Finance & Accounting · Fixer io + Claude
Fixer io MCP with Claude: Live Currency Rates for Finance Teams
The short answer
Claude works with Fixer io through the Model Context Protocol (MCP), a secure standard that lets Claude use other software with permissions you control. Once connected, Claude can fetch real-time exchange rates, convert amounts between currencies and check historical forex data, all from a plain-language question.
What is Fixer io?
Fixer io is a lightweight API for real-time and historical foreign exchange rates. It helps businesses convert currencies quickly and accurately without complicated set-up. Finance teams, accounts departments, e-commerce operators, travel and procurement teams, and software developers commonly use it to keep currency figures current inside their own tools and reports.
How Claude connects to Fixer io through MCP
The Model Context Protocol is an open standard that works like a universal adapter between Claude and other software. It lets Claude securely read information from a tool and, where you allow it, take actions in that tool. The organisation decides exactly what Claude can reach, so the connection stays under your control.
Once Fixer io is connected, Claude can typically look up current exchange rates, convert an amount from one currency to another, and retrieve past rates for a given date or period. A team member might ask, in ordinary language, what a supplier invoice in euros is worth in pounds today, and receive a clear answer with the rate and date used.
Access is granted using the API key that Fixer io supports, with least-privilege settings so Claude only reaches the data it needs. Consequential actions, such as writing figures into a ledger or triggering a payment, can be set to require approval from a named person before anything happens.
What you can automate
Live invoice conversion
Accounts payable staff can ask Claude to convert foreign supplier invoices into the reporting currency at the current rate. The rate used and its date can be recorded alongside each figure, making month-end reviews faster and easier to audit.
Historical rate lookups for reporting
Finance controllers often need the rate on a specific past date, for example the rate on a transaction date or a quarter end. Claude can retrieve these historical figures on request, reducing manual lookups in spreadsheets.
Pricing for international customers
Sales and e-commerce teams can check how list prices translate across currencies before launching a campaign. Claude can summarise the figures for several markets at once, helping teams set sensible local prices.
Travel and expense checks
Expense reviewers can ask Claude to convert receipts from overseas trips into the home currency at the rate applicable on the travel date. This speeds up claim approval and reduces disputes over conversion amounts.
Treasury and currency exposure briefings
Treasury analysts can request a daily summary of movements in the currencies their business uses. Claude can present the changes in plain language, giving leaders a quick view before meetings.
An end-to-end workflow: Month-end foreign currency reconciliation
TriggerThe accounts team starts the month-end close and a batch of foreign-currency supplier invoices is ready.
Claude reads the list of open foreign-currency invoices from the accounts system.
Claude retrieves the rate for each currency from Fixer io on the agreed reconciliation date.
Claude converts each invoice into the reporting currency and records the rate and date used.
Claude flags any invoice where the converted total differs from the figure in the ledger by more than the agreed tolerance.
The finance controller reviews the flagged items and approves the adjustments before they are posted.
OutcomeTypically, the close takes less time, every conversion is traceable to a stated rate and date, and discrepancies are caught before the books are finalised.
How we set it up
Free automation audit
We review your finance and operations workflows with you to identify where currency conversion and rate lookups take the most time or cause errors.
Secure API key connection
We set up the connection to Fixer io using your API key, stored securely, with access limited to the rates and functions your workflow needs.
Workflow design
We design the end-to-end process across Fixer io and your other systems such as your accounting, ERP or CRM platform, agreeing which actions need human approval.
Testing against real cases
We test the workflow using past invoices and transactions, checking the results against figures your team has already verified.
Launch, monitoring and training
We launch with audit logs and monitoring in place, then train your team to use Claude confidently and to review its outputs.
Who benefits
- Finance controller
- Faster, traceable currency conversions at month end, with a clear record of the rate and date used.
- Accounts payable team
- Quicker handling of foreign supplier invoices without switching between tools and spreadsheets.
- Sales or e-commerce manager
- Up-to-date view of how prices translate across markets before campaigns go live.
- Operations or IT head
- A secure, permission-controlled connection that fits existing governance and audit requirements.
Security and control
- Access is granted with an API key and least-privilege settings, so Claude only reaches the rates and functions it needs.
- Actions that change financial records can require approval from a named person before they take effect.
- Every request and response can be logged, giving your team an audit trail for reviews.
- We test thoroughly against real past cases before launch to confirm outputs match your verified figures.
- Exchange rate data is informational; your finance team remains responsible for the final figures and decisions.
For teams in the US, UK, India and the Middle East
Organisations in the United States and the United Kingdom can host the workflow in their chosen region to align with their internal data policies. Indian businesses are supported in line with the Digital Personal Data Protection Act, 2023. Companies in the UAE and Saudi Arabia are supported in line with their respective national data protection laws. We select the hosting region for each deployment to meet your specific regulatory and contractual requirements.
Learn more about Claude and MCP
Anthropic's AI model and assistant.
Secure links between Claude and business tools.
How engineers build and change software with Claude.
Hosted agents that run multi-step work.
The open standard Claude uses to connect to tools.
Frequently asked questions
What does the Fixer io MCP server do?
The Fixer io MCP server acts as a secure bridge between Claude and Fixer io. It lets Claude request live exchange rates, convert currency amounts and retrieve historical rates, using the permissions you set. It does not give Claude access to anything beyond the Fixer io functions you choose to enable.
Is connecting Fixer io to Claude secure?
Security depends on the set-up. We use your Fixer io API key stored securely, grant least-privilege access, and can require approval for any action that changes records. Every interaction can be logged for audit purposes. We also test the connection before launch to confirm it behaves as intended.
What can Claude do with Fixer io once connected?
Typically, Claude can fetch current exchange rates, convert amounts between currencies, and look up historical rates for a specific date or period. It can then summarise results or pass them into other workflows, such as an invoice review or a pricing report, always within the limits you define.
How long does setup take?
Timelines vary with the complexity of your workflows and the systems involved. A single, well-defined connection can often be set up quickly, while a multi-system workflow with approval steps and testing typically takes longer. We confirm the timeline during the free automation audit.
Which plan or permissions do I need for Fixer io?
Generally, you need a Fixer io account that issues an API key, and the plan you hold must cover the rate requests and historical data your workflow requires. During the audit we check your current plan and permissions and advise whether any change is needed before connecting.