Have you developed services that interact via API with other systems?

Yes, I have developed services that interact with other systems via APIs. For example, I created RESTful APIs in Python using Flask or FastAPI, which accepted requests, processed data, and returned responses in JSON format. I also wrote client scripts for integration with external APIs, such as retrieving data from third-party services.

Here's an example of a simple REST API in Flask:

from flask import Flask, jsonify, request

app = Flask(__name__)

@app.route('/api/data', methods=['GET'])
def get_data():
    sample_data = {'id': 1, 'name': 'Example'}
    return jsonify(sample_data)

if __name__ == '__main__':
    app.run(debug=True)

Such a service can be used by other systems to send or receive data.