# NO HANDS AI – Endpoint Preflight (HTTP 402 / x402 Inspector)

> NO HANDS AI – Endpoint Preflight (HTTP 402 / x402 Inspector) is a paid API for AI agents from nohands-coinbase-bazaar.bytoken2023.workers.dev, paid per call via x402, $0.015002/call, status unknown (last checked 2026-11-02).

Inspects a public HTTPS endpoint's HTTP 402 payment requirements, Base/USDC pricing, and Bazaar discovery schema without actually paying for it.

## Facts

- Endpoint: GET https://nohands-coinbase-bazaar.bytoken2023.workers.dev/v1/endpoint-preflight?utm_source=zero.xyz
- Price: $0.015002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-11-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/no-hands-ai-endpoint-preflight-http-402-x402-inspector-4108d489
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ZA_BOemWqjv6hiH5_43m9

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 no-hands-ai-endpoint-preflight-http-402-x402-inspector-4108d489
```

Example prompt: Before I pay anything, can you inspect the HTTP 402 payment requirements and USDC price for https://some-paid-api.example.com/v1/data and show me its Bazaar discovery schema?

## When to prefer this

Use this endpoint when an agent needs to understand the cost and payment requirements of an x402-gated API before committing to a payment, or when cataloguing/auditing Bazaar-listed endpoints for pricing and schema discovery. Prefer this over directly calling the paid endpoint when you want a zero-cost pre-check of payment metadata.

## Known failure modes

- Target URL is not publicly reachable (network error or DNS failure)
- Target endpoint does not return HTTP 402 or has no x402 payment headers
- Bazaar discovery schema is absent or malformed on the target
- Invalid or non-HTTPS URL provided
- Rate limiting or upstream timeout from the inspected origin

## How this service works

Inspect a public HTTPS endpoint without paying it. Read its HTTP 402 payment requirements, Base/USDC pricing and Bazaar discovery schema.

## Output

Returns the target endpoint's HTTP 402 payment requirements including the required payment token (USDC), price, chain (Base), payment header format, and any Bazaar discovery schema metadata — all retrieved without executing a payment transaction.

## 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": [
      "url"
     ],
     "properties": {
      "url": {
       "type": "string",
       "pattern": "^https://",
       "description": "Exact public HTTPS endpoint URL to inspect without sending a payment."
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "target_url",
      "observed_at",
      "http_status",
      "x402",
      "warnings",
      "payment_tested"
     ],
     "properties": {
      "x402": {
       "type": "object"
      },
      "warnings": {
       "type": "array",
       "items": {
        "type": "string"
       }
      },
      "target_url": {
       "type": "string"
      },
      "http_status": {
       "type": [
        "integer",
        "null"
       ]
      },
      "observed_at": {
       "type": "string"
      },
      "payment_tested": {
       "type": "boolean",
       "const": false
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/no-hands-ai-endpoint-preflight-http-402-x402-inspector-4108d489/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from nohands-coinbase-bazaar.bytoken2023.workers.dev](https://www.zero.xyz/host/nohands-coinbase-bazaar.bytoken2023.workers.dev/llms.txt)