# MCP Registry Radar Probe Dataset — Data Vending

> MCP Registry Radar Probe Dataset — Data Vending is a paid API for AI agents from data-vending.869biz.com, paid per call via x402, $0.008/call, status unknown (last checked 2026-09-15).

Downloads a probe-tier sample of the MCP registry radar dataset as clean JSON, paid via x402 USDC micropayment with no signup required.

## Facts

- Endpoint: GET https://data-vending.869biz.com/v1/datasets/tech.mcp_registry_radar.probe.v1/download
- Price: $0.008/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-probe-dataset-data-vending-275cf286
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_x-DRlINzzWdgL8E8vhtuK

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-probe-dataset-data-vending-275cf286
```

Example prompt: Can you download the MCP registry radar probe dataset from Data Vending for me? Use Solana USDC as the payment rail — I already have a quote ID from the quote endpoint.

## When to prefer this

Choose this endpoint when an AI agent needs a small, clean, ready-to-consume probe sample of MCP registry/radar data and can pay $0.008 USDC via x402 on Solana or Base — especially when no API key or signup is acceptable and the agent has already obtained a quote ID.

## Known failure modes

- Invalid or expired quote_id returns payment/authorization error
- Unsupported rail_id value (not solana-usdc or base-usdc) returns validation error
- Payment not confirmed on-chain results in 402 Payment Required
- Missing required parameters returns 400 Bad Request
- Dataset temporarily unavailable returns 503 Service Unavailable

## 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

Returns a JSON object with the dataset SKU ('tech.mcp_registry_radar.probe.v1'), tier ('probe'), an array of up to 5 MCP registry items each with a title and source count, the as-of date, item limit, and an optional upgrade_to field pointing to a higher-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.probe.v1",
  "tier": "probe",
  "items": [
   {
    "title": "string",
    "source_count": 1
   }
  ],
  "as_of_date": "2026-06-06",
  "item_limit": 5,
  "upgrade_to": null
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/mcp-registry-radar-probe-dataset-data-vending-275cf286/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)