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API · /bip39-api

BIP39 Mnemonic API

healthy 4,450 Subscribers

Work with BIP39 mnemonic seed phrases — the 12-to-24-word recovery phrases used by crypto wallets. Generate a phrase at a chosen strength (128–256 bits) in any of 9 wordlist languages, validate a phrase, convert between a phrase and its raw entropy in both directions, and derive the 512-bit BIP39 seed (with an optional passphrase) used for HD-wallet key derivation. Pure local computation — no key, no third-party service. Note: intended for development, testing and education; generate seeds for real funds offline / client-side, never trust a remote API with production keys. Live, nothing stored. 7 endpoints. Distinct from market-data, password and 2FA tools.

#bip39 #mnemonic #crypto #wallet #seed-phrase #developer-tools
api.oanor.com/bip39-api
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Machine-readable spec so AI agents can integrate this API.

/api/bip39-api/openapi.json
/api/bip39-api/llms.txt

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

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
95 ms
Server probes · 24h
Subscribers
4,450
active
Total calls
154
last 7 days
status Full status page → · 21 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 1,200 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • 1,200 calls/month
  • 2 req/sec
  • 9 languages, 12-24 words
  • No credit card
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Starter

€3.80 /month

  • 13,000 calls / month
  • 8 requests / second
  • Hard cap (429 above quota, no overage)
  • 13k calls/month
  • 8 req/sec
  • Entropy + seed derivation
  • Email support
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Pro

€23.40 /month

  • 152,000 calls / month
  • 20 requests / second
  • Hard cap (429 above quota, no overage)
  • 152k calls/month
  • 20 req/sec
  • Wallet / dev tooling
  • Priority support
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Mega

€59.40 /month

  • 780,000 calls / month
  • 50 requests / second
  • Hard cap (429 above quota, no overage)
  • 780k calls/month
  • 50 req/sec
  • Platform scale
  • Dedicated SLA
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Related APIs

Other APIs with overlapping tags.

Bithumb Exchange API

Live spot market data from Bithumb, South Korea's major crypto exchange, served straight from its public order books — no key on the data, nothing cached, nothing stored. Look up any market for its last price, 24h open/high/low, 24h change and base/quote volume; rank every market for a payment currency (Korean won KRW, or BTC) by 24h turnover; list the tradable coins; or pull live order-book depth with the running spread. Markets are addressed COIN_PAYMENT (BTC_KRW, ETH_BTC). This is the Bithumb venue specifically — a distinct Korean-won price feed, ideal for tracking the "kimchi premium" and KRW price discovery, separate from the USD/USDT-quoted exchange APIs in the catalogue.

api.oanor.com/bithumb-api

Biconomy Exchange API

Live spot market data from Biconomy, a global crypto exchange, served straight from its public order books — no key on the data, nothing cached, nothing stored. Look up any market for its last price, 24h high/low, 24h change and base/quote volume; rank every spot market for a quote currency (USDT, BTC, ETH…) by 24h turnover; list the tradable pairs with their base, quote and precision; or pull live order-book depth with the real best bid/ask and running spread. Markets are addressed as BTC_USDT, with base and quote either side of the underscore. This is the Biconomy venue specifically — a distinct global exchange feed, separate from the other exchange APIs in the catalogue, so cross-venue arbitrage and price-discovery workflows can read each book on its own terms.

api.oanor.com/biconomy-api

Deepcoin Exchange API

Live spot market data from Deepcoin, a global crypto exchange, served straight from its public order books — no key on the data, nothing cached, nothing stored. Look up any market for its last price, best bid/ask and spread, 24h high/low, 24h change and base/quote volume; rank every spot market for a quote currency (USDT, BTC, ETH…) by 24h quote volume; list the tradable instruments with their base, quote and tick/lot size; or pull live order-book depth with the running spread. Markets are addressed OKX-style as BTC-USDT, with base and quote either side of the hyphen. This is the Deepcoin venue specifically — a distinct global exchange feed, separate from the other exchange APIs in the catalogue, so cross-venue arbitrage and price-discovery workflows can read each book on its own terms.

api.oanor.com/deepcoin-api

CoinW Exchange API

Live spot market data from CoinW, a global crypto exchange, served straight from its public order books — no key on the data, nothing cached, nothing stored. Look up any market for its last price, best bid/ask and spread, 24h high/low, 24h change and turnover; rank every spot market for a quote currency (USDT, BTC, ETH…) by 24h turnover; list the tradable pairs with their base and quote; or pull live order-book depth with the running spread. Markets are addressed as BTC_USDT, with base and quote either side of the underscore. This is the CoinW venue specifically — a distinct global exchange feed, separate from the other exchange APIs in the catalogue, so cross-venue arbitrage and price-discovery workflows can read each book on its own terms.

api.oanor.com/coinw-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for BIP39 Mnemonic API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call BIP39 Mnemonic API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for BIP39 Mnemonic 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 BIP39 Mnemonic API cost?
BIP39 Mnemonic API has a free tier with 100 calls / month. Paid plans start at €3.80 / 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 BIP39 Mnemonic API GDPR-compliant?
All requests to BIP39 Mnemonic 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/bip39-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/bip39-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/bip39-api/SOME_PATH");
curl_setopt($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/bip39-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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