{"uid":"cap_4z2xMu6-g7JwW_B29vine","slug":"fastapi-online-currency-exchange-rate-lookup-f517c613","name":"fastapi.online — Currency Exchange Rate Lookup","description":"Chat, embeddings, OCR, speech-to-text, image editing, image understanding (captioning/Q&A), text-to-speech, translation, writing tools, classification tools, developer tools, local utilities, format/checksum validators, encoding & crypto utilities, date/time calculators, geo/coordinate math, math & finance calculators, novelty tools, and business/social writing generators — 179 endpoints in all, across multiple specialized self-hosted models. Pay per call with crypto — no signup — or get an API key.","url":"https://api.fastapi.online/exchanges?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method","bodyType","body"],"properties":{"body":{"type":"object","required":[],"properties":{}},"type":{"type":"string","const":"http"},"method":{"enum":["POST"],"type":"string"},"bodyType":{"enum":["json","form-data","text"],"type":"string"}},"additionalProperties":false}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","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":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.001/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_w7Lu0w7oNuQzFt0SYRGdA","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":"Retrieves currency exchange rates or performs currency conversion calculations via a self-hosted inference endpoint","exampleAgentPrompt":"What's the current exchange rate from USD to EUR, and how much would 250 US dollars convert to in euros?","exampleUseCases":[{"title":"Travel budget currency conversion","prompt":"I'm heading to Japan next month — can you tell me the current USD to JPY exchange rate and convert $1,500 for me so I know what to expect?"},{"title":"Business invoice foreign currency check","prompt":"I need to pay a supplier 3,000 euros — what's the current EUR to USD exchange rate so I can figure out how much that'll cost me in dollars?"},{"title":"Forex rate monitoring for trading","prompt":"What's the live exchange rate between GBP and CHF right now? I'm tracking this pair for a potential trade."}],"resultDescription":"Returns the current exchange rate between the specified currency pair and optionally the converted amount for a given input value. Response includes rate data sourced from self-hosted models, returned as JSON.","failureModes":["Invalid or unsupported currency code returns an error response","Missing required body fields results in 422 validation error","Payment not included or insufficient USDC triggers 402 Payment Required","Unsupported currency pair may return empty or null rate data","Transient self-hosted model downtime may cause 500 errors"],"whenToPreferThis":"Choose this endpoint when you need a pay-per-call, no-signup currency exchange rate lookup that accepts crypto micropayments via x402 protocol. Useful for agents that need occasional FX lookups without committing to a subscription API key, or when operating in a crypto-native payment context.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-12T12:49:48.162Z","isFirstParty":false,"canonicalSlug":"fastapi-online-currency-exchange-rate-lookup-f517c613"}