Clasp

Develop Apps Script projects locally using clasp (Command Line Apps Script Projects).

To get started, try out the codelab!

You can also try clasp in Gitpod, a one-click online IDE for GitHub:

Features

🗺️ Develop Locally: clasp allows you to develop your Apps Script projects locally. That means you can check-in your code into source control, collaborate with other developers, and use your favorite tools to develop Apps Script.

🔢 Manage Deployment Versions: Create, update, and view your multiple deployments of your project.

📁 Structure Code: clasp automatically converts your flat project on script.google.com into folders. For example:

• On script.google.com:
  • tests/slides.gs
  • tests/sheets.gs
• locally:
  • tests/
    • slides.js
    • sheets.js

➡️ Run Apps Script: Execute your Apps Script from the command line. Features:

• Instant deployment.
• Suggested functions Autocomplete (Fuzzy)
• Easily add custom Google OAuth scopes
• And more…

Install

First download clasp:

npm install -g @google/clasp

Then enable the Google Apps Script API: https://script.google.com/home/usersettings

Commands

The following command provide basic Apps Script project management.

Note: Most of them require you to clasp login and clasp create/clone before using the rest of the commands.

clasp

• clasp login [--no-localhost] [--creds <file>] [--redirect-port]
• clasp logout
• clasp create-script [--title <title>] [--type <type>] [--rootDir <dir>] [--parentId <id>]
• clasp clone-script <scriptId | scriptURL> [versionNumber] [--rootDir <dir>]
• clasp pull [--versionNumber]
• clasp push [--watch] [--force]
• clasp show-file-status [--json]
• clasp open-script
• clasp list-deployments
• clasp create-deployment [--versionNumber <version>] [--description <description>] [--deploymentId <id>]
• clasp delete-deployment [deploymentId] [--all]
• clasp create-version [description]
• clasp list-versions
• clasp list-scripts

Advanced Commands

NOTE: These commands require you to add your Project ID.

• clasp tail-logs [--json] [--open] [--setup] [--watch] [--simplified]
• clasp list-apis
• clasp enable-api<api>
• clasp disable-api <api>
• clasp run-function [function]

Guides

Migrating from 2.x to 3.x

Drop typescript support

Clasp no longer transpiles typescript code. For typescript projects, use typescript with a bundler like Rollup to transform code prior to pushing with clasp. This has the advantage of offering more robust support for Typescript features along with ESM module and NPM package support.

There are several template projects on GitHub that show how to transform Typescript code into Apps Script that are all excellent choices.

• https://github.com/WildH0g/apps-script-engine-template
• https://github.com/tomoyanakano/clasp-typescript-template
• https://github.com/google/aside
• https://github.com/sqrrrl/apps-script-typescript-rollup-starter

Command renames

Clasp 3.x introduces some breaking changes from 2.x. For common use cases these changes should not impact usage, but some lesser used commands have been restructured and renamed to improve consistency.

| 2.x | 3.x | |----------------------------|----------------------------------------| |open | open-script | |open --web | open-web-app | |open --addon | open-container | |open --creds | open-credentials-setup | |login --creds <file> | login -u <name> --creds <file> | |logs --open | open-logs | |logs --setup | N/A | |apis --open | open-api-console | |apis enable <api> | enable-api <api> | |apis disable <api> | disable-api <api> | |deploy -i <id> | update-deployment <id> | |settings | N/A |

Other commands have also been renamed but retain aliases for compatibility.

Authorization

Most command require user authorization. Run clasp login to authorize access to manage your scripts.

Multiple user support

Use the global --user option to switch between accounts. This supports both running clasp as different users as well as when invoking the clasp run-function command.

