The best stock photo sources your AI agent can actually use

The honest situation for a marketer

Stock photography is the real-imagery lane you reach for when a generated photo would give the game away. Here is the part most guides get wrong: you do not need an API key or an MCP server to use it. Stock photos already live on free public websites, and Claude can use the web, so a marketer working inside Claude or Cowork can just have it find the shot and hand over the link, or grab the file straight from the site. No connector, no code.

One rule carries through however you get the image: licence discipline. Free stock has no model or property releases, so an identifiable face or a visible logo is a legal risk, and editorial-only assets can never run in an ad. Pick commercial-use assets, and drop the rest no matter how good the photo looks.

There is also a fully-automated route, where the agent fetches stock hands-off and at volume without anyone browsing. That one does use the library's API and does need a developer, so it lives in an Advanced section near the end alongside the paid premium libraries. It is for a technical teammate, not your starting point.

The free libraries to pull from

1. Top pick

   Pexels

   No key needed Commercial OK, no credit

   Best for: the cleanest free photos with the friendliest licence.

   A large free library, and commercial use is fine with no attribution required, which makes it the easiest to use. Claude can surface a direct image link by web search, open it in Claude in Chrome, or you grab it yourself in a click. Watch: no model releases, so avoid identifiable faces and logos in paid ads.

   In Plainpaper The agent finds the shot and hands the link to the board, or you drop the file on the card, and you approve before it runs.

2. Unsplash

   No key needed Credit appreciated

   Best for: high-quality, editorial-style photography.

   Free to use and easy to browse; credit the photographer where you can. The same release caveat applies for ads, so screen for identifiable people and logos.

   In Plainpaper Claude finds it, you approve it on the card.

3. Pixabay

   No key needed Watch trademarks

   Best for: photos plus illustrations and vectors in one place.

   Free and browseable. Gotcha: recognizable trademarks or logos block commercial use, so screen for them before you run anything.

   In Plainpaper Same browse-and-approve flow: the agent finds it or you grab it, and you sign off on the card.

4. Canva

   Claude connector Free plan

   Best for: when you want the stock already inside a design tool for on-brand assembly.

   The official Canva connector uses OAuth sign-in, no keys, and its bundled photo library is available on the free plan. One honest caveat: Claude may include a Pro-only asset that stays locked or watermarked until you upgrade.

   In Plainpaper The agent builds the design with the photo in Canva and exports it onto the card.

The short version

If you want a rule of thumb instead of the detail:

• Let Claude find one on Pexels, Unsplash or Pixabay, or grab it yourself. No key, no MCP, no code.
• Start with Pexels for the friendliest licence: commercial use is fine and no credit is required.
• Use Canva when you want the stock already inside a design for on-brand assembly.
• Reach for the API route or a premium library only when you need automated, high-volume, or licensed premium stock. That is the Advanced tier.
• Keep licence discipline everywhere: commercial-use assets only, and no identifiable people or logos in ads.

Advanced tier: automating it, and the premium libraries

This tier is for a technical teammate. It covers two things: fully automated fetching, where the agent pulls stock hands-off and at volume without anyone browsing, which uses the library APIs and a community server; and the paid or gated premium libraries, where the imagery is licensed and metered. Both need an API key or a paid subscription and a developer setup, so hand this list to someone who can stand up a server and manage the keys.

1. The library APIs (Pexels, Pixabay, Unsplash)

   API key, for automation

   Only needed if you want the agent to fetch stock fully hands-off at volume without browsing. That means the library's API key and a community MCP, which is developer work.

2. Shutterstock

   Premium, no connector

   Paid and metered, with no official Claude connector, so it needs developer setup.

3. Getty / iStock

   Premium, gated

   Not self-serve; only a third-party bridge that needs tokens.

4. Adobe Stock

   Metered / enterprise

   Reachable only inside the Adobe connector, and its licensing is metered.

5. Envato Elements

   Search connector; paid download

   An official add-by-URL connector that searches, but downloading needs a paid Elements subscription.

How this works with Plainpaper

Plainpaper does not host a stock library. Claude finds the photo on a free public site, or you grab it yourself, and Plainpaper is the board the result lands on. The routing pattern is the same whichever way you reach the image.

Claude can find a dozen candidates on the free libraries in seconds, or you drop one on the card yourself. The board is where one human decides which image is on-brand, cleared, and good enough to run.

Frequently asked questions

Do I need an API key or an MCP server to use stock photos in Claude?

No. Stock photos are on free public sites and Claude can use the web. Web search finds one and hands you the link, Claude in Chrome opens the library and pulls the file, or you grab it yourself in two clicks. The API route is only for fully automated, high-volume fetching, and that is the Advanced tier a developer sets up.

What is the best free stock photo source?

Pexels, for the friendliest licence: commercial use is fine and no attribution is required, and Claude can find and surface it for you by web search. Unsplash and Pixabay are strong free alternatives.

How does Claude actually get the image onto the board?

It finds the image by web search or with Claude in Chrome and hands the link to Plainpaper, which re-hosts it onto a card, or you drop the file on the card yourself. You approve before it runs.

Can I use free stock photos in a paid ad?

Carefully. Free stock has no model or property releases, so avoid identifiable people, brands and logos, and never imply endorsement. Pick commercial-use assets, and when a face or a location is central to the ad, use an image licensed and released for commercial use.

When would I ever need the API or a premium library?

When you want the agent to fetch stock fully hands-off at high volume without browsing, or you need licensed premium imagery from Shutterstock or Getty. That is the Advanced tier, it uses the library's API key or a paid connector, and it needs a developer.

Next step

You have the free path: let Claude find the photo, or grab it yourself, no key and no code. The piece that turns it into a workflow is the board in the middle, where every image becomes visible, linked to its licence, and approvable before it runs. Browse the rest of the tools gallery to fill out the stack, and if you need footage too, the same browse-and-grab logic maps onto our stock video guide.