Use Fastio in ChatGPT and Codex

The Fastio plugin lets ChatGPT and Codex search your files, quote passages from documents, and manage workspaces, folders, shares and members, using your own Fastio account.

Install plugin Setup guide

Opens the Fastio listing in the ChatGPT plugin directory.

Acme MSA notice period

Fastio What does the Acme MSA say about the termination notice period?

Activity

Searched Fastio, read a file

From Acme Master Services Agreement.pdf, Section 12.2:

Either party may terminate this Agreement for convenience by giving the other party sixty (60) days' written notice.

So the notice period is 60 days, and the notice has to be in writing.

Work with ChatGPT

Install the Fastio plugin to try this in ChatGPT. Install plugin

Fastio What does the Acme MSA say about the termination notice period?

Activity

Searched Fastio, read a file

From Acme Master Services Agreement.pdf, Section 12.2:

Either party may terminate this Agreement for convenience by giving the other party sixty (60) days' written notice.

So the notice period is 60 days, and the notice has to be in writing.

Work with ChatGPT

Install plugin

Try these prompts. The examples from the Fastio listing. Use your own workspace and file names.

Install the plugin, then just ask

ChatGPT and Codex share one plugin directory. Install Fastio where you work, sign in, and mention it in a chat.

In ChatGPT

1

Find Fastio under Plugins in the ChatGPT sidebar.
2

Select Install plugin.
3

Select Connect, then sign in to Fastio in the window that opens and approve access.
4

Type @Fastio in a chat and ask about your files.

Open the Fastio listing

Fastio

Files, workspaces, AI search

Install plugin

@Fastio Search my Finance workspace for the Q3 budget report.

@Fastio What does the Acme MSA say about the termination notice period?

@Fastio Who are the members of my Legal workspace?

Fastio is a workspace and file-storage platform for teams. This app connects a signed-in Fastio account to ChatGPT: browse and search workspaces and files, read file text and metadata, organize folders, upload files, manage branded shares, read and add comments, and manage workspace and share members.

Sign-in uses OAuth in the browser; the app acts with the permissions of the signed-in account. No tool accepts a password, API key or verification code, and no tool returns one.

Each operation is its own tool (for example storage_search, storage_create_folder, share_create). Read tools only retrieve data. Tools that change data are marked as writes, and tools that delete or overwrite data are marked destructive, so ChatGPT can ask the user before running them.

Search finds files by keyword or semantic match within one workspace or share and returns ranked results with short excerpts; a separate tool returns a quoted passage from a specific file.

The app does not display plans, start subscriptions or handle payments.

App

Fastio

Files, workspaces, AI search

@Fastio Search my Finance workspace for the Q3 budget report.

@Fastio What does the Acme MSA say about the termination notice period?

@Fastio Who are the members of my Legal workspace?

Install plugin

Codex in the ChatGPT desktop app

1

Open the Plugins tab in the ChatGPT desktop app.
2

Find Fastio and select Install plugin.
3

Sign in to Fastio in the window that opens and approve access.
4

Type @Fastio in a new Codex chat, or just ask about your files.

Plugins Settings Fastio

Fastio

Files, workspaces, AI search

Try now

Fastio Search my Finance workspace for the Q3 budget report.

Fastio What does the Acme MSA say about the termination notice period?

Fastio Who are the members of my Legal workspace?

Sign-in uses OAuth in the browser; the app acts with the permissions of the signed-in account. No tool accepts a password, API key or verification code, and no tool returns one.

Search finds files by keyword or semantic match within one workspace or share and returns ranked results with short excerpts; a separate tool returns a quoted passage from a specific file.

The app does not display plans, start subscriptions or handle payments.

Apps 1

Fastio Fastio is a workspace and file-storage platform for teams. This app connects a signed-in Fastio account to ChatGPT: browse and search workspaces and files, read file text and metadata, organize folders, upload files, manage branded shares, read and add comments, and manage workspace and share members.

Codex CLI

Run /plugins inside Codex and install Fastio, or run this command. Then start a new session.

codex plugin add fast-io@openai-curated-remote

The Codex IDE extension does not support plugins.

Create, move and share from a chat

The plugin does more than search. Ask it to share a folder, move files into a new folder or leave a comment, and it makes the change in your workspace.

What the plugin can do

The plugin works with your own Fastio account and reaches only the workspaces you allow when you sign in.

