# Particle Pro: List Trending Podcast Guests

> Particle Pro: List Trending Podcast Guests 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 a ranked list of podcast guests currently making the rounds across multiple shows, signaling book launches, product unveils, news-cycle moments, or emerging personalities.

## Facts

- Endpoint: GET https://api.particle.pro/v1/podcasts/guests/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-guests-07cd50cd
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_uloVCcBugt9fOCfzcBlvg

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-guests-07cd50cd
```

Example prompt: Who are the top trending podcast guests right now — specifically guests who've appeared on at least 3 distinct shows in the last 30 days and are in brand-safe content only?

## When to prefer this

Choose this endpoint when you need to identify which individuals are currently appearing across multiple podcast shows simultaneously — a strong signal of PR campaigns, book launches, product unveils, or emerging public figures. It is preferable over episode-level search when the goal is trend detection across shows rather than finding specific episodes, and over guest profile lookups when you don't know who to look up yet.

## Known failure modes

- Invalid 'since' or 'first_appearance_since' date format returns a 400 error
- Unknown 'topic_id' value returns empty results or 404
- Invalid 'suitability_tier_max' enum value returns a 400 validation error
- 'min_distinct_podcasts' set very high (e.g. 10+) may return empty results for niche topics
- Expired or invalid pagination cursor returns a 400 or 422 error
- No trending guests found in the specified window returns an empty result set

## How this service works

List trending podcast guests. Surfaces guests who are currently making the podcast rounds — the kind of cross-show interview activity that signals a book launch, product unveil, news-cycle moment, or new-on-the-scene debut.

## Output

A paginated list of trending podcast guests, each with cross-show appearance counts, distinct podcast counts within the trend window, topic classifications, and brand-safety tier data. Includes an opaque cursor for fetching the next page.

## 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"
      },
      "since": {
       "type": "string",
       "description": "Inclusive lower bound of the trend window (default: 30 days ago)"
      },
      "cursor": {
       "type": "string",
       "description": "Opaque pagination cursor from previous response"
      },
      "topic_id": {
       "type": "string",
       "description": "Restrict to guests with at least one in-window appearance on an episode classified under this topic"
      },
      "suitability_tier_max": {
       "enum": [
        "SAFE",
        "LIMITED",
        "SENSITIVE",
        "UNSAFE"
       ],
       "type": "string",
       "description": "Restrict to in-window appearances on podcasts at or below this IAB Tech Lab brand-safety tier"
      },
      "min_distinct_podcasts": {
       "type": "integer",
       "format": "int64",
       "description": "Minimum number of distinct podcasts the guest must have appeared on inside the window (default 2)"
      },
      "first_appearance_since": {
       "type": "string",
       "description": "Restrict to guests whose earliest-ever appearance is on or after this date (the \"new on the scene\" cut)"
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/particle-pro-list-trending-podcast-guests-07cd50cd/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)