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fastapi.online — Coin Price Chart Data
x402
fastapi.online — Coin Price Chart Data is a paid API for AI agents from api.fastapi.online, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-15).
Fetches historical price chart data for a cryptocurrency by coin ID and number of days
Price / call$0.002
Success—
StatusUnknown
How this service works
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.
Output
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.
Example use cases
Crypto portfolio trend analysis
“Get me the price history for Ethereum over the last 14 days — I want to see how it's moved recently.”
Short-term coin price review
“Pull the coin chart data for Solana for the past 7 days so I can check if it's been recovering.”
Long-term price research
“Fetch the historical price data for Chainlink over the last 90 days — I'm trying to understand its longer-term trend.”
Technical details
Endpoint
POSThttps://api.fastapi.online/coin-chartWhen to prefer
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.
Side effects
- 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| id | string | |
| days | string |
Tags
x402
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