# Bot Bazaar Domain Agent & x402 Discovery Checker

> Bot Bazaar Domain Agent & x402 Discovery Checker is a paid API for AI agents from bot-bazaar.fly.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-30).

Probes a domain for agent and x402 readiness by checking /.well-known/x402, /llms.txt, and /mcp endpoints, reporting status codes, latency, x402 resource count, and MCP/LLMs.txt presence.

## Facts

- Endpoint: GET https://bot-bazaar.fly.dev/v1/x402/domain-check?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/bot-bazaar-domain-agent-x402-discovery-checker-a970ab17
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_bJNvSZBnFGAiwZGmJksfB

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 bot-bazaar-domain-agent-x402-discovery-checker-a970ab17
```

Example prompt: Can you check whether openai.com is ready for AI agent discovery — does it have an x402 payment manifest, an llms.txt, and an MCP endpoint?

## When to prefer this

Use this endpoint when you need to quickly assess whether a specific domain has published agent-facing infrastructure — x402 payment resources, an llms.txt file, or an MCP endpoint — before attempting integration or payment flows. Prefer this over manual HTTP checks when you want a single consolidated readiness report with latency data across all three standard agent-discovery paths.

## Known failure modes

- Domain does not exist or is unreachable — probe returns connection error or timeout
- Domain uses HTTP-only (no HTTPS) — endpoint may reject or fail to probe
- All three paths return 404 — domain exists but has no agent/x402 infrastructure
- Rate limiting or firewall on the target domain causes unexpected status codes
- Malformed or missing 'domain' or 'url' query parameter returns a validation error

## How this service works

Check a domain's agent and x402 discovery readiness: probes /.well-known/x402, /llms.txt, and /mcp over HTTPS and reports status codes, latency, discovered x402 resource count, whether /llms.txt is present, and whether /mcp is detected.

## Output

Returns status codes and latency for each probed path (/.well-known/x402, /llms.txt, /mcp), the number of x402 resources discovered, a boolean for llms.txt presence, and a boolean for MCP detection — giving a full agent/x402 readiness snapshot for the target domain.

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "url": {
       "type": "string",
       "format": "uri",
       "description": "Or an https URL on the target domain"
      },
      "domain": {
       "type": "string",
       "description": "Domain name to check (e.g. blockrun.ai)"
      }
     }
    }
   },
   "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/bot-bazaar-domain-agent-x402-discovery-checker-a970ab17/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from bot-bazaar.fly.dev](https://www.zero.xyz/host/bot-bazaar.fly.dev/llms.txt)