Link in Seconds documentation

Quickstart

Upload a file, get a public link and send it, in under a minute. The fastest path through Link in Seconds.

Plans and limits

Every limit on the Free, Pro and Lifetime plans: links, file size, storage, albums and which features need Pro.

Upload a file

How uploading works, what the link looks like, and what the person you send it to sees when they open it.

Supported file types

Which files you can share as a link, how each one opens in the browser, and which types are blocked for safety.

Albums

Upload several files at once and share them as one album link with a gallery view and a single ZIP download.

Static websites

Publish a ZIP of HTML, CSS and JavaScript as a live website with its own address and automatic SSL.

Link settings

Password, expiry date, view-only mode, view limit, custom link name, email gate and turning a link off.

Views and analytics

Views, time on file, page-by-page reading, watch-through, audience, traffic, timing, insights and CSV export, per link, album or account.

QR codes

Every link comes with a QR code you can download and print, and it keeps working when you replace the file.

Replace a file

Swap in a new version of a file without changing the link, the QR code or the view history.

Custom domains

Open a link, album or site on your own domain, such as docs.yoursite.com, with automatic SSL. A Pro feature.

Direct Send

Send a file of any size straight from your device to someone else's, encrypted in your browser, with no copy stored on our servers.

PDF tools

Merge, split, rotate, reorder, watermark and convert PDFs in your browser. Files never leave your device.

Account and billing

Sign in, upgrade, change or cancel your plan, download your data and delete your account.

Safety and reporting

How uploads are checked, why a link can be held for review, and how to report a link that breaks the rules.

Developer overview

The Link in Seconds API and MCP server: what you can build, how authentication works and where to start.

Authentication

Create an API key, send it as a Bearer token, keep it safe and delete it when you no longer need it.

Upload a file

Turn any file into a public link in three HTTP calls: create the upload, PUT the bytes, complete it. With curl, Node and Python.

List links

GET /api/v1/links returns your links, newest first, with their URLs and status.

Analytics

GET /api/v1/links/{slug}/analytics and GET /api/v1/analytics return the dashboard's report as JSON: views, time, read-through, audience, timing.

Errors and limits

Every error code the API returns, what causes it and how to handle it, plus rate limits and plan caps.

API reference

Every endpoint, parameter and response of the Link in Seconds API, with the OpenAPI document.

MCP server

Connect Claude, Cursor or any MCP client to Link in Seconds so your AI assistant can publish files and hand you the link.

Claude Code

Add the Link in Seconds MCP server to Claude Code with one command and publish files from your terminal.

Cursor

Add the Link in Seconds MCP server to Cursor so the agent can publish what it builds as a live link.

VS Code

Add the Link in Seconds MCP server to VS Code agent mode with an mcp.json file.

Other clients

Connect any MCP client that supports remote Streamable HTTP servers with a custom Authorization header.

Tools reference

Inputs, outputs and examples for upload_file, create_upload_url, finish_upload, list_links, get_link_analytics and get_account_analytics.

Agent discovery

The machine-readable files that tell AI agents what Link in Seconds offers: API catalog, MCP server card, agent skill, llms.txt.

AI crawlers

How AI crawlers can read our pages: Markdown on request, Content Signals in robots.txt and what we allow.