# Particle Pro: List Entity Types

> Particle Pro: List Entity Types 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 the list of entity categories supported as valid values for the 'type' parameter when querying entities or searching podcast episodes.

## Facts

- Endpoint: GET https://api.particle.pro/v1/entities/types
- 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-entity-types-1970fdbe
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_fc8F_vXSRrn_kvrnDycNj

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-entity-types-1970fdbe
```

Example prompt: What entity types does Particle Pro support — I need to know the valid values I can pass as the 'type' parameter when searching podcast entities or filtering episode searches.

## When to prefer this

Use this endpoint before querying /v1/entities or searching podcast episodes by entity type, to discover and validate the exact type values accepted by those endpoints. Essential for dynamic UI population or agent workflows that need to enumerate valid filter options without hardcoding them.

## Known failure modes

- Invalid or expired pagination cursor returns an error or empty result
- Exceeding rate limits may result in 429 Too Many Requests
- Network or upstream errors return 5xx responses
- Invalid limit parameter type may return a 400 error

## How this service works

List entity types. Returns the entity categories supported as values for the type query parameter on /v1/entities and the entity_type query parameter on /v1/podcasts/episodes/search.

## Output

A list of entity type categories (e.g., person, brand, topic) that are valid values for the 'type' query parameter on /v1/entities and the 'entity_type' parameter on /v1/podcasts/episodes/search, with optional pagination via cursor and limit.

## 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-entity-types-1970fdbe/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)