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API · /kaspa-api

Kaspa API

healthy 4,991 Subscribers

Live on-chain data from Kaspa (KAS), the fastest proof-of-work Layer 1, via the public api.kaspa.org indexer. Kaspa is not a linear blockchain but a blockDAG running the GHOSTDAG protocol, mined with kHeavyHash at one-or-more blocks per second, so its native state is the UTXO and its native measure of progress is the DAA score. Resolve any address's KAS balance and lifetime transaction count. Pull the unspent outputs an address holds, each with its amount, the transaction that created it, its DAA score and whether it is a coinbase. Read the live blockDAG state — block and header counts, the virtual DAA score, the difficulty, the tip count and pruning point — plus the network hashrate and the circulating-versus-max KAS supply with the share already mined. Look up any transaction with its acceptance status, accepting-block blue score, mass and outputs. Live, no key, nothing stored. Distinct from the XRP Ledger, Stellar, TRON, Aptos, Algorand, Tezos, Cardano, Hedera, Solana and EVM on-chain APIs and from price feeds — this is Kaspa's blockDAG state, UTXO holdings, address balances and transactions. Perfect for wallets, explorers, mining and analytics apps.

#kaspa #kas #blockchain #crypto #on-chain #blockdag #proof-of-work #web3
api.oanor.com/kaspa-api
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Machine-readable spec so AI agents can integrate this API.

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

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

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
750 ms
Server probes · 24h
Subscribers
4,991
active
Total calls
12
last 7 days
status Full status page → · 16 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 6,500 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • 6.5k calls/month
  • 2 req/sec
  • Address + utxos + transaction + network
  • No credit card
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Starter

€13.00 /month

  • 140,000 calls / month
  • 5 requests / second
  • Hard cap (429 above quota, no overage)
  • 140k calls/month
  • 5 req/sec
  • Email support
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Pro

€38.00 /month

  • 870,000 calls / month
  • 15 requests / second
  • Hard cap (429 above quota, no overage)
  • 870k calls/month
  • 15 req/sec
  • Priority support
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Business

€88.00 /month

  • 4,600,000 calls / month
  • 40 requests / second
  • Hard cap (429 above quota, no overage)
  • 4.6M calls/month
  • 40 req/sec
  • Dedicated SLA
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Related APIs

Other APIs with overlapping tags.

Dash On-Chain API

Live on-chain data from the Dash (DASH) blockchain — a payments-focused cryptocurrency — via the public Dash Insight explorer, clean JSON and no cache. Dash uses X11 proof-of-work plus a second tier of collateralised masternodes that power InstantSend (near-instant locked payments) and ChainLocks, and an on-chain treasury that funds proposals. Read the chain state (block height, difficulty, peer connections, protocol version and relay fee); fetch a block by height or hash; look up an address's DASH balance, total received and sent and transaction count; or resolve a transaction's block, value, fee, input/output counts and its InstantSend lock status. Read live from Dash, nothing stored. This is Dash's own X11, masternode-tier and InstantSend ledger — distinct from the Bitcoin, Decred, Ergo, Nervos and other on-chain APIs and from price feeds.

api.oanor.com/dash-api

Conflux On-Chain API

Live on-chain data from the Conflux (CFX) network — a high-throughput Layer-1 that orders blocks with the Tree-Graph DAG consensus (not a single chain) and runs two spaces: the native Core space (cfx: addresses) and an EVM-compatible eSpace. Served live from a public Conflux Core-space JSON-RPC node as clean JSON. Conflux is distinctive for its storage-collateral model and a built-in proof-of-stake interest rate. Read the chain state (chain id, current epoch, block number, latest-finalized epoch, pending-tx count and the PoS interest rate); the supply (circulating, issued, staked and storage-collateral CFX); a block (the pivot block of an epoch) by epoch number or hash; or a Core-space address's CFX balance and staked balance. Read live from Conflux, nothing cached. This is Conflux's own Tree-Graph, storage-collateral and PoS layer — distinct from the Bitcoin, Decred, Ergo, Nervos and other on-chain APIs and from price feeds.

api.oanor.com/conflux-api

Nervos CKB On-Chain API

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

Ergo On-Chain & Native Token API

Live on-chain data from the Ergo (ERG) blockchain via the public Ergo Platform explorer — clean JSON, no cache. Ergo is a proof-of-work cryptocurrency built on the extended-UTXO (eUTXO) model with first-class native tokens, Sigma-protocol smart contracts and storage rent — a distinctly different design from account-based chains. Read the network head (best block height, mining difficulty, miner reward); browse the most recent blocks with their miner, size, difficulty and reward; fetch a single block by header id; look up any address's confirmed ERG balance and every native token it holds; or resolve a native token's id, name, decimals, emission amount and description. Read live from Ergo, nothing stored. This is Ergo's own extended-UTXO chain, native-token and Autolykos-PoW layer — distinct from the Bitcoin, Decred, EOS, Internet Computer and other on-chain APIs and from price feeds.

api.oanor.com/ergo-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for Kaspa API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Kaspa API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for Kaspa 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 Kaspa API cost?
Kaspa API has a free tier with 100 calls / month. Paid plans start at €13.00 / 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 Kaspa API GDPR-compliant?
All requests to Kaspa 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/kaspa-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/kaspa-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/kaspa-api/SOME_PATH");
curl_setopt($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/kaspa-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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