Examples:

clasp login # Saves as default credentials
clasp clone # User not specified, runs using default credentials
clasp login --user testaccount # Authorized new named credentials
clasp run-function --user testaccount myFunction # Runs function as test account

Bring your own project/credentials

While clasp includes a default OAuth client, using your own project is recommend and can improve security and compliance in environments that limit which third party applications users may authorize. To set up your own project:

1. Create a new project in the Google Cloud Developer Console.
2. Create an OAuth client. The client type must be Desktop Application. Download and save the generated client secrets file. This is required when authorizing using theclasp login --creds <filename> command.
3. Enable services. For full functionality, clasp requires the following:

• Apps Script API - script.googleapis.com (required)
• Service Usage API - serviceusage.googleapis.com (required to list/enable/disable APIs)
• Google Drive API - drive.googleapis.com (required to list scripts, create container-bound scripts)

• Cloud Logging API - logging.googleapis.com (required to read logs)

Note: If configuring the project for external use where OAuth scopes must be registered, include the following:

https://www.googleapis.com/auth/script.deployments
https://www.googleapis.com/auth/script.projects
https://www.googleapis.com/auth/script.webapp.deploy
https://www.googleapis.com/auth/drive.metadata.readonly
https://www.googleapis.com/auth/drive.file
https://www.googleapis.com/auth/service.management
https://www.googleapis.com/auth/logging.read
https://www.googleapis.com/auth/userinfo.email
https://www.googleapis.com/auth/userinfo.profile
https://www.googleapis.com/auth/cloud-platform

Allow-list clasp

If your organization restricts authorization for third-party apps, you may either:

• Request your admin allow-list clasp's client id 1072944905499-vm2v2i5dvn0a0d2o4ca36i1vge8cvbn0.apps.googleusercontent.com
• Set up an internal-only GCP project for clasp as described in the previous section.

Service accounts (EXPERIMENTAL/NOT WORKING)

Use the --adc option on any command to read credentials from the environment using Google Cloud's application default credentials mechanism.

Note that if using a service account, service accounts can not own scripts. To use a service account to push or pull files from Apps Script, the scripts must be shared with the service account with the appropriate role (e.g. Editor in able to push.)

Ignore File (.claspignore)

Like .gitignore, .claspignore allows you to ignore files that you do not wish to upload on clasp push. Steps:

1. Create a file called .claspignore in your project's root directory.
2. Add patterns to be excluded from clasp push. Note: The .claspignore patterns are applied by multimatch, which is different from .gitignore, especially for directories. To ignore a directory, use syntax like **/node_modules/**.

A sample .claspignore ignoring everything except the manifest and build/main.js:

**/**
!build/main.js
!appsscript.json

Note: The .claspignore patterns are applied relative from the rootDir.

If no .claspignore is specified, a default set of patterns is applied. This default set will only consider the appsscript.json manifest and any JavaScript, TypeScript and .html source files within the rootDir folder. Child folders other than .git and node_modules are processed.

# ignore all files…
**/**

# except the extensions…
!appsscript.json
!**/*.gs
!**/*.js
!**/*.ts
!**/*.html

# ignore even valid files if in…
.git/**
node_modules/**

Project Settings File (.clasp.json)

When running clone or create, a file named .clasp.json is created in the current directory to describe clasp's configuration for the current project. Example .clasp.json:

{
  "scriptId": "",
  "rootDir": "build/",
  "projectId": "project-id-xxxxxxxxxxxxxxxxxxx",
  "fileExtension": "ts",
  "filePushOrder": ["file1.ts", "file2.ts"]
}

The following configuration values can be used:

scriptId (required)

Specifies the id of the Google Script project that clasp will target.

1. Open script url.
2. File > Project properties > Script ID

rootDir (optional)

Specifies the local directory in which clasp will store your project files. If not specified, clasp will default to the current directory.

projectId (optional)

Specifies the id of the Google Cloud Platform project that clasp will target. You must associate Google Script project with Google Cloud Platform beforehand.

1. Run clasp open.
2. Click Resources > Cloud Platform project....
3. Specify the project ID project-id-xxxxxxxxxxxxxxxxxxx.

