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CoinCap EMA (Exponential Moving Average)
x402
CoinCap EMA (Exponential Moving Average) is a paid API for AI agents from rest.coincap.io, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-13).
Returns the Exponential Moving Average (EMA) technical indicator for a given cryptocurrency asset slug.
Price / call$0.004
Success—
StatusUnknown
How this service works
CoinCap gives AI agents, apps, and developers real-time cryptocurrency market data. Two ways to access: - **API key** — sign up at https://coincap.io and pass `Authorization: Bearer <key>` or `?apiKey=<key>`. - **Keyless x402** (agents) — the 10 `agentFriendly` endpoints accept per-call USDC payment on Base via the [x402 protocol](https://x402.gitbook.io/x402). No signup needed. See `/.well-known/x402.json` for the machine-readable payment catalog.
Output
Returns EMA (Exponential Moving Average) technical indicator values for the requested cryptocurrency asset, including the computed moving average figure derived from historical price data, enabling trend analysis and trading signal evaluation.
Example use cases
Crypto trading signal dashboard
“Fetch the current EMA for Ethereum so I can check whether it's in an uptrend or downtrend before I decide to enter a position.”
Automated portfolio rebalancing trigger
“Get the EMA for Solana — I want to rebalance my portfolio automatically whenever its price crosses above or below the moving average.”
Crypto market research report
“Pull the EMA data for Cardano from CoinCap so I can include its trend momentum in my weekly crypto market analysis report.”
Technical details
Endpoint
GEThttps://rest.coincap.io/v3/agentFriendly/ta/%7Bslug%7D/emaWhen to prefer
Choose this endpoint when you need EMA-specific technical analysis for a cryptocurrency asset and want a pre-computed, ready-to-use indicator rather than raw price history to calculate yourself. Ideal for trading bots, portfolio monitors, or market research tools that rely on EMA crossover signals. Prefer it over general price endpoints when trend-smoothing analysis is required. It supports keyless per-call USDC payment via x402, making it ideal for agents that can't pre-register API keys.
Side effects
- Invalid or unrecognized asset slug returns an error or empty result
- Payment failure via x402 protocol blocks access without a valid API key fallback
- Network timeout on the REST endpoint
- Missing required 'slug' parameter causes a 400 Bad Request
- Stale or insufficient historical data for a very new or illiquid asset may produce unreliable EMA values
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| slugrequired | string |
Output
Schema · Response
{
"type": "object"
}Tags
x402
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