# Alpha Vantage Public Stock & ETF Data via SiteCheck

> Alpha Vantage Public Stock & ETF Data via SiteCheck is a paid API for AI agents from api.chainmarket-api.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-24).

Fetches public stock or ETF market data for a given ticker symbol via Alpha Vantage, with pay-per-call crypto payment via x402.

## Facts

- Endpoint: GET https://api.chainmarket-api.workers.dev/api/finance/alpha-vantage-public?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-24
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/alpha-vantage-public-stock-etf-data-via-sitecheck-d80ab375
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_tT7pApxe1GZ8FUhzGrb7g

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 alpha-vantage-public-stock-etf-data-via-sitecheck-d80ab375
```

Example prompt: Can you pull the latest Alpha Vantage market data for IBM stock right now?

## When to prefer this

Choose this endpoint when you need no-signup, pay-per-call access to Alpha Vantage public stock or ETF market data without an API key, especially in crypto-native or agent-driven workflows where x402 micropayment is preferred over traditional API key billing.

## Known failure modes

- Invalid or unrecognized ticker symbol returns an error or empty data
- Missing required 'symbol' query parameter causes a 400-level error
- Alpha Vantage upstream outage may cause delayed or failed response
- Rate limits or data availability constraints from the underlying Alpha Vantage public API
- Payment failure results in no charge and no data returned

## How this service works

Alpha Vantage global quote for one stock or ETF ticker: price, open/high/low, volume, previous close and change, from Alpha Vantage's free API. Needs a free Alpha Vantage API key (ALPHAVANTAGE_API_KEY); free keys are rate limited.

## Output

Returns public market data for the requested stock or ETF ticker from Alpha Vantage, including price, quote details, and other available financial metrics for that symbol.

## 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"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "symbol"
     ],
     "properties": {
      "symbol": {
       "type": "string",
       "description": "Stock or ETF ticker, e.g. IBM, MSFT"
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/alpha-vantage-public-stock-etf-data-via-sitecheck-d80ab375/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.chainmarket-api.workers.dev](https://www.zero.xyz/host/api.chainmarket-api.workers.dev/llms.txt)