Even if you do not set this manually, clasp will ask this via a prompt to you at the required time.

fileExtension (deprecated, optional)

Specifies the file extension for local script files in your Apps Script project.

scriptExtensions (optional)

Specifies the file extensions for local script files in your Apps Script project. May be a string or array of strings. Files matching the extension will be considered scripts files.

When pulling files, the first extension listed is used to write files.

Defaults to [".js", ".gs"]

htmlExtensions (optional)

Specifies the file extensions for local HTML files in your Apps Script project. May be a string or array of strings. Files matching the extension will be considered HTML files.

When pulling files, the first extension listed is used to write files.

Defaults to [".html"]

filePushOrder (optional)

Specifies the files that should be pushed first, useful for scripts that rely on order of execution. All other files are pushed after this list of files, sorted by name.

Note that file paths are relative to directory containing .clasp.json. If rootDir is also set, any files listed should include that path as well.

skipSubdirectories (optional)

For backwards compatibility with previous behavior where subdirectories are ignored if a .claspignore file is not present. Clasp provides default ignore rules, making the previous warning and behavior confusing. If you need to force clasp to ignore subdirectories and do not want to construct a .claspignore file, set this option to true.

Reference

Global options

• --user <name>: Uses credentials stored under the named key. When omitted, the default user is used.
• --adc: Uses application default credentials from the environment. Intended to support service accounts in CI workflows.
• --project <file>: Reads project settings from a file other than .clasp.json. Intended to support multiple deployment targets.
• --auth <file>: (DEPRECATED) Reads credentials from a file other than .clasprc.json. Use the --user option to maintain multiple authorized accounts.
• --ignore <file>: Reads ignore patterns from a file other than .claspignore.

Login

Logs the user in. Saves the client credentials to a .clasprc.json file in the user's home directory

Options

• --no-localhost: Do not run a local server, manually enter code instead.
• --creds <file>: Use custom credentials used for clasp run. Saves a .clasprc.json file to current working directory. This file should be private!
• --redirect-port <port>: Specify a custom port for the local redirect server during the login process. Useful for environments where a specific port is required.

Examples

• clasp login
• clasp login --no-localhost
• clasp login --user test-user --creds client_secret.json
• clasp login --redirect-port 37473

Logout

Logs out the user by deleting client credentials.

Examples

• clasp logout

Create

Creates a new script project. Prompts the user for the script type if not specified.

Options

• --type [docs/sheets/slides/forms]: If specified, creates a new add-on attached to a Document, Spreadsheet, Presentation, or Form. If --parentId is specified, this value is ignored.
• --title <title>: A project title.
• --rootDir <dir>: Local directory in which clasp will store your project files. If not specified, clasp will default to the current directory.
• --parentId <id>: A project parent Id.
  • The Drive ID of a parent file that the created script project is bound to. This is usually the ID of a Google Doc, Google Sheet, Google Form, or Google Slides file. If not set, a standalone script project is created.
  • i.e. https://docs.google.com/presentation/d/{id}/edit

Examples

• clasp create-script
• clasp create-script --type standalone (default)
• clasp create-script --type docs
• clasp create-script --type sheets
• clasp create-script --type slides
• clasp create-script --type forms
• clasp create-script --type webapp
• clasp create-script --type api
• clasp create-script --title "My Script"
• clasp create-script --rootDir ./dist
• clasp create-script --parentId "1D_Gxyv*****************************NXO7o"

These options can be combined like so:

• clasp create-script --title "My Script" --parentId "1D_Gxyv*****************************NXO7o" --rootDir ./dist

Clone

Clones the script project from script.google.com.

Options

• scriptId | scriptURL: The script ID or script URL to clone.
• --versionNumber <number>: The version of the script to clone.
• --rootDir <dir>: Local directory in which clasp will store your project files. If not specified, clasp will default to the current directory.

