Free AI APIs — No Credit Card Required

# 1. DeepSeek 官方直连 (OpenAI 格式, 注册即赠额度)
curl https://api.deepseek.com/v1/chat/completions \
  -H "Authorization: Bearer $DEEPSEEK_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "deepseek-chat", "messages": [{"role": "user", "content": "Hello!"}]}'

# 2. Cloudflare Workers AI (每日 10,000 Neurons 免绑卡额度)
curl https://api.cloudflare.com/client/v4/accounts/$CF_ACCOUNT_ID/ai/run/@cf/meta/llama-4-8b-instruct-scout \
  -H "Authorization: Bearer $CF_API_TOKEN" \
  -d '{"messages": [{"role": "user", "content": "Hello Llama 4!"}]}'

from openai import OpenAI

# 零门槛免绑卡：直接接入 DeepSeek 或 OpenCode Zen
client = OpenAI(
    api_key="YOUR_API_KEY",
    base_url="https://api.deepseek.com/v1", # 或 https://opencode.ai/zen/v1
)

response = client.chat.completions.create(
    model="deepseek-chat",
    messages=[{"role": "user", "content": "Hello from Python!"}],
)
print(response.choices[0].message.content)