{"uid":"cap_8wrI6dW3A-DB6poqIxWNg","slug":"api-usenami-io-2fe68dad","name":"Nami Open Interest per Venue and Ticker","description":"Open interest per venue for one crypto perpetual, with mark_price alongside — positioning and crowding across tracked CEX and DEX perp venues. Raw value: units vary per venue, see units_note in the response.","url":"https://api.usenami.io/v1/perp/open-interest","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"},"method":{"type":"string"}}}}},"responseSchema":null,"example":{"request":{"input":{"type":"perpetual","method":"GET"},"venue":"binance","ticker":"BTC"},"response":{"venue":"binance","ticker":"BTC","mark_price":63571.4,"units_note":"open_interest values are raw per venue — some report USD-notional (e.g. Variational, EdgeX, KuCoin), others base-currency contracts (e.g. Binance, MEXC). Normalize via mark_price if needed.","updated_at":"2026-06-12T03:05:08.394668Z","open_interest_raw":98141.62}},"exampleRequest":{"input":{"type":"perpetual","method":"GET"},"venue":"binance","ticker":"BTC"},"tags":["x402"],"displayCostAmount":"0.001000","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"settled","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.001000/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_Dj36vR9itMiY3rjYnI03b","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns open interest for a given perpetual ticker broken down by venue, including raw value and mark price with units noted per venue.","exampleAgentPrompt":"What's the current open interest for BTC perp across all venues, including the mark price and units for each exchange?","exampleUseCases":null,"resultDescription":"A breakdown of open interest per trading venue for the requested ticker, including the raw open interest value, mark price at time of query, and a units_note field clarifying the denomination used by each venue.","failureModes":["Unknown ticker symbol returns empty or 404 response","Venue not supported for the requested symbol returns missing data","Malformed input type/method fields cause validation error","Payment not fulfilled (x402) returns 402 Payment Required","Rate limit exceeded returns 429 Too Many Requests"],"whenToPreferThis":"Use this endpoint when you need a cross-venue snapshot of open interest for a specific perpetual ticker, especially when you need per-venue granularity and the associated mark price. Prefer this over funding rate or spread endpoints when the primary question is about aggregate market positioning or size at a given venue.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T12:43:18.408Z","isFirstParty":false}