# Particle Pro: List Podcast Ranking Sources

> Particle Pro: List Podcast Ranking Sources is a paid API for AI agents from api.particle.pro, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Returns all available (source, chart_type) pairs for podcast rankings on the Particle Pro API, along with row counts and data freshness for the live snapshot.

## Facts

- Endpoint: GET https://api.particle.pro/v1/podcasts/rankings/sources
- Price: $0.01/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-ranking-sources-32db8a34
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ja8Qya7oI3wpxXYFXecH2

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-ranking-sources-32db8a34
```

Example prompt: Show me all the podcast ranking sources and chart types available in Particle Pro right now, including how many rows each has and how fresh the data is.

## When to prefer this

Use this endpoint first when you need to discover which podcast ranking sources and chart types are queryable before fetching actual rankings data. It is the right choice for schema introspection, data freshness checks, or building dynamic query logic that adapts to available sources. Prefer this over directly querying rankings if you are unsure which source/chart_type combinations are valid.

## Known failure modes

- Invalid or expired cursor returns a 400 or 422 error with pagination guidance
- Unauthorized access without valid credentials returns a 401 or 402 payment required
- Empty result set if no ranking sources are currently indexed
- Rate limiting or quota exceeded returns a 429 error

## How this service works

List ranking sources. Returns each (source, chart_type) pair available on this API together with row counts and freshness for the live snapshot.

## Output

A list of (source, chart_type) pairs available on the rankings API, each accompanied by a row count indicating how many records exist in that snapshot and a freshness timestamp indicating when the live data was last updated. Supports optional pagination via limit and cursor parameters.

## 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 (default: all)"
      },
      "cursor": {
       "type": "string",
       "description": "Opaque pagination cursor from previous response"
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/particle-pro-list-podcast-ranking-sources-32db8a34/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)