Frequently asked questions
What MemeStack is and how it works.
Last updated July 28, 2026
What is MemeStack?
MemeStack is a visual search engine for memes, infographics, charts, and screenshots. Every image gets AI-generated captions, tags, and OCR, so you can find that one chart that explains X by describing it, quoting the words printed inside it, or dropping in a similar image. Read more on the About page.
Is it Bitcoin-only?
No — topic-agnostic. The Lightning-ranked angle is how images get sorted by community zaps, but the subject can be anything: Bitcoin, politics, science, sports, history, philosophy. Only NSFW, gore, and spam are blocked.
What kind of content fits?
Self-sufficient visuals — images that communicate a complete idea, joke, or argument on their own. Filled meme templates with punchlines, editorial cartoons, infographics, charts, multi-panel comparisons, diagrams, screenshots that make a point. Pretty pictures, stock photos, decorative art, generic landscapes, food photos, AI fantasy without commentary, blank meme templates, uncaptioned reaction faces, and personal photos (birth charts, family pics, selfies) don't fit — those are raw material or private data, not shareable content. The bar: would you send this image to a friend to settle a debate or explain something?
Who can upload?
Anyone with an account. You can sign in with Lightning (LNURL-auth) or with an email magic link. Daily upload caps are tier-gated based on your account history — new accounts start smaller and unlock more as they build a track record. Head to /upload to get started.
Why Lightning?
Zaps signal real engagement — sending sats to an image costs more than a thumbs-up does. Sorting by zaps means quality is community-vetted with money, not algorithm-vetted. Browse the leaderboard to see what's currently winning.
How does AI tagging work?
When you upload an image, a vision model produces a human-readable caption, a set of scored topic tags, and a full OCR transcription of any text in the image. That metadata is indexed and powers both keyword and semantic search. Technical details live in the developer docs.
Can I delete my content?
Yes. Owner deletes are hard deletes — the database row and the R2 object are both removed. There's no soft-delete, no shadow copy, no recovery window after you confirm. See the terms for the full data-handling policy.
Is the API free?
Yes — every read endpoint is public and unauthenticated. Search, browse, image metadata, related images, leaderboard, tags — all free, no API key required. The full reference is at /developers, and there's also an MCP server at mcp.memestack.ai for AI agents.
Is there a mobile app?
No native app — the web app is fully mobile-friendly and works in any modern browser. You can also install it as a PWA (Progressive Web App) for a home-screen icon and full-screen experience: tap your browser's share menu, then "Add to Home Screen".
Do you sell my data?
No. We don't sell user data, and we don't share it with third parties for advertising or analytics resale. The full policy — what we collect, how long we keep it, and what your rights are — is in the privacy policy.
How do I report content?
Every image has a report button on its detail view — pick a reason and submit. Reports go straight into the moderation queue and are reviewed by admins. For details on what gets actioned and how, see the terms.
What is the MemeStack browser extension?
A browser extension that saves any image you find online straight to MemeStack — right-click the image, pick Save to MemeStack, and it uploads in the background. No downloading and re-uploading, no switching tabs. The image runs through the same AI captioning and tagging as a normal upload, and you get a notification when it lands. It is available now for Chrome, Edge, Brave and other Chromium browsers — get it here. A Firefox version is coming.
Why does the extension ask for access to all sites?
Because the image is almost never on the site you are looking at. A picture on Reddit is served from i.redd.it, one on X from pbs.twimg.com — so permission for the page you are on would not let the extension download the picture on it. The narrower alternative browsers offer grants access only after you invoke the extension, which is too late: the right-click position has to be recorded at the moment you right-click, and that is what makes saving work on sites that block the normal image menu. The extension reads nothing on the pages you visit and sends no browsing history anywhere.
What does the extension send when I save an image?
The image itself, plus its size, type and a checksum. That is it. The address of the page you were on never leaves your device. Saving also performs one DNS lookup of the image host through Cloudflare, which is how the extension refuses to fetch anything resolving to your own home network. Your login is a restricted token that can upload and nothing else — it is rejected outright on wallet, payment and admin endpoints. Full detail on the Privacy page.
How do I log in to the extension?
Two ways. Open the extension and scan the Lightning QR code with your wallet, or — if you signed up with email — log in on memestack.ai and use the connect button, which hands the extension a token in one click. Either way the extension holds an upload-only credential, not your full account session.
What happens to my images if I uninstall the extension?
Nothing — they stay. Anything you saved is an ordinary MemeStack upload and lives in your account exactly like an image you uploaded on the site. Uninstalling removes the extension and its stored login, and nothing else.
More questions? Email contact@memestack.ai.