Data API Integration for AI-powered assistant

I am building an AI-powered Football Trading Assistant specializing in analyzing football matches for betting markets on Betfair Exchange. The assistant will use statistical data from reliable football data APIs to provide actionable insights and profitable betting strategies.
I need a freelance specialist to:
Obtain and Integrate Data APIs (site list will be provided)
Configure API Endpoints to fetch specific match data
Ensure the assistant receives accurate, real-time football statistics
Provide Clear Documentation on how the integration works

Tasks for the Developer:
API Research and Selection:
Identify APIs from the listed sources.
Ensure they provide the required data.
Confirm if the APIs require authentication (API key, token).
API Integration:
Configure API endpoints for match stats and player data.
Ensure data is pulled correctly in JSON format.
Data Mapping:
Map API data to match the assistant's analysis criteria.
Ensure compatibility with analysis tools.
Error Handling and Logging:
Set up error responses for API failures.
Ensure smooth data flow and retry mechanisms for failed calls.
Documentation:
Provide clear documentation explaining:
How the API endpoints work
How data flows into the assistant
How to update or change API keys

Technical Requirements:
Experience with REST APIs
Familiarity with JSON format
Knowledge of sports data APIs (bonus if experienced with football data APIs)
Ability to ensure real-time or near-real-time data accuracy
Documentation in clear English