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MiMo Code API Key Setup — Terminal Coding Agent Guide

Learn how to configure APIMaster.ai as a custom OpenAI-compatible API in Xiaomi MiMo Code. Run mimo, use /connect, choose Other providers and Custom provider, set Base URL https://apimaster.ai/v1 and your API key, then use GPT-5.4, Claude Sonnet 4.6, DeepSeek and more at below-official pricing.

MiMo Code (Xiaomi terminal AI coding agent / MiMoCode CLI) connects third-party LLMs via /connect. APIMaster.ai provides an OpenAI-compatible API at https://apimaster.ai/v1 — add a Custom provider with your API key to call Claude, GPT, DeepSeek and other marketplace models without editing config files by hand.

This guide covers: install → mimo launch → /connect wizard → Provider id / Base URL / API key → model ids → test chat.

Get an API Key first. Paste the key only inside MiMo Code; never share it in chat or screenshots.

Prerequisites

  1. A modern terminal (see MiMo Code install guide).
  2. MiMo Code CLI installed.
  3. An APIMaster API Key from the console.

Step 1 — Install MiMo Code

macOS / Linux:

curl -fsSL https://mimo.xiaomi.com/install | bash

Windows:

npm install -g @mimo-ai/cli

See Install & launch for details.

Step 2 — Launch and run /connect

mimo

Inside MiMo Code, run /connect (or type /con and pick Connect provider).

/connect command

Step 3 — Other provider → Custom provider

  1. On Select provider, choose Other providers (not Xiaomi official or MiMo Auto free channel).
  2. On Connect a provider, choose + Custom provider.

Other providers

Custom provider

Step 4 — Six-step wizard

Step Field Value
1/6 Provider id apimaster
2/6 Display name apimaster or APIMaster.ai
3/6 Base URL https://apimaster.ai/v1 (include /v1)
4/6 API key Your APIMaster key
5/6 First model id e.g. gpt-5.4 or claude-sonnet-4-6 (marketplace ids)

Provider id

Display name

Base URL

API key

First model id

Press Enter to submit each step; Esc to cancel.

Step 5 — Add more models (optional)

In the apimaster provider menu, use + Add model for additional ids (gpt-5.5, claude-opus-4-8, …).

Model list

Select the model to use (e.g. gpt-5.4). Connect provider ctrl+a switches providers.

Select model

Step 6 — Test chat

Confirm the status line shows your model (e.g. Build · gpt-5.4), send hello, and verify a normal reply.

Test chat

Troubleshooting

Issue Fix
/connect not found Run inside mimo; type / for command list
Change API key in MiMo Code Re-run /connect or edit the apimaster provider
401 / invalid key Re-copy key from console
Base URL error Use https://apimaster.ai/v1 exactly
Which model id to use Match marketplace ids, e.g. gpt-5.4, claude-sonnet-4-6
No model response Match marketplace model id; try API connectivity test

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