How I Built a Phone Specs API with 200 Phones and $0 Monthly Cost

#ai #webdev #python #opensource

How I Built a Phone Specs API and Launched It on RapidAPI

I spent a weekend building a smartphone specifications API. Here's the tech stack, the decisions I made, and how you can build one too — plus how I expanded it to 200 phones for $0/month.

Why Phone Specs?

I needed structured phone specification data for a comparison tool. Existing solutions were either:

Too expensive ($99+/month)
Outdated (2022 specs)
Missing Chinese brands (Xiaomi, OPPO, vivo, Huawei)

So I built my own.

The Stack

Layer	Choice	Why
API	FastAPI	Fast, auto-docs (Swagger UI), async
Data	JSON file	No DB overhead for 200 records
Hosting	Railway	Auto-deploy from GitHub, free tier
Distribution	RapidAPI	Built-in billing, rate limiting, discoverability
Search	In-memory	Python Levenshtein scoring, no Elasticsearch needed

Total monthly cost: $0 (Railway free tier + RapidAPI free plan)

The Schema

Each phone record has 38 fields covering:

Display: size, type, resolution, refresh rate
Performance: chipset, CPU cores, GPU, RAM, storage
Camera: main, count, specs, front, video
Battery: capacity, wired/wireless charging
Design: weight, dimensions, water resistance, material
Connectivity: 5G, NFC, infrared, headphone jack

{
  "id": "samsung_galaxys25ultra",
  "brand": "Samsung",
  "model": "Galaxy S25 Ultra",
  "screen_size": "6.8英寸",
  "screen_type": "Dynamic LTPO AMOLED 2X",
  "resolution": "3120x1440",
  "refresh_rate": "120Hz",
  "chipset": "Snapdragon 8 Gen 4",
  "ram": "16GB",
  "storage": "512GB",
  "rear_camera_main": "200MP",
  "battery_capacity": "5000mAh",
  "os": "Android 15",
  "water_resistance": "IP68"
}

The Endpoints

# Search by keyword
GET /api/v1/search?q=iPhone&limit=10

# Full specs by ID
GET /api/v1/specs/apple_iphone16promax

# Side-by-side comparison
GET /api/v1/compare?id1=apple_iphone16pro&id2=samsung_galaxys25ultra

# Brand catalog
GET /api/v1/brands

# Database stats
GET /api/v1/stats