# Particle Pro: List Trending Podcast Sponsors

> Particle Pro: List Trending Podcast Sponsors is a paid API for AI agents from api.particle.pro, paid per call via x402, $0.04/call, status unknown (last checked 2026-09-14).

Returns advertisers whose podcast ad volume is accelerating, ranked by growth in ad placements over a configurable trailing time window.

## Facts

- Endpoint: GET https://api.particle.pro/v1/podcasts/advertising/sponsors/trends
- Price: $0.04/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/particle-pro-list-trending-podcast-sponsors-ad4f8ae8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_UgAFvvW-CEBPNNzgWJ2T8

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 particle-pro-list-trending-podcast-sponsors-ad4f8ae8
```

Example prompt: Show me which podcast advertisers are trending right now — look at a 30-day comparison window, only include sponsors who spread their ads across at least 5 different podcasts, and return the top 20 results.

## When to prefer this

Use this endpoint when you need a ranked, time-windowed view of which advertisers are growing their podcast presence — not just who advertises, but who is accelerating. Prefer this over the company advertising profile endpoint when you don't have a specific company in mind and want to discover emerging sponsors. The min_podcast_reach filter makes it robust against single-show spikes, making it reliable for competitive intelligence and sales prospecting.

## Known failure modes

- Invalid window_days value (e.g. zero or negative) returns a 400 error
- Cursor from a different query context may return a 400 or empty results
- min_podcast_reach set too high may return an empty result set with no error
- Rate limiting or payment failure (402) if USDC balance is insufficient
- Transient 500 errors if upstream podcast data pipeline is delayed

## How this service works

List trending sponsors. Surfaces advertisers whose podcast ad volume is accelerating.

## Output

A paginated list of advertisers (sponsors) ranked by the acceleration of their podcast ad volume — comparing ad placements in the most recent window_days period against the equally-sized prior period. Each record surfaces the sponsor identity and trend signal. A pagination cursor is included for fetching subsequent pages.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "limit": {
       "type": "integer",
       "format": "int64",
       "description": "Results per page"
      },
      "cursor": {
       "type": "string",
       "description": "Opaque pagination cursor from previous response"
      },
      "window_days": {
       "type": "integer",
       "format": "int64",
       "description": "Length in days of each comparison window. Sponsors are ranked by ads aired in the trailing window_days versus the equal-length window immediately before it."
      },
      "min_podcast_reach": {
       "type": "integer",
       "format": "int64",
       "description": "Only include sponsors whose in-window ads span at least this many distinct podcasts. Guards the ranking against a single show binge-publishing episodes of one sponsor."
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/particle-pro-list-trending-podcast-sponsors-ad4f8ae8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.particle.pro](https://www.zero.xyz/host/api.particle.pro/llms.txt)