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a composite BTC/USD perpetual funding rate aggregated across 5 exchanges with OI-weighting, median, predicted rate, and market regime, all Ed25519 signed","exampleAgentPrompt":"What's the current BTC/USD perpetual funding rate composite right now — give me the OI-weighted rate, median, predicted rate, and what market regime we're in, with a signed attestation I can verify?","exampleUseCases":null,"resultDescription":"Returns a composite BTC/USD funding rate object including: OI-weighted funding rate across 5 exchanges, median funding rate, predicted next funding rate, current market regime classification, and an Ed25519 cryptographic signature attesting to the data's authenticity and provenance.","failureModes":["Payment not received or invalid x402 payment header — returns 402 Payment Required","Exchange data unavailable for one or more sources — may return partial composite or error","Rate limit exceeded — returns 429","Ed25519 signing failure — returns 500 internal error","Stale data if upstream exchange feeds lag — timestamp in response indicates freshness"],"whenToPreferThis":"Choose this endpoint when you need a cryptographically attested, multi-exchange composite BTC/USD funding rate rather than a single-exchange feed. The OI-weighted aggregation reduces noise from low-liquidity venues, and the Ed25519 attestation makes the data verifiable on-chain or in trust-minimized systems. Ideal for DeFi protocols, trading bots, or risk systems that require tamper-evident funding rate data with a predicted rate and regime signal.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T00:44:28.772Z","isFirstParty":false}