# BTC-USD VWAP Real-Time Price Feed

> BTC-USD VWAP Real-Time Price Feed is a paid API for AI agents from mcp.blocksize.info, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-15).

Returns real-time Volume-Weighted Average Price (VWAP) market data for the Bitcoin/US Dollar trading pair from Blocksize Capital.

## Facts

- Endpoint: GET https://mcp.blocksize.info/v1/vwap/BTC-USD
- 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/btc-usd-vwap-real-time-price-feed-21e07411
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Mb2gse0X_eAGbN0D_pZWn

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 btc-usd-vwap-real-time-price-feed-21e07411
```

Example prompt: What is the current VWAP price of Bitcoin in USD? I want the volume-weighted average price from Blocksize Capital right now.

## When to prefer this

Use this endpoint when you need real-time, volume-weighted average price (VWAP) data specifically for BTC-USD, rather than a simple last-trade price or bid-ask snapshot. VWAP is preferred for algorithmic trading signals, fair-value estimation, and execution benchmarking. Choose this over the bid-ask snapshot sibling endpoint when you need a smoothed, volume-adjusted price rather than the raw top-of-book quote.

## Known failure modes

- Payment not included or invalid x402 payment — returns 402 Payment Required
- Network or upstream data feed unavailable — may return 5xx error
- Rate limiting or quota exceeded — returns 429 Too Many Requests
- Invalid or malformed request path — returns 404 Not Found

## How this service works

Real-time crypto VWAP market data from Blocksize Capital.

## Output

Returns a JSON object containing real-time VWAP market data for BTC-USD, including a data payload, metadata indicating the provider is Blocksize Capital, and a status field confirming the request was successful.

## 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": {},
     "additionalProperties": false
    }
   },
   "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/btc-usd-vwap-real-time-price-feed-21e07411/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mcp.blocksize.info](https://www.zero.xyz/host/mcp.blocksize.info/llms.txt)