Examples

• clasp clone-script "15ImUCpyi1Jsd8yF8Z6wey_7cw793CymWTLxOqwMka3P1CzE5hQun6qiC"
• clasp clone-script "https://script.google.com/d/15ImUCpyi1Jsd8yF8Z6wey_7cw793CymWTLxOqwMka3P1CzE5hQun6qiC/edit"
• clasp clone-script "15ImUCpyi1Jsd8yF8Z6wey_7cw793CymWTLxOqwMka3P1CzE5hQun6qiC" --rootDir ./src

Pull

Fetches a project from either a provided or saved script ID. Updates local files with Apps Script project.

Options

• --versionNumber <number>: The version number of the project to retrieve.
• --deleteUnusedFiles: Deletes local files that would have been pushed that were not returned by the server. Prompts for confirmation
• --force: Used with --deleteUnusedFiles to automatically confirm. Use with caution.

Examples

• clasp pull
• clasp pull --versionNumber 23

Push

Force writes all local files to script.google.com.

Warning: Google scripts APIs do not currently support atomic nor per file operations. Thus the push command always replaces the whole content of the online project with the files being pushed.

Ignores files:

• That start with a .
• That don't have an accepted file extension
• That are ignored (filename matches a glob pattern in the .claspignore file)

Options

• -f --force: Forcibly overwrites the remote manifest.
• -w --watch: Watches local file changes. Pushes files every few seconds.

Examples

• clasp push
• clasp push -f
• clasp push --watch

Status

Lists files that will be written to the server on push.

Ignores files:

• That start with a .
• That don't have an accepted file extension
• That are ignored (filename matches a glob pattern in the ignore file)

Options

• --json: Show status in JSON form.

Examples

• clasp show-file-status
• clasp show-file-status --json

Open

Clasp offers several commands to opens the current directory's clasp project and related resources.

Examples

• clasp open-script
• clasp open-web-app
• clasp open-container
• clasp open-credentials-setup

Deployments

List deployments of a script.

Examples

• clasp list-deployments

Deploy

Creates a version and deploys a script. The response gives the deployment ID and the version of the deployment.

For web apps, each deployment has a unique URL. To update/redeploy an existing deployment, provide the deployment ID.

Options

• -V <version> --versionNumber <version>: The project version to deploy at.
• -d <description> --description <description>: The deployment description.
• -i <id> --deploymentId <id>: The deployment ID to redeploy.

Examples

• clasp create-deployment (create new deployment and new version)
• clasp create-deployment --versionNumber 4 (create new deployment)
• clasp create-deployment --description "Updates sidebar logo." (deploy with description)
• clasp create-deployment --deploymentId abcd1234 (redeploy and create new version)
• clasp create-deployment -V 7 -d "Updates sidebar logo." -i abdc1234

Redeploy

Updates an existing deployment. Same as create-deployment -i id.

Options

• -V <version> --versionNumber <version>: The project version to deploy at.
• -d <description> --description <description>: The deployment description.

Examples

• clasp update-deployment abcd1234 (redeploy and create new version)

Undeploy

Undeploys a deployment of a script.

Options

• [deploymentId]: An optional deployment ID.
• -a --all: Undeploy all deployments.

Examples

• clasp delete-deployment (prompts for deployment or deletes if only one)
• clasp delete-deployment "123"
• clasp delete-deployment --all

Version

Creates an immutable version of the script.

Options

• description: description The description of the script version.

Examples

• clasp create-version
• clasp create-version "Bump the version."

Versions

List versions of a script.

Examples

• clasp list-versions

List

Lists your most recent Apps Script projects.

Examples

• clasp list-scripts: Prints helloworld1 – xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx ...

MCP (EXPERIMENTAL)

Runs clasp in MCP (model context protocol) mode for use with coding agents. Configure clasp as a local tool using STDIO transport. While running in MCP mode clasp uses the same credentials as normal when used as a CLI. Run clasp login ahead of time to authorize.

