# How to integrate Fixer io MCP with Atomic Agent

```json
{
  "title": "How to integrate Fixer io MCP with Atomic Agent",
  "toolkit": "Fixer io",
  "toolkit_slug": "fixer_io",
  "framework": "Atomic Agent",
  "framework_slug": "atomic-agent",
  "url": "https://composio.dev/toolkits/fixer_io/framework/atomic-agent",
  "markdown_url": "https://composio.dev/toolkits/fixer_io/framework/atomic-agent.md",
  "updated_at": "2026-08-11T13:09:41.661Z"
}
```

## Introduction

Atomic Agent is an open-source AI agent that runs on your machine and supports local models through llama.cpp. Connect it to 1,500+ apps through Composio, including Fixer io.
This guide uses Atomic Agent's built-in Composio integration. You need Atomic Agent v0.5.6 or later, your own Composio API key, and a Fixer io account. See the [Atomic Agent documentation](https://atomicagent.io/docs/?cta_placement=atomic-agent-docs) for installation instructions.

## Also integrate Fixer io with

- [OpenAI Agents SDK](https://composio.dev/toolkits/fixer_io/framework/open-ai-agents-sdk)
- [Claude Agent SDK](https://composio.dev/toolkits/fixer_io/framework/claude-agents-sdk)
- [Claude Code](https://composio.dev/toolkits/fixer_io/framework/claude-code)
- [Claude Cowork](https://composio.dev/toolkits/fixer_io/framework/claude-cowork)
- [Codex](https://composio.dev/toolkits/fixer_io/framework/codex)
- [OpenClaw](https://composio.dev/toolkits/fixer_io/framework/openclaw)
- [Hermes](https://composio.dev/toolkits/fixer_io/framework/hermes-agent)
- [Google ADK](https://composio.dev/toolkits/fixer_io/framework/google-adk)
- [LangChain](https://composio.dev/toolkits/fixer_io/framework/langchain)
- [Vercel AI SDK](https://composio.dev/toolkits/fixer_io/framework/ai-sdk)
- [Mastra AI](https://composio.dev/toolkits/fixer_io/framework/mastra-ai)
- [LlamaIndex](https://composio.dev/toolkits/fixer_io/framework/llama-index)
- [CrewAI](https://composio.dev/toolkits/fixer_io/framework/crew-ai)
- [Pydantic AI](https://composio.dev/toolkits/fixer_io/framework/pydantic-ai)
- [AutoGen](https://composio.dev/toolkits/fixer_io/framework/autogen)

## TL;DR

### How Atomic Agent connects to Fixer io
Atomic Agent connects to Composio's Tool Router over Streamable HTTP MCP. It discovers the tools needed for your request, and Composio handles account authentication.
Execution and account-connection tools follow Atomic Agent's configured approval policy. Review any approval prompt before allowing an action on your connected account.

## Connect Fixer io to Atomic Agent

### Connect Fixer io to Atomic Agent
- Sign up or sign in to the [Composio dashboard](https://dashboard.composio.dev/?cta_placement=atomic-agent-api-key). Copy your API key.
- In Atomic Agent, open the Integrations tab and select Composio. Select API key, press e, paste the key, and press Enter. The tools become available immediately, without a restart.
- Ask Atomic Agent to do something in Fixer io. It searches Composio for the right tool.
- On first use, open the sign-in link returned in the chat. Connect your Fixer io account, then return to Atomic Agent to continue.
### Headless setup
Add the following line to ~/.atomic-agent/.env, replacing YOUR_COMPOSIO_API_KEY with your key. Start Atomic Agent after saving the file.

```bash
COMPOSIO_API_KEY=YOUR_COMPOSIO_API_KEY
```

## What is the Fixer io MCP server, and what's possible with it?

The Fixer io MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Fixer io account. It provides structured and secure access to global currency exchange data, so your agent can perform actions like converting currencies, fetching historical rates, tracking exchange fluctuations, and listing supported symbols on your behalf.
- Real-time currency conversion: Instantly convert amounts between currencies using up-to-date or historical exchange rates with a single prompt.
- Fetch latest and historical rates: Let your agent retrieve the most recent exchange rates or get historical rates for any supported date to power financial analysis.
- Analyze currency fluctuations: Ask your agent to track and summarize day-to-day currency changes between two dates to monitor trends or volatility.
- Retrieve supported currency symbols: Quickly list all available currency codes and their full names to support app interfaces or custom workflows.
- Get exchange rate time series: Easily pull daily exchange rates over a custom period (up to 365 days) for detailed trend analysis or reporting.

