> ## Documentation Index
> Fetch the complete documentation index at: https://apidocs.scripe.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Session capacity

# `session_capacity`

| HTTP | When                                               |
| ---- | -------------------------------------------------- |
| 503  | **Reserved.** No endpoint returns this code today. |

This code is registered so the envelope contract and its `docs_url`
anchor stay stable, but nothing emits it. The MCP server caps a
workspace at 100 concurrent sessions and enforces that by **evicting
the oldest session** rather than refusing the new one, so the caller
that hits the cap gets a normal successful response — it's an older
session elsewhere that is dropped. Do not write retry logic against
this code.

If sessions are being evicted under you, the fix is not a retry: audit
how many MCP hosts are connected to the workspace and disconnect the
ones you don't need (**Settings → Developer → Connected apps**).