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

Get an API key Try in playground → Contact provider

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.

Kaspa API — live data on the oanor API marketplace

API health

healthy

Uptime: 100.00%; Server probes · 24h
Avg latency: 418 ms; Server probes · 24h
Subscribers: 4,991; active
Total calls: 80; last 7 days

Full status page → · 16 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

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

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

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

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

Built by

PremiumApi

Related APIs

Other APIs with overlapping tags.

Kaspa Hashrate, Supply & Emission API

Kaspa's network economics and BlockDAG state, live from the public Kaspa REST API — no key, nothing cached. Kaspa is the fastest proof-of-work BlockDAG (GHOSTDAG): it confirms many blocks per second in parallel and emits coins on a unique smooth, monthly "chromatic" halving schedule. The existing Kaspa reader covers addresses, UTXOs and transactions; this opens the mining-and-emission layer it does not. Read the live network hashrate (in TH/s) and BlockDAG state — the block and header counts, the number of current DAG tips and the difficulty. Read the coin supply with the circulating and maximum KAS (Kaspa caps near 28.7 billion), the percent of the supply already mined and the current per-block reward. And read the next halving — its timestamp, date and the reward it drops to. The mining-and-economics layer for Kaspa miners, wallets, explorers and analytics. Live from api.kaspa.org.

api.oanor.com/kaspametrics-api

Meter API

Live EVM on-chain data for Meter (chain id 82) — the HotStuff-BFT proof-of-stake Layer-1 whose native gas token is MTR — served directly from public EVM JSON-RPC nodes with multi-node failover. The status endpoint returns the chain and network id, the latest block height and the node client version. The block endpoint returns a block by number (or the latest) with its hash, parent hash, timestamp, transaction count, gas used and gas limit, miner and size. The gas endpoint returns the current gas price in both wei and gwei. The balance endpoint returns the MTR balance and outgoing transaction count for any address, converted from base wei (18 decimals) into whole MTR with exact big-integer scaling. Every figure is read live from the chain over JSON-RPC — nothing bundled or modelled — behind a short server-side cache with keep-warm so the feed stays fast and fresh. Ideal for explorers, wallet and dashboard tooling, gas trackers, address monitors and analytics apps across the Meter ecosystem. Live keyless upstream. 5 endpoints.

api.oanor.com/meter-api

Songbird API

Live EVM on-chain data for Songbird (chain id 19) — the canary network of the Flare blockchain, whose native token is SGB — served directly from public C-chain JSON-RPC nodes with multi-node failover. The status endpoint returns the chain and network id, the latest block height and the node client version. The block endpoint returns a block by number (or the latest) with its hash, parent hash, timestamp, transaction count, gas used and gas limit, miner and size. The gas endpoint returns the current gas price in both wei and gwei. The balance endpoint returns the SGB balance and outgoing transaction count for any address, converted from base wei (18 decimals) into whole SGB with exact big-integer scaling. Every figure is read live from the chain over JSON-RPC — nothing bundled or modelled — behind a short server-side cache with keep-warm so the feed stays fast and fresh. Ideal for explorers, wallet and dashboard tooling, gas trackers, address monitors and analytics apps across the Flare and Songbird ecosystem. Live keyless upstream. 5 endpoints.

api.oanor.com/songbird-api

Sophon Chain API

Real-time on-chain data for Sophon (chain-id 50104), a ZK Layer-2 built on the zkSync Elastic Chain stack and focused on consumer and entertainment apps, where gas is paid in the native SOPH token. The status endpoint returns the chain id, network id, latest block height, native symbol and node client version so you can confirm the chain is live and synced. The block endpoint returns a block by decimal or 0x-hex height — or the latest block when no height is given — with its hash, parent hash, timestamp (raw and ISO), transaction count, gas used and limit, base fee and miner. The gas endpoint returns the current gas price in both wei and gwei at the latest block. The balance endpoint returns the native SOPH balance (in wei and human-readable units) and the transaction count (nonce) for any 0x address. The meta endpoint documents the chain id, decimals and ecosystem. Reads a live Sophon JSON-RPC node directly, so values are current to the latest block. Live, nothing stored. 5 endpoints. This serves native-coin and chain data; for ERC-20 token balances or contract calls use a dedicated token/contract API.

api.oanor.com/sophon-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.

Address 2

Transaction 1

Network 1

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

GET /v1/address

Address balance + tx count

Playground

Parameters

Custom headers

Language: Client:

GET /v1/utxos

Unspent outputs an address holds

Playground

Parameters

Custom headers

Language: Client:

GET /v1/transaction

Transaction with acceptance + outputs

Playground

Parameters

Custom headers

Language: Client:

GET /v1/network

Live blockDAG state, hashrate, supply

Playground

Custom headers

Language: Client:

Code snippets

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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Kaspa API

API health

Pricing

Built by

Related APIs

Kaspa Hashrate, Supply & Emission API

Meter API

Songbird API

Sophon Chain API

Frequently asked questions

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