# NexusEval Marketing Preflight

> 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 2026-09-16).

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.

## Facts

- Endpoint: POST https://nexuseval.vercel.app/api/evaluate/launch
- Price: $2.99/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/nexuseval-marketing-preflight-c9f7393f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_fgXuYdDu32Fultzf5549e

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability nexuseval-marketing-preflight-c9f7393f -d '<json body>'
```

Example prompt: Run a preflight quality check on our new product launch email — the headline is 'Unlock 50% Off Today Only', the copy says 'Upgrade your workflow with NexusFlow Pro at half price this week', the CTA is 'Claim My Discount', the audience is SaaS startup founders, and the objective is driving trial sign-ups. Tell me if we get a GO decision and what issues to fix.

## When to prefer this

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.

## Known failure modes

- 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

## 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.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "items": {
   "type": "array",
   "items": {
    "type": "object",
    "properties": {
     "cta": {
      "type": "string",
      "description": "Primary call to action"
     },
     "copy": {
      "type": "string",
      "description": "Marketing copy or campaign material to evaluate"
     },
     "audience": {
      "type": "string",
      "description": "Target audience"
     },
     "headline": {
      "type": "string",
      "description": "Headline, subject line or core message"
     },
     "objective": {
      "type": "string",
      "description": "Primary marketing objective"
     }
    }
   },
   "maxItems": 20,
   "minItems": 1,
   "description": "Marketing assets, ads, emails, landing-page sections or campaign briefs to evaluate together"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "package": "launch_readiness",
  "results": [],
  "service": "NexusEval",
  "averageScore": 84,
  "blockerCount": 0,
  "warningCount": 1,
  "launchDecision": "GO",
  "prioritizedRecommendations": []
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/nexuseval-marketing-preflight-c9f7393f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from nexuseval.vercel.app](https://www.zero.xyz/host/nexuseval.vercel.app/llms.txt)