API · /coinmarkets-api

Coin Markets API

healthy 3,604 Subscribers

Live "where to trade" data for any crypto coin — no key needed. The markets endpoint returns every spot market for a coin across all exchanges: the exchange, the trading pair, the last price, 24h volume (also converted to USD), the bid/ask spread and CoinGecko's trust score — so you can see where a coin trades, at what price and with what liquidity, ideal for arbitrage and best-execution. The exchanges endpoint aggregates that to per-exchange USD volume and pair counts for the coin. Pass the coin as a CoinGecko id (bitcoin, ethereum, solana); common tickers (BTC, ETH, SOL…) are mapped automatically. Data comes live from the public CoinGecko feed — nothing stored. This is the cross-exchange market view for a single coin, distinct from the single-venue exchange tickers, the whole-market data and the single-coin-profile APIs in the catalogue.

#crypto #markets #exchanges #arbitrage #tickers #liquidity

api.oanor.com/coinmarkets-api

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Machine-readable spec so AI agents can integrate this API.

/api/coinmarkets-api/openapi.json

/api/coinmarkets-api/llms.txt

Discovery: GET /api/index.json lists every API.

API health

healthy

Uptime: 100.00%; Server probes · 24h
Avg latency: 213 ms; Server probes · 24h
Subscribers: 3,604; active
Total calls: 0; last 7 days

Full status page → · 3 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

21,300 calls / month
3 requests / second
Hard cap (429 above quota, no overage)
21.3k calls/month
3 req/sec
All endpoints
No credit card

Starter

€8.95 /month

284,000 calls / month
10 requests / second
Hard cap (429 above quota, no overage)
284k calls/month
10 req/sec
Email support

Growth

€25.25 /month

1,255,000 calls / month
25 requests / second
Hard cap (429 above quota, no overage)
1.255M calls/month
25 req/sec
Priority support

Scale

€59.60 /month

4,410,000 calls / month
50 requests / second
Hard cap (429 above quota, no overage)
4.41M calls/month
50 req/sec
Dedicated SLA

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PremiumApi

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Live crypto scam, phishing and dApp-safety checks for the things a user actually clicks or buys — the consumer-protection layer, powered by the public GoPlus Security data, no key, nothing stored. Before you connect a wallet to a website, sign a transaction or mint an NFT, ask whether it is safe. The phishing endpoint checks whether a URL is a known crypto phishing site. The dapp endpoint returns a decentralized app's audit and trust status — its project name, whether it has been audited, whether GoPlus lists it as a trusted project, and the audit firms and dates. The nft endpoint scans an NFT collection contract for risk — whether it is verified or a fake, open-source or a proxy, whether the owner can mint, burn or move tokens without approval, whether the metadata is frozen, plus its item, holder and 24-hour trading-volume figures. Stop phishing sites, fake NFT collections and unaudited dApps before they cost a user their funds. This is the website / dApp / NFT scam-detection cut — distinct from the token-contract-and-wallet security, the historical-exploit database and the price APIs in the catalogue.

api.oanor.com/scamcheck-api

Options DEX API

Live on-chain crypto options trading volume — the decentralized options market where protocols like Derive, Aevo, Premia, Ithaca and Rysk let users trade calls and puts on-chain, powered by the public DeFiLlama options feed, no key, nothing stored. This is distinct from a centralized options exchange order book: it measures the volume actually flowing through on-chain options venues. The overview endpoint returns the whole on-chain options market's volume over the last 24 hours, 7 days and 30 days plus every protocol ranked by what it trades, measured as notional (contract face value, the default) or premium (what option buyers actually paid). The protocol endpoint returns a single protocol's notional and premium volume side by side across 24h / 7d / 30d / all-time. The chain endpoint returns the options volume and top venues for one blockchain. See which on-chain options venue leads and how DeFi options flow shifts. This is the on-chain options-volume cut of DeFi — distinct from the centralized options-chain, spot-DEX, swap-aggregator, fees and perpetual APIs in the catalogue.

api.oanor.com/optionsdex-api

Ethereum Supply & Burn API

Live Ethereum monetary-policy data — the total ETH supply, how much of it is being created versus destroyed, and the EIP-1559 fee burn that can make ether deflationary (the "ultrasound money" thesis), powered by the public ultrasound.money feed, no key, nothing stored. The supply endpoint returns the current circulating ETH supply and its net change over the last 5 minutes, hour, day, week and month — a negative change means more ETH was burned than issued, i.e. net deflation. The burn endpoint returns the ETH destroyed by the base-fee burn over each window in both ETH and USD, the live burn rate in ETH per minute and the current deflationary streak. The basefee endpoint returns the current base fee per gas, the blob base fee and the ETH price. The leaderboard endpoint ranks the apps and contracts burning the most ETH right now. Track ETH issuance, the burn and whether ether is deflating as live JSON. This is the ETH supply / issuance / burn cut — distinct from the gas-fee, on-chain and price APIs in the catalogue.

api.oanor.com/ethburn-api

Token Security API

Live smart-contract risk and safety analysis for crypto tokens and wallet addresses — the on-chain due-diligence check to run before you buy a token or interact with an address, powered by the public GoPlus Security data, no key, nothing stored. The token endpoint scans an ERC-20-style contract on any supported chain and returns whether it is a honeypot, its buy and sell tax, whether it is mintable or has a hidden or privileged owner who can pause trading or take back ownership, whether it is open-source or a proxy, and its holder and LP-holder counts. The address endpoint screens a wallet address against twenty risk signals — cybercrime, money laundering, phishing, sanctions, stealing attacks, honeypot-related addresses and more — and reports exactly which, if any, are flagged. The chains endpoint lists the 40+ supported blockchains. Catch scam tokens, honeypots and tainted addresses before they cost you. This is the real-time contract-security and risk-screening cut of crypto — distinct from the historical exploit database, the price and the on-chain APIs in the catalogue.

api.oanor.com/tokensecurity-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for Coin Markets API?

Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Coin Markets API with the x-oanor-key header. No credit card needed for the free tier.

What's the rate limit for Coin Markets API?

Free tier allows 1 request per second. Paid plans scale up to 50 requests per second on the Mega tier. Hard limits return HTTP 429 above the quota — no surprise overage charges.

How much does Coin Markets API cost?

Coin Markets API has a free tier with 100 calls / month. Paid plans start at €8.95 / month with higher quotas and faster rate limits.

Can I cancel my subscription anytime?

Yes. Plans are billed monthly and you can cancel anytime from your billing dashboard. No long-term contracts and no cancellation fee.

Is Coin Markets API GDPR-compliant?

All requests to Coin Markets API go through our EU-based gateway. Your upstream API key never leaves our server and no personal data is shared with the upstream provider beyond the request you send.

Markets 1

Exchanges 1

Meta 1

Pick an endpoint from the list on the left to see its details and try it.

GET /v1/markets

All spot markets for a coin across exchanges

Playground

Parameters

Custom headers

Language: Client:

GET /v1/exchanges

Per-exchange volume and pair counts for a coin

Playground

Parameters

Custom headers

Language: Client:

GET /v1/meta

Service metadata

Playground

Custom headers

Language: Client:

Code snippets

curl https://api.oanor.com/coinmarkets-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."

const res = await fetch("https://api.oanor.com/coinmarkets-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();

$ch = curl_init("https://api.oanor.com/coinmarkets-api/SOME_PATH");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
$response = curl_exec($ch);

import requests
r = requests.get(
    "https://api.oanor.com/coinmarkets-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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Coin Markets API

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Pricing

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Related APIs

Crypto Scam Check API

Options DEX API

Ethereum Supply & Burn API

Token Security API

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