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API · /superposition-api

Superposition API

healthy 3,825 Subscribers

Live EVM on-chain data for Superposition (chain id 55244) — an Arbitrum-Orbit DeFi Layer-3 with ETH gas and on-chain yield-bearing Super Assets — served directly from the public Superposition JSON-RPC with server-side resilience. 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 ETH balance and outgoing transaction count for any address, converted from base wei (18 decimals) into whole ETH 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 DeFi analytics across the Superposition and Arbitrum-Orbit ecosystem. Live keyless upstream. 5 endpoints.

#superposition #arbitrum-orbit #evm #layer3 #defi #crypto #rpc
api.oanor.com/superposition-api
Get an API key Try in playground → Contact provider

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

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

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

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
175 ms
Server probes · 24h
Subscribers
3,825
active
Total calls
5
last 7 days
status Full status page → · 10 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 340 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • 340 calls/month
  • 2 req/sec
  • Status + block + gas
  • No credit card
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Starter

€12.20 /month

  • 15,400 calls / month
  • 8 requests / second
  • Hard cap (429 above quota, no overage)
  • 15,400 calls/month
  • 8 req/sec
  • Address balances + tx count
  • Email support
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Pro

€34.70 /month

  • 80,000 calls / month
  • 16 requests / second
  • Hard cap (429 above quota, no overage)
  • 80,000 calls/month
  • 16 req/sec
  • Explorer & DeFi pipelines
  • Priority support
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Mega

€84.10 /month

  • 328,000 calls / month
  • 40 requests / second
  • Hard cap (429 above quota, no overage)
  • 328,000 calls/month
  • 40 req/sec
  • Platform scale
  • Dedicated SLA
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Built by

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Related APIs

Other APIs with overlapping tags.

Gravity API

Real-time on-chain data for Gravity (Gravity Alpha Mainnet, chain-id 1625) — the high-performance chain by Galxe built on the Arbitrum Nitro stack, using G as its native gas token. Query live network status (latest block height, network id, client version), fetch any block by height or the latest one (timestamp, transaction count, gas used / limit, base fee, miner), read the current gas price in wei and gwei, and look up the native G balance and transaction count of any address. A keyless, no-account JSON wrapper over the canonical Gravity JSON-RPC node — decoded from hex into plain decimals and human-readable G so you do not have to. Ideal for explorers, wallets, dashboards, gas estimators and analytics on the Gravity chain.

api.oanor.com/gravity-api

RARI Chain API

Live on-chain data for RARI Chain mainnet (an Arbitrum-Orbit NFT-focused Ethereum L3, native ETH) 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 chain data with the rotating proxy as automatic fallback — 9 endpoints. Ideal for wallets, explorers, NFT tooling, portfolio trackers and on-chain monitoring on RARI Chain.

api.oanor.com/rari-api

Perennial API

Live Perennial on-chain data via Blockscout. Perennial is a DeFi derivatives Ethereum L2 built on Arbitrum Orbit; gas and balances are in ETH. Network stats, gas prices, latest blocks, a block by height or hash, address detail with ETH balance, a transaction by hash, ERC-20 token metadata and a universal search across addresses, tokens, blocks and transactions. Real data, no key.

api.oanor.com/perennial-api

Degen Chain API

Live Degen Chain on-chain data via Blockscout. Degen Chain is a Farcaster-community L3 built on Arbitrum Orbit; gas and balances are in DEGEN. Network stats, gas prices, latest blocks, a block by height or hash, address detail with DEGEN balance, a transaction by hash, ERC-20 token metadata and a universal search across addresses, tokens, blocks and transactions. Real data, no key.

api.oanor.com/degen-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for Superposition API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Superposition API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for Superposition 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 Superposition API cost?
Superposition API has a free tier with 100 calls / month. Paid plans start at €12.20 / 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 Superposition API GDPR-compliant?
All requests to Superposition 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/superposition-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/superposition-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/superposition-api/SOME_PATH");
curl_setopt($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/superposition-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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