# ScriptMasterLabs MCP x402 Market Endpoint

> ScriptMasterLabs MCP x402 Market Endpoint is a paid API for AI agents from mcp-x402-discovery.onrender.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Returns marketplace listing data for NAICS-code-filtered pay-per-call data APIs covering crypto, RWA, federal, SEC, and housing compliance topics

## Facts

- Endpoint: GET https://mcp-x402-discovery.onrender.com/x402/market
- 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/scriptmasterlabs-mcp-x402-market-endpoint-1943c6a3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_u2JoqqNHfMPb42MPiQwCx

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 scriptmasterlabs-mcp-x402-market-endpoint-1943c6a3
```

Example prompt: Show me the available x402 marketplace data APIs for NAICS code 523110 covering the last 3 years — I want to see what pay-per-call crypto and SEC compliance endpoints are listed.

## When to prefer this

Use this endpoint when you need to discover which pay-per-call data APIs are available for a specific industry vertical (identified by NAICS code) within the x402 micropayment ecosystem, especially for crypto, SEC, federal compliance, or housing data use cases. Prefer it over general API directories when you specifically want x402-compatible, USDC-payable endpoints scoped to a regulated or financial domain.

## Known failure modes

- Missing or invalid NAICS code returns a 400 or validation error
- Unpaid request to production endpoint returns HTTP 402 Payment Required unless a valid X-Api-Market-Key or x402 USDC payment header is provided
- NAICS code with no matching listings returns an empty result set
- Years parameter out of range (must be 1–10) causes a validation error
- Service unavailable on free Render.com hosting tier returns 503 or timeout

## How this service works

Pay-per-call crypto, RWA, federal, SEC, Section 8/HUD housing, and compliance APIs via x402. Primary: USDC on Base (eip155:8453). Also accepts Global Dollar (USDG) on Robinhood Chain (eip155:4663) via sovereign X-PAYMENT-TX. Hyphen routes only (e.g. /x402/gas-tracker, /x402/pha-lookup, /x402/sec-8k). MARKETPLACE REVIEW: use free /x402/playground/* (no key, no payment). Production /x402/* returns 402 unless paid via x402 or X-Api-Market-Key / X-API-Key from seller dashboard.

## Output

A list of available pay-per-call API products on the x402 marketplace, filtered by the provided NAICS industry code and year range. Each listing likely includes endpoint names, descriptions, pricing, and categories such as crypto, RWA, SEC filings, federal data, or Section 8/HUD housing compliance.

## 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": {
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "naics"
     ],
     "properties": {
      "naics": {
       "type": "string",
       "description": "6-digit NAICS code (required)."
      },
      "years": {
       "type": "integer",
       "default": 3,
       "maximum": 10,
       "minimum": 1
      }
     }
    }
   }
  },
  "output": {
   "properties": {
    "example": {}
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "example": {}
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/scriptmasterlabs-mcp-x402-market-endpoint-1943c6a3/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mcp-x402-discovery.onrender.com](https://www.zero.xyz/host/mcp-x402-discovery.onrender.com/llms.txt)