Customjs

Learn how to use Customjs with Composio

Overview

SLUG: CUSTOMJS

Description

CustomJS is a code-first automation platform that enables seamless integration of custom JavaScript logic into various systems and technologies, allowing users to extend applications by writing functions for tasks like sending emails, generating PDFs, or updating CRM data fields.

Authentication Details

generic_api_key
stringRequired

Connecting to Customjs

Create an auth config

Use the dashboard to create an auth config for the Customjs toolkit. This allows you to connect multiple Customjs accounts to Composio for agents to use.

1

Select App

Navigate to Customjs.

2

Configure Auth Config Settings

Select among the supported auth schemes of and configure them here.

3

Create and Get auth config ID

Click “Create Customjs Auth Config”. After creation, copy the displayed ID starting with ac_. This is your auth config ID. This is not a sensitive ID — you can save it in environment variables or a database. This ID will be used to create connections to the toolkit for a given user.

Connect Your Account

Using API Key

1from composio import Composio
2
3# Replace these with your actual values
4customjs_auth_config_id = "ac_YOUR_CUSTOMJS_CONFIG_ID" # Auth config ID created above
5user_id = "0000-0000-0000" # UUID from database/app
6
7composio = Composio()
8
9def authenticate_toolkit(user_id: str, auth_config_id: str):
10 # Replace this with a method to retrieve an API key from the user.
11 # Or supply your own.
12 user_api_key = input("[!] Enter API key")
13
14 connection_request = composio.connected_accounts.initiate(
15 user_id=user_id,
16 auth_config_id=auth_config_id,
17 config={"auth_scheme": "API_KEY", "val": {"generic_api_key": user_api_key}}
18 )
19
20 # API Key authentication is immediate - no redirect needed
21 print(f"Successfully connected Customjs for user {user_id}")
22 print(f"Connection status: {connection_request.status}")
23
24 return connection_request.id
25
26
27connection_id = authenticate_toolkit(user_id, customjs_auth_config_id)
28
29# You can verify the connection using:
30connected_account = composio.connected_accounts.get(connection_id)
31print(f"Connected account: {connected_account}")

Tools

Executing tools

To prototype you can execute some tools to see the responses and working on the Customjs toolkit’s playground

Python
1from composio import Composio
2from openai import OpenAI
3import json
4
5openai = OpenAI()
6composio = Composio()
7
8# User ID must be a valid UUID format
9user_id = "0000-0000-0000" # Replace with actual user UUID from your database
10
11tools = composio.tools.get(user_id=user_id, toolkits=["CUSTOMJS"])
12
13print("[!] Tools:")
14print(json.dumps(tools))
15
16def invoke_llm(task = "What can you do?"):
17 completion = openai.chat.completions.create(
18 model="gpt-4o",
19 messages=[
20 {
21 "role": "user",
22 "content": task, # Your task here!
23 },
24 ],
25 tools=tools,
26 )
27
28 # Handle Result from tool call
29 result = composio.provider.handle_tool_calls(user_id=user_id, response=completion)
30 print(f"[!] Completion: {completion}")
31 print(f"[!] Tool call result: {result}")
32
33invoke_llm()

Tool List

Tool Name: Authenticate CustomJS API Key

Description

Tool to authenticate a CustomJS API key. Use when verifying a user's API key before making further requests.

Action Parameters

api_key
stringRequired

Action Response

data
objectRequired
error
string
successful
booleanRequired

Tool Name: Convert HTML to PDF

Description

Tool to convert HTML to a PDF document. Use when you need to generate a PDF from raw HTML. Returns raw PDF bytes suitable for download or storage.

Action Parameters

code
stringRequired
input
stringRequired
returnBinary
stringDefaults to true

Action Response

data
objectRequired
error
string
successful
booleanRequired

Tool Name: Convert HTML to PNG

Description

Tool to convert HTML string to PNG image. Use when you need a PNG from HTML after preparing your markup.

Action Parameters

html
stringRequired

Action Response

data
objectRequired
error
string
successful
booleanRequired

Tool Name: Capture webpage screenshot

Description

Tool to capture a screenshot of a webpage. Use when you need a visual snapshot of a URL.

Action Parameters

url
stringRequired

Action Response

data
objectRequired
error
string
successful
booleanRequired

Tool Name: Merge multiple PDFs into one

Description

Tool to merge multiple PDF files into a single PDF. Use when you have multiple PDF URLs and want one combined PDF.

Action Parameters

code
stringRequired
input
arrayRequired
returnBinary
stringRequired

Action Response

data
objectRequired
error
string
successful
booleanRequired

Tool Name: Run Puppeteer Script

Description

Tool to run a Puppeteer script and capture a screenshot. Use when automating headless browser tasks and needing a PNG output. Use after confirming the script logic.

Action Parameters

code
stringRequired
input
stringRequired
returnBinary
boolean

Action Response

data
objectRequired
error
string
successful
booleanRequired