{"uid":"cap_u0ROB3qDHBDi-J0f-wkmL","slug":"bitcoin-chain-tip-height-53fa56ea","name":"Bitcoin Chain Tip Height","description":"Current Bitcoin chain tip height (latest block number) for agents syncing height. Cryptographically signed (Ed25519) — every response is independently verifiable via /.well-known/obol-pubkey.","url":"https://obol-x402.fly.dev/v1/btc/tip","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","properties":{}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"down","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_UdaqHd60UjQtZhAmmeq27","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns the current Bitcoin blockchain tip (latest block height), cryptographically signed with Ed25519 for independent verifiability.","exampleAgentPrompt":"What's the current Bitcoin block height right now? I need the latest chain tip with a cryptographic signature so I can verify it independently.","exampleUseCases":null,"resultDescription":"Returns the current Bitcoin blockchain tip block height (latest block number), accompanied by an Ed25519 cryptographic signature that can be independently verified using the public key at /.well-known/obol-pubkey. Enables agents to confirm data authenticity without trusting the server.","failureModes":["Service unavailable / 503 if fly.dev instance is down","Payment required / 402 if x402 payment header is missing or invalid","Stale tip if upstream Bitcoin node is temporarily unsynced","Invalid signature if key rotation occurred and cached pubkey is outdated"],"whenToPreferThis":"Choose this endpoint when you need a lightweight, tamper-evident lookup of the current Bitcoin block height — especially when cryptographic verifiability of the response matters. Prefer over raw node RPC calls when you lack direct node access or need a signed attestation for downstream trust. Best for agents syncing height, triggering block-based workflows, or auditing chain progress.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T14:25:00.272Z","isFirstParty":false}