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API · /starknet-api

Starknet API

healthy 4,728 Subscribers

Live on-chain data from Starknet, the Ethereum Layer 2 zk-rollup built on the Cairo VM and STARK proofs, via a public Starknet JSON-RPC node. Starknet has no externally-owned accounts: every account is a smart contract with native account abstraction, and fees are paid in STRK or ETH. Resolve an address's transaction nonce, the account contract class it runs and its STRK and ETH balances, read straight from the fee-token contracts. Get a block's number, hash, status, timestamp, sequencer and transaction count. Look up any transaction with its type, finality and execution status, the address that sent it and the actual fee paid. Read the live chain state — the chain id, the JSON-RPC spec version, the latest block and whether the node is syncing. Live, no key, nothing stored. Distinct from the XRP Ledger, Stellar, TRON, Aptos, Algorand, Tezos, Cardano, Hedera, Kaspa, Cosmos, Sui, NEAR, MultiversX, Solana and EVM on-chain APIs and from price feeds — this is Starknet's Cairo-account state, balances, blocks and transactions. Perfect for wallets, explorers and analytics apps.

#starknet #cairo #blockchain #crypto #on-chain #layer2 #zk-rollup #web3
api.oanor.com/starknet-api
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Machine-readable spec so AI agents can integrate this API.

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

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

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
448 ms
Server probes · 24h
Subscribers
4,728
active
Total calls
4
last 7 days
status Full status page → · 8 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 7,200 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • 7.2k calls/month
  • 2 req/sec
  • Account + block + transaction + network
  • No credit card
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Starter

€14.00 /month

  • 144,000 calls / month
  • 5 requests / second
  • Hard cap (429 above quota, no overage)
  • 144k calls/month
  • 5 req/sec
  • Email support
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Pro

€38.00 /month

  • 875,000 calls / month
  • 15 requests / second
  • Hard cap (429 above quota, no overage)
  • 875k calls/month
  • 15 req/sec
  • Priority support
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Business

€89.00 /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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Chain Stats API

Live blockchain network statistics across 18 chains, from the public Blockchair feed. Get one network's full stats — price, market cap and dominance, block height, 24h transactions, circulating supply, difficulty, hashrate, mempool size and average fee; compare the major chains side by side, ranked by market cap; and read a chain's mempool congestion (pending transactions, size and fees). A multi-chain network-stats layer — distinct from single-coin price feeds and Bitcoin-only on-chain APIs: it answers how each blockchain is performing right now and how they compare. Live, with a 10-minute upstream cache.

api.oanor.com/chainstats-api

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

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for Starknet API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Starknet API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for Starknet 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 Starknet API cost?
Starknet API has a free tier with 100 calls / month. Paid plans start at €14.00 / 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 Starknet API GDPR-compliant?
All requests to Starknet 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/starknet-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/starknet-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/starknet-api/SOME_PATH");
curl_setopt($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/starknet-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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