Developer platform

Files.fm API

Build and automate secure file upload, storage, sharing, processing, and content management workflows using the Files.fm API and MCP.

The Files.fm API allows developers to integrate scalable EU-based cloud storage into web, mobile, desktop, and server-side applications without building and maintaining their own file storage infrastructure and heavy file processing such as video, audio, or image conversion and streaming.

View API Documentation Connect an AI assistant Swagger UI OpenAPI YAML

curl -X POST \
  https://api.files.fm/api_v2/get_folder_content \
  -d user=YOUR_USER \
  -d user_access_token=YOUR_TOKEN \
  -d folder_hash=FOLDER_HASH

[{ "type": "file", "name": "report.pdf", ... }]

Three ways to integrate

REST API for files and folders Upload, organize, share, preview and sign files from your own application. Documented with an OpenAPI 3 specification. REST API reference → DMS API for business data Create and update tasks, add comments and attachments, and read projects, clients and contacts in the Files.fm document management system. DMS API reference → MCP connector for AI assistants Let ChatGPT, Claude, Cursor and other AI assistants work with your files and tasks. Add one address, sign in and approve access. Set up in minutes →

What you can build

Customer file upload portals

Secure cloud storage integrations

Large file transfer workflows

Media and photo delivery systems or mobile apps

Client folders and project file rooms

E-signature and document workflows

File preview, thumbnail, ZIP, and download tools

AI, OCR, and media-processing pipelines

SaaS products that need reliable file storage and sharing

Main API capabilities

Upload, download, rename, move, delete, and restore files
Create, rename, move, delete, and restore folders
Retrieve file and folder metadata
Generate secure direct download and sharing links
Download folders and selected files as ZIP archives
Use image thumbnails and video previews
Convert images, videos, and documents
Apply image watermarks
Share files for electronic signature
Store and retrieve end-to-end encryption key data
Manage document management tasks, comments and attachments
Integrate AI-powered file and content-processing workflows

Developer documentation

The Files.fm API documentation includes endpoint descriptions, authentication details, request parameters, response formats, and examples. The OpenAPI specification can be imported into tools such as Swagger UI, Postman, Insomnia, Stoplight, Redoc, code generators, test tools, and AI coding assistants.

New

Connect your AI assistant to Files.fm

With the hosted MCP connector, ChatGPT, Claude, Cursor and other AI assistants can find, read and organize your files and work with your document management tasks, always within the permissions of your own account.

MCP (Model Context Protocol) is an open standard that lets AI assistants use external tools and data securely. You add one address to your assistant, sign in to Files.fm and choose what to allow.

Server address https://files.fm/mcp

Also available at https://api.files.fm/api/mcp. Streamable HTTP, JSON-RPC 2.0.

Sign-in

Sign in with your Files.fm account and approve the requested access. No API key is needed, and any confirmed account can connect, including free accounts.

What your assistant can do

Find, list and read your files and folders
Create folders, upload or import new files, and rename or move files and folders
Read document management tasks and projects, create and update tasks, add comments and attach files
Search the Files.fm API and MCP documentation

Your assistant can only do what you approve and what your account is allowed to do. It cannot delete or overwrite files or change sharing settings. Content the assistant reads is processed by your AI provider under its own terms.

Try asking

Find the latest contract for our client, summarize the open points and save the summary next to it.
Create a folder for the new project and move the related drafts into it.
Create tasks for the website launch, assign them to the team and attach the brief.

Connect your assistant

In ChatGPT settings, add a custom connector with this server address, then sign in to Files.fm when asked. Custom connectors depend on your ChatGPT plan.

https://files.fm/mcp

In Claude, add a custom connector with this server address and sign in to Files.fm. Menu names can differ between Claude apps and plans. In Claude Code, run the command below.

https://files.fm/mcp

claude mcp add --transport http filesfm https://files.fm/mcp

Add this to your project .cursor/mcp.json (or the global ~/.cursor/mcp.json). Cursor opens the Files.fm sign-in when you first use the connector.

{
  "mcpServers": {
    "filesfm": {
      "url": "https://files.fm/mcp"
    }
  }
}

Add the server to ~/.codex/config.toml, then sign in with the login command.

[mcp_servers.filesfm]
url = "https://files.fm/mcp"

codex mcp login filesfm

Most MCP clients only need the server address and open the Files.fm sign-in automatically. Clients that cannot sign in can send a Files.fm API key in the Authorization header instead.

URL:  https://files.fm/mcp
Header (API key only):  Authorization: Bearer <user_id>:<api_token>

Full MCP connector reference

Authentication and production access

API access requires a Files.fm account and HTTPS. Depending on the integration, authentication can use supported API credentials or sign-in methods. For production use, higher limits, custom workflows, white-label integrations, or enterprise support, contact the Files.fm team with a short description of your use case.

API keys for the REST and DMS APIs are created in your account settings and are available on paid plans and business accounts. AI assistants connect through the MCP sign-in and do not need a key. Manage API keys

Contact Files.fm