How to connect OneSimpleAPI to Claude Cowork

Cowork is Anthropic's AI agent for knowledge work. Think of it as Claude Code for everything else. It works autonomously with your computer, local files, and applications to accomplish complex tasks. This guide walks you through the easiest and most secure way to connect your OneSimpleAPI account to Cowork via Composio Connect, enabling it to generate QR code for checkout page, convert landing page into PDF, validate signup emails before import, and more such actions on your behalf without compromising your account security.

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OneSimpleAPI is a utility API platform for web content, images, PDFs, QR codes, URL tools, validation, exchange rates, and file management. It gives developers one simple API key for many common backend tasks.

15 Tools

Introduction

Cowork is Anthropic's AI agent for knowledge work. Think of it as Claude Code for everything else. It works autonomously with your computer, local files, and applications to accomplish complex tasks.

This guide walks you through the easiest and most secure way to connect your OneSimpleAPI account to Cowork via Composio Connect, enabling it to generate QR code for checkout page, convert landing page into PDF, validate signup emails before import, and more such actions on your behalf without compromising your account security.

Also integrate OneSimpleAPI with

OpenAI Agents SDKClaude Agent SDKClaude CodeCodexOpenClawHermesCLIGoogle ADKLangChainVercel AI SDKMastra AILlamaIndexCrewAI

Connecting OneSimpleAPI to Claude Cowork

1. Open Customize

In Claude Desktop, click Customize in the left sidebar, then select Connectors and click the + icon at the top.

Claude Desktop connectors screen with Add custom connector selected

2. Add the Composio MCP server

Click Add custom connector and paste in the Composio MCP server URL:

bash
https://connect.composio.dev/mcp
Add custom connector dialog with Composio MCP server URL

3. Authorize in your browser

Click Connect. You'll be redirected to a browser window where you can authorize Composio to continue.

Composio authorization screen for Claude Cowork

4. Connect your OneSimpleAPI account

Back in Cowork, ask the agent to connect to OneSimpleAPI or give it any OneSimpleAPI-related task.

For example, ask Cowork to:

  • "Generate QR code for checkout page"
  • "Convert landing page into PDF"
  • "Validate signup emails before import"

It will prompt you to authenticate and authorize access.

That's it. Composio's tools are now available in Cowork, and your OneSimpleAPI account is ready to use.

What is Claude Cowork?

Claude Cowork is Anthropic's agent for general knowledge work. It can use your computer, files, and connected applications to complete longer-running tasks across your work tools.

With Composio Connect, Cowork can securely access apps like OneSimpleAPI through MCP without you sharing account credentials directly with the agent.

What is the OneSimpleAPI MCP server, and what's possible with it?

The OneSimpleAPI MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your OneSimpleAPI account. It provides structured and secure access to web, image, document, URL, validation, currency, and file utilities, so your agent can capture webpages, transform images, generate PDFs and QR codes, manage short links, and validate content on your behalf.

  • Web captures and PDF creation: Have your agent capture screenshots of webpages or raw HTML, or turn that content into hosted PDF files.
  • Image inspection and transformation: Let the agent inspect image dimensions and metadata, then resize, crop, rotate, flip, filter, add borders, or optimize images.
  • QR codes and short links: Direct your agent to generate hosted QR codes, create configurable short links, expand shortened links, and review link click statistics.
  • Content and data checks: Instruct your agent to analyze text readability and sentiment, validate email addresses, convert colors, and inspect image details.
  • Currency, pricing, and file management: Have your agent convert currencies, calculate localized pricing discounts, list generated files, and delete files you no longer need.
TOOLS

Supported Tools

Every OneSimpleAPI action and event your agent gets out of the box.

Analyze Readability

Analyze text for readability, grade level, reading time, difficult-word counts, and sentiment.

Calculate PPP Discount

Calculate a purchasing-power-parity discount and localized price between an origin and a destination country.

Capture Screenshot

Capture a webpage URL or raw HTML as a hosted screenshot and return its URL and rendering metadata.

Convert Currency

Convert an amount between supported currencies and return the converted value and exchange rate.

Create Short URL

Create a OneSimpleAPI short URL with optional one-time-use, redirect, query-forwarding, and active-date controls.

Delete File

Delete a generated OneSimpleAPI file by its hosted URL and return the updated file record.

Expand Short URL

Resolve a shortened URL and return its final URL, redirect count, and redirect trace.

Generate or Convert Color

Generate a deterministic color palette from text or convert a supplied color into HEX, RGB, HSL, and related palette values.

Generate PDF

Generate a PDF from either a webpage URL or raw HTML and return the hosted PDF URL and page metadata.

Generate QR Code

Generate a hosted PNG or SVG QR code for a message and return its URL.

Get Image Information

Extract dimensions, image metadata, EXIF camera fields, and available GPS details from an image URL.

List Files

Return one page of generated files owned by the connected account, optionally filtered by live or deleted status.

List Short URLs

Return one page of OneSimpleAPI short URLs and their click statistics.

Transform Image

Resize, crop, rotate, flip, filter, border, optimize, and host an image, returning the generated image URL and metadata.

Validate Email

Validate an email address and assess its domain, MX records, deliverability, disposability, role status, and registration safety.

FRAMEWORKS

How to build OneSimpleAPI MCP Agent with another framework

OpenAI Agents SDK logo

OpenAI Agents SDK

Use OneSimpleAPI MCP with OpenAI Agents SDK

Claude Agent SDK logo

Claude Agent SDK

Use OneSimpleAPI MCP with Claude Agent SDK

Claude Code logo

Claude Code

Use OneSimpleAPI MCP with Claude Code

Codex logo

Codex

Use OneSimpleAPI MCP with Codex

OpenClaw logo

OpenClaw

Use OneSimpleAPI MCP with OpenClaw

Hermes logo

Hermes

Use OneSimpleAPI MCP with Hermes

CLI logo

CLI

Use OneSimpleAPI MCP with CLI

Google ADK logo

Google ADK

Use OneSimpleAPI MCP with Google ADK

LangChain logo

LangChain

Use OneSimpleAPI MCP with LangChain

Vercel AI SDK logo

Vercel AI SDK

Use OneSimpleAPI MCP with Vercel AI SDK

Mastra AI logo

Mastra AI

Use OneSimpleAPI MCP with Mastra AI

LlamaIndex logo

LlamaIndex

Use OneSimpleAPI MCP with LlamaIndex

CrewAI logo

CrewAI

Use OneSimpleAPI MCP with CrewAI

FAQ

Frequently asked questions

With a standalone OneSimpleAPI MCP server, the agents and LLMs can only access a fixed set of OneSimpleAPI tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from OneSimpleAPI and many other apps based on the task at hand, all through a single MCP endpoint.

Yes, you can. Claude Cowork fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right OneSimpleAPI tools.

Yes, absolutely. You can configure which OneSimpleAPI scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.

All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your OneSimpleAPI data and credentials are handled as safely as possible.

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