Integrate the Logo API in Minutes
Just HTTP requests. No API keys, no authentication, no SDK. Pick your stack below and copy the code.
Choose Your Stack
Click any technology to see code examples and integration details.
Quick Start
The simplest integration — just an HTML image tag:
<!-- Attribution required: link to https://logos.apistemic.com on your homepage -->
<img
src="https://logos-api.apistemic.com/domain:stripe.com"
alt="Stripe logo"
width="64"
height="64"
>API Reference
https://logos-api.apistemic.com/domain:{domain}Get logo by domain — e.g., /domain:stripe.com
https://logos-api.apistemic.com/linkedin:{slug}Get logo by LinkedIn slug — e.g., /linkedin:stripe
https://logos-api.apistemic.com/gridGet several logos as one image, e.g., /grid?logo=domain:stripe.com&logo=linkedin:notion&width=1200&height=630. Build one with the logo wall maker.
fallbackoptionalThe result if there is no logo: monogram (first letter), transparent (transparent image), or 404 (no image, which triggers the onerror of an <img>). Default: monogram.
formatoptionalwebp (smallest) or png for tools without WebP support, e.g. Google Docs and Slides or emails. Default: webp.
shapeoptionaloriginal as stored, or mark for the mark without its tile or circle, spanning the image; in a grid, marks are sized by their visual weight, and among mostly tiles, original logos without one get a plain tile. Default: original.
colorsoptionaloriginal, grayscale (all logos in a similar gray), or a hex color like 000000 that draws every logo in that one color. Default: original.
opacityoptionalHow visible the logos are: 0 invisible, 0.5 half transparent, 1 opaque. From 0 to 1. Default: 1.
widthrequiredSize of the image in pixels. From 32 to 2048.
heightrequiredSize of the image in pixels. From 32 to 2048.
logooptionalThe companies to show, one domain:… or linkedin:… per value; values that name no company are left out, like companies without a logo. Up to 50.
gapoptionalSpace between logos and around them, relative to the logo size. From 0 to 3. Default: 0.5.
stretchoptionalSpread the logos over the whole image, with gap as the smallest space between them. Default: false.
alignoptionalRows that are not full: center (spread evenly and centered), left (filled from the left), or crop (the last logos left out so that every row is full). Default: center.
backgroundoptionaltransparent or a hex color like ffffff. Default: transparent.
formatoptionalwebp (smallest) or png for tools without WebP support, e.g. Google Docs and Slides or emails. Default: webp.
shapeoptionaloriginal as stored, or mark for the mark without its tile or circle, spanning the image; in a grid, marks are sized by their visual weight, and among mostly tiles, original logos without one get a plain tile. Default: original.
colorsoptionaloriginal, grayscale (all logos in a similar gray), or a hex color like 000000 that draws every logo in that one color. Default: original.
opacityoptionalHow visible the logos are: 0 invisible, 0.5 half transparent, 1 opaque. From 0 to 1. Default: 1.
- •Returns a WebP image, or PNG with
format=png, named for saving, e.g.apistemic-logos-domain-stripe.com.webp - •Includes caching headers for optimal performance
- •Returns monogram (first letter) if logo not found (or 404 with
?fallback=404) - •Grids leave out companies without a logo and values that name no company:
X-Logos-Foundcounts the logos found (e.g. 17/20),X-Logos-Croppedlists the onesalign=cropleft out, and with none found the image is the empty background
Performance Tips
Lazy Loading
Use loading="lazy" for logos below the fold to improve initial page load.
Specify Dimensions
Always include width and height to prevent layout shift during loading.
Preload Critical Logos
For logos above the fold, use <link rel="preload">.
WebP Format
Our API returns WebP by default — 25-35% smaller than PNG with full browser support.
Need Help?
Have questions about integrating or a specific use case?