# Particle Pro: List Podcast Guests

> Particle Pro: List Podcast Guests is a paid API for AI agents from api.particle.pro, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-14).

Returns a paginated directory of persons who have appeared as guests (non-host) on podcast episodes, filterable by name, podcast, topic, date, and brand-safety tier.

## Facts

- Endpoint: GET https://api.particle.pro/v1/podcasts/guests
- Price: $0.03/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-podcast-guests-23a1d327
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ZQeQbB73pESgfpHuuNb10

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-podcast-guests-23a1d327
```

Example prompt: Show me the top 20 podcast guests who've appeared most frequently on episodes about technology since 2023-01-01 — only include guests from brand-safe podcasts (SAFE tier max).

## When to prefer this

Use this endpoint when you need to discover, browse, or search for people who have appeared as podcast guests — especially when filtering by podcast show, topic area, recency, appearance frequency, or brand safety. Prefer this over episode-level endpoints when the focus is on the person/guest rather than individual episodes. It is the right choice for building guest directories, researching potential interview subjects, or analyzing who has appeared in a given niche.

## Known failure modes

- Invalid podcast_id or topic_id returns empty results or 404
- Invalid appeared_since date format (non-ISO 8601) causes a 400 validation error
- Invalid suitability_tier_max enum value returns a 400 error
- Expired or malformed cursor causes a 400 pagination error
- No guests match the filters — returns empty results list
- Rate limiting or payment failure returns 402 or 429

## How this service works

List podcast guests. Returns a paginated directory of Persons who have appeared on at least one podcast episode in a non-host listing role.

## Output

A paginated list of Person objects, each representing a podcast guest with their display name, appearance count, associated podcasts, and episode metadata. Includes a pagination cursor 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": {
      "q": {
       "type": "string",
       "description": "Case-insensitive substring match against the guest's display name"
      },
      "sort": {
       "enum": [
        "appearances",
        "recency"
       ],
       "type": "string",
       "description": "Sort order (default: appearances)"
      },
      "limit": {
       "type": "integer",
       "format": "int64",
       "description": "Results per page"
      },
      "cursor": {
       "type": "string",
       "description": "Opaque pagination cursor from previous response"
      },
      "topic_id": {
       "type": "string",
       "description": "Restrict to guests with at least one appearance on an episode classified under this topic"
      },
      "podcast_id": {
       "type": "string",
       "description": "Restrict to guests who have appeared on this podcast (slug or ID)"
      },
      "appeared_since": {
       "type": "string",
       "description": "Only include guests with at least one appearance published on or after this ISO 8601 date"
      },
      "min_appearances": {
       "type": "integer",
       "format": "int64",
       "description": "Minimum lifetime appearance count to include (default 1)"
      },
      "suitability_tier_max": {
       "enum": [
        "SAFE",
        "LIMITED",
        "SENSITIVE",
        "UNSAFE"
       ],
       "type": "string",
       "description": "Restrict to guests whose appearances are on podcasts at or below this IAB Tech Lab brand-safety tier"
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/particle-pro-list-podcast-guests-23a1d327/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)