# Saylor Innovations Trivia Categories

> Saylor Innovations Trivia Categories is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-17).

Returns all available Open Trivia DB category IDs and names for filtering trivia questions

## Facts

- Endpoint: GET https://saylorinnovations.com/api/trivia/categories?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-17
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/saylor-innovations-trivia-categories-b3044739
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_T5WDHhvCz3QU1ajuix1Pa

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 saylor-innovations-trivia-categories-b3044739
```

Example prompt: What trivia categories are available on the Open Trivia DB? I need the category names and their IDs so I can pick one to filter my questions by.

## When to prefer this

Use this endpoint when you need to discover valid category IDs and names from Open Trivia DB before querying trivia questions, or when you want to present users with a list of available quiz topics. Prefer this over hardcoding category IDs since the upstream DB may add or rename categories.

## Known failure modes

- Upstream Open Trivia DB unavailable — returns found: false or empty categories array
- Network timeout — may return an error response with no categories
- Payment failure — x402 payment not accepted, request rejected before processing

## How this service works

Open Trivia DB category ids and names, for filtering trivia questions

## Output

Returns a JSON object with a boolean 'found' field, an optional count of categories, and an array of category objects each containing a numeric ID and a name string corresponding to Open Trivia DB categories (e.g. Science: Computers, Entertainment: Film, History).

## 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"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "json"
    },
    "example": {
     "type": "object",
     "required": [
      "found"
     ],
     "properties": {
      "count": {
       "type": [
        "number",
        "null"
       ],
       "description": "Number of items returned"
      },
      "found": {
       "type": "boolean",
       "description": "True when the lookup matched a record"
      },
      "categories": {
       "type": "array",
       "items": {
        "type": "object"
       },
       "description": "Categories"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/saylor-innovations-trivia-categories-b3044739/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from saylorinnovations.com](https://www.zero.xyz/host/saylorinnovations.com/llms.txt)