When used in MCP mode clasp does not need to be started from the project directory. The project directoy is specified in the tool calls. Switching projects does not require a restart of the MCP server, while switching credentials does.

This feature is experimental and currently offers a limited subset of tools for agents. Feedback is welcome.

Options

N/A

Examples

• clasp mcp

Advanced Commands

NOTE: These commands require Project ID/credentials setup (see below).

Logs

Prints out most recent the StackDriver logs. These are logs from console.log, not Logger.log.

Options

• --json: Output logs in json format.
• --watch: Retrieves the newest logs every 5 seconds.
• --simplified: Removes timestamps from the logs.

Examples

clasp logs
ERROR Sat Apr 07 2019 10:58:31 GMT-0700 (PDT) myFunction      my log error
INFO  Sat Apr 07 2019 10:58:31 GMT-0700 (PDT) myFunction      info message

• clasp logs --json
• clasp logs --watch
• clasp logs --simplified

Run

Remotely executes an Apps Script function.

The complete step-by-step information on how to use clasp run is available here: Run Below is a short summary:

1. Log in with your credentials (clasp login --creds creds.json), see: Run - Prerequisites
2. Deploy the Script as an API executable (Easiest done via GUI at the moment).
3. Enable any APIs that are used by the script, see: Run - Function with Scopes
4. Have the following in your appsscript.json. Be sure it's pushed:

"executionApi": {
  "access": "ANYONE"
}

Options

• <functionName>: The name of the function in the script that you want to run.
• --nondev: If true, runs the function in non-devMode.
• -p <paramString> --params <paramString>: A JSON string array of parameters to pass to the function

Examples

• clasp run-function 'sendEmail'
• clasp run-function 'addOptions' -p '["string", 123, {"test": "for"}, true]'

List/Enable/Disable Google APIs

List available APIs. Enables and disables Google APIs.

List APIs

Lists Google APIs that can be enabled as Advanced Services.

• clasp list-apis
• clasp list-apis

Enable/Disable APIs

Enables or disables APIs with the Google Cloud project. These APIs are used via services like GmailApp and Advanced Services like BigQuery.

The API name can be found using clasp apis list.

• clasp enable-api drive
• clasp disable-api drive

Open APIs Console

Open the Google Cloud Console where you can view and manage API access.

• clasp open-api-console

Help

Displays the help function.

Examples

• clasp
• clasp help

Clasp Run

NOTE: This command requires you to bring your own Google API credentials.

• clasp run-function [functionName] [--nondev] [--params <StringArray>]

Troubleshooting

NodeJS Version

The library requires NodeJS version >= 22.0.0.

You can check your version of NodeJS with this command.

node -v

You can use these commands to upgrade NodeJS if necessary (not on Windows):

npm install -g npm # Update npm and npx
npx n latest # use the n package to update node

Debugging & filing issues

Clasp uses the debug library for internal logging. If you encounter an issue and want to file a bug report, please include a log with debugging enabled. Enable debugging by setting the envionment variable DEBUG=clasp:*

Example:

DEBUG=clasp:* clasp pull # Runs clasp with verbose debug output

Using a Proxy

Clasp supports proxies via the Google APIs Node Module. See "Using a Proxy" and this discussion for details on how to use the proxy. This requires using the environment variables HTTP_PROXY / HTTPS_PROXY.

README Badge

Using clasp for your project? Add a README badge to show it off:

[![clasp](https://img.shields.io/badge/built%20with-clasp-4285f4.svg)](https://github.com/google/clasp)

Develop clasp

See the develop guide for instructions on how to build clasp. It's not that hard!

Contributing

The main purpose of this tool is to enable local Apps Script development. If you have a core feature or use-case you'd like to see, find a GitHub issue or create a detailed proposal of the use-case. PRs are very welcome! See the issues (especially good first issue and help wanted).

⚡ Powered by the Apps Script API.