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Studio Apps

editStudioAppFile

Edit Studio App File

Surgically edit one file in a Studio app by find-and-replace: patch it in place instead of re-uploading the whole file.

write

Ask Claude, ChatGPT, Cursor or any AI connected to The Cloud "change X to Y in index.html", and it calls editStudioAppFile.

Example call

The MCP tools/call params, with the required arguments only.

{
  "arguments": {
    "appId": "<appId>",
    "newString": "<newString>",
    "oldString": "<oldString>",
    "path": "<path>"
  },
  "name": "editStudioAppFile"
}

Arguments

• appIdstringrequiredThe Studio app ID
• exactAdminOnlybooleanoptionalOpt into the exact-edit rule: allowed only when you administer the app and oldString matches exactly once (no expectedCount above 1, file not emptied); otherwise refused with nothing written.
• expectedCountnumberoptionalWhen set, oldString must occur EXACTLY this many times and ALL occurrences are replaced. Omit to require a single unique match.
• newStringstringrequiredThe replacement text.
• oldStringstringrequiredThe exact current text to replace. Must match verbatim (whitespace included) and: unless expectedCount is set: occur exactly once.
• pathstringrequiredThe file path within the app to edit (e.g. 'index.html', 'style.css', 'app.js')
• requestIdstringoptionalOptional idempotency/trace key, echoed on coded errors. NOTE: a patch is not blindly retryable: once it lands, re-sending fails to match.

Returns

On zero matches or an ambiguous over-match the tool changes NOTHING and returns a precise error (the match count + surrounding context) so you can extend oldString or set expectedCount: it never…

Ask for it

The Cloud routes these requests to this verb.

• change X to Y in index.html
• fix the typo in app.js
• update the hero heading
• swap the logo src

Pair it with

The verbs that finish the job.

• readStudioAppFile
• editStudioAppFileBatch
• appendStudioAppFile

Questions

• What does editStudioAppFile do?

  Surgically edit one file in a Studio app by find-and-replace: patch it in place instead of re-uploading the whole file. It is one of the tools The Cloud MCP server gives every connected AI.

• How do I use editStudioAppFile from Claude or ChatGPT?

  Connect your AI to The Cloud at https://mcp.thecloud.so/mcp and sign in once. Then ask Claude, ChatGPT, Cursor or any AI connected to The Cloud "change X to Y in index.html", and it calls editStudioAppFile.

• Is editStudioAppFile safe to let an AI call?

  editStudioAppFile changes your workspace. What an AI creates is Private until you share it.

Connect

One endpoint gives your AI this tool and every other one: connect Claude, ChatGPT, Cursor or Gemini, read what The Cloud is, or see pricing.