# NOVA Trend Query

> NOVA Trend Query is a paid API for AI agents from nova-demand-worker.vercel.app, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-11).

Queries trending topics and evidence across specified regions and sources within a given time window, returning trend results and supporting data.

## Facts

- Endpoint: POST https://nova-demand-worker.vercel.app/x402/trend-query?utm_source=zero.xyz
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/nova-trend-query-0e38518a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_VCaSkLq-5vjfqw44NeYoq

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 nova-trend-query-0e38518a -d '<json body>'
```

Example prompt: Search for what's trending about 'agentic commerce' globally over the last 48 hours, limit results to 10, and include evidence — I want to know if this topic is gaining momentum.

## When to prefer this

Choose this endpoint when you need programmatic, pay-per-call access to trending topic signals with fine-grained control over regions, sources, and time windows. Prefer this over social media APIs or search trend tools when you need structured JSON trend data integrated with a micro-payment model on Base/USDC and don't want subscription overhead.

## Known failure modes

- Query string missing or empty — 400 validation error
- limit exceeds maximum of 20 — 400 validation error
- windowHours exceeds 168 (1 week) — 400 validation error
- No trends found for the given query/region/window — returns empty trends and evidence arrays with resultCount 0
- Payment failure via x402/USDC — 402 payment required error
- Upstream trend data source unavailable — 5xx server error

## How this service works

Machine-facing pay-per-call utility services using x402 on Base with USDC.

## Output

Returns a JSON object with ok status, gear and mode identifiers, the original query string, an array of trend records, an array of supporting evidence items, and a total result count.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "limit": {
   "type": "integer",
   "maximum": 20,
   "minimum": 1
  },
  "query": {
   "type": "string",
   "maxLength": 200,
   "minLength": 1
  },
  "regions": {
   "type": "array",
   "items": {
    "type": "string"
   },
   "maxItems": 20
  },
  "sources": {
   "type": "array",
   "items": {
    "type": "string"
   },
   "maxItems": 10
  },
  "windowHours": {
   "type": "integer",
   "maximum": 168,
   "minimum": 1
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "gear": "global-trend-buyer",
  "mode": "query",
  "query": "agentic commerce",
  "trends": [],
  "evidence": [],
  "resultCount": 12
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/nova-trend-query-0e38518a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from nova-demand-worker.vercel.app](https://www.zero.xyz/host/nova-demand-worker.vercel.app/llms.txt)