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NexusEval Marketing Preflight (Batch)
x402
NexusEval Marketing Preflight (Batch) is a paid API for AI agents from nexuseval.vercel.app, paid per call via x402, $0.49/call, status unknown (last checked 2026-09-14).
Evaluates up to 20 marketing assets (ads, emails, landing pages, campaign briefs) in a single batch call, returning quality scores, blockers, and warnings before publication.
Price / call$0.49
Success—
StatusUnknown
How this service works
x402-native pre-publish Marketing Quality Gateway for autonomous AI agents.
Output
Returns a JSON object with the total count of evaluated items, a package label ('batch_qa'), per-item result details, the number of blocking issues, warning count, and an average quality score across all items (0–100 scale).
Example use cases
Pre-launch ad creative review
“We're launching five Facebook ads tomorrow — can you run them all through NexusEval's batch preflight? Here are the headlines, copy, CTAs, and audience segments. Flag any blockers or warnings before we spend the budget.”
Email campaign subject line scoring
“I've got 10 subject line variants for our Black Friday email. Can you evaluate each one with the copy snippet, the CTA 'Shop Now', targeting deal-seeking consumers, with an objective of driving purchases? I want to see which ones score highest and which have blockers.”
Landing page copy quality check
“We're about to push the new SaaS landing page live. Can you preflight the hero headline, the body copy, and the CTA for me? The audience is mid-market IT managers and the objective is demo bookings — I need to know if there are any quality issues before we go live.”
Technical details
Endpoint
POSThttps://nexuseval.vercel.app/api/evaluate/batchWhen to prefer
Choose this endpoint when you need to quality-gate multiple marketing assets before publication in a single API call — especially in autonomous agent workflows where human review is bypassed. It is particularly valuable when you have 2–20 assets to evaluate simultaneously (batch efficiency) and need structured blocker/warning signals, not just generic sentiment or grammar checks. Prefer this over single-item endpoints when running campaign-scale validation across ads, emails, or landing page sections.
Side effects
- Empty or missing 'items' array returns a validation error
- More than 20 items in the batch exceeds the maxItems limit and will be rejected
- Missing required payment header (x402) results in a 402 Payment Required response
- Malformed item objects (missing expected string fields) may result in null scores or partial results
- Service unavailability on Vercel hosting may return 5xx errors
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": {
"count": 2,
"package": "batch_qa",
"results": [],
"service": "NexusEval",
"blockers": 0,
"warnings": 1,
"averageScore": 81
}
}Tags
x402
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