Search files

Search a workspace or share by keyword or by meaning, with a short excerpt from each match.
Quote passages

Pull the exact passage from a document so you can see the text an answer rests on.
Browse workspaces

Browse workspaces, folders and files, and read a file's text and details.
Organize files

Create, move, rename and delete files and folders. Deleted items go to the workspace trash and can be restored.
Upload and import

Upload a file, or import one from a web address.
Branded shares

Create, update and delete branded shares for the people you work with.
Comments

Read the comments on a file and add your own.
Members

List, add and remove the members of a workspace or a share.
Metadata

Read a file's metadata and set metadata values.

Connect a custom MCP server instead

Use a custom MCP server when Fastio is not listed under Plugins for you, your workspace does not allow directory plugins, or you want to set the address yourself. ChatGPT and Codex both use this address.

https://mcp.fast.io/mcp/operations

Claude, Cursor and other clients use their own addresses, listed in the Fastio MCP setup guide (opens in a new tab).

ChatGPT in developer mode connects to the address directly.

1

In ChatGPT, open Settings → Security and login and turn on Developer mode. Availability can depend on your workspace's policy.
2

Go to chatgpt.com/plugins and select the plus button.
3

Name it Fastio, enter https://mcp.fast.io/mcp/operations as the MCP server URL, and create the connection.
4

Sign in to Fastio when prompted.

When you sign in through a custom MCP server, Fastio's Review Permissions screen lets you choose Read Only or Read & Write and which organizations and workspaces the connection can reach.

Add Fastio as a custom MCP server for Codex in the ChatGPT desktop app.

1

In the ChatGPT desktop app, select your profile icon in the bottom-left corner, then select Settings.
2

In Settings, select MCP servers.
3

Select Add server.
4

Enter the name below and choose Streamable HTTP.

Fastio
5

Paste this address into the URL field and leave Bearer token env var blank. Select Save, then Restart.

https://mcp.fast.io/mcp/operations
6

Fastio now appears in the server list. Select Authenticate to sign in.
7

Fastio opens its Review Permissions screen in your browser. Choose Read Only or Read & Write and which organizations and workspaces the connection can reach, then select Continue.
8

Check that the Fastio account shown is the one you want, then select Approve.
9

When the browser says authentication is complete, close the window and return to the ChatGPT desktop app.
10

Type /mcp in the composer to see your connected servers, or ask "Which Fastio workspaces can you see?"

Add Fastio to the Codex CLI with one command.

1
Open your terminal and run the command below. Codex detects that the server uses OAuth and starts the sign-in in your browser. If it does not, run codex mcp login fastio.

codex mcp add fastio --url https://mcp.fast.io/mcp/operations

Or add these lines to ~/.codex/config.toml, then run codex mcp login fastio to sign in.
```
[mcp_servers.fastio]
url = "https://mcp.fast.io/mcp/operations"
```
On a machine without a browser, run the command below. Open the link it prints in a browser, sign in to Fastio and approve access, then paste the URL the browser ends on back into the waiting terminal.
codex mcp login fastio --no-browser
2

Fastio opens its Review Permissions screen in your browser. Choose Read Only or Read & Write and which organizations and workspaces the connection can reach, then select Continue.
3

Check that the Fastio account shown is the one you want, then select Approve.
4

When the browser says authentication is complete, close the window and return to the terminal.
5

Run the command below to start Codex.

codex
6

Type the command below and press Enter to list your configured MCP servers.

/mcp
7

The fastio server should appear with Auth: OAuth. Ask something like "Which Fastio workspaces can you see?" to confirm it can reach your workspaces.

Try these prompts

Copy and paste these into Codex to see Fastio in action.

List all workspaces in this account

Create a new folder named "Images"

Give me a link to this newly created folder

Fastio CLI

The Fastio CLI is also available as a standalone tool for Codex and ChatGPT workflows. It gives you the same workspace tools (upload, search, share) as a standalone command, and includes a built-in MCP server via fastio mcp.

npm install --global @vividengine/fastio-cli

Learn more llms.txt skill.md

Troubleshooting

Fastio is not listed under Plugins

Whether a plugin can be installed depends on your plan, region and workspace. In Codex, changes to the plugin directory can take up to 6 hours to appear. You can also connect a custom MCP server instead.

ChatGPT says the plugin is disabled by an admin

Your workspace admin decides which plugins members can install. Ask them to allow Fastio.

