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Massive x402 API – EMA (Exponential Moving Average)
x402
Massive x402 API – EMA (Exponential Moving Average) 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 exponential moving average (EMA) for a given US stock ticker over a specified time window and timespan, paid per-request via x402 with no account 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
Returns a JSON object containing an array of EMA values each with a numeric EMA value and a millisecond timestamp, the URL of the underlying aggregate data used in the calculation, a pagination cursor (next_url) for retrieving additional results, and a request ID. Status field indicates success or failure.
Example use cases
Daily EMA for momentum trading
“Pull the 50-day exponential moving average for NVDA using daily close prices — I want the last 60 data points sorted from newest to oldest.”
Hourly EMA for intraday analysis
“Get me a 10-period EMA for SPY on an hourly timespan using close prices, split-adjusted, for the last 100 results.”
Weekly EMA trend check for a portfolio
“Fetch the 20-week exponential moving average for MSFT and TSLA using weekly close prices — I need 52 weeks of data for each, most recent first.”
Technical details
Endpoint
GEThttps://agent.massive.com/v1/indicators/ema/%7BstockTicker%7DWhen to prefer
Choose this endpoint when you need EMA technical indicator data for US equities on a pay-per-request basis with no account, API key, or subscription. Ideal for agents that need occasional or bursty access to stock technical indicators without committing to a recurring plan. Prefer over traditional API subscriptions when usage is sporadic or cost-per-call economics are preferred. Use over the SMA endpoint specifically when an exponentially weighted moving average (giving more weight to recent prices) is required.
Side effects
- Payment not settled — 402 response with payment terms header returned instead of data
- Invalid or unrecognized ticker symbol — empty results or error status
- Timestamp filter outside available data range — empty results array
- Window size or limit out of allowed bounds — validation error
- Network timeout during payment settlement — request must be retried
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"status": "OK",
"results": {
"values": [
{
"value": 140.139,
"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/ema/AAPL?cursor=YWN0aXZlPXRydWUmZGF0ZT0yMDIxLTA0LTI1JmxpbWl0PTEmb3JkZXI9YXNjJnBhZ2VfbWFya2VyPUElN0M5YWRjMjY0ZTgyM2E1ZjBiOGUyNDc5YmZiOGE1YmYwNDVkYzU0YjgwMDcyMWE2YmI1ZjBjMjQwMjU4MjFmNGZiJnNvcnQ9dGlja2Vy",
"request_id": "a47d1beb8c11b6ae897ab76cdbbf35a3"
}
}Tags
x402
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