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Crypto Market Sentiment API
x402
Crypto Market Sentiment API is a paid API for AI agents from api.x-402.online, paid per call via x402, $0.003/call, status down (last checked 2026-09-07).
Returns a real-time macro crypto market snapshot including the Fear & Greed index, total market cap, 24h volume, BTC & ETH dominance, and 24h market-cap change in a single no-parameter call.
Price / call$0.003
Success—
StatusDown
Output
A JSON object containing: the Fear & Greed index as a numeric score (0–100) and a human-readable label (e.g. 'Extreme Fear', 'Greed'), total crypto market capitalization, total 24-hour trading volume, Bitcoin dominance percentage, Ethereum dominance percentage, and the 24-hour change in total market cap.
Example use cases
Pre-trade macro sentiment check
“Before executing any buy or sell orders, check the current Fear & Greed index and total crypto market cap so I know whether the market is in fear or greed mode right now.”
Daily crypto market briefing
“Give me a quick morning briefing on the crypto market — Fear and Greed score, total market cap, Bitcoin and Ethereum dominance, and how much the market cap has moved in the last 24 hours.”
Algorithmic trading signal gate
“My trading bot needs a macro filter — fetch the current crypto Fear & Greed index and BTC dominance so it can decide whether conditions are favorable before executing the strategy today.”
Technical details
Endpoint
POSThttps://api.x-402.online/v1/crypto/sentimentWhen to prefer
Choose this endpoint when you need a single no-parameter call that delivers a comprehensive macro crypto market snapshot — especially the Fear & Greed index alongside dominance and volume data — without constructing complex queries or authenticating with multiple data providers. Ideal for trading agents that need a lightweight sentiment gate before executing strategies.
Side effects
- Upstream data provider outage may return stale or empty data
- Network timeout if the aggregation service is slow
- HTTP 402 if payment is not attached or USDC balance is insufficient
- Occasional lag in index updates during periods of extreme market volatility
Tags
x402
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