# Particle Pro – List Related Episodes

> Particle Pro – List Related Episodes 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 episodes from other podcasts that cover the same story or subject as a given episode, ranked by content similarity, shared entities, shared topics, and shared news stories.

## Facts

- Endpoint: GET https://api.particle.pro/v1/podcasts/episodes/:id/related
- 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-related-episodes-0e12cdfb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_L-wJMZLM0xClW7JMUJqur

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-related-episodes-0e12cdfb
```

Example prompt: Find me other podcast episodes that covered the same story as episode 'nvidia-earnings-q4-2024' on Particle Pro — limit to episodes published within 14 days of it and include the basis signals so I can see which entities and topics they share.

## When to prefer this

Use this endpoint when you need cross-show podcast discovery — specifically to find what other podcasts covered the same story, topic, or guest as a known episode. It is preferable over a general keyword podcast search when you want semantically ranked, entity-aware results grounded in a specific episode's content. The published_within_days filter makes it particularly useful for 'who else covered this breaking story' use cases within a short news cycle window.

## Known failure modes

- Episode ID not found — 404 if the slug or ID does not exist
- No related episodes found — empty results list if the episode has insufficient content signals
- Pagination cursor invalid — error if a stale or malformed cursor is passed
- Rate limiting or payment failure — 402 if the x402 payment is not provided or insufficient
- published_within_days too narrow — may return zero results if the time window excludes all candidates

## How this service works

List related episodes. Returns episodes from other shows that cover the same story or subject as this episode, best first: a live nearest-neighbour search over episode content, reranked on shared salient entities, shared topics and a shared

## Output

A paginated list of related podcast episodes from other shows, ordered best-first by a combined relevance score. Each result includes episode metadata (title, show, publish date). When include=basis is passed, each result also includes: content similarity score, shared named entities with their names, shared topics, any shared news story, shared guests, and the number of days apart the two episodes were published.

## 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": "Episode slug or ID"
      }
     }
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "limit": {
       "type": "integer",
       "format": "int64",
       "description": "Results per page"
      },
      "cursor": {
       "type": "string",
       "description": "Opaque pagination cursor from previous response"
      },
      "include": {
       "type": "array",
       "items": {
        "type": "string"
       },
       "description": "Optional response sections. Pass include=basis to attach, for every result, the signals that make the two episodes related: content similarity, shared entities (with names), shared topics, a shared news story, shared guests, and days apart."
      },
      "same_podcast": {
       "type": "boolean",
       "description": "Admit episodes of the same show. Off by default: a show's own episodes are its episode list (GET /v1/podcasts/{id}/episodes), not its related content."
      },
      "published_within_days": {
       "type": "integer",
       "format": "int64",
       "description": "Only episodes published within this many days of the query episode, on either side. Omit (or 0) for no window. Use a short window (7–30) for 'who else covered this story'."
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/particle-pro-list-related-episodes-0e12cdfb/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)