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HERGERT SYNTHORA Fear & Greed Index
x402
HERGERT SYNTHORA Fear & Greed Index is a paid API for AI agents from api.hergertsynthora.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).
Returns the current crypto Fear & Greed Index from alternative.me, including today's value, the delta versus yesterday, and a band-crossing signal.
Price / call$0.05
Success—
StatusUnknown
How this service works
SYNTHORA fear-greed: indice de miedo/codicia con la VARIACION frente a ayer y el cruce de banda, no solo el valor. Fuente: alternative.me, fechada y con hash.
Output
A JSON object with ok:true, the niche identifier 'fear_greed', a result object containing the current Fear & Greed index value, the day-over-day change delta, a band-crossing indicator, a timestamp, and a data hash for verification, plus a payment receipt object confirming the x402 microtransaction.
Example use cases
Daily crypto sentiment check
“Pull today's Fear & Greed Index for me and tell me whether it went up or down from yesterday and if it crossed into a new sentiment band.”
Trading signal pre-check
“Before I place my BTC order, can you grab the latest Fear & Greed reading from SYNTHORA and flag if the index just crossed a band — I want the delta vs yesterday too.”
Verifiable sentiment audit log
“Get me a dated, hash-verified Fear & Greed Index snapshot from SYNTHORA for my records — I need the current value, yesterday's change, and the band-crossing status.”
Technical details
Endpoint
POSThttps://api.hergertsynthora.com/v1/fear-greedWhen to prefer
Choose this endpoint when you need a verifiable, dated, and hash-stamped Fear & Greed Index reading that includes not just the raw value but also the day-over-day delta and a band-crossing signal — useful for trading agents needing auditable sentiment data rather than a bare index number from a generic source.
Side effects
- Upstream alternative.me data unavailable — result may be stale or empty
- Malformed input string causes request rejection
- Payment not processed — x402 receipt missing, request not fulfilled
- Rate limit or infrastructure downtime returning 5xx errors
- Data hash mismatch indicating data integrity issue
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | string | SYNTHORA fear-greed: indice de miedo/codicia con la VARIACION frente a ayer y el cruce de banda, no solo el valor. Fuente: alternative.me, fechada y con hash. |
Tags
x402
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