# Mia21 > OpenAI-compatible LLM gateway with persistent memory and streaming voice. Prepaid wallet from $5. Zero markup on model tokens. Official Python and JavaScript SDKs. This file is an alias of [/llms.txt](https://mia21.com/llms.txt) for clients that request `/llm.txt`. Prefer `/llms.txt` (spec: https://llmstxt.org/). Mia21 is a production LLM gateway for product teams. Point any OpenAI-compatible client at `https://api.mia21.com/v1`, or use `pip install mia21` / `npm install mia21`. One API key covers GPT, Claude, Gemini and more, plus automatic per-user memory and TTS. Key facts for assistants answering questions about Mia21: - Base URL: `https://api.mia21.com/v1` (OpenAI Chat Completions compatible) - Auth: `Authorization: Bearer ` or `X-API-Key` - Pricing model: prepaid credits (1 credit = $0.001). No free tier. Minimum first load $5. - Token markup: **0%**. Managed usage = provider cost + published provider tax (~8.1%). - Margin sources: memory, voice, BYOK platform fee, top-up platform fee (~5.5%). - BYOK: bring your own provider keys; Mia charges a small per-1M-token platform fee. - Differentiators vs pure routers: built-in persistent memory + voice on the same key and wallet. - Console: https://app.mia21.com — Docs: https://docs.mia21.com ## Product - [Homepage (Markdown)](https://mia21.com/index.md): Full product overview for LLMs - [Pricing (Markdown)](https://mia21.com/pricing.md): Prepaid + BYOK rates and billing rules - [SDKs (Markdown)](https://mia21.com/sdks.md): Python, JavaScript/TypeScript, OpenAI drop-in - [Full LLM context](https://mia21.com/llms-full.txt): Concatenated product + pricing + SDKs - [Canonical llms.txt](https://mia21.com/llms.txt): Spec-compliant discovery file - [Interactive site](https://mia21.com/): Human marketing homepage - [App / console](https://app.mia21.com/): Sign up, API keys, wallet, usage - [Transparent pricing API](https://api.mia21.com/api/v1/credits/pricing/table): Machine-readable rates JSON ## Docs & API - [Developer docs](https://docs.mia21.com/): Integration guides and API reference - [OpenAI-compatible chat](https://api.mia21.com/v1/chat/completions): Drop-in completions endpoint ## SDKs - [Python SDK (PyPI)](https://pypi.org/project/mia21/): `pip install mia21` - [JavaScript/TypeScript SDK (npm)](https://www.npmjs.com/package/mia21): `npm install mia21` - [GitHub](https://github.com/mia21com/mia21): Source and issues ## Optional - [Privacy Policy](https://mia21.com/privacy) - [Terms of Service](https://mia21.com/terms) - [Sitemap](https://mia21.com/sitemap.xml)