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API · /hashids-api

Hashids API

healthy 4,914 Subscribers

Turn sequential integer IDs into short, unique, non-sequential strings — and back again. Encode one or more non-negative integers (or a hex string such as a Mongo ObjectId) into a compact YouTube-style id like "vbYCZIYD", then decode it to recover the exact original values. Add a salt so your ids are unique to your application, set a minimum length, or supply a custom alphabet. It is reversible obfuscation (not encryption): perfect for hiding row ids in public URLs, building short links, and avoiding leaking how many records you have. Pure local computation — no key, no third-party service, nothing stored. Stateless: decode with the same salt/min-length/alphabet you encoded with. Live. 5 endpoints. Distinct from UUID generation, base conversion and snowflake decoding.

#hashids #id-obfuscation #short-id #encoding #developer-tools #utilities
api.oanor.com/hashids-api
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Machine-readable spec so AI agents can integrate this API.

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

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

Hashids API — live data on the oanor API marketplace

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
72 ms
Server probes · 24h
Subscribers
4,914
active
Total calls
95
last 7 days
status Full status page → · 10 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 1,540 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • 1,540 calls/month
  • 2 req/sec
  • Encode + decode (int & hex)
  • No credit card
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Starter

€7.20 /month

  • 30,000 calls / month
  • 8 requests / second
  • Hard cap (429 above quota, no overage)
  • 30k calls/month
  • 8 req/sec
  • Custom salt / alphabet
  • Email support
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Pro

€26.80 /month

  • 186,000 calls / month
  • 20 requests / second
  • Hard cap (429 above quota, no overage)
  • 186k calls/month
  • 20 req/sec
  • URL / short-link pipelines
  • Priority support
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Mega

€62.80 /month

  • 950,000 calls / month
  • 50 requests / second
  • Hard cap (429 above quota, no overage)
  • 950k calls/month
  • 50 req/sec
  • Platform scale
  • Dedicated SLA
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Base45 API

Encode and decode Base45 (RFC 9285) — the compact binary-to-text encoding designed to pack densely into the alphanumeric mode of QR codes, best known as the carrier for the EU Digital COVID Certificate. The encode endpoint turns text (UTF-8) or raw bytes given as hex into a Base45 string; the decode endpoint turns a Base45 string back into bytes, returned as hex and — when the bytes are valid UTF-8 — as text. It uses the official 45-character alphabet (0-9, A-Z and a handful of symbols), packs two bytes into three characters (or one byte into two), and validates length and value ranges strictly so malformed input is rejected rather than silently mangled. Everything is computed locally and deterministically, so it is instant and private. Ideal for QR-code payloads, digital health and travel certificates, alphanumeric-mode encoders, and any binary data that must survive an uppercase-only channel. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is Base45 specifically; for base64, base32, hex, URL or HTML entity encoding use a general encoding API.

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Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for Hashids API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Hashids API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for Hashids 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 Hashids API cost?
Hashids API has a free tier with 100 calls / month. Paid plans start at €7.20 / 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 Hashids API GDPR-compliant?
All requests to Hashids 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/hashids-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/hashids-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/hashids-api/SOME_PATH");
curl_setopt($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/hashids-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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