免费API资源大全：2026年开发者必备的50个免费API

# Hugging Face 免费API调用示例
import requests

API_URL = "https://api-inference.huggingface.co/models/sentence-transformers/all-MiniLM-L6-v2"
headers = {"Authorization": "Bearer hf_your_token_here"}

def get_embedding(text):
    response = requests.post(API_URL, headers=headers, json={"inputs": text})
    return response.json()

embedding = get_embedding("Hello, world!")
print(f"向量维度: {len(embedding)}")

# Open-Meteo 免费天气查询（无需API Key）
import requests

def get_weather(lat, lon):
    url = f"https://api.open-meteo.com/v1/forecast"
    params = {
        "latitude": lat,
        "longitude": lon,
        "current": "temperature_2m,wind_speed_10m",
        "timezone": "auto"
    }
    resp = requests.get(url, params=params)
    return resp.json()

# 查询北京天气
weather = get_weather(39.9, 116.4)
print(f"当前温度: {weather['current']['temperature_2m']}°C")

// REST Countries API 查询国家信息
async function getCountryInfo(name) {
    const resp = await fetch(`https://restcountries.com/v3.1/name/${name}`);
    const data = await resp.json();
    const country = data[0];
    console.log(`国家: ${country.name.common}`);
    console.log(`首都: ${country.capital?.[0] || '无'}`);
    console.log(`人口: ${country.population.toLocaleString()}`);
    console.log(`货币: ${Object.keys(country.currencies).join(', ')}`);
}

getCountryInfo("china");

# NumbersAPI 获取数字趣味事实
import requests

def get_number_fact(number):
    url = f"http://numbersapi.com/{number}"
    resp = requests.get(url)
    return resp.text

print(get_number_fact(42))
# 输出示例: 42 is the number of little squares that make up ...

<!-- QR Server API 直接生成二维码 -->
<img src="https://api.qrserver.com/v1/create-qr-code/?size=200x200&data=https://example.com" 
     alt="QR Code" />

# Bored API 获取随机活动建议
import requests

def get_random_activity():
    resp = requests.get("https://www.boredapi.com/api/activity")
    data = resp.json()
    return f"建议活动: {data['activity']}（类型: {data['type']}）"

print(get_random_activity())

import functools
import time

@functools.lru_cache(maxsize=128)
def cached_api_call(endpoint, ttl_hash=None):
    """带TTL缓存的API调用"""
    # ttl_hash用于控制缓存过期
    resp = requests.get(endpoint)
    return resp.json()

def get_ttl_hash(seconds=300):
    """生成基于时间的hash，用于缓存过期控制"""
    return int(time.time() / seconds)