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Massive x402 API – RSI Indicator
x402
Massive x402 API – RSI Indicator is a paid API for AI agents from agent.massive.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).
Returns the Relative Strength Index (RSI) time series for a given US stock ticker, payable per-request via x402 micropayment with no account or API key required.
Price / call$0.01
Success—
StatusUnknown
How this service works
US stock market data, sold per request over x402. Every path here answers 402 with the payment terms in the PAYMENT-REQUIRED header, and answers with the data once the payment settles. No account, no API key, no subscription.
Output
A JSON object containing an array of RSI values (each with a numeric RSI value and a millisecond timestamp), a reference URL to the underlying aggregate data used for the calculation, a next_url cursor for pagination, and a request_id. Results are ordered by timestamp according to the requested sort order.
Example use cases
Overbought/oversold stock screening
“Pull the 14-day RSI for NVDA using daily close prices — I want the last 20 values in descending order so I can see if it's been overbought recently.”
Intraday RSI momentum check
“Get me the RSI for TSLA on 1-hour candles for the past week, using a 9-period window on close prices, so I can see short-term momentum.”
Historical RSI backtest data
“Fetch up to 500 daily RSI values for SPY using the default 14-period window, adjusted for splits, going back from 2023-12-31, in ascending order so I can backtest a trading strategy.”
Technical details
Endpoint
GEThttps://agent.massive.com/v1/indicators/rsi/%7BstockTicker%7DWhen to prefer
Choose this endpoint when you need RSI technical indicator data for US equities without requiring an account, API key, or subscription — ideal for pay-per-use agent workflows where you only query occasionally. Prefer this over traditional data providers when you want micropayment-based access via x402. It is especially suited for AI agents that need on-demand financial signal retrieval with minimal setup overhead. Use alternatives if you need bulk historical downloads cheaper than $0.01/call or need non-US markets.
Side effects
- Payment not settled or x402 micropayment fails — returns 402 with PAYMENT-REQUIRED header containing payment terms
- Invalid or unsupported ticker symbol — returns error status
- Timestamp range yields no data (e.g. weekend/holiday with no trading activity)
- Window size too large relative to available data — may return empty values array
- limit exceeds maximum of 5000 — validation error
- Invalid timespan or series_type enum value — bad request error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"status": "OK",
"results": {
"values": [
{
"value": 82.19,
"timestamp": 1517562000016
}
],
"underlying": {
"url": "https://api.massive.com/v2/aggs/ticker/AAPL/range/1/day/2003-01-01/2022-07-25"
}
},
"next_url": "https://api.massive.com/v1/indicators/rsi/AAPL?cursor=YWN0aXZlPXRydWUmZGF0ZT0yMDIxLTA0LTI1JmxpbWl0PTEmb3JkZXI9YXNjJnBhZ2VfbWFya2VyPUElN0M5YWRjMjY0ZTgyM2E1ZjBiOGUyNDc5YmZiOGE1YmYwNDVkYzU0YjgwMDcyMWE2YmI1ZjBjMjQwMjU4MjFmNGZiJnNvcnQ9dGlja2Vy",
"request_id": "a47d1beb8c11b6ae897ab76cdbbf35a3"
}
}Tags
x402
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