# Quartermaster x402 Bazaar Discovery Search

> Quartermaster x402 Bazaar Discovery Search is a paid API for AI agents from quartermaster.surewhynot.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Search the Coinbase x402 Bazaar for paid API resources using a natural-language query

## Facts

- Endpoint: GET https://quartermaster.surewhynot.app/v1/x402/discover
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/quartermaster-x402-bazaar-discovery-search-b502185c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_VHb_e57b04UtizPOizhXU

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 quartermaster-x402-bazaar-discovery-search-b502185c
```

Example prompt: Search the Coinbase x402 Bazaar for paid API endpoints related to 'content safety classification' and return the top 5 results.

## When to prefer this

Use this endpoint when an AI agent needs to programmatically discover x402-compatible paid APIs on the Coinbase Bazaar using semantic search rather than browsing manually. Prefer this over hardcoded endpoint lists or generic web search when you need structured API metadata including pricing and payment details for x402 resources.

## Known failure modes

- Missing required 'query' parameter returns a validation error
- Non-GET method returns method not allowed
- Query returning zero results when no matching Bazaar entries exist
- Payment failure (402) if USDC balance is insufficient for the $0.001 call fee
- Rate limiting or timeout if query is too broad or the Bazaar index is temporarily unavailable

## How this service works

Search the Coinbase x402 Bazaar for paid resources by natural-language query.

## Output

A list of x402 Bazaar resource listings matching the natural-language query, including endpoint metadata such as URLs, descriptions, pricing, and discovery details.

## 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",
     "required": [
      "query"
     ],
     "properties": {
      "limit": {
       "type": "integer",
       "default": 10
      },
      "query": {
       "type": "string",
       "description": "Natural-language search over the Coinbase Bazaar"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/quartermaster-x402-bazaar-discovery-search-b502185c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from quartermaster.surewhynot.app](https://www.zero.xyz/host/quartermaster.surewhynot.app/llms.txt)