Filesystem access for AI assistants with fast reading and writing, chunked reading of large files and directory operations.
Setup
Choose your client, copy the config, then fill in any required environment variables.
claude mcp add fast-filesystem --env CREATE_BACKUP_FILES='<CREATE_BACKUP_FILES>' -- npx -y fast-filesystem-mcp~/.codex/config.toml
[mcp_servers.fast-filesystem]
command = "npx"
args = ["-y", "fast-filesystem-mcp"]
env = { CREATE_BACKUP_FILES = "<CREATE_BACKUP_FILES>" }
# codex mcp add fast-filesystem --env CREATE_BACKUP_FILES='<CREATE_BACKUP_FILES>' -- npx -y fast-filesystem-mcp~/.cursor/mcp.json
{
"mcpServers": {
"fast-filesystem": {
"command": "npx",
"args": [
"-y",
"fast-filesystem-mcp"
],
"env": {
"CREATE_BACKUP_FILES": "<CREATE_BACKUP_FILES>"
}
}
}
}.vscode/mcp.json
{
"servers": {
"fast-filesystem": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"fast-filesystem-mcp"
],
"env": {
"CREATE_BACKUP_FILES": "<CREATE_BACKUP_FILES>"
}
}
}
}~/.gemini/settings.json
{
"mcpServers": {
"fast-filesystem": {
"command": "npx",
"args": [
"-y",
"fast-filesystem-mcp"
],
"env": {
"CREATE_BACKUP_FILES": "<CREATE_BACKUP_FILES>"
}
}
}
}claude_desktop_config.json
{
"mcpServers": {
"fast-filesystem": {
"command": "npx",
"args": [
"-y",
"fast-filesystem-mcp"
],
"env": {
"CREATE_BACKUP_FILES": "<CREATE_BACKUP_FILES>"
}
}
}
}.trae/mcp.json
{
"mcpServers": {
"fast-filesystem": {
"command": "npx",
"args": [
"-y",
"fast-filesystem-mcp"
],
"env": {
"CREATE_BACKUP_FILES": "<CREATE_BACKUP_FILES>"
}
}
}
}Environment variables
CREATE_BACKUP_FILES
Replace the placeholders with your own credentials and keep them out of version control.