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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
231 ms
Server probes · 24h
Subscribers
3,604
active
Total calls
3
last 7 days
status Full status page → · 6 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

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
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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
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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
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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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Related APIs

Other APIs with overlapping tags.

Firi Nordic Exchange API

Live order-book exchange data from Firi, the regulated Norwegian crypto venue and the largest in the Nordics, over its public API — no key, nothing stored. This is the regional venue view for the Norwegian krone (NOK) and Danish krone (DKK) order books: Nordic on-exchange price discovery, distinct from the global-aggregate and the other regional-exchange APIs in the catalogue. The ticker endpoint returns a pair full market summary — last traded price, 24h high/low, the 24h change percent, day volume and the live best bid, best ask and spread. The orderbook endpoint returns the live limit-order book — top bids and asks with cumulative depth and the bid/ask spread — so you can read on-venue liquidity. The trades endpoint returns the most recent executed trades with price, amount, side and time. The markets endpoint lists every NOK and DKK pair the venue trades with its last price and day volume. Coins traded include BTC, ETH, XRP, SOL, ADA, LTC, BNB, DOT and USDC, quoted in NOK and DKK, updated live. Build a pair from coin plus fiat (coin=btc, fiat=nok) or pass it directly (pair=ETHDKK).

api.oanor.com/firi-api

L2BEAT Rollup Risk & TVS API

Live Ethereum layer-2 / rollup risk and value-secured data from L2BEAT — no key, nothing stored. L2BEAT's signature is its independent risk framework: every rollup is rated by maturity Stage (Stage 0 / 1 / 2) and assessed across the canonical risk dimensions — sequencer failure, state validation, data availability, exit window and proposer failure — each carrying a good / warning / bad sentiment and a plain-language explanation. This is the rollup-risk and total-value-secured (TVS) view, distinct from the L2 economics/fundamentals and the on-chain per-chain APIs in the catalogue. The projects endpoint lists every tracked L2 with its type (Optimistic Rollup, ZK Rollup, Validium, layer3…), category, host chain, maturity Stage, TVS and 7-day change. The project endpoint returns one rollup in full — the TVS breakdown (native / canonical / external, and ether / stablecoin / btc / other), the Stage, providers, purposes and the complete risk assessment. The risks endpoint returns just the risk rosette for a rollup with a sentiment tally. The summary endpoint aggregates the whole ecosystem — total TVS, project count and the distribution by Stage and by type. More than a hundred rollups tracked, updated live. Project lookup is by slug (arbitrum, base, optimism, zksync-era, scroll, linea, starknet).

api.oanor.com/l2beat-api

Independent Reserve Exchange API

Live order-book exchange data from Independent Reserve, the regulated Australian / New Zealand crypto venue, over its public API — no key, nothing stored. This is the regional venue view for the AUD, USD, NZD and SGD order books: Australasian and Singapore on-exchange price discovery, distinct from the global-aggregate and the other regional-exchange APIs in the catalogue. The ticker endpoint returns a pair market summary — last traded price, 24h high/low, day volume, the live best bid and offer and the implied spread. The orderbook endpoint returns the live limit-order book — top bids and asks with cumulative depth and the bid/ask spread — so you can read on-venue liquidity. The trades endpoint returns the most recent executed trades. The history endpoint returns the hourly trade-history summary for the last N hours (per-hour open/high/low/close, volume and trade count). The markets endpoint lists every supported coin and the four fiat quote currencies. Forty-one cryptos (BTC, ETH, SOL, XRP and more) quoted against AUD, USD, NZD and SGD, updated live. Currency codes are case-insensitive and BTC is accepted either as btc or its upstream code xbt.

api.oanor.com/independentreserve-api

Token Approval Security API

Live audit of the token approvals (allowances) a crypto wallet has granted, and the risk of the contracts it has approved to spend its tokens — powered by the public GoPlus Security data, no key, nothing stored. Token approvals are the single most common way wallets get drained: once you approve a contract to move a token, a malicious or compromised spender can take it whenever it likes. This is the allowance-hygiene layer — the data behind tools like revoke.cash. The approvals endpoint lists every token a wallet has approved, who it approved (the spender contract), how much was approved and when, and whether that spender is flagged as malicious, trusted or unverified, together with a risk summary counting the dangerous approvals to revoke. The contract endpoint profiles a single spender contract before you approve it — its name, whether it is open-source, its creator, deploy time and risk tags. The chains endpoint lists the 40-plus supported blockchains. Catch wallet-draining allowances before they cost a user everything. This is the approval / allowance-risk cut — distinct from the token-contract-security, scam-detection and on-chain APIs in the catalogue.

api.oanor.com/approvalsecurity-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.

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

Code snippets

Sign up to get an API key, then call any path under your slug.

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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