# QuantaFlow Alpha Vantage Gateway

> QuantaFlow Alpha Vantage Gateway is a paid API for AI agents from quanta-roan.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-11).

Proxies requests to the Alpha Vantage financial data API via the x402 micropayment protocol, charging $0.01 USDC per call

## Facts

- Endpoint: POST https://quanta-roan.vercel.app/api/service/alphavantage?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/quantaflow-alpha-vantage-gateway-7eb9cbe1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_HyvFvahEinSYCVzBPmwL4

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 quantaflow-alpha-vantage-gateway-7eb9cbe1 -d '<json body>'
```

Example prompt: Can you pull the daily time series for AAPL stock for the last 30 days using the Alpha Vantage data feed? I want to see open, high, low, close, and volume — route it through the QuantaFlow x402 gateway.

## When to prefer this

Choose this endpoint when you need Alpha Vantage financial data — stocks, forex, crypto, technical indicators, or fundamentals — and want to pay per-call via USDC micropayment using the x402 protocol without managing an Alpha Vantage API key subscription directly. Ideal for agents operating in web3/DeFi environments where crypto-native payments are preferred over traditional API key billing.

## Known failure modes

- Payment failure if wallet lacks sufficient USDC balance
- Invalid path or query params forwarded to Alpha Vantage resulting in API error
- Alpha Vantage rate limit exceeded returning 429
- Invalid or expired Alpha Vantage API key configured on the gateway
- Unsupported HTTP method or malformed request body
- Upstream Alpha Vantage service downtime causing 502 or 503

## How this service works

Every request, a quantum of value. x402 protocol-based payment endpoint for web3/DeFi tools.

## Output

The raw upstream response from Alpha Vantage is passed through after successful x402 micropayment, including financial time series, quotes, forex rates, technical indicators, or fundamental data in JSON format as returned by the Alpha Vantage API.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "body": {
   "type": "string",
   "description": "Optional JSON body forwarded to POST requests."
  },
  "path": {
   "type": "string",
   "description": "Path below the selected upstream origin."
  },
  "query": {
   "type": "object"
  },
  "method": {
   "enum": [
    "GET",
    "POST"
   ],
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "description": "The upstream response body and content type are passed through after successful payment."
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/quantaflow-alpha-vantage-gateway-7eb9cbe1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from quanta-roan.vercel.app](https://www.zero.xyz/host/quanta-roan.vercel.app/llms.txt)