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API · /urischemes-api

URI Schemes API

healthy 3,221 Subscribers

The IANA Uniform Resource Identifier (URI) Schemes registry as an API — all 413 registered schemes (http, https, mailto, tel, ftp, ssh, magnet, bitcoin, geo, did, …). Look up any scheme to get its description, registration status (Permanent, Provisional or Historical) and defining reference; search by name or description; or list all schemes filtered by status. Ideal for URL parsers and validators, link handlers, deep-linking, security allow-lists and developer tooling that needs to recognise or vet URI schemes.

#uri-schemes #uri #url #iana #reference #protocols
api.oanor.com/urischemes-api
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Machine-readable spec so AI agents can integrate this API.

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

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

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
87 ms
Server probes · 24h
Subscribers
3,221
active
Total calls
240
last 7 days
status Full status page → · 20 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 25,000 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • 25,000 calls/month
  • 2 req/sec
  • Lookup + search + list
  • No credit card
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Starter

€1.50 /month

  • 200,000 calls / month
  • 8 requests / second
  • Hard cap (429 above quota, no overage)
  • 200k calls/month
  • 8 req/sec
  • Status filtering
  • Email support
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Pro

€5.00 /month

  • 900,000 calls / month
  • 20 requests / second
  • Hard cap (429 above quota, no overage)
  • 900k calls/month
  • 20 req/sec
  • URL validation / allow-lists
  • Priority support
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Mega

€15.00 /month

  • 4,000,000 calls / month
  • 50 requests / second
  • Hard cap (429 above quota, no overage)
  • 4M calls/month
  • 50 req/sec
  • Platform scale
  • Dedicated SLA
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Built by

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Related APIs

Other APIs with overlapping tags.

Domain Parser API

Parse any hostname or URL with the Public Suffix List. Split a domain into its subdomain, registrable domain (eTLD+1) and public suffix (eTLD), or fetch just the suffix or just the registrable domain. Handles full URLs, internationalized (punycode) domains, IP addresses, multi-level suffixes like co.uk and com.au, and — when you ask for it — private suffixes such as github.io and s3 buckets. Built on an always-current Public Suffix List and served entirely in-memory, so responses are instant and the service is always available. Ideal for cookie and domain scoping, analytics attribution, email and link validation, security and anti-abuse, and devops tooling.

api.oanor.com/domain-api

URL Tools API

Unfurl link previews — title, description, image, site name and favicon (Open Graph + meta tags) — and expand / unshorten URLs by following redirects to their final destination. Perfect for chat unfurls, link cards and resolving short links.

api.oanor.com/url-api

IP Protocol Numbers API

The IANA "Assigned Internet Protocol Numbers" registry as an API — the 8-bit value carried in the IPv4 Protocol field (and IPv6 Next Header) that identifies the encapsulated protocol. Resolve any number to its protocol (e.g. 6 → TCP, 17 → UDP, 1 → ICMP, 47 → GRE, 50 → ESP, 58 → IPv6-ICMP, 89 → OSPF, 132 → SCTP), look up by keyword, search by name, or list all 151 assigned protocols — each with its keyword, full name, IPv6-extension-header flag and defining RFC. Ideal for packet/firewall tooling, network analysis, NetFlow/IPFIX decoders and protocol documentation. (Distinct from transport-layer service port numbers.)

api.oanor.com/ipprotocols-api

HTTP Reference API

A clean, programmatic reference for HTTP semantics, built on the official IANA registries. Look up any status code with its reason phrase and class (404 → Not Found, Client Error; 503 → Service Unavailable, Server Error), list a whole class (4xx, 5xx…); look up any method with its safe/idempotent flags (GET → safe + idempotent, POST → neither, DELETE → idempotent); or look up / search the 255 registered HTTP header fields (Content-Type, Authorization, …) with their registration status. Ideal for API tooling, HTTP clients, documentation, linters, learning resources and error pages.

api.oanor.com/http-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for URI Schemes API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call URI Schemes API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for URI Schemes 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 URI Schemes API cost?
URI Schemes API has a free tier with 100 calls / month. Paid plans start at €1.50 / 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 URI Schemes API GDPR-compliant?
All requests to URI Schemes 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/urischemes-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/urischemes-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/urischemes-api/SOME_PATH");
curl_setopt($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/urischemes-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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