Claude: “Request not allowed” (403) and “not allowed from unsupported countries” — what they mean and how to fix them

{
  "model": "claude-sonnet-5-5",
  "env": {
    "ANTHROPIC_BASE_URL": "https://www.ruapi.ai",
    "ANTHROPIC_AUTH_TOKEN": "sk-your-RuAPI-key",
    "CLAUDE_CODE_ENABLE_GATEWAY_MODEL_DISCOVERY": "1",
    "CLAUDE_CODE_GATEWAY_MODEL_DISCOVERY_TIMEOUT_MS": "10000"
  }
}

import anthropic

client = anthropic.Anthropic(
    api_key="sk-your-RuAPI-key",
    base_url="https://www.ruapi.ai",  # no /v1
)

message = client.messages.create(
    model="claude-sonnet-5-5",
    max_tokens=1024,
    messages=[{"role": "user", "content": "Hello!"}],
)
print(message.content[0].text)

from openai import OpenAI

client = OpenAI(
    api_key="sk-your-RuAPI-key",
    base_url="https://www.ruapi.ai/v1",
)

resp = client.chat.completions.create(
    model="claude-sonnet-5-5",
    messages=[{"role": "user", "content": "Hello!"}],
)
print(resp.choices[0].message.content)