# World Hack Expertise Query

> World Hack Expertise Query is a paid API for AI agents from world-hack.vercel.app, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-22).

Queries a knowledge or expertise database to retrieve relevant information or expert answers based on a given question or topic.

## Facts

- Endpoint: POST https://world-hack.vercel.app/api/expertise/query?utm_source=zero.xyz
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/world-hack-vercel-app-3df605c6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_jeAk40ru678s7pDliJ50P

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 world-hack-vercel-app-3df605c6 -d '<json body>'
```

Example prompt: Can you query the world-hack expertise system to find expert knowledge on distributed systems architecture and tell me what it returns?

## When to prefer this

Use this endpoint when you need to retrieve specialized expert knowledge or domain-specific answers from a curated expertise system, particularly when you want to pay per query via x402/USDC micropayments rather than subscribing to a broader API.

## Known failure modes

- Invalid or missing query parameter returns 400 error
- Payment not provided or insufficient USDC results in 402 payment required
- Query too vague returns empty or low-confidence results
- Service unavailable or cold-start latency on Vercel returns 500 or timeout
- Unsupported expertise domain returns no matches

## Output

Returns expertise-related information or answers relevant to the submitted query, likely including matched knowledge snippets, expert insights, or structured responses tied to the queried domain or topic.

## 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",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object",
     "required": [
      "profileId",
      "question"
     ],
     "properties": {
      "question": {
       "type": "string",
       "maxLength": 5000,
       "minLength": 1,
       "description": "Plain-English question for the expert."
      },
      "profileId": {
       "type": "string",
       "format": "uuid",
       "description": "The expert to query. Obtain from GET /api/bazaar or /api/agents."
      }
     }
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "success",
      "data"
     ],
     "properties": {
      "data": {
       "type": "object",
       "required": [
        "answer",
        "amount"
       ],
       "properties": {
        "amount": {
         "type": "number"
        },
        "answer": {
         "type": "string"
        },
        "earningId": {
         "type": "string",
         "format": "uuid"
        },
        "toolsUsed": {
         "type": "array",
         "items": {
          "type": "string"
         }
        }
       }
      },
      "success": {
       "type": "boolean"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/world-hack-vercel-app-3df605c6/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from world-hack.vercel.app](https://www.zero.xyz/host/world-hack.vercel.app/llms.txt)