---
title: write_session_files
product: vercel
url: /docs/agent-resources/vercel-mcp/tools/sandboxes/write_session_files
canonical_url: "https://vercel.com/docs/agent-resources/vercel-mcp/tools/sandboxes/write_session_files"
last_updated: 2018-10-20
type: reference
prerequisites:
  - /docs/agent-resources/vercel-mcp/tools/sandboxes
  - /docs/agent-resources/vercel-mcp/tools
related:
  []
summary: Use write_session_files with Vercel MCP.
install_vercel_plugin: npx plugins add vercel/vercel-plugin
---

# write_session_files

Write files.

## Parameters

| Parameter     | Type   | Required | Description                                                                                                                             |
| ------------- | ------ | -------- | --------------------------------------------------------------------------------------------------------------------------------------- |
| `xCwd`        | string | No       | The target directory where the tarball contents will be extracted. If not specified, files are extracted to the sandbox home directory. |
| `sessionId`   | string | Yes      | The unique identifier of the session to write files to.                                                                                 |
| `teamId`      | string | No       | Team ID.                                                                                                                                |
| `slug`        | string | No       | Team slug.                                                                                                                              |
| `requestBody` | string | Yes      | A base64-encoded gzipped tarball to extract. Provide this binary value as a base64 string.                                              |


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