# NexusEval Marketing Preflight

> NexusEval Marketing Preflight is a paid API for AI agents from nexuseval.vercel.app, paid per call via x402, $9.99/call, status unknown (last checked 2026-09-14).

Evaluates up to 50 marketing campaign assets (ads, emails, landing pages, GTM materials) for quality and readiness before publication, returning GO/NO-GO decisions with risk patterns and prioritized actions.

## Facts

- Endpoint: POST https://nexuseval.vercel.app/api/evaluate/campaign
- Price: $9.99/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/nexuseval-marketing-preflight-f6683b8b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_m3GS5GOIt-DQnsnEmfhTm

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-f6683b8b -d '<json body>'
```

Example prompt: Run a preflight quality check on these 3 campaign assets before we push them live — the headline is 'Double Your Revenue This Quarter', the copy is 'Our AI-powered platform cuts costs by 40%', the CTA is 'Start Free Trial', the audience is B2B SaaS decision-makers, and the objective is lead generation.

## When to prefer this

Choose this endpoint when you need an automated, pre-publication quality gate for marketing assets — especially in agentic workflows where a human reviewer is not in the loop. It is ideal for batch evaluation of up to 50 assets at once with a single clear GO/NO-GO signal, making it suited for campaign automation pipelines. Prefer this over generic LLM prompting when you need structured, consistent, scored output with risk patterns and prioritized actions that downstream agents can act on.

## Known failure modes

- Empty or missing 'items' array returns a validation error
- Submitting more than 50 items exceeds the maxItems limit and may be rejected
- Malformed asset objects (missing required fields) may result in incomplete scoring
- Payment failure via x402 protocol returns 402 status and no evaluation result
- Network timeout for large batches of 50 complex assets

## How this service works

x402-native pre-publish Marketing Quality Gateway for autonomous AI agents.

## Output

Returns a JSON object with the package type, asset count, an average quality score (0-100), a list of weakest assets with details, an overall GO/NO-GO decision string, top risk patterns found across the portfolio, and a prioritized list of actions to take before publishing.

## 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": 50,
   "minItems": 1,
   "description": "Up to 50 campaign, ad, email, landing-page or GTM assets for cross-asset QA."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "package": "campaign_portfolio_audit",
  "service": "NexusEval Marketing Preflight",
  "assetCount": 10,
  "averageScore": 82,
  "weakestAssets": [],
  "overallDecision": "GO",
  "topRiskPatterns": [],
  "prioritizedActions": []
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/nexuseval-marketing-preflight-f6683b8b/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)