Connect the API
in 5 minutes

Install Claude Code

Node.js 18+ is required. Install via npm:

Copynpm install -g @anthropic-ai/claude-code

Create the configuration file

Create the file ~/.claude/settings.json (on Windows: %USERPROFILE%\.claude\settings.json) and paste the configuration below. Replace YOUR_API_KEY with your API key.

Copy{
  "env": {
    "ANTHROPIC_BASE_URL": "https://api.claude-popusk.shop",
    "ANTHROPIC_AUTH_TOKEN": "YOUR_API_KEY",
    "ANTHROPIC_MODEL": "claude-opus-4-8",
    "ANTHROPIC_SMALL_FAST_MODEL": "claude-sonnet-4-6",
    "ANTHROPIC_DEFAULT_SONNET_MODEL": "claude-sonnet-4-6",
    "ANTHROPIC_DEFAULT_OPUS_MODEL": "claude-opus-4-8"
  }
}

Alternative — export the environment variables manually:

Copyexport ANTHROPIC_BASE_URL="https://api.claude-popusk.shop"
export ANTHROPIC_AUTH_TOKEN="YOUR_API_KEY"

Run Claude Code in your project

Copycd /path/to/your/project
claude

Install Codex

Node.js 18+ is required. Install via npm:

Copynpm install -g @openai/codex

Edit the configuration file

Open (or create) ~/.codex/config.toml (Windows: %USERPROFILE%\.codex\config.toml) and add the lines below. Keep model and model_provider at the very top, above any [...] section. Replace YOUR_API_KEY with your key.

Copymodel = "claude-opus-4-8"
model_provider = "claude_pupusk"

[model_providers.claude_pupusk]
name = "Claude Popusk"
base_url = "https://api.claude-popusk.shop/v1"
experimental_bearer_token = "YOUR_API_KEY"

Restart Codex

Restart Codex to apply the configuration — and everything is ready to go.

Install the Cline extension

In VS Code open Extensions (Ctrl/Cmd + Shift + X), search for Cline and click Install.

Open API settings

In the Cline side panel click the gear icon and choose API Key as the authentication method.

Enter the connection parameters

• API Provider: OpenAI Compatible
• Base URL: https://api.claude-popusk.shop/v1
• API Key: your API key
• Model ID: e.g. claude-opus-4-8, gpt-5.5

Start chatting

Save the settings and pick your newly connected model from the model dropdown. Cline is ready to go.

Install Kilo Code

Find Kilo Code in the VS Code Marketplace and click Install.

Choose authentication — API Key

Fill in the provider parameters

• API Provider: OpenAI Compatible
• Base URL: https://api.claude-popusk.shop/v1
• API Key: your API key
• Model ID: e.g. claude-opus-4-8 or gpt-5.5

Get to work

Save the settings and switch the model in chat to the one you just added.

Install OpenCode

Via curl (recommended):

Copycurl -fsSL https://opencode.ai/install | bash

Or via npm:

Copynpm i -g opencode-ai

Create the config

Create the file ~/.config/opencode/opencode.json with the following contents:

Copy{
  "$schema": "https://opencode.ai/config.json",
  "provider": {
    "claude-popusk": {
      "npm": "@ai-sdk/openai-compatible",
      "options": {
        "baseURL": "https://api.claude-popusk.shop/v1",
        "apiKey": "YOUR_API_KEY"
      },
      "models": {
        "claude-opus-4-8": { "name": "claude-opus-4-8" },
        "claude-sonnet-4-6": { "name": "claude-sonnet-4-6" },
        "gpt-5.5": { "name": "gpt-5.5" }
      }
    }
  }
}

Don't forget to substitute your YOUR_API_KEY. The models list can be extended.

Run and switch model

Copycd /path/to/your/project
opencode

Inside OpenCode run the /models command and pick the model.

Install Roo Code

Find Roo Code in the VS Code Marketplace and install it.

Open provider settings

In the Roo Code side panel open Settings → Providers.

Fill in the parameters

• API Provider: OpenAI Compatible
• Base URL: https://api.claude-popusk.shop/v1
• API Key: your API key
• Model ID: e.g. claude-sonnet-4-6

Let's go

Save the settings. Pick your model from the chat header — and start writing tasks.