# Particle Pro: Podcast Publisher Brand-Suitability Leaderboard

> Particle Pro: Podcast Publisher Brand-Suitability Leaderboard 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 paginated, ranked leaderboard of podcast publishers ordered by IAB/GARM brand-suitability composition metrics.

## Facts

- Endpoint: GET https://api.particle.pro/v1/podcasts/suitability/publishers/leaderboard
- 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-podcast-publisher-brand-suitability-leaderboard-9e685647
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_DNx9P7lUe8zx9ks9CShUV

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-podcast-publisher-brand-suitability-leaderboard-9e685647
```

Example prompt: Pull the top 20 safest podcast publishers from Particle Pro's brand-suitability leaderboard — rank them by SAFE share and only include publishers with at least 50 analyzed podcasts.

## When to prefer this

Use this endpoint when you need a cross-publisher comparison of brand suitability at the network/publisher level rather than the individual podcast level. It is the right choice for media planners building inclusion/exclusion lists, for automated campaign targeting workflows that need to rank and filter publishers by GARM/IAB safety composition, or when you need paginated, sorted access to the full publisher universe rather than data on a single show.

## Known failure modes

- Invalid metric enum value returns a 400 error
- Cursor from a different query context may return unexpected or empty results
- min_analyzed_podcasts set too high may return an empty list if no publishers meet the threshold
- Rate limiting or payment failure (x402) if USDC balance is insufficient
- No data available for a requested page beyond the last result set

## How this service works

Get a cross-publisher suitability leaderboard. Returns a paginated, ranked list of podcast publishers by IAB/GARM brand-suitability composition.

## Output

A paginated, ranked list of podcast publishers with their IAB/GARM brand-suitability composition metrics, including SAFE, UNSAFE, and LIMITED content shares, total analyzed podcast counts, and 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"
      },
      "cursor": {
       "type": "string",
       "description": "Opaque pagination cursor from previous response"
      },
      "metric": {
       "enum": [
        "safest",
        "riskiest",
        "most_placeable",
        "most_analyzed"
       ],
       "type": "string",
       "description": "How to rank publishers. safest sorts by SAFE share of the analyzed catalog (desc); riskiest sorts by UNSAFE share (desc); most_placeable sorts by combined SAFE + LIMITED share (desc) — the 'broadly buyable' slice; most_analyzed sorts by absolute analyzed_podcasts count (desc)."
      },
      "min_analyzed_podcasts": {
       "type": "integer",
       "format": "int64",
       "description": "Exclude publishers with fewer than this many analyzed podcasts. Guards against tiny catalogs dominating share-based metrics."
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/particle-pro-podcast-publisher-brand-suitability-leaderboard-9e685647/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)