silicon.mu

Setup guide.
Five minutes.

Pick your tool. You need your key, which starts with sk-silicon-. It is your balance, so don't share it.

Your two values

Every tool asks for the same two things.

Key

sk-silicon-... (the one I sent you)

Address

https://api.siliconmu.xyz

Some tools want the address with /v1 on the end: https://api.siliconmu.xyz/v1. Each section below says which.

Claude Code

  1. Install it if you haven't: npm install -g @anthropic-ai/claude-code
  2. Open a terminal and paste these four lines, with your key in the second one.

Mac and Linux

export ANTHROPIC_BASE_URL=https://api.siliconmu.xyz
export ANTHROPIC_AUTH_TOKEN=sk-silicon-your-key
export ANTHROPIC_MODEL=claude-opus-5-5
export ANTHROPIC_DEFAULT_HAIKU_MODEL=claude-sonnet-5-5

Windows (PowerShell)

$env:ANTHROPIC_BASE_URL="https://api.siliconmu.xyz"
$env:ANTHROPIC_AUTH_TOKEN="sk-silicon-your-key"
$env:ANTHROPIC_MODEL="claude-opus-5-5"
$env:ANTHROPIC_DEFAULT_HAIKU_MODEL="claude-sonnet-5-5"
  1. In the same terminal window, go to your project folder and run claude.
  2. Ask it something small, like "what files are in this folder?". If it answers, you're set.

These lines only last for that terminal window. To keep them, add the same lines to ~/.zshrc or ~/.bashrc on Mac and Linux. On Windows, use setx for each name.

If Claude Code asks you to log in or choose an account, you missed the exports. Close it, paste the lines again, and run claude from that window.

Cursor

  1. Open Cursor Settings, then Models.
  2. Find the OpenAI API Key box. Paste your sk-silicon- key there.
  3. Turn on Override OpenAI Base URL and paste the address with /v1:

Base URL

https://api.siliconmu.xyz/v1
  1. Click Add model and type a model name exactly, for example claude-opus-5-5. Add as many as you want from the list at the bottom of this page.
  2. Pick that model in the chat box and send a message.

Cursor's menus change often. If a box has moved, look for "OpenAI API key" and "base URL" in the Models settings.

Cline (VS Code)

  1. Open the Cline panel and click the settings icon.
  2. Set API Provider to OpenAI Compatible.
  3. Fill in the three boxes:

Cline settings

Base URL: https://api.siliconmu.xyz/v1
API Key:  sk-silicon-your-key
Model ID: claude-opus-5-5
  1. Click Done and send a message in the Cline chat.

Codex CLI

  1. Set your key as an environment variable (Mac and Linux):

Terminal

export SILICON_API_KEY=sk-silicon-your-key
  1. Open (or create) ~/.codex/config.toml and put this in it:

config.toml

model = "gpt-6.1-sol"
model_provider = "silicon"

[model_providers.silicon]
name = "silicon.mu"
base_url = "https://api.siliconmu.xyz/v1"
env_key = "SILICON_API_KEY"
  1. Run codex in your project folder.

Model names

Type these exactly.

claude-opus-5-5     best quality
claude-sonnet-5-5   cheaper
claude-fable-5-1
gpt-6-astra
gpt-6.1-sol         cheapest
grok-4.7

Rates are on the main page. Opus 5.5 gives the best results for the price.

If something fails

  1. "Invalid key" or 401: check for a missing character or a space at the end. Paste your key on the main page and press Check balance. If the balance shows, the key is fine and the problem is in the tool.
  2. "Model not found": the name is mistyped. Copy it from the list above.
  3. "Budget exceeded": your balance is used up. Top up by DM.
  4. Anything else: send me a screenshot on Instagram and I'll fix it with you.