## Supported Tools

| Tool slug | Name | Description |
|---|---|---|
| `FIXER_IO_CONVERT_CURRENCY` | Convert Currency | Tool to convert an amount from one currency to another. Use when you need current or historical exchange rates. Specify `date` for historical rates. |
| `FIXER_IO_GET_FLUCTUATION` | Get Currency Fluctuations | Tool to fetch exchange rate fluctuations between two dates. Use when you need day-to-day currency rate changes. |
| `FIXER_IO_GET_HISTORICAL_RATES` | Get Historical Rates | Fetch historical exchange rates for a specific date. Returns end-of-day (EOD) exchange rates for any date back to January 1, 1999. Use this when you need past currency conversion rates or historical financial data. |
| `FIXER_IO_GET_SUPPORTED_SYMBOLS` | Get Supported Symbols | Tool to retrieve the list of all available currency symbols and their corresponding names. Use when you need to fetch and display supported currency codes. |
| `FIXER_IO_GET_TIME_SERIES` | Get Time Series | Retrieves daily foreign exchange rates for a date range. Returns a time series of exchange rates for each day between start_date and end_date (inclusive, max 365 days). The rates show how much of each currency equals one unit of the base currency. |

## Supported Triggers

None listed.

## Troubleshooting

### Why is my API key rejected?

Copy the key directly from the Composio dashboard. Atomic Agent requires ASCII characters because it sends the key in an HTTP header. Remove any extra characters introduced when copying.

### Why are Composio tools unavailable after saving a key?

Check that you use Atomic Agent v0.5.6 or later and that Composio is enabled in your configuration. A "composio": { "enabled": false } setting disables the integration while keeping the saved key on disk.

### Does Composio have a free plan?

The Hobby plan includes 100,000 tool calls per month. Composio-managed OAuth apps have a lower included allowance. See [Composio pricing](/pricing) for the current limits that apply to your connection.

## Complete Code

None listed.

## Conclusion

### Use Fixer io from Atomic Agent
With your account connected, ask Atomic Agent to work with Fixer io in natural language. You can connect more apps through the same Composio integration as you need them.
Visit the [Atomic Agent website](https://atomicagent.io/?cta_placement=atomic-agent-site) or inspect the [Atomic Agent source code](https://github.com/AtomicBot-ai/atomic-agent?cta_placement=atomic-agent-repo).

## How to build Fixer io MCP Agent with another framework

- [OpenAI Agents SDK](https://composio.dev/toolkits/fixer_io/framework/open-ai-agents-sdk)
- [Claude Agent SDK](https://composio.dev/toolkits/fixer_io/framework/claude-agents-sdk)
- [Claude Code](https://composio.dev/toolkits/fixer_io/framework/claude-code)
- [Claude Cowork](https://composio.dev/toolkits/fixer_io/framework/claude-cowork)
- [Codex](https://composio.dev/toolkits/fixer_io/framework/codex)
- [OpenClaw](https://composio.dev/toolkits/fixer_io/framework/openclaw)
- [Hermes](https://composio.dev/toolkits/fixer_io/framework/hermes-agent)
- [Google ADK](https://composio.dev/toolkits/fixer_io/framework/google-adk)
- [LangChain](https://composio.dev/toolkits/fixer_io/framework/langchain)
- [Vercel AI SDK](https://composio.dev/toolkits/fixer_io/framework/ai-sdk)
- [Mastra AI](https://composio.dev/toolkits/fixer_io/framework/mastra-ai)
- [LlamaIndex](https://composio.dev/toolkits/fixer_io/framework/llama-index)
- [CrewAI](https://composio.dev/toolkits/fixer_io/framework/crew-ai)
- [Pydantic AI](https://composio.dev/toolkits/fixer_io/framework/pydantic-ai)
- [AutoGen](https://composio.dev/toolkits/fixer_io/framework/autogen)

