# OneSimpleAPI

```json
{
  "name": "OneSimpleAPI",
  "slug": "onesimpleapi",
  "url": "https://composio.dev/toolkits/onesimpleapi",
  "markdown_url": "https://composio.dev/toolkits/onesimpleapi.md",
  "logo_url": "https://logos.composio.dev/api/onesimpleapi",
  "categories": [
    "developer tools & devops"
  ],
  "is_composio_managed": false,
  "updated_at": "2026-08-20T15:33:24.092Z"
}
```

![OneSimpleAPI logo](https://logos.composio.dev/api/onesimpleapi)

## Description

Securely connect your AI agents and chatbots (Claude, ChatGPT, Cursor, etc) with OneSimpleAPI MCP or direct API to generate QR codes, convert web pages to PDFs, validate data, manage URLs, and process files through natural language.

## Summary

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.

## Categories

- developer tools & devops

## Toolkit Details

- Tools: 15

## Images

- Logo: https://logos.composio.dev/api/onesimpleapi

## Authentication

- **Api Key**
  - Type: `api_key`
  - Description: Api Key authentication for OneSimpleAPI.
  - Setup:
    - Configure Api Key credentials for OneSimpleAPI.
    - Use the credentials when creating an auth config in Composio.

## Suggested Prompts

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

## Supported Tools

| Tool slug | Name | Description |
|---|---|---|
| `ONESIMPLEAPI_ANALYZE_READABILITY` | Analyze Readability | Analyze text for readability, grade level, reading time, difficult-word counts, and sentiment. |
| `ONESIMPLEAPI_CALCULATE_PPP_DISCOUNT` | Calculate PPP Discount | Calculate a purchasing-power-parity discount and localized price between an origin and a destination country. |
| `ONESIMPLEAPI_CAPTURE_SCREENSHOT` | Capture Screenshot | Capture a webpage URL or raw HTML as a hosted screenshot and return its URL and rendering metadata. |
| `ONESIMPLEAPI_CONVERT_CURRENCY` | Convert Currency | Convert an amount between supported currencies and return the converted value and exchange rate. |
| `ONESIMPLEAPI_CREATE_SHORT_URL` | Create Short URL | Create a OneSimpleAPI short URL with optional one-time-use, redirect, query-forwarding, and active-date controls. |
| `ONESIMPLEAPI_DELETE_FILE` | Delete File | Delete a generated OneSimpleAPI file by its hosted URL and return the updated file record. |
| `ONESIMPLEAPI_EXPAND_SHORT_URL` | Expand Short URL | Resolve a shortened URL and return its final URL, redirect count, and redirect trace. |
| `ONESIMPLEAPI_GENERATE_OR_CONVERT_COLOR` | Generate or Convert Color | Generate a deterministic color palette from text or convert a supplied color into HEX, RGB, HSL, and related palette values. |
| `ONESIMPLEAPI_GENERATE_PDF` | Generate PDF | Generate a PDF from either a webpage URL or raw HTML and return the hosted PDF URL and page metadata. |
| `ONESIMPLEAPI_GENERATE_QR_CODE` | Generate QR Code | Generate a hosted PNG or SVG QR code for a message and return its URL. |
| `ONESIMPLEAPI_GET_IMAGE_INFORMATION` | Get Image Information | Extract dimensions, image metadata, EXIF camera fields, and available GPS details from an image URL. Returned fields vary with the metadata embedded in the image. |
| `ONESIMPLEAPI_LIST_FILES` | List Files | Return one page of generated files owned by the connected account, optionally filtered by live or deleted status. |
| `ONESIMPLEAPI_LIST_SHORT_URLS` | List Short URLs | Return one page of OneSimpleAPI short URLs and their click statistics. |
| `ONESIMPLEAPI_TRANSFORM_IMAGE` | Transform Image | Resize, crop, rotate, flip, filter, border, optimize, and host an image, returning the generated image URL and metadata. |
| `ONESIMPLEAPI_VALIDATE_EMAIL` | Validate Email | Validate an email address and assess its domain, MX records, deliverability, disposability, role status, and registration safety. |

## Supported Triggers

None listed.

## Installation and MCP Setup

### Path 1: SDK Installation

#### Path 1, Step 1: Install Composio

Install the Composio SDK
```python
pip install composio_openai
```

```typescript
npm install @composio/openai
```

#### Path 1, Step 2: Initialize Composio and Create Tool Router Session

Import and initialize Composio client, then create a Tool Router session
```python
from openai import OpenAI
from composio import Composio
from composio_openai import OpenAIResponsesProvider

composio = Composio(provider=OpenAIResponsesProvider())
openai = OpenAI()
session = composio.create(user_id='your-user-id')
```

```typescript
import OpenAI from 'openai';
import { Composio } from '@composio/core';
import { OpenAIResponsesProvider } from '@composio/openai';

const composio = new Composio({
  provider: new OpenAIResponsesProvider(),
});
const openai = new OpenAI({});
const session = await composio.create('your-user-id');
```

