WorldCoinIndex

Overview

WorldCoinIndex provides cryptocurrency prices and rankings via a key-based API. The ticker endpoint requires both fiat and label parameters (verified — the API answers parameter errors step by step).

Quick Start

Ticker (replace YOUR_KEY):

curl "https://www.worldcoinindex.com/apiservice/ticker?key=YOUR_KEY&fiat=usd&label=btc"

{
  "success": true,
  "markets": [
    { "label": "BTC", "price": 77090.5, "volume_24h": 123456789, "percent_change_24h": 1.2 }
  ]
}

Authentication

• Register at worldcoinindex.com → free API key (emailed).
• Send it as the key query parameter.
• Parameters: fiat (usd/eur/…) and label (btc/eth/…) are required — missing ones return {"error": "missing parameter ..."} (verified).

Rate Limits & Notes

• Free tier: modest request limits (check the site); paid tiers scale.
• The API returns markets with label, price, volume_24h, and percent_change_24h.
• The ticker endpoint is the core one — docs describe a few variants (e.g. getmarkets).

FAQ

Is WorldCoinIndex free? Free tier with request limits; more is paid.

How do I get a key? Register at worldcoinindex.com — the key is emailed.

Why “missing parameter”? The ticker needs both fiat and label (verified).