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API · /sslcheck-api

SSL Certificate API

healthy 3,172 Subscribers

Check any website's SSL/TLS certificate as an API. Pass a domain and the service performs a live TLS handshake and returns the certificate's subject and issuer, the validity window, the exact number of days until it expires, whether it is currently valid and trusted by a standard CA chain, the negotiated TLS protocol, serial number, SHA-256 fingerprint, key size and the full list of Subject Alternative Names (SANs). A lean expiry endpoint returns a simple ok / expiring_soon / expired status, perfect for uptime and certificate-expiry monitoring, dashboards, CI checks and security tooling. Self-contained — no third-party service. IP addresses and internal hosts are not supported.

#ssl #tls #certificate #security #devops #monitoring
api.oanor.com/sslcheck-api
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Machine-readable spec so AI agents can integrate this API.

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

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

SSL Certificate API — live data on the oanor API marketplace

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
101 ms
Server probes · 24h
Subscribers
3,172
active
Total calls
57
last 7 days
status Full status page → · 9 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 3,420 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • 3,420 calls/month
  • 2 req/sec
  • Certificate + expiry check
  • No credit card
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Starter

€3.95 /month

  • 47,600 calls / month
  • 8 requests / second
  • Hard cap (429 above quota, no overage)
  • 47.6k calls/month
  • 8 req/sec
  • SANs / chain trust / fingerprint
  • Email support
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Pro

€12.05 /month

  • 236,000 calls / month
  • 20 requests / second
  • Hard cap (429 above quota, no overage)
  • 236k calls/month
  • 20 req/sec
  • Expiry monitoring / CI checks
  • Priority support
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Mega

€32.90 /month

  • 1,188,000 calls / month
  • 50 requests / second
  • Hard cap (429 above quota, no overage)
  • 1.19M calls/month
  • 50 req/sec
  • Security-monitoring platform
  • Dedicated SLA
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Built by

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Related APIs

Other APIs with overlapping tags.

CSR API — oanor API marketplace

CSR API

Generate and parse X.509 Certificate Signing Requests (PKCS#10) — the CSRs you submit to a Certificate Authority to obtain a TLS certificate. Generate a CSR from a common name plus optional organisation, country, locality and Subject Alternative Names, and get back the CSR together with a freshly-generated RSA private key (2048/3072/4096). Or parse an existing CSR to read its subject, SANs, key size and whether its signature is valid. Pure local processing — no key, no third-party service. Note: for development and testing; keep production private keys offline. Live, nothing stored. 3 endpoints. Distinct from key-pair generation, certificate decoding and live SSL checks.

api.oanor.com/csr-api

 Certificate Decoder API — oanor API marketplace

Certificate Decoder API

Decode an X.509 certificate (PEM) into readable details — without a live connection. Paste a certificate and get back its subject and issuer (parsed into fields), the validity window with days-until-expiry and an expired flag, the serial number, SHA-1 and SHA-256 fingerprints, the Subject Alternative Names, the public-key type and size, and the CA / self-signed flags. Pure local parsing with no third-party service. Live, nothing stored. 2 endpoints. Built for certificate inspection, CI/CD expiry checks, PKI debugging and audit tooling. Distinct from a live SSL/TLS endpoint checker — this decodes a certificate you already hold.

api.oanor.com/certdecode-api

 Shentu API — oanor API marketplace

Shentu API

Live on-chain data for Shentu (chain id shentu-2.2) — the security-focused Cosmos-SDK Layer-1 of the CertiK ecosystem, whose native token is CTK — served directly from public LCD/REST nodes with multi-node failover. The status endpoint returns the latest block height and time, chain id, the staking bond denom and the current minting inflation rate. The validators endpoint lists the active bonded validator set ranked by stake, each with its moniker, operator address, self-plus-delegated CTK, commission rate and jailed flag. The supply endpoint returns the total CTK supply, the amount bonded in staking and the resulting bonded ratio. The governance endpoint returns the most recent on-chain proposals with their id, title, status and voting window. Token amounts are converted from base micro-CTK (6 decimals) into whole CTK, and every figure is read live from the chain — nothing bundled or modelled — behind a short server-side cache with keep-warm so the feed stays fast and fresh. Ideal for staking dashboards, validator and delegator tooling, explorers, governance trackers and portfolio or analytics apps across the Cosmos and security-infrastructure ecosystem. Live keyless upstream. 5 endpoints.

api.oanor.com/shentu-api

 Solana Program API — oanor API marketplace

Solana Program API

Inspect deployed Solana programs live from public Solana RPC — no key — and answer the question that matters most for safety: can this program still be changed, and by whom? For any program address it resolves the loader it runs under, whether it is executable, its on-chain ProgramData account, the upgrade authority (or that it has been made immutable / frozen), and the slot it was last deployed at. A batch endpoint audits up to twelve programs at once — perfect for checking the upgrade authority of every program a protocol depends on before you trust it — and a loaders endpoint documents Solana's program loaders. Distinct from balance, token and transaction APIs: this is the program and upgrade-authority layer that auditors, wallets and security tooling rely on to judge whether a Solana program is safe. Live from the chain; short cache only.

api.oanor.com/solanaprogram-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for SSL Certificate API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call SSL Certificate API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for SSL Certificate 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 SSL Certificate API cost?
SSL Certificate API has a free tier with 100 calls / month. Paid plans start at €3.95 / 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 SSL Certificate API GDPR-compliant?
All requests to SSL Certificate 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/sslcheck-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/sslcheck-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/sslcheck-api/SOME_PATH");
curl_setopt($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/sslcheck-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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