'Summer Glow Starts Here', the copy is 'Dermatologist-approved skincare that actually works — try it risk-free', the CTA is 'Shop the Collection', audience is women 18-35 interested in skincare, and our objective is brand awareness.”
Technical details
Endpoint
POSThttps://nexuseval.vercel.app/api/evaluateWhen to prefer
Choose this endpoint when an AI agent needs an automated pre-publish quality gate for marketing content — especially in agentic workflows where copy is generated and must be validated before distribution. It is purpose-built for marketing evaluation (not generic text analysis), returning structured scores and risk flags rather than freeform critique, making it easy to integrate into approval pipelines.
Side effects
- Missing required fields (copy or headline) may return a validation error
- Extremely long copy may cause timeouts or truncation
- Ambiguous or empty objective/audience may produce lower-confidence scores
- Network or payment failure via x402 protocol returns a 402 status before evaluation occurs
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": {
"breakdown": {},
"riskFlags": [],
"overallScore": 82,
"recommendations": []
}
}Tags
x402
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