BlockchainLive

Watchers Fear Greed

WATCHER: get a signed callback when the Crypto Fear & Greed index crosses a level (e.g.

$0.0575USDC per call · settled on Base · no subscription, no API key

Overview

WATCHER: get a signed callback when the Crypto Fear & Greed index crosses a level (e.g. drops into Extreme Fear). Arm once, pay once. conditionType 'above'/'below'; threshold is the index value 0–100. Fires once per crossing; bounded by maxFires/expiry. Signed (verify offline) + retried; recoverable via watchers.status. Returns a watcherId.

Endpoint

MethodEndpointPriceDescription
POST/v1/marketplace/api/watchers-fear-greed$0.0575Invoke Watchers Fear Greed (Blockchain) and return the upstream response.

How to call it

Requests are paid per call over the x402 protocol. Call the endpoint, receive a 402 Payment Required quote, then repeat the request with the signed payment header. The SDKs do both steps for you.

# 1. Ask for a quote
curl -i -X POST https://api.jarvisclaw.ai/v1/marketplace/api/watchers-fear-greed \
  -H 'Content-Type: application/json' \
  -d '{}'

# 2. Pay it (the SDK signs and retries for you)
curl -X POST https://api.jarvisclaw.ai/v1/marketplace/api/watchers-fear-greed \
  -H 'Content-Type: application/json' \
  -H 'X-PAYMENT: <signed-payload>' \
  -d '{}'
Open in the marketplace

Docs: Getting started · x402 payments · x402 discovery · All APIs