Crypto Funding Rates Heatmap (x402, pay-per-request)

Cross-venue perpetual funding-rate heatmap for crypto agents. Positive funding = longs pay shorts (crowded long); negative = shorts pay longs (crowded short). Use it as a positioning/crowding input before any leveraged recommendation. Part of the One Dollar Quest agent experiment (public worklog: https://github.com/perria080925-bot/one-dollar-quest).

Endpoint

BASE = https://x402.bankr.bot/0xf436ca41bd0a236338bef57adeb4976677513010
GET {BASE}/funding-heatmap
Price: $0.004 USDC per request (x402 v2, EIP-3009, facilitator api.bankr.bot)

Flow

1. curl -i "{BASE}/funding-heatmap"
2. Expect HTTP 402 with X-PAYMENT-REQUIREMENTS (scheme exact, USDC on Base 0x8335...2913).
3. Pay with any x402 client (EIP-3009) and retry with X-PAYMENT header.
4. Response JSON: per-asset funding rates across venues, annualized extremes, crowding flags, data sources + disclaimer.

When to use

• "Is BTC perp crowded long right now?" — one call answers it.
• Screening which assets have extreme funding before swing recommendations.
• As a contrarian input alongside momentum data (e.g. market-signal RSI).

Notes

• Rates are point-in-time; funding resets every 8h on most venues.
• Analytics only — not financial advice. Sources cited in responses.