Image APIs compared for AI agents
Unsplash, Pexels, Pixabay, and Openverse all offer free image search APIs, and all of them search by keyword. Lightdrift searches by meaning or by reference image, returns a license answer on every result, and ships an MCP server. Here is how they compare, with every competitor fact linked to its source.
Updated
Summary
| Search | Search by image | License data per result | Official MCP | |
|---|---|---|---|---|
| Lightdrift | Natural language | Yes (paid plans) | Yes | Yes |
| Unsplash API | Keyword | No | No (single license) | No |
| Pexels API | Keyword | No | No (single license) | No |
| Pixabay API | Keyword | No | No (single license) | No |
| Openverse API | Keyword | Related works only | Yes | No |
Lightdrift: 1,852,370 captioned Creative Commons and public domain images from 17 sources. Free plan with 500 credits a month (up to 5,000 results); paid plans from $29 a month.
Detailed comparisons
- Unsplash API alternative for AI agents
The Unsplash API searches a curated library of high quality photos by keyword under a single Unsplash License. Lightdrift searches openly licensed images by meaning, including by reference image, and returns a license answer with every result through an API or an MCP server.
- Pexels API alternative for AI agents
The Pexels API is a free keyword search over the Pexels library of stock photos and videos under the Pexels License. Lightdrift searches openly licensed images by meaning or by reference image and returns per-result license and attribution data, through an API or an MCP server.
- Pixabay API alternative for AI agents
The Pixabay API is a free keyword search over Pixabay's photos, illustrations, vectors, and videos under the Pixabay Content License. Lightdrift searches openly licensed images by meaning or reference image and returns per-result license data through an API or an MCP server.
- Openverse API alternative for AI agents
Openverse is a free, open source search engine for openly licensed works, built as part of the WordPress project, with a much larger catalog than Lightdrift. Its API searches titles, descriptions, and tags by keyword. Lightdrift searches a smaller, captioned index by meaning or by reference image, hosts the files, and ships an MCP server.
