Best Crypto API for Vibe Coding
Tell Claude Code, Codex, Cursor or Lovable to use Coinranking API, and it does: live prices for 2.3M+ coins, plain JSON, one key.
Free plan, no card · works with every model below
One Prompt, a Live Price Table
Copy it into any agent below. Swap the table for whatever you are building.
Build me a live crypto price table with Coinranking API. - Docs: https://coinranking.com/api/documentation (use the "Copy for AI" button on any endpoint page) - Auth: send my key in the x-access-token header - Load the top 50 coins from GET https://api.coinranking.com/v2/coins?limit=50 - Keep prices live over Server-Sent Events from https://api.coinranking.com/v2/real-time/sse/rates?currency-uuids[]=... using the UUIDs from that list (use wss://api.coinranking.com/v2/real-time/rates instead if this runs on a back end) - Show name, icon (iconUrl), price, 24h change and market cap; flash the price cell on each update - Read fields that start with a digit, like 24hVolume, with bracket notation - Keep the API key server-side; proxy the stream to the browser through my own route
The Coding Agents Developers Use
Share of professional developers using each tool at work, JetBrains survey, May–July 2026.
Source: JetBrains, AI Coding Agents: Adoption Trends, August 2026.
App Builders That Ship without an IDE
For founders and designers: describe the app, get a deployed one.
Why Agents Get Coinranking API Right
Three things that make generated code work on the first run.
Copy for AI on Every Docs Page
One button gives the agent the endpoint as clean text. Point it at the docs and let it read.
One Key, Plain JSON
An x-access-token header and predictable camelCase fields. Agents get it right first time.
WebSockets Reworked for Agents
The streaming feeds were revised in February 2026 so generated clients connect without hand-fixing.
What People Build in an Afternoon
Each one is a prompt and a key.
Portfolio Tracker
Holdings revalued on every tick, over SSE or a WebSocket.
Market Heatmap
One /coins call, colour by 24-hour change.
Price Widget
A live price for any coin, embedded anywhere.
Trading Bot
Signals from the indicators endpoints, execution elsewhere.
Price Alerts
Fire when a price crosses, from the rates stream.
Crypto Dashboard
Global stats, top coins and a chart from three calls.
The streaming half of those builds is on the WebSocket API page and in the WebSocket docs.
Vibe Coding Questions
Any of them. Claude Code, GitHub Copilot, Codex and Cursor, the four agents developers report using most in the JetBrains May–July 2026 survey, all integrate Coinranking API from its documentation, and app builders such as Lovable, Bolt, v0 and Replit generate a working front end from a single prompt. The API is plain HTTPS and JSON with one header for auth, which is what these tools handle best.
No. Paste the prompt on this page, or give the agent the documentation URL and let it use the Copy for AI button on each endpoint page. Every Coinranking endpoint is documented with parameters, response fields and examples in curl, JavaScript, PHP and Python, which is exactly what a coding agent reads to write a correct client.
Yes. Coinranking API's Free plan gives 5,000 calls a month, one key and prices for every coin, with no card. That covers a prototype. Real-time streaming over WebSockets or SSE is on the Professional plan at $199 a month, which starts with a 30-day free trial. See pricing.
Tell the agent to keep the key server-side: call Coinranking API from a server route and relay the WebSocket or SSE stream to the browser through your own endpoint. Every plan supports CORS, so direct browser calls work for a demo, but a key in a browser bundle is visible to anyone who opens the page. Professional includes unlimited keys, so give each environment its own.
Get a Key, Paste the Prompt
A free key today; Professional free for 30 days when you need the socket.