How to Build a Fantasy Football App Starter with Next.js
Fantasy football is one of those ideas that sounds simple until you actually start wiring it to real sports data.
You need player lists, teams, fixtures, statistics, and a UI that can survive missing fields or temporarily unavailable endpoints. That is exactly why I like starter kits: they reduce the amount of architectural decision-making you need to do before you can ship something useful.
In this walkthrough, I built a Fantasy Football Starter Kit with Next.js, React, TypeScript, and Tailwind CSS, powered by the Sportmicro football API. The goal is not to create a complete commercial fantasy platform. Instead, the project is meant to be a practical foundation for developers who want to explore a Fantasy Football API integration without starting from zero.
The source code is available here: https://github.com//sportmicro-fantasy-football-starter-kit
For API reference, see the Sportmicro documentation: https://docs.sportmicro.com/
Why build a starter kit instead of a full platform?
A full fantasy product usually needs authentication, leagues, user management, drafts, transfers, scoring rules, live updates, and a lot of business logic. That is a big project.
A starter kit is more valuable when you want to:
- validate an idea quickly
- learn how a football data API behaves
- prototype a UI around player statistics
- experiment with fantasy points calculations
- create a foundation you can grow later
This repository keeps the scope deliberately small so the architecture stays understandable.
What the project includes
The app shows a few core fantasy-football building blocks:
- football player listing
- player cards
- team information
- upcoming fixtures
- player statistics
- fantasy squad builder
- selected team view
- an example fantasy points calculation
- responsive layout patterns
It is designed to feel like a real developer starting point, not a polished consumer product.
Sportmicro integration
Sportmicro provides the football data. In this starter kit, the API client is intentionally compact and only uses documented endpoints from the supplied reference.
The current client fetches:
/players/teams/matches-by-date/players-statistics
That means the code demonstrates a realistic integration pattern without inventing endpoints or pretending to support features that are not in the docs.
A nice detail from a reliability standpoint is the fallback pattern. If a request fails, the app can still render using local sample data. That is useful during development and also helps communicate to users that the app is a starter kit, not a locked-down production system.
A simple API client pattern
I like to keep the API client in one place so the rest of the app can stay focused on UI composition.
The core idea is:
- build a URL from the Sportmicro base URL
- add query parameters only when needed
- send the request with
fetch - return JSON on success
- throw on non-OK responses
- fall back to local data in the page layer when needed
That pattern makes it easy to add more documented endpoints later.
Example request helper
async function requestJson(path: string, params = {}) {
const url = new URL(path, baseUrl);
// append params
const response = await fetch(url.toString());
if (!response.ok) {
throw new Error(`Sportmicro request failed: ${response.status}`);
}
return response.json();
}
The exact production code in the repository also wires the SPORTMICRO_API_KEY environment variable through request headers so credentials never need to be hardcoded.
Environment configuration
The repo includes an .env.example file so developers know what to configure locally.
SPORTMICRO_API_KEY=
SPORTMICRO_API_BASE_URL=https://football.sportmicro.com
That is a small but important habit: starter kits should make setup obvious before they make anything flashy.
Fantasy points calculation
A fantasy app is not useful until it can translate football data into points. The repository includes a tiny scoring function that weights goals, assists, ratings, and cards.
This is intentionally simple.
Why? Because the point is to show where scoring logic lives, not to pretend there is one universal fantasy scoring system.
If you want to extend the starter kit, you could replace the scoring function with:
- a league-specific rule set
- custom captain bonuses
- lineup constraints
- position-based scoring
- live match adjustments
UI structure
The app uses reusable React components so you can grow the project without rewriting the page from scratch.
For example:
-
PlayerCardrenders individual footballers -
SquadBuilderrenders the selected squad area - the page composes the overall dashboard experience
That separation makes it easier to add search, filters, sorting, or saved squads later.
What I would improve next
The most obvious next steps are:
- real player search input
- position filtering controls
- selectable squad state
- match-centered projections using Sportmicro’s documented projection endpoints
- pagination and caching improvements
- stronger empty-state UI
If you are working with live sports data, one thing worth paying attention to is consistency across paginated endpoints. Data can shift while a user browses, so client-side handling matters.
Lessons learned
A few practical lessons from building this starter:
- small API clients are easier to trust
- fallback data keeps the app runnable
- reusable components make the UI easier to extend
- starter kits are more helpful when they show structure, not just screenshots
- it is better to build around documented endpoints only
Closing thoughts
If you want a football data API example that is easy to read and extend, a starter kit is a great place to begin. Sportmicro fits that approach well because it provides a broad football data surface, and the repo can stay focused on integration patterns rather than trying to solve every fantasy feature at once.
If you want to explore the project, start here:
- GitHub: https://github.com//sportmicro-fantasy-football-starter-kit
- Sportmicro: https://sportmicro.com
- Docs: https://docs.sportmicro.com/
And if you build on it, keep the scope honest. The best starter kits are the ones that help the next developer move quickly without hiding the hard parts.
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