Fastio is connected to the wrong account

Disconnect Fastio in ChatGPT under Settings, then Plugins. Connect again and sign in with the Fastio account that holds your workspaces.

Search finds file names but not what's inside them

Content search needs Intelligence turned on for the workspace. In Fastio, open the workspace's settings, go to the Intelligence tab and turn on Intelligence. New files are searchable once they have been processed.

FAQ

What is the Fastio plugin?

It connects your Fastio account to ChatGPT and Codex. From a chat you can browse and search your workspaces, read file text and metadata, organize folders, upload files, manage branded shares, read and add comments, and manage workspace and share members.

How do I install the Fastio plugin in ChatGPT?

Find Fastio under Plugins in the ChatGPT sidebar, or open the Fastio listing in the plugin directory, and select Install plugin. Select Connect and sign in to Fastio. Then type @Fastio in a chat and ask about your files.

Can I use the Fastio plugin in Codex?

Yes. ChatGPT and Codex share one plugin directory. In Codex in the ChatGPT desktop app, open the Plugins tab and install Fastio. In the Codex CLI, run /plugins and install Fastio, or run codex plugin add fast-io@openai-curated-remote, then start a new session. The Codex IDE extension does not support plugins.

Do I need developer mode to use Fastio in ChatGPT?

No. The plugin installs from the ChatGPT plugin directory. Developer mode is only needed if you connect Fastio as a custom MCP server at https://mcp.fast.io/mcp/operations instead.

How does sign-in work?

Sign in to Fastio in the window that opens and approve access. The plugin acts with your Fastio account's permissions, and no tool accepts or returns a password, API key or verification code.

What does the ChatGPT app leave out?

E-signature requests, managing pending invitations, profile updates and workspace AI chat are not part of the ChatGPT app. Connect Claude or a coding agent to Fastio for those. The app also does not handle billing or payments.

Will ChatGPT ask before it changes or deletes my files?

Tools that only read are labeled read-only. Tools that create, change or delete data are labeled as such, so ChatGPT can ask you before running them. Deleted files and folders go to the workspace trash and can be restored.

How do I disconnect Fastio?

In ChatGPT, open Settings, then Plugins, select Fastio and choose Disconnect. That removes the connection to your Fastio account. Uninstall plugin, where it is offered, removes the plugin itself but does not disconnect a connected account on its own. In Fastio, open Settings, then Devices & Agents, then Connected Devices, and select Revoke on the connection.

Can I see what ChatGPT uploads?

Yes. Everything ChatGPT stores is accessible at app.fast.io. You can browse, preview, comment on, and download files from any device.

Can ChatGPT share files with people who don't use ChatGPT?

Yes. Share links are regular web URLs. Recipients open them in a browser and get previews, downloads, and commenting features without needing an account.

Once ChatGPT is connected

Connecting is the first step. Here is what the workspace behind it does.

Works with Your Agent

A consolidated MCP toolset, persistent files, and somewhere for your agent to put its output.

Learn more

Ripley AI

Search everything stored, chat with documents, and get summaries without opening a file.

Learn more

Secure Workspaces

Org-owned shared spaces with granular permissions and per-file version history.

Learn more

Cloud Import

Bring existing files in from Google Drive, Dropbox, OneDrive, Box, or any public URL.

Learn more

Customizable Shares

Hand finished work to clients through links or branded portals. No account needed to open one.

Learn more

Company Brain

Cited answers drawn from the documents your organization already has.

Learn more

Bring your Fastio workspaces into ChatGPT and Codex

Install the Fastio plugin and work with your workspace files from a chat: search them, organize them, and share them with your team.

Install plugin Create a Fastio account

A real person can help with setup.

Use Fastio in ChatGPT and Codex

Install the plugin, then just ask

In ChatGPT

Codex in the ChatGPT desktop app

Codex CLI

Create, move and share from a chat

What the plugin can do

Search files

Quote passages

Browse workspaces

Organize files

Upload and import

Branded shares

Comments

Members

Metadata

Connect a custom MCP server instead

Try these prompts

Fastio CLI

Troubleshooting

FAQ

Once ChatGPT is connected

Works with Your Agent

Ripley AI

Secure Workspaces

Cloud Import

Customizable Shares

Company Brain

Bring your Fastio workspaces into ChatGPT and Codex