#### Path 1, Step 3: Execute OneSimpleAPI Tools via Tool Router with Your Agent

Get tools from Tool Router session and execute OneSimpleAPI actions with your Agent
```python
tools = session.tools
response = openai.responses.create(
  model='gpt-4.1',
  tools=tools,
  input=[{
    'role': 'user',
    'content': 'Generate a QR code for https://example.com/pricing and return the image URL'
  }]
)
result = composio.provider.handle_tool_calls(
  response=response,
  user_id='your-user-id'
)
print(result)
```

```typescript
const tools = session.tools;
const response = await openai.responses.create({
  model: 'gpt-4.1',
  tools: tools,
  input: [{
    role: 'user',
    content: 'Generate a QR code for https://example.com/pricing and return the image URL'
  }],
});
const result = await composio.provider.handleToolCalls(
  'your-user-id',
  response.output
);
console.log(result);
```

### Path 2: MCP Server Setup

#### Path 2, Step 1: Install Composio

Install the Composio SDK for Python or TypeScript
```python
pip install composio claude-agent-sdk
```

```typescript
npm install @composio/core ai @ai-sdk/openai @ai-sdk/mcp
```

#### Path 2, Step 2: Initialize Client and Create Tool Router Session

Import and initialize the Composio client, then create a Tool Router session for OneSimpleAPI
```python
from composio import Composio
from claude_agent_sdk import ClaudeSDKClient, ClaudeAgentOptions

composio = Composio(api_key='your-composio-api-key')
session = composio.create(user_id='your-user-id')
url = session.mcp.url
```

```typescript
import { Composio } from '@composio/core';

const composio = new Composio({ apiKey: 'your-api-key' });
const session = await composio.create('your-user-id');
console.log(`Tool Router session created: ${session.mcp.url}`);
```

#### Path 2, Step 3: Connect to AI Agent

Use the MCP server with your AI agent (Anthropic Claude or Mastra)
```python
import asyncio

options = ClaudeAgentOptions(
    permission_mode='bypassPermissions',
    mcp_servers={
        'tool_router': {
            'type': 'http',
            'url': url,
            'headers': {
                'x-api-key': 'your-composio-api-key'
            }
        }
    },
    system_prompt='You are a helpful assistant with access to OneSimpleAPI tools.',
    max_turns=10
)

async def main():
    async with ClaudeSDKClient(options=options) as client:
        await client.query('Convert https://example.com/blog/product-update into a PDF and return the file link')
        async for message in client.receive_response():
            if hasattr(message, 'content'):
                for block in message.content:
                    if hasattr(block, 'text'):
                        print(block.text)

asyncio.run(main())
```

```typescript
import { openai } from '@ai-sdk/openai';
import { experimental_createMCPClient as createMCPClient } from '@ai-sdk/mcp';
import { generateText } from 'ai';

const client = await createMCPClient({
  transport: {
    type: 'http',
    url: session.mcp.url,
    headers: {
      'x-api-key': 'your-composio-api-key',
    },
  },
});

const tools = await client.tools();
const { text } = await generateText({
  model: openai('gpt-4o'),
  tools,
  messages: [{
    role: 'user',
    content: 'Convert https://example.com/blog/product-update into a PDF and return the file link'
  }],
  maxSteps: 5,
});

console.log(`Agent: ${text}`);
```

## Why Use Composio?

### 1. AI Native OneSimpleAPI Integration

- Supports both OneSimpleAPI MCP and direct API based integrations
- Structured, LLM-friendly schemas for reliable tool execution
- Rich coverage for web utilities like PDFs, QR codes, URL tools, validation, exchange rates, and file handling

### 2. Managed Auth

- Store OneSimpleAPI API keys securely instead of hard-coding them in agent code
- Central place to manage, scope, and revoke OneSimpleAPI access
- Per user and per environment credentials so development, staging, and production stay cleanly separated

### 3. Agent Optimized Design

- Tools are shaped so AI agents can pick the right OneSimpleAPI utility without guesswork
- Clear inputs and outputs help agents generate QR codes, convert pages, validate data, and handle files more reliably
- Comprehensive execution logs so you always know what ran, when, and on whose behalf

### 4. Enterprise Grade Security

- Fine-grained RBAC so you control which agents and users can access OneSimpleAPI
- Scoped, least privilege access to OneSimpleAPI utility actions
- Full audit trail of agent actions to support review and compliance

## Use OneSimpleAPI with any AI Agent Framework

Choose a framework you want to connect OneSimpleAPI with:

None listed.

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## Frequently Asked Questions

### Do I need my own developer credentials to use OneSimpleAPI with Composio?

Yes, OneSimpleAPI requires you to configure your own API key. Once set up, Composio handles secure credential storage and API request handling for you.

### Can I use multiple toolkits together?

Yes! Composio's Tool Router enables agents to use multiple toolkits. [Learn more](https://docs.composio.dev/tool-router/overview).

### Is Composio secure?

Composio is SOC 2 and ISO 27001 compliant with all data encrypted in transit and at rest. [Learn more](https://trust.composio.dev).

### What if the API changes?

Composio maintains and updates all toolkit integrations automatically, so your agents always work with the latest API versions.

---
[See all toolkits](https://composio.dev/toolkits) · [Composio docs](https://docs.composio.dev/llms.txt)