# Halowerk Trend-Hijack Relevance & Brand Safety Screener

> Halowerk Trend-Hijack Relevance & Brand Safety Screener is a paid API for AI agents from creator.halowerk.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-14).

Tokenizes campaign keywords and trend keywords, calculates keyword overlap to score trend relevance, and flags any blocked brand-safety keywords.

## Facts

- Endpoint: POST https://creator.halowerk.com/v1/trend-hijack
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-trend-hijack-relevance-brand-safety-screener-cc49f995
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_1yaXoXH5KriSURrrUmaED

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 halowerk-trend-hijack-relevance-brand-safety-screener-cc49f995 -d '<json body>'
```

Example prompt: Check whether my campaign keywords — 'sustainable fashion', 'slow fashion', 'ethical clothing' — meaningfully overlap with the trending topic 'EcoWeek' (which has keywords 'green', 'sustainability', 'conscious consumer', 'ethical') and flag if any of my keywords match my blocked list: 'fast fashion', 'disposable'.

## When to prefer this

Choose this endpoint when you need a fast, stateless relevance-and-safety screen against caller-supplied trend vocabularies before publishing campaign content. It is purpose-built for transparent keyword overlap scoring and blocked-term flagging — not for discovering live trends from social platforms or for AI-generated content recommendations. Prefer it over general-purpose NLP APIs when you need deterministic, interpretable overlap metrics with explicit brand-safety guardrails in a single lightweight call.

## Known failure modes

- Empty campaign_keywords array causes a validation error
- Trend keyword arrays exceeding 100 items are rejected
- blocked_keywords list exceeding 100 items is rejected
- Malformed input schema returns a 400 bad request
- No overlap results in zero relevance scores (valid but empty match set)
- Duplicate entries in campaign_keywords or blocked_keywords may be silently deduplicated

## How this service works

Tokenizes caller-supplied campaign and trend keywords, calculates overlap relative to the trend vocabulary, and flags any supplied blocked keyword. It neither discovers live trends nor recommends deception, impersonation or spam; its scoped purpose is a transparent relevance and brand-safety screen.

## Output

Returns per-trend relevance scores reflecting keyword token overlap between the campaign vocabulary and each trend's keyword set, plus a list of any supplied campaign keywords that match the blocked keywords list, enabling brand-safety and trend-fit decisions before campaign launch.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "trends": {
   "type": "array",
   "items": {
    "type": "object",
    "required": [
     "name",
     "keywords"
    ],
    "properties": {
     "name": {
      "type": "string",
      "maxLength": 256,
      "minLength": 1
     },
     "keywords": {
      "type": "array",
      "items": {
       "type": "string",
       "maxLength": 128,
       "minLength": 1
      },
      "maxItems": 100,
      "minItems": 1
     }
    },
    "additionalProperties": false
   },
   "maxItems": 1000,
   "minItems": 1
  },
  "blocked_keywords": {
   "type": "array",
   "items": {
    "type": "string",
    "maxLength": 128,
    "minLength": 1
   },
   "maxItems": 100,
   "uniqueItems": true
  },
  "campaign_keywords": {
   "type": "array",
   "items": {
    "type": "string",
    "maxLength": 128,
    "minLength": 1
   },
   "maxItems": 100,
   "minItems": 1,
   "uniqueItems": true
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/halowerk-trend-hijack-relevance-brand-safety-screener-cc49f995/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from creator.halowerk.com](https://www.zero.xyz/host/creator.halowerk.com/llms.txt)