GoLang API Development for Analytics

I need an API built in GoLang that will retrieve analytics data. The data should be presented in raw JSON format.

Key Requirements:
- API functionality: Data retrieval
- Data type: Analytics data
- Presentation format: Raw JSON

Ideal Skills and Experience:
- Proficiency in GoLang
- Experience in building APIs
- Familiarity with handling and structuring analytics data
- Knowledge of JSON formatting and data retrieval processes

Please provide examples of similar work done. Looking forward to your bids!