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Filesystem

Sandboxed file management for your AI agent

11 tools available

Filesystem tools give your AI agent a private, sandboxed file system. Read, write, edit, move, search, and organize files — all within your isolated storage. No access to your local machine, no security risks.

This is the foundation for AI workflows that create and manage files: code generation, document creation, data processing, and any task that involves file I/O. Each user gets their own isolated storage space.

You can also generate signed public URLs for any file in your storage, making it easy to share AI-generated content with others — reports, visualizations, code snippets, or any file.

Benefits

Why use Filesystem?

✓ 10+ file operations: read, write, edit, move, search, list, tree, info, create dirs

✓ Generate shareable public URLs for any file

✓ Sandboxed per-user storage — complete isolation

✓ No access to your local filesystem — safe by design

✓ Supports any file type — text, code, data, images

✓ Persistent storage across sessions

Use Cases

What can you do?

Code generation

Have your AI generate code files, configurations, or scripts and save them for later retrieval.

Data processing

Upload data files, let your AI process them, and save the results to new files.

Document management

Create, organize, and edit documents across multiple AI sessions.

Share AI output

Generate signed public URLs to share AI-created reports, documents, or files with your team.

Your Endpoint

Connect with Filesystem

Use this URL to connect with only Filesystem + Environment Variables enabled.

MCP Endpoint

https://mcp.runtools.link/{YOUR_KEY}

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Tools

Filesystem Tools

filesystem_read_file

1 arg

Read the contents of a text file from your sandboxed filesystem. Paths are relative to your user sandbox root. Max file size: 10MB.

Arguments

Name	Type	Description
path	string	Relative path inside your sandbox (e.g. 'docs/readme.txt')	required

filesystem_read_multiple_files

1 arg

Read multiple files at once from your sandboxed filesystem. More efficient than reading one by one. Failed reads won't stop the whole operation.

Arguments

Name	Type	Description
paths	string[]	Array of relative file paths to read (max 20)	required

filesystem_write_file

2 args

Create or overwrite a file in your sandboxed filesystem. Parent directories are created automatically. Max content size: 10MB. Warning: overwrites existing files without confirmation.

Arguments

Name	Type	Description
path	string	Relative path inside your sandbox (e.g. 'docs/readme.txt')	required
content	string	Text content to write to the file	required

filesystem_edit_file

3 args

Make text replacements in a file. Each edit replaces an exact text match with new content. Use dryRun=true to preview changes without applying them.

Arguments

Name	Type	Description
path	string	Relative path inside your sandbox (e.g. 'docs/readme.txt')	required
edits	object[]	Array of find-and-replace edits	required
dryRun	boolean	If true, preview changes without applying them Default: `false`	optional

filesystem_create_directory

1 arg

Create a directory (and any parent directories) in your sandboxed filesystem. Succeeds silently if the directory already exists.

Arguments

Name	Type	Description
path	string	Relative path inside your sandbox (e.g. 'docs/readme.txt')	required

filesystem_list_directory

1 arg

List files and directories at a given path in your sandboxed filesystem. Results show [FILE] and [DIR] prefixes. Use path '/' or '' for root.

Arguments

Name	Type	Description
path	string	Relative path to list (default: root of your sandbox) Default: `"/"`	optional

filesystem_directory_tree

2 args

Get a recursive tree view of files and directories as JSON. Entries include name, type (file/directory), and children for directories. Max depth: 10 levels.

Arguments

Name	Type	Description
path	string	Relative path to start the tree (default: root) Default: `"/"`	optional
excludePatterns	string[]	Glob patterns to exclude (e.g. 'node_modules', '*.log') Default: `[]`	optional

filesystem_move_file

2 args

Move or rename a file or directory within your sandboxed filesystem. Fails if the destination already exists.

Arguments

Name	Type	Description
source	string	Source relative path	required
destination	string	Destination relative path	required

filesystem_search_files

3 args

Search for files matching a glob pattern in your sandboxed filesystem. Returns relative paths. Use '**/*.txt' for recursive search, '*.txt' for current directory only.

Arguments

Name	Type	Description
path	string	Starting directory (default: root) Default: `"/"`	optional
pattern	string	Glob pattern to match (e.g. '*/.ts', '*.json')	required
excludePatterns	string[]	Glob patterns to exclude Default: `[]`	optional

filesystem_get_file_info

1 arg

Get metadata about a file or directory: size, creation time, modification time, permissions, and type.

Arguments

Name	Type	Description
path	string	Relative path inside your sandbox (e.g. 'docs/readme.txt')	required

filesystem_generate_public_url

3 args

Save text or base64-encoded content to a public file and return a signed URL. Useful for sharing HTML pages, text files, JSON data, images, or any file publicly.

Arguments

Name	Type	Description
content	string	The content to save. Plain text by default, or base64-encoded binary data when encoding is 'base64'.	required
filename	string	File name with extension (e.g., 'report.html', 'data.json', 'image.png'). Only letters, numbers, spaces, dots, and slashes are allowed.	required
encoding	enum	Content encoding: 'utf-8' (default) for plain text, 'base64' for binary data like images or PDFs. Values: `utf-8` `base64`	optional

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