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API · /numbers-api

Numbers Protocol Chain API

healthy 4,538 Subscribers

Live on-chain data for the Numbers Protocol mainnet (Num Network, the EVM Layer-1 for media provenance and digital-content authenticity, native NUM) 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 Layer-1 chain data with the rotating proxy as automatic fallback — 9 endpoints. Ideal for wallets, explorers, provenance/asset tooling, portfolio trackers and on-chain monitoring on Numbers.

#numbers #num-protocol #blockchain #web3 #on-chain #layer1 #provenance #evm #crypto #blockscout
api.oanor.com/numbers-api
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Machine-readable spec so AI agents can integrate this API.

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

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

Numbers Protocol Chain API — live data on the oanor API marketplace

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
760 ms
Server probes · 24h
Subscribers
4,538
active
Total calls
171
last 7 days
status Full status page → · 27 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 4,350 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • 4,350 calls/month
  • 2 req/sec
  • All 9 on-chain endpoints
  • No credit card
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Basic

€7.70 /month

  • 106,000 calls / month
  • 8 requests / second
  • Hard cap (429 above quota, no overage)
  • 106k calls/month
  • 8 req/sec
  • Stats, gas, blocks, tx, tokens
  • Email support
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Pro

€25.40 /month

  • 585,000 calls / month
  • 20 requests / second
  • Hard cap (429 above quota, no overage)
  • 585k calls/month
  • 20 req/sec
  • Provenance & analytics scale
  • Priority support
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Mega

€70.50 /month

  • 2,870,000 calls / month
  • 50 requests / second
  • Hard cap (429 above quota, no overage)
  • 2.87M calls/month
  • 50 req/sec
  • Platform scale
  • Dedicated SLA
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Roman Numeral API

Roman numeral conversion as an API, computed locally and deterministically. The encode endpoint turns an integer from 1 to 3999 into its Roman numeral using standard subtractive notation, so 1994 becomes MCMXCIV and 2024 becomes MMXXIV. The decode endpoint turns a Roman numeral back into an integer with strict validation — it rejects malformed forms such as IIII or VV and also returns the canonical way to write the same value, accepting any letter case. The arithmetic endpoint adds, subtracts or multiplies two values given as either integers or Roman numerals and returns the result as a Roman numeral and as an integer, provided the result stays within the classic 1–3999 range. The standard subtractive pairs are IV, IX, XL, XC, CD and CM. Everything is computed locally and deterministically, so it is instant and private. Ideal for typesetting, publishing, education, clock-face, game and document-processing app developers, numbering and chapter tools, and history teaching. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is Roman numeral conversion; for binary, octal and hexadecimal number-base conversion use a base-conversion API.

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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.

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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

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for Numbers Protocol Chain API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Numbers Protocol Chain API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for Numbers Protocol Chain 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 Numbers Protocol Chain API cost?
Numbers Protocol Chain API has a free tier with 100 calls / month. Paid plans start at €7.70 / 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 Numbers Protocol Chain API GDPR-compliant?
All requests to Numbers Protocol Chain 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/numbers-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/numbers-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/numbers-api/SOME_PATH");
curl_setopt($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/numbers-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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