API · /vcard-api

vCard API

healthy 3,680 Subscribers

Generate and parse vCard (.vcf) contact cards. Build a standards-compliant vCard 3.0 from simple fields — name (or first/last), organisation, job title, one or more phone numbers and emails, websites, a postal address, birthday, note and a photo URL — ready to download as a .vcf or embed in a contact QR code (pair it with the QR API for "scan to save contact"). Or go the other way: parse any vCard string back into clean structured fields. Pure local processing — no key, no third-party service, nothing stored. Live. 3 endpoints. Built for digital business cards, contact QR codes, address-book import/export, CRM integrations and email-signature tools.

#vcard #contact #vcf #developer-tools #utilities #qr-code

api.oanor.com/vcard-api

Get an API key Try in playground → Contact provider

Machine-readable spec so AI agents can integrate this API.

/api/vcard-api/openapi.json

/api/vcard-api/llms.txt

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

API health

healthy

Uptime: 100.00%; Server probes · 24h
Avg latency: 86 ms; Server probes · 24h
Subscribers: 3,680; active
Total calls: 42; last 7 days

Full status page → · 15 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

1,600 calls / month
2 requests / second
Hard cap (429 above quota, no overage)
1,600 calls/month
2 req/sec
Generate + parse
No credit card

Starter

€7.80 /month

33,000 calls / month
8 requests / second
Hard cap (429 above quota, no overage)
33k calls/month
8 req/sec
Multi phone/email/url
Email support

Pro

€27.40 /month

192,000 calls / month
20 requests / second
Hard cap (429 above quota, no overage)
192k calls/month
20 req/sec
CRM / signature tools
Priority support

Mega

€63.40 /month

980,000 calls / month
50 requests / second
Hard cap (429 above quota, no overage)
980k calls/month
50 req/sec
Platform scale
Dedicated SLA

Built by

PremiumApi

Related APIs

Other APIs with overlapping tags.

QR Code with Logo API

Generate branded QR codes with a centre logo overlay, custom foreground and background colors, chosen size and error-correction level, as PNG or SVG. When a logo is supplied the error-correction level is raised automatically so the code stays scannable, and the logo is placed on a rounded white plate in the centre. Includes one-call helpers that build the correct payload for you: a Wi-Fi-join QR (SSID, password, encryption, hidden), a vCard contact QR (name, phone, email, organisation, title, URL, address) and a batch endpoint that returns up to 100 QR codes in a single request. Supply a logo by public URL, base64 or a raw binary body; receive results as base64 PNG/SVG JSON or, with raw=1, the raw image bytes. Pure server-side rendering (qrcode + sharp), no third-party upstream. Ideal for marketing and packaging, business cards and events, restaurant menus, Wi-Fi sharing and app onboarding.

api.oanor.com/qrlogo-api

Chimney & Flue API

Chimney and flue sizing maths as an API, computed locally and deterministically — the draft and dimension numbers a stove installer, sweep or builder runs so a fire pulls cleanly and safely. The flue-size endpoint gives the minimum flue cross-section for a fireplace opening: at least a tenth of the opening area for a square or rectangular liner, a twelfth for a round one (which draws better) — a 36 × 30 inch opening needs about 108 square inches of rectangular flue, or a 10.7-inch round. The draft endpoint gives the theoretical draft from the stack effect, ΔP ≈ 3465 × height × (1/T_outside − 1/T_flue) with temperatures in kelvin, so a 6-metre chimney with 200 °C flue gas on a freezing day pulls about 32 pascals (0.13 inches of water column) — taller and hotter draws harder. The height endpoint applies the 3-2-10 rule: a chimney must finish at least 3 feet above where it pierces the roof and at least 2 feet above anything within 10 feet, whichever is higher. Everything is computed locally and deterministically, so it is instant and private. Ideal for hearth and stove-installer apps, chimney-sweep and inspection tools, building-design calculators, and DIY-safety sites. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 compute endpoints. Educational estimates — verify against your appliance listing and adopted code.

api.oanor.com/chimney-api

Fishing Tackle API

Angling and tackle maths as an API, computed locally and deterministically — the three numbers that decide how a reel is spooled and a lure is fished. The line-capacity endpoint works out how much line of a different diameter a reel will hold: line lies on the spool by cross-sectional area, so capacity scales with the inverse square of diameter — a reel rated for 100 yards of 0.30 mm holds about 73.5 yards of thicker 0.35 mm, or nearly 140 yards of a thinner 0.011-inch braid. The sink-time endpoint gives the countdown to fish a lure at depth: time = depth ÷ sink rate, so a minnow that sinks a foot a second reaches ten feet on a count of ten. The drag endpoint sets the reel: about 25–33 % of the line's breaking strength measured at the rod tip — a 20-pound line wants roughly 5 to 6.6 pounds of drag, enough to let a fish run before anything snaps. Everything is computed locally and deterministically, so it is instant and private. Ideal for fishing and tackle apps, reel-spooling and gear-shop tools, angler trip-planners, and learning sites. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 compute endpoints. Unit-agnostic — keep your units consistent; rules of thumb, conditions vary.

api.oanor.com/fishing-api

Aquaculture API

Fish-farming (aquaculture) maths as an API, computed locally and deterministically — the stocking, feed and oxygen numbers a fish farmer or RAS designer runs a system on. The stocking endpoint turns a tank or pond volume and a target biomass density into a fish count: biomass = density × volume, count = biomass ÷ average fish weight — a 10 m³ tank at 30 kg/m³ holds 300 kg, about 1,200 fish at 250 g each, and you stock to the harvest weight, not the fingerling weight, so the tank does not overload as they grow. The feed endpoint gives the daily ration as a percentage of body weight, and the feed to reach a target weight gain through the feed conversion ratio — 300 kg fed at 2 % is 6 kg a day, and growing 100 kg of fish at an FCR of 1.2 takes 120 kg of feed. The oxygen endpoint gives the dissolved-oxygen demand of a stock — biomass × the per-kg consumption rate — so 300 kg at 300 mg O₂/kg/hr needs 90 g of oxygen an hour, the number your aeration must beat. Everything is computed locally and deterministically, so it is instant and private. Ideal for aquaculture and RAS-design apps, fish-farm management tools, hatchery and feed calculators, and ag-tech sites. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 compute endpoints. Commercial-planning estimates — species and system vary. For a home aquarium use an aquarium API.

api.oanor.com/aquaculture-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for vCard API?

Sign up for free at oanor.com, generate an API key from the developer dashboard, and call vCard API with the x-oanor-key header. No credit card needed for the free tier.

What's the rate limit for vCard 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 vCard API cost?

vCard API has a free tier with 100 calls / month. Paid plans start at €7.80 / 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 vCard API GDPR-compliant?

All requests to vCard 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.

vCard 2

Meta 1

Pick an endpoint from the list on the left to see its details and try it.

GET /v1/generate

Generate a vCard

Playground

Parameters

Custom headers

Language: Client:

GET /v1/parse

Parse a vCard

Playground

Parameters

Custom headers

Language: Client:

GET /v1/meta

Spec

Playground

Custom headers

Language: Client:

Code snippets

curl https://api.oanor.com/vcard-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."

const res = await fetch("https://api.oanor.com/vcard-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();

$ch = curl_init("https://api.oanor.com/vcard-api/SOME_PATH");
curl_setopt($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/vcard-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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vCard API

API health

Pricing

Built by

Related APIs

QR Code with Logo API

Chimney & Flue API

Fishing Tackle API

Aquaculture API

Frequently asked questions

Parameters

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