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API · /mempool-api

Bitcoin Mempool API

healthy 3,937 Subscribers

Live Bitcoin on-chain and mempool data as an API, built on the open mempool.space dataset — a different layer from market-price feeds. Get recommended transaction fees (sat/vB) for fast, half-hour, hour and economy confirmation, the current mempool state with its fee histogram, the most recent blocks and full block detail by height or hash (size, weight, transaction count, mining pool, reward and fees). Look up any Bitcoin address for its confirmed and unconfirmed balance and transaction counts, or any transaction by id for its inputs, outputs, fee and confirmation status. Track the difficulty-adjustment countdown, mining-pool hashrate share, the network hashrate over time and the current BTC price. Real on-chain data, no key needed upstream. Ideal for wallets, block explorers, fee estimators, mining dashboards and crypto analytics.

#bitcoin #blockchain #mempool #crypto #on-chain #fees
api.oanor.com/mempool-api
Get an API key Try in playground → Contact provider

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

/api/mempool-api/openapi.json
/api/mempool-api/llms.txt

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

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
218 ms
Server probes · 24h
Subscribers
3,937
active
Total calls
11
last 7 days
status Full status page → · 22 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 7,000 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • 7,000 calls/month
  • 2 req/sec
  • Fees + blocks + price
  • No credit card
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Starter

€6.00 /month

  • 100,000 calls / month
  • 8 requests / second
  • Hard cap (429 above quota, no overage)
  • 100k calls/month
  • 8 req/sec
  • Address + tx lookup
  • Email support
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Pro

€22.00 /month

  • 550,000 calls / month
  • 25 requests / second
  • Hard cap (429 above quota, no overage)
  • 550k calls/month
  • 25 req/sec
  • Wallets / explorers
  • Priority support
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Mega

€75.00 /month

  • 2,800,000 calls / month
  • 50 requests / second
  • Hard cap (429 above quota, no overage)
  • 2.8M calls/month
  • 50 req/sec
  • Mining / analytics platform
  • Dedicated SLA
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Built by

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api.oanor.com/bitfinity-api

GOAT Network API

Live GOAT Network on-chain data via Blockscout. GOAT Network is a Bitcoin-staking Layer 2; gas and balances are in BTC. Network stats, gas prices, latest blocks, a block by height or hash, address detail with BTC balance, a transaction by hash, ERC-20 token metadata and a universal search across addresses, tokens, blocks and transactions. Real data, no key.

api.oanor.com/goat-api

Hemi API

Live Hemi on-chain data via Blockscout. Hemi is a modular Layer 2 supernetwork powered by both Bitcoin and Ethereum; gas and balances are in ETH. Network stats, gas prices, latest blocks, a block by height or hash, address detail with ETH balance, a transaction by hash, ERC-20 token metadata and a universal search across addresses, tokens, blocks and transactions. Real data, no key.

api.oanor.com/hemi-api

Corn API

Live Corn on-chain data via Blockscout. Corn (Maizenet) is a Bitcoin-backed Ethereum L2; gas and balances are in BTCN. Network stats, gas prices, latest blocks, a block by height or hash, address detail with BTCN balance, a transaction by hash, ERC-20 token metadata and a universal search across addresses, tokens, blocks and transactions. Real data, no key.

api.oanor.com/corn-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for Bitcoin Mempool API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Bitcoin Mempool API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for Bitcoin Mempool 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 Bitcoin Mempool API cost?
Bitcoin Mempool API has a free tier with 100 calls / month. Paid plans start at €6.00 / 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 Bitcoin Mempool API GDPR-compliant?
All requests to Bitcoin Mempool 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/mempool-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/mempool-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/mempool-api/SOME_PATH");
curl_setopt($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/mempool-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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