Real-Time Currency Conversion Microservice with Web Scraping - n8n Workflow

Developers needing a lightweight, custom currency API without third-party subscriptions.
Finance teams requiring up-to-date, scraped exchange rates.
Users looking for advanced n8n templates showcasing web scraping and synchronous response handling.
Anyone interested in building microservices using n8n.

The challenge for many projects is accessing reliable, real-time financial data, specifically currency exchange rates, without incurring high API costs. This powerful n8n workflow transforms a standard web scraping operation into a high-utility, real-time microservice.

By leveraging the webhook n8n trigger, this automation instantly processes requests, fetches data using an n8n node for HTTP requests, and expertly extracts the rate from potentially complex HTML structure. This entire n8n setup is highly valuable for integrating live exchange data into applications or internal reporting systems. This specific n8n workflow demonstrates how to deploy robust backend logic using common n8n node types.

This n8n workflow is designed for immediate, synchronous execution upon an external request:

1. Capture Conversion Query (n8n trigger): The process begins when an external system (like a client application or another service) sends a request to the designated webhook URL. This n8n trigger captures the input, which presumably contains the currencies and amount to convert.


2. Fetch Exchange Rate: The workflow uses an HTTP Request n8n node to call an external data source (likely a public currency conversion website). This is the core data fetching step.


3. Extract Conversion Data: Since the HTTP request likely returns HTML instead of clean JSON, the HTML n8n node is vital. It uses selectors (CSS/XPath) to isolate and extract the precise conversion rate value from the raw HTML content.


4. Format Currency Response: The Set n8n node cleans up and restructures the extracted data into a clear JSON format, preparing the final output structure that the caller expects.


5. Send Conversion Response: Finally, the Respond to Webhook n8n node immediately returns the formatted conversion result back to the system that initiated the original webhook n8n trigger, completing the synchronous operation.

To deploy this n8n workflow, follow these steps:

1. Import: Copy the provided JSON code and paste it into your n8n instance using the 'New' -> 'Import from JSON' function.


2. Webhook Setup: The 'Capture Conversion Query' n8n trigger will automatically generate a unique test URL and production URL. Save this URL for integration with your client application.


3. Credential Configuration: Ensure you have no credentials required for the 'Fetch Exchange Rate' n8n node, assuming it targets a publicly accessible source. If authentication is needed for the target website, update the HTTP Request n8n node credentials accordingly.


4. Configuration Check: Crucially, review the 'Fetch Exchange Rate' n8n node URL and the selectors within the 'Extract Conversion Data' HTML n8n node. These must be customized to match the specific website you intend to scrape, ensuring accurate data extraction.


5. Activation: Set the n8n workflow to 'Active' to start listening for incoming requests on the webhook n8n trigger.

Capture Conversion Query (Webhook n8n trigger): Serves as the initiation point, listening for incoming HTTP requests that contain the currency conversion parameters.
Fetch Exchange Rate (HTTP Request n8n node): Executes the external call to scrape the live currency data. Configuration must specify the target URL, dynamically incorporating input parameters from the webhook.
Extract Conversion Data (HTML n8n node): Essential for web scraping operations. It uses parsing logic (CSS selectors) to target and pull out the specific exchange rate value from the raw HTML response body returned by the previous n8n node.
Format Currency Response (Set n8n node): Used to structure the output data cleanly, renaming keys and ensuring the response is consumable by the calling service.

• Send Conversion Response (Respond to Webhook n8n node): Sends the final, processed currency conversion result back to the client that invoked the initial n8n trigger, fulfilling the synchronous request/response cycle of this n8n workflow.