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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, $2.99/call, status unknown (last checked 2026-09-14).
Evaluates marketing assets (ads, emails, landing pages, campaign briefs) before publication and returns a GO/NO-GO launch decision with quality scores and prioritized recommendations.
Price / call$2.99
Success—
StatusUnknown
How this service works
x402-native pre-publish Marketing Quality Gateway for autonomous AI agents.
Output
A JSON object containing a 'launchDecision' (GO or NO-GO), an 'averageScore' (0–100 numeric quality rating), 'blockerCount' (number of critical issues preventing launch), 'warningCount' (number of non-critical issues), a 'results' array with per-asset evaluations, and 'prioritizedRecommendations' listing specific improvements ordered by impact. The 'package' field is set to 'launch_readiness' and 'service' identifies NexusEval.
Example use cases
Email campaign GO/NO-GO before send
“Before we send this promotional email tomorrow, check if it's launch-ready: headline is 'Your Exclusive Summer Deal Is Here', copy is 'Save 30% on all annual plans through July 31st — no code needed', CTA is 'Shop Now', audience is existing free-tier users, objective is converting to paid plans. Do we have any blockers?”
A/B ad copy quality gate
“Evaluate these two Facebook ad variants before we push them live — first one has headline 'Double Your Productivity' with copy 'Try Acme AI free for 14 days and automate your busiest tasks', CTA 'Start Free Trial', audience is remote knowledge workers, objective is app installs. Flag any blockers or warnings on each.”
Landing page section review before launch
“We're launching a new pricing page next Monday — can you run NexusEval on the hero section? Headline: 'Simple Pricing, Serious Results', copy: 'Choose a plan that scales with your team. No hidden fees, cancel anytime.', CTA: 'See Plans', audience is SMB decision-makers, objective is plan comparison and sign-up. What's our score and are we good to go?”
Technical details
Endpoint
POSThttps://nexuseval.vercel.app/api/evaluate/launchWhen to prefer
Choose NexusEval Marketing Preflight when you need an automated, structured GO/NO-GO gate before publishing marketing content — especially in agentic pipelines where a human reviewer is not in the loop. It is purpose-built for evaluating marketing assets in batch (up to 20 items per call) with explicit blocker and warning classification, making it suitable for CI/CD-style marketing workflows rather than open-ended qualitative critique.
Side effects
- Empty or missing 'items' array returns a validation error
- Exceeding 20 items in the array may return a 422 or similar schema violation
- Malformed asset objects missing required fields may produce incomplete per-item scores
- Payment failure or insufficient USDC balance returns a 402 Payment Required before evaluation
- Service unavailability on the Vercel deployment returns a 500 or timeout
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| items | array | Marketing assets, ads, emails, landing-page sections or campaign briefs to evaluate together |
Output
Schema · Response
{
"type": "json",
"example": {
"package": "launch_readiness",
"results": [],
"service": "NexusEval",
"averageScore": 84,
"blockerCount": 0,
"warningCount": 1,
"launchDecision": "GO",
"prioritizedRecommendations": []
}
}Tags
x402
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