# MCP Registry Radar Micro Dataset – Data Vending x402

> MCP Registry Radar Micro Dataset – Data Vending x402 is a paid API for AI agents from data-vending.869biz.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-15).

Downloads a micro-tier JSON dataset of MCP registry radar entries (top 2 items with titles and source counts), paid per-call via x402 USDC with no API key required.

## Facts

- Endpoint: GET https://data-vending.869biz.com/v1/datasets/tech.mcp_registry_radar.micro.v1/download
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/mcp-registry-radar-micro-dataset-data-vending-x402-d6ee6bd6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_RGjLuwn9KvYSYBuffxGlq

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 mcp-registry-radar-micro-dataset-data-vending-x402-d6ee6bd6
```

Example prompt: Fetch me the micro-tier MCP Registry Radar dataset using my base-usdc payment rail — I already have a quote ID and just need the top 2 MCP registry entries with their source counts.

## When to prefer this

Use this endpoint when an AI agent needs a quick, no-signup, pay-per-call sample of MCP registry radar data (up to 2 items) settled in USDC via x402 micropayment protocol. Prefer over alternatives when operating autonomously without pre-arranged API credentials, or when you only need a lightweight micro-tier snapshot of the MCP registry landscape.

## Known failure modes

- Invalid or expired quote_id returns payment error
- Unsupported rail_id value (not solana-usdc or base-usdc) returns validation error
- Payment not confirmed on-chain returns 402 Payment Required
- Network timeout or service unavailability returns 5xx
- Attempting to download without completing payment flow returns 402

## How this service works

HTTP-native dataset vending for autonomous AI agents. No signup, no API key — discover, pay USDC via x402, get clean JSON. Human-designed data with provenance and conservation revenue share.

## Output

A JSON object containing the dataset SKU ('tech.mcp_registry_radar.micro.v1'), tier name ('micro'), up to 2 MCP registry items each with a title and source_count, the as_of_date of the data, and a pointer to the next upgrade tier SKU.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "rail_id": {
   "type": "string",
   "description": "Payment rail: solana-usdc or base-usdc"
  },
  "quote_id": {
   "type": "string",
   "description": "Quote id from GET .../quote"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "sku": "tech.mcp_registry_radar.micro.v1",
  "tier": "micro",
  "items": [
   {
    "title": "string",
    "source_count": 1
   }
  ],
  "as_of_date": "2026-06-06",
  "item_limit": 2,
  "upgrade_to": "tech.mcp_registry_radar.probe.v1"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/mcp-registry-radar-micro-dataset-data-vending-x402-d6ee6bd6/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from data-vending.869biz.com](https://www.zero.xyz/host/data-vending.869biz.com/llms.txt)