Limits

This page lists the limits that are the same on every plan. How many computers and custom domains an account gets, and each computer’s memory and storage, depend on the plan. Billing lists those numbers. Backup retention and counts per plan are on Backups and Reset.

Computers

Limit	Value
Address	<name>.rtsy.dev, where <name> is the computer’s slug
Slug length	3 to 32 characters
Slug characters	lowercase a–z, 0–9 and single -, not at the start or end
CPUs per computer	8 vCPUs
Computers created per rolling 24 hours	twice the plan’s computer count, and at least 10. Deleted computers count. A refused create says when you can try again.

Some slugs are reserved and can’t be used, including any slug that contains rootsy.

Requests to your apps

These apply to requests that reach your computer at its address or at a custom domain.

Limit	Value
Time to first response headers, GET and HEAD	15 seconds, including any wake
Time to connect to your app	5 seconds
Longest wait between two reads from your app	90 seconds
Longest wait between two writes to your app	90 seconds
Request body size	1,048,576 bytes (1 MiB), counting multipart framing
WebSocket upgrades	not passed through
Paths /_iw and under /_iw/	always 404. Your app never sees them.

When a GET or HEAD gets no response headers within 15 seconds, the visitor gets a 503 page with Retry-After: 60. Other methods have no header deadline, but still hit the 90-second read limit. Your nginx’s own default proxy_read_timeout is 60 seconds, so a proxied app gets 60 seconds unless its location sets proxy_read_timeout 90s;. A larger request body usually gets 413, and a much larger one can fail as a dropped connection. When your app returns 502, 503 or 504, or isn’t running, visitors get a Rootsy 503 page instead of your response. Rootsy never retries a request to your app.

Your apps sit behind your nginx on port 8090. See Serve an app.

Ports inside a computer

These ports belong to Rootsy. Don’t listen on them, stop what’s on them, or change their configuration:

Port	Use
7681–7687	terminal, platform auth, uploads, the Files window, preview control, the terminal relay and MCP commands
8080	the platform’s web server that every request passes through
8081	the code editor

Port 8090 is your nginx, the web server for your apps. Add config to it, but keep it on that port. Run your own app servers on any other port and proxy to them from 8090. Your computer lists each port.

Outbound network

Limit	Value
TCP port 25 (SMTP)	blocked, for the computer and its Docker containers, over IPv4 and IPv6
Other outbound connections	open

Scheduled tasks

Limit	Value
Schedules per computer	20
Shortest interval	1 minute
Methods	GET, POST
Path length	512 characters, starting with /, with no query string
Payload	64 KiB of valid JSON, POST only
Name length	100 characters
When value length	500 characters
Response deadline	90 seconds. Your nginx stops at 60 unless the server block sets proxy_read_timeout 90s;.
Retries	none
Run now	1 per minute and 10 per hour, per computer
Changes	60 per minute, per computer
History kept	30 days, up to 10,000 requests per schedule
Request ID reuse window	24 hours
Signed request age	at most 120 seconds old, at most 5 seconds in the future

When several runs are overdue, only the latest is sent, and only within 5 minutes of its time. See Scheduled tasks.

MCP

Limit	Value
One MCP request	524,288 bytes (512 KiB)
Page size for list_accounts and list_computers	1 to 100, default 50
Command script	16,384 bytes
Working directory path	4,096 bytes
Command time limit	default 300 seconds, at most 900 seconds
Commands running at once, per computer	4. A command started past that never runs.
Command output returned	last 1,000 journal records, then at most 65,536 bytes
Finished command results kept	24 hours. A computer holds at most 1,000 results, running ones included. Past that, new commands don’t start.
File moved by import_file or export_file	1 to 262,144 bytes
File path	4,096 bytes
Time for one file call	60 seconds
Imports in progress, per computer	4
Import receipts kept	256 per computer, 2,048 per account
Time for one domain change	75 seconds

A command’s time limit is also cut to what the account’s Runtime Credits can fund. See Connect with MCP.

Uploads and downloads

Limit	Value
File dropped on the terminal	100 MiB each, up to 20 files at a time
File uploaded in the Files window	10 GiB each
Free disk space a Files upload must leave	2 GiB
Unfinished Files uploads	deleted after 7 days without activity
Download size	no limit
Entries shown in one folder	2,000
Items in one Download selection	2,000
File or folder name	255 bytes

Files dropped on the terminal land in ~/uploads.

Backups

Limit	Value
Manual backups	1 per minute
Restores	10 per 24 hours, at least 5 minutes apart, failed attempts included
Backup note	200 characters
Return points	the newest 3 that can be restored

How long backups are kept, and how many manual and pinned backups a computer can hold, depend on the plan. Backups and Reset lists them.

Custom domains

Limit	Value
Hostname length	253 characters
Labels in a hostname	6 at most
Internationalized (xn--) names	not supported
Time to connect before a domain expires	7 days
Time over the plan’s domain limit before the newest domains detach	24 hours

A root domain and its www count as one custom domain. Domains are counted across the account. See Domains.

Storage

Limit	Value
What counts	everything on the disk except the platform’s first 4 GB
Over the plan’s limit	Terminal, Editor, uploads and MCP commands pause until the computer is back under 95% of the limit

See Billing.

Organizations

Limit	Value
Organizations you can create	3
Organizations you can belong to	10
Organization name	1 to 100 characters
Invitations	10 per hour, per member, per organization
Invitation link	expires after 7 days

See Organizations.