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aggregated ETH/USD open interest data across 5 exchanges as a cryptographically signed (Ed25519) attestation","exampleAgentPrompt":"Can you pull the current ETH/USD open interest aggregated across exchanges — I need the signed attestation so I can verify it on-chain?","exampleUseCases":null,"resultDescription":"Returns a signed data payload containing the aggregated ETH/USD open interest across 5 exchanges, with an Ed25519 cryptographic attestation that allows downstream smart contracts or verifiers to confirm the data's authenticity and origin.","failureModes":["Exchange data unavailable — one or more upstream exchanges unreachable, partial or failed aggregation","Stale data — oracle data is behind real-time due to upstream latency","Payment failure — x402 micropayment not processed, 402 response returned","Invalid signature — Ed25519 signature cannot be verified by consumer","Rate limit exceeded — too many requests from the same client","Service unavailable — oracle infrastructure down, 503 response"],"whenToPreferThis":"Use this endpoint when you need cryptographically verifiable ETH/USD open interest data aggregated across multiple exchanges — particularly for DeFi protocols, smart contracts, or on-chain applications that require tamper-evident oracle attestations. Prefer this over single-exchange OI feeds when multi-exchange coverage and Ed25519 signed provenance are required.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T18:39:44.642Z","isFirstParty":false}