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API · /placeholder-api

Placeholder API

healthy 3,848 Subscribers

A fast, fully-local SVG generator for mockups and UIs: placeholder images (a sized rectangle with centered text and automatic contrast), initials avatars (with a deterministic colour derived from the name, in a circle or square), and identicon-style symmetric patterns generated deterministically from any seed. Every endpoint returns the JSON envelope or, with raw=1, the raw SVG so the URL can be used directly as an image source. Pure server-side compute, no third-party upstream, so responses are instant and always available. Ideal for prototypes, dashboards, user avatars, empty states and design systems.

#placeholder #image #avatar #svg #identicon #dev-tools
api.oanor.com/placeholder-api
Get an API key Try in playground → Contact provider

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

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

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

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
82 ms
Server probes · 24h
Subscribers
3,848
active
Total calls
6
last 7 days
status Full status page → · 6 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 22,000 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • 22,000 images/month, 2 req/s
  • Placeholder, initials-avatar & identicon SVG
  • JSON or raw SVG output
  • No credit card
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Basic

€3.00 /month

  • 330,000 calls / month
  • 12 requests / second
  • Hard cap (429 above quota, no overage)
  • 330,000 images/month, 12 req/s
  • Auto-contrast text & deterministic colours
  • Circle or square avatars
  • Commercial use, email support
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Pro

€9.00 /month

  • 2,100,000 calls / month
  • 40 requests / second
  • Hard cap (429 above quota, no overage)
  • 2,100,000 images/month, 40 req/s
  • High-throughput generation
  • Identicon patterns from any seed
  • Priority email support
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Mega

€26.00 /month

  • 11,000,000 calls / month
  • 150 requests / second
  • Hard cap (429 above quota, no overage)
  • 11,000,000 images/month, 150 req/s
  • Bulk volume for CDN/edge use
  • Maximum concurrency
  • Priority support
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Built by

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PremiumApi

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api.oanor.com/image-api

QR Code API

Generate QR codes on demand as a base64 PNG, an SVG, or a raw embeddable image. Customise size, quiet-zone margin, error-correction level and foreground/background colors. Encode URLs, text, Wi-Fi, vCards and more.

api.oanor.com/qr-api

Astronomy API

A fast, fully-local astronomy and ephemeris engine: compute the equatorial (right-ascension/declination) and horizontal (azimuth/altitude) positions of the Sun, Moon and all planets for any observer and moment, get precise rise, set and transit (culmination) times for any body, read detailed lunar state (phase angle, named phase, illuminated fraction, apparent magnitude, geocentric distance, age since the last new moon and the dates of the next new/first-quarter/full/last-quarter moons), and list the exact equinoxes and solstices of any year. Every endpoint accepts input via the query string or the request body. Pure server-side computation (no third-party upstream), so responses are instant and always available. Ideal for weather and tide apps, astrophotography planners, calendars, solar/energy tools, Islamic and lunar calendars, and education.

api.oanor.com/astronomy-api

Geohash API

Work with geohashes through a fast, fully-local API. Encode a latitude/longitude pair into a geohash at any precision (1–12), decode a geohash back to its centre coordinates with the exact bounding box and error margins, list the eight neighbouring geohash cells (north, north-east, east and so on), or get the bounding box, centre and dimensions of a cell. Geohashes turn coordinates into short sortable strings that are perfect for spatial indexing, proximity grouping and map tiling. Pure server-side computation with no third-party upstream, so responses are instant and the service is always available. Ideal for geospatial indexing and search, proximity and nearby queries, map tiles and clustering, IoT and fleet tracking, and location bucketing in databases.

api.oanor.com/geohash-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for Placeholder API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Placeholder API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for Placeholder 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 Placeholder API cost?
Placeholder API has a free tier with 100 calls / month. Paid plans start at €3.00 / 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 Placeholder API GDPR-compliant?
All requests to Placeholder 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/placeholder-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/placeholder-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/placeholder-api/SOME_PATH");
curl_setopt($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/placeholder-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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