{"uid":"cap_Hw2dKONTSg_INszC0mZ6F","slug":"fastapi-online-coin-price-chart-data-7f5bb6c7","name":"fastapi.online — Coin Price Chart Data","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/coin-chart","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"id":{"type":"string"},"days":{"type":"string"}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","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":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_QZnOIpX_eDY9u_-rK7bqA","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Fetches historical price chart data for a cryptocurrency by coin ID and number of days","exampleAgentPrompt":"Can you pull the historical price chart data for Bitcoin (id: bitcoin) over the last 30 days so I can see how it's been trending?","exampleUseCases":[{"title":"Crypto portfolio trend analysis","prompt":"Get me the price history for Ethereum over the last 14 days — I want to see how it's moved recently."},{"title":"Short-term coin price review","prompt":"Pull the coin chart data for Solana for the past 7 days so I can check if it's been recovering."},{"title":"Long-term price research","prompt":"Fetch the historical price data for Chainlink over the last 90 days — I'm trying to understand its longer-term trend."}],"resultDescription":"Returns historical price chart data for the specified cryptocurrency, likely as a time-series array of price points (dates and prices) covering the requested number of days, suitable for charting or analysis.","failureModes":["Invalid or unknown coin ID returns an error or empty result","Non-numeric or invalid 'days' value causes a bad request error","Network or upstream data source outage returns a server error","Missing required parameters may return a validation error"],"whenToPreferThis":"Use this endpoint when you need historical cryptocurrency price data for a specific coin over a defined time window, especially in a pay-per-call, no-signup context using crypto payments. Prefer this over CoinGecko or CoinMarketCap direct APIs when API key registration is not desired or when integrating into an x402 payment flow.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T07:03:03.703Z","isFirstParty":false}