# Particle Pro – List Podcast Sponsors

> Particle Pro – List 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 all sponsors advertising on a specific podcast, with per-sponsor ad count, distinct episode count, and most recent placement, ordered by ad count descending.

## Facts

- Endpoint: GET https://api.particle.pro/v1/podcasts/:id/advertising/sponsors
- 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-podcast-sponsors-bdfa2ef5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_WRrfaTX6JTqxERibg8Fe4

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-sponsors-bdfa2ef5
```

Example prompt: Pull the full list of sponsors advertising on the 'huberman-lab' podcast — show me each sponsor's ad count, how many distinct episodes they appeared in, and their most recent placement, ranked by most ads first.

## When to prefer this

Use this endpoint when you need to enumerate all advertising sponsors for a specific podcast and analyze their ad volume and recency. Prefer this over company-centric endpoints when the podcast is your primary axis of analysis — for example, researching who advertises on a show, auditing a podcast's advertiser mix, or building a sponsor database per show. If you need to find which podcasts a specific company advertises on, use the companion 'List podcasts carrying company advertising' endpoint instead.

## Known failure modes

- Unknown podcast ID or slug returns 404 not found
- Invalid date format in 'since' or 'until' returns 400 bad request
- Invalid company_id returns empty results or 404
- Malformed cursor returns 400 or empty page
- No sponsors found returns empty list (not an error)
- Expired or invalid x402 payment token returns 402 payment required

## How this service works

List sponsors advertising on a podcast. Returns per-sponsor ad activity on a single podcast (ads, distinct episodes, most recent placement), ordered by ad count descending.

## Output

A paginated list of sponsors for the specified podcast, each entry including the sponsor name/ID, total ad count, number of distinct episodes the sponsor appeared in, and the date of their most recent ad placement. Results are sorted by ad count descending. The response also includes a pagination cursor for retrieving 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"
    },
    "pathParams": {
     "type": "object",
     "required": [
      "id"
     ],
     "properties": {
      "id": {
       "type": "string",
       "description": "Podcast slug (e.g., 'all-in'), internal ID, or numeric iTunes ID"
      }
     }
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "limit": {
       "type": "integer",
       "format": "int64",
       "description": "Results per page"
      },
      "since": {
       "type": "string",
       "description": "Only include ads from episodes published on or after this ISO 8601 date or date-time"
      },
      "until": {
       "type": "string",
       "description": "Only include ads from episodes published before this ISO 8601 date or date-time"
      },
      "cursor": {
       "type": "string",
       "description": "Opaque pagination cursor from previous response"
      },
      "company_id": {
       "type": "string",
       "description": "Scope to sponsors linked to this company (ID, domain, or entity slug) — e.g. every brand of one advertiser on this show"
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/particle-pro-list-podcast-sponsors-bdfa2ef5/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)