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API · /japanopenchain-api

Japan Open Chain API

healthy 4,584 Subscribers

Live on-chain data for Japan Open Chain mainnet (a consortium EVM Layer-1 run by Japanese enterprises, native JOC) via Blockscout — no key. Read network stats (block height, total transactions, gas), a gas oracle in gwei, the most recent blocks and full block detail by height or hash, any address balance and contract info, full transaction detail, ERC-20 token detail by contract, and a universal search across addresses, tokens, blocks and transactions. Real Layer-1 chain data with the rotating proxy as automatic fallback — 9 endpoints. Ideal for wallets, explorers, enterprise and stablecoin tooling, portfolio trackers and on-chain monitoring on Japan Open Chain.

#japan-open-chain #joc #blockchain #web3 #on-chain #layer1 #enterprise #evm #crypto #blockscout
api.oanor.com/japanopenchain-api
Get an API key Try in playground → Contact provider

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

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

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

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
1000 ms
Server probes · 24h
Subscribers
4,584
active
Total calls
54
last 7 days
status Full status page → · 18 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 4,750 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • 4,750 calls/month
  • 2 req/sec
  • All 9 on-chain endpoints
  • No credit card
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Basic

€8.70 /month

  • 110,500 calls / month
  • 8 requests / second
  • Hard cap (429 above quota, no overage)
  • 110.5k calls/month
  • 8 req/sec
  • Stats, gas, blocks, tx, tokens
  • Email support
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Pro

€26.40 /month

  • 602,000 calls / month
  • 20 requests / second
  • Hard cap (429 above quota, no overage)
  • 602k calls/month
  • 20 req/sec
  • Enterprise & analytics scale
  • Priority support
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Mega

€72.80 /month

  • 2,940,000 calls / month
  • 50 requests / second
  • Hard cap (429 above quota, no overage)
  • 2.94M calls/month
  • 50 req/sec
  • Platform scale
  • Dedicated SLA
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Live on-chain data from the Nervos Common Knowledge Base (CKB) via the official Nervos explorer — clean JSON, no cache. Nervos CKB is a proof-of-work Layer-1 built on the Cell model — a generalised UTXO where every cell can hold state and code — secured by the Eaglesong hash and governed in epochs, with a native state-rent / deposit system (NervosDAO) that pays interest for locking CKB. Read the chain state (tip block, current epoch, block time, difficulty and hashrate); browse the most recent blocks with miner and reward; fetch a single block by number or hash; look up an address's CKB balance, its NervosDAO deposit and compensation, live-cell count and UDT token accounts; or resolve a transaction's block, fee and type. Read live from Nervos, nothing stored. This is Nervos CKB's own Cell-model, NervosDAO and PoW layer — distinct from the Bitcoin, Decred, Ergo and other on-chain APIs and from price feeds.

api.oanor.com/nervos-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for Japan Open Chain API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Japan Open Chain API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for Japan Open Chain 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 Japan Open Chain API cost?
Japan Open Chain API has a free tier with 100 calls / month. Paid plans start at €8.70 / 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 Japan Open Chain API GDPR-compliant?
All requests to Japan Open Chain 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/japanopenchain-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/japanopenchain-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/japanopenchain-api/SOME_PATH");
curl_setopt($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/japanopenchain-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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