## Related Toolkits

- [Stripe](https://composio.dev/toolkits/stripe) - Stripe is a global online payments platform offering APIs for managing payments, customers, and subscriptions. Trusted by businesses for secure, efficient, and scalable payment processing worldwide.
- [44API](https://composio.dev/toolkits/44api) - 44API is an API service for validating VAT and tax identifiers and returning company details. Use it to verify business tax data and manage account IP whitelists quickly.
- [Airwallex](https://composio.dev/toolkits/airwallex) - Airwallex is a global financial platform providing business accounts, payments, payouts, FX, and cards. Built to simplify cross-border payments and streamline financial operations for businesses.
- [Aiwyn Tax MCP](https://composio.dev/toolkits/aiwyn_tax_mcp) - Aiwyn Tax MCP is a tax estimation service powered by Aiwyn's federal and state tax engine. It helps teams estimate tax outcomes without building tax calculation logic from scratch.
- [Alpaca](https://composio.dev/toolkits/alpaca) - Alpaca is a stock and crypto trading platform for commission-free trading, real-time market data, and algorithmic strategies. Use it to build brokerage apps, trading bots, and portfolio workflows with market connectivity.
- [Alpha vantage](https://composio.dev/toolkits/alpha_vantage) - Alpha Vantage is a financial data platform offering real-time and historical stock market APIs. Get instant, reliable access to equities, forex, and technical analysis data for smarter trading decisions.
- [Altoviz](https://composio.dev/toolkits/altoviz) - Altoviz is a cloud-based billing and invoicing platform for businesses. It streamlines online payments, expense tracking, and customizable invoice management.
- [Benzinga](https://composio.dev/toolkits/benzinga) - Benzinga provides real-time financial news and data APIs for market coverage. It helps you track breaking news and actionable market insights instantly.
- [Bigdata.com MCP](https://composio.dev/toolkits/bigdata_com_mcp) - Bigdata.com MCP provides grounded access to financial news, transcripts, filings, and entity intelligence. Ideal for building research workflows and generating timely market insights.
- [Billsby](https://composio.dev/toolkits/billsby) - Billsby is a subscription billing platform for managing customers, subscriptions, invoices, products, plans, usage counters, add-ons, and allowances. It helps SaaS and subscription teams automate billing operations without building complex billing logic from scratch.
- [Brex](https://composio.dev/toolkits/brex) - Brex provides corporate credit cards and spend management tailored for startups and tech businesses. It helps optimize company cash flow, streamline accounting, and accelerate business growth.
- [Cashfree Payments MCP](https://composio.dev/toolkits/cashfree_payments_mcp) - Cashfree Payments MCP is a merchant payments platform that handles collection, payouts, subscriptions, settlements, refunds, and identity verification. Simplifies merchant money lifecycle management with unified, API-driven workflows.
- [Chaser](https://composio.dev/toolkits/chaser) - Chaser is accounts receivable automation software that sends invoice reminders and helps businesses get paid faster. It streamlines the collections process to save time and improve cash flow.
- [Clarity AI MCP](https://composio.dev/toolkits/clarity_ai_mcp) - Clarity AI MCP is an MCP toolkit for simulating SFDR 2.0 fund classifications from a fund name, ISIN, or CUSIP. Use it to tap Clarity AI disclosure data and modeling without building custom sustainability-data workflows.
- [Clientary](https://composio.dev/toolkits/clientary) - Clientary is a platform for managing clients, invoices, projects, proposals, and more. It streamlines client work and saves you serious admin time.
- [Coinbase](https://composio.dev/toolkits/coinbase) - Coinbase is a platform for buying, selling, and storing cryptocurrency. It makes exchanging and managing crypto simple and secure for everyone.
- [Coinbase Wallet MCP](https://composio.dev/toolkits/coinbase_wallet_mcp) - Coinbase Wallet MCP is Coinbase's wallet service for interacting with onchain accounts. Use it to give agents secure, structured access to inspect wallets and request onchain actions.
- [Coinranking](https://composio.dev/toolkits/coinranking) - Coinranking is a comprehensive cryptocurrency market data platform offering access to real-time coin prices, market caps, and historical data. Get accurate, up-to-date stats for thousands of digital assets in one place.
- [Coupa](https://composio.dev/toolkits/coupa) - Coupa is a business spend management platform for procurement, invoicing, and expenses. It helps organizations streamline purchasing, control costs, and gain complete visibility over financial operations.
- [CurrencyScoop](https://composio.dev/toolkits/currencyscoop) - CurrencyScoop is a developer-friendly API for real-time and historical currency exchange rates. Easily access fiat and crypto data for smart, up-to-date financial applications.

## Frequently Asked Questions

### What are the differences in Tool Router MCP and Fixer io MCP?

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

### Can I use Tool Router MCP with Atomic Agent?

Yes, you can. Atomic Agent 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 Fixer io tools.

### Can I manage the permissions and scopes for Fixer io while using Tool Router?

Yes, absolutely. You can configure which Fixer io 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.

### How safe is my data with Composio Tool Router?

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 Fixer io data and credentials are handled as safely as possible.

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