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API · /walletbalance-api

EVM Wallet Balance API

healthy 3,131 Subscribers

Live native-coin balance for any EVM wallet address across the major chains as an API, read straight from each network's public JSON-RPC node. For any 0x address it returns the native balance (in coin units and in wei), the transaction count (nonce), and whether the address is a smart contract. Check one chain, or fan out across every supported chain at once to see where a wallet holds funds — Ethereum, Polygon, BNB Smart Chain, Arbitrum, Optimism, Base and Avalanche. The wallet-balance and address-lookup layer every wallet app, portfolio tracker and dashboard needs. Live, no key, no cache. Distinct from gas-fee and price APIs — this is on-chain address balances.

#wallet #balance #evm #ethereum #on-chain #address #web3 #crypto
api.oanor.com/walletbalance-api
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Machine-readable spec so AI agents can integrate this API.

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

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

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
1490 ms
Server probes · 24h
Subscribers
3,131
active
Total calls
20
last 7 days
status Full status page → · 8 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 6,000 calls / month
  • 5 requests / second
  • Hard cap (429 above quota, no overage)
  • 6k calls/month
  • 5 req/sec
  • All endpoints
  • No credit card
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Starter

€12.00 /month

  • 80,000 calls / month
  • 15 requests / second
  • Hard cap (429 above quota, no overage)
  • 80k calls/month
  • 15 req/sec
  • Email support
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Pro

€29.00 /month

  • 420,000 calls / month
  • 40 requests / second
  • Hard cap (429 above quota, no overage)
  • 420k calls/month
  • 40 req/sec
  • Priority support
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Desk

€68.00 /month

  • 2,200,000 calls / month
  • 100 requests / second
  • Hard cap (429 above quota, no overage)
  • 2.2M calls/month
  • 100 req/sec
  • Dedicated SLA
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Related APIs

Other APIs with overlapping tags.

Algorand (ALGO) On-Chain API

Live on-chain data from the Algorand blockchain (ALGO), a fast carbon-negative pure-proof-of-stake Layer 1, served straight from the public AlgoNode indexer and algod APIs — no key, nothing cached. The account endpoint returns any address's state: its ALGO balance, participation status (online/offline for staking), pending rewards, the Algorand Standard Assets (ASAs) it holds with their amounts, and how many apps it has created. The asset endpoint returns the on-chain registry entry for any ASA — its name, unit, decimals, total supply, creator and URL, so you can resolve USDC, USDt and thousands of tokens. The transactions endpoint returns the account's most recent transactions with the type, counterparty, amount, fee, round and time. The network endpoint returns the live chain state: the last round, the round time, and the total and online ALGO supply. Everything is read live from AlgoNode, nothing stored. This is the Algorand on-chain layer for any wallet, explorer, payments, DeFi or analytics app. Distinct from the XRP Ledger, Stellar, TRON, Aptos, EVM and Solana on-chain APIs and from price feeds — this is Algorand account state, ASA holdings, asset registry, transactions and ledger health. 4 endpoints, no key on our side.

api.oanor.com/algorand-api

Aptos (APT) On-Chain API

Live on-chain data from the Aptos blockchain (APT), a high-throughput Move-based Layer 1, served straight from the official public Aptos fullnode REST API — no key, nothing cached. The account endpoint returns any address's state: its sequence number, authentication key, APT balance and how many on-chain resources it holds. The balance endpoint returns the balance of APT or any coin or fungible asset for an address, handling both the classic coin standard and the newer fungible-asset standard in one call. The resources endpoint lists the Move resource types an account holds — its coins, stores, staking and module data — the structural view of what lives at an address. The transactions endpoint returns the account's most recent transactions with the version, hash, entry function, success flag, gas used and time. The network endpoint returns the live chain state: chain id, the latest ledger version and block height, the epoch and the ledger timestamp. Everything is read live from the fullnode, nothing stored. This is the Aptos on-chain layer for any wallet, explorer, payments, gaming or analytics app. Distinct from the XRP Ledger, Stellar, TRON, EVM and Solana on-chain APIs and from price feeds — this is Aptos account state, balances, Move resources, transactions and ledger health. 5 endpoints, no key on our side.

api.oanor.com/aptos-api

XRP Ledger (XRPL) API

Live on-chain data from the XRP Ledger (XRPL), the decentralized blockchain behind XRP, served straight from public XRPL nodes by JSON-RPC — no key, nothing cached. The account endpoint returns any address's core state: its XRP balance, transaction sequence, the number of objects it owns, and its account flags and domain — the genesis-era account rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh holds tens of thousands of XRP. The balances endpoint returns the full wallet: the XRP balance plus every issued-currency trustline (token or stablecoin) the account holds, with the issuer, currency and amount, decoding hex currency codes to readable tickers. The transactions endpoint returns the account's most recent ledger activity — payments, DEX offers, trustline changes — each with its hash, type, amount, fee, result and time. The server endpoint returns the state of the ledger itself: the latest validated ledger index and age, the base and per-object XRP reserves, the current fee and the node software version — the network health a wallet or explorer needs. Everything is read live from the XRPL, nothing stored. This is the XRP Ledger on-chain layer for any wallet, explorer, exchange, payments or analytics app. Distinct from EVM and Solana on-chain APIs and from price feeds — this is XRPL account state, token balances, transactions and ledger health. 4 endpoints, no key on our side.

api.oanor.com/xrpl-api

Solana API

Live Solana blockchain data, read straight from a public Solana RPC node — no key, nothing cached. Where EVM chains use 0x addresses, Solana uses base58 keys, and this reads them directly. The balance endpoint returns any wallet's SOL balance (in lamports and SOL) along with the account's program owner, whether it is executable and its rent epoch. The network endpoint returns the live state of the chain: the current epoch and how far through it the cluster is, the absolute slot and block height, the running transactions-per-second, the cumulative transaction count and the node health — Solana runs at thousands of transactions per second. The transactions endpoint returns a wallet's most recent transaction signatures with the slot, block time, success or failure and an explorer link. It reads Solana mainnet live. This is the account-and-network layer every Solana wallet, explorer, dashboard or dapp needs. Live from the chain, nothing stored. Distinct from EVM balance, token and transaction APIs — this is Solana on-chain data. 4 endpoints.

api.oanor.com/solana-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for EVM Wallet Balance API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call EVM Wallet Balance API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for EVM Wallet Balance 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 EVM Wallet Balance API cost?
EVM Wallet Balance API has a free tier with 100 calls / month. Paid plans start at €12.00 / 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 EVM Wallet Balance API GDPR-compliant?
All requests to EVM Wallet Balance 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/walletbalance-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/walletbalance-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/walletbalance-api/SOME_PATH");
curl_setopt($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/walletbalance-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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