{"uid":"cap_x7J5RI_Xq6-WYCnHK_rEc","slug":"obol-usdt-usd-spot-price-feed-d884f579","name":"Obol USDT/USD Spot Price Feed","description":"USDT USD spot price stablecoin quote Coinbase Kraken with divergence flag. Single-asset USDT/USD for AI agents. Cryptographically signed (Ed25519) — every response is independently verifiable via /.well-known/obol-pubkey.","url":"https://obol-x402.fly.dev/v1/price/USDT","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_g9a6ocZDNT1B9VBvQwa9E","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 a cryptographically signed USDT/USD spot price quote aggregated from Coinbase and Kraken, including a stablecoin peg divergence flag.","exampleAgentPrompt":"What's the current USDT/USD spot price right now — is Tether holding its peg, or is there any divergence flagged across Coinbase and Kraken?","exampleUseCases":[{"title":"Stablecoin peg monitoring for trading bots","prompt":"Before I execute this large USDT trade, pull the latest signed spot price and let me know if there's any peg divergence showing up between Coinbase and Kraken. I need to know it's safe to proceed."},{"title":"Cryptographic price verification for settlement","prompt":"I need a tamper-proof USDT/USD quote I can verify independently — something I can audit later and prove came from a legitimate source. Can you fetch that for me along with the signature?"},{"title":"Real-time stablecoin health check for agents","prompt":"My agent is about to move capital into USDT but I want it to check the peg first. Give me the current price across both exchanges and flag anything unusual so the agent knows whether to proceed."}],"resultDescription":"Returns the current USDT/USD spot price aggregated from Coinbase and Kraken, a boolean or flag indicating stablecoin peg divergence, a timestamp, and an Ed25519 cryptographic signature that can be independently verified against the public key at /.well-known/obol-pubkey.","failureModes":["Exchange API unavailability causes stale or missing price data","Payment of $0.01 USDC not included or rejected via x402 protocol results in 402 Payment Required","Network timeout to fly.dev host returns 5xx error","Signature verification failure if public key mismatch or response tampered in transit"],"whenToPreferThis":"Use this endpoint when you need a cryptographically verifiable USDT/USD price with peg divergence detection from multiple exchanges (Coinbase + Kraken). Prefer over generic price APIs when auditability and tamper-evidence matter, or when you need to detect stablecoin de-peg events programmatically for an AI agent workflow.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T09:28:51.569Z","isFirstParty":false}