Privacy-first
AI Chat Workspace BYOK, MCP tool & Chat Presets

Multi-Provider Support: Connect to any model via OpenAI/Anthropic-compatible APIs, including local models
Chat Presets: Save prompt, model, parameter, and tool as reusable presets. Switch between them with one tap to boost your workflow efficiency
MCP protocol support: MCP integration for third-party tool calling
Fine-tune Parameters: Shape every response with precise, flexible controls
Live Streaming: Real-time typewriter animation rendering with LaTeX formulas and Markdowns
Customize themes and colors: Set your theme and colors exactly the way you like

Download on the App Store Coming soon Mac App Store

New Chat

Chat Preset

Daily Talk Research Translator

Tap a preset to load model, prompt & tools

How to choose the best mortgage plan in the US in 2026 — fixed vs. variable?

Reasoning 0.5s

The right plan depends on how long I'll stay in the home. I'll pull today's rates from Freddie Mac, then run the amortization on a $500k loan to compare monthly payment and total interest for a 30-year fixed, 15-year fixed, and 5/1 ARM.

web_search 1.2s

{ "query": "current US mortgage rates August 2026", "max_results": 5 }

Freddie Mac PMMS · 30-yr 6.69% · 15-yr 6.01% · ARM 6.51%

Plan	Rate	Payment	Interest
30-yr fixed	6.69%	$3,223	$660k
15-yr fixed	6.01%	$4,222	$260k
5/1 ARM	6.51%	$3,163	$639k

Monthly payment on a $500k loan:

M = P·r(1+r)ⁿ / ((1+r)ⁿ − 1)

Amortization in Python:

Daily Talk ▸ Ollama · Qwen3.6-35B-A3B

10:24

↓ 19 ↑ 240 43.1 tok/s 5.6 s

Type a message...

Chat Presets · Live streaming · LaTeX · Tables · Code

Bring Your Own Key

Any model. One place.

OpenAI, Anthropic, Gemini, DeepSeek, Mistral — or any OpenAI-compatible endpoint
Bring your own key: stored in Apple Keychain, never on our servers
Auto-fetch available models from any base URL
Every chat stays on your device with SwiftData

Add Provider BYOK

Choose a provider

OpenAI api.openai.com/v1

Anthropic api.anthropic.com

Google Gemini generativelanguage.googleapis.com

DeepSeek api.deepseek.com

OpenAI Compatible Any base URL

+ OpenRouter, Mistral, Groq, LM Studio, and more

OpenAI Compatible

Base URL http://localhost:11434 Ollama

API Key Optional · not required

Fetched 3 models Ollama · localhost:11434

Models

qwen3.6:35b-a3b35B · 3B active

llama3.3:70bGeneral purpose

deepseek-r1:32bReasoning

Chat Preset

One tap, a different expert.

Save model, prompt, parameters, and tools as a named preset
Flip from Research to Translator in one tap — no reconfiguring
Prompt variables — {{current_date}}, {{current_time}}, {{model_id}} resolved when you send

Chat Preset 1 Tap

Presets

Prompt "Act as a research analyst. Cite sources and flag uncertainty."

Variables {{current_date}} → 2026-08-13

Model gpt-4o

Temperature 0.4

Tools web_search fetch

Model · prompt · params · tools + New Preset

MCP Tools

Plug your AI into the real world.

Connect any MCP server — hundreds of ready-made tools, or your own
Bearer-token and custom-header authentication
Validate the connection and auto-discover available tools

MCP JSON-RPC

Server Details

Name web-tools

URL https://tools.local/mcp Example

Transport Streamable HTTP · SSE

Authentication

Type Bearer Token

Bearer Token ••••••••••••••••

Connect

Connected to web-tools Fetched 3 tools · protocol 2026-07-28

Tools

web_search_exaExa · Neural web search

web_fetch_exaExa · Fetch as clean markdown

batch_searchAnySearch · Parallel queries

Who won the 2026 Fields Medal?

web_search_exa 2.4s

{
  "query": "2026 Fields Medal winners",
  "numResults": 3
}

{ "results": 3, "top": "Fields Medals 2026 — IMU", "url": "https://www.mathunion.org/imu-awards/fields-medal/fields-medals-2026" }

web_fetch_exa 1.6s

{
  "urls": [
    "https://www.mathunion.org/imu-awards/fields-medal/fields-medals-2026"
  ],
  "maxCharacters": 3000
}

{ "title": "Fields Medals 2026 — IMU", "excerpt": "Awarded to Yu Deng, John Pardon, Jacob Tsimerman and Hong Wang." }

Parameters

Fine-tune it all, in your own way.

Temperature, Top P, Top K, Min P, Max Tokens
Reasoning effort: Low / Medium / High for supported models
Presence & frequency penalty, seed, stop sequences
Or drop in provider-specific JSON when you need to go deeper

Session Parameters Fine control

Temperature 0.7

Top P 0.9

Max Tokens 2048

Reasoning Effort LowMediumHigh

Presence Penalty 0.2

Frequency Penalty 0.5

Stop Sequences </output>

Per session or preset Provider JSON

Appearance

Make it yours, native SwiftUI.

Light, dark, or auto — match your system
Nine accent colors, or pick any custom color
Adjustable font size: small, medium, or large
Built with SwiftUI — feels at home on iPhone and iPad (Mac coming soon)

Appearance Settings

Mode

Accent

Font size

FAQ

Common questions

What is an AI chat app with BYOK and MCP tools?

It's an AI chat app where you bring your own key (BYOK) to connect any provider — OpenAI, Anthropic, Gemini, DeepSeek, or local models — and enable MCP servers so the assistant can act as an agent with tools like web search and fetch. Chat Presets let you switch model, prompt, and tools in one tap.

Do you store my chats or API keys?

No. API keys stay in Apple Keychain. Conversations stay on your device. BayesChat has no account system and no cloud that receives your chats.

What does BYOK mean?

Bring your own key. You connect providers with your own API key and pay them directly. We do not resell tokens or sit in the middle of your requests.

Which devices and providers are supported?

Available now on iPhone and iPad; Mac is coming soon. Use OpenAI, Anthropic, Gemini, OpenRouter, DeepSeek, Mistral, LM Studio, Ollama, or any OpenAI-compatible endpoint with a custom URL.

Do I need to create an account to use BayesChat?

No. There is no account system — just add your provider and API key and start chatting. Your chats stay on your device, so nothing is tied to your identity.

Can I import or export my chat history?

Yes. You can export conversation history for backups or sharing. History is stored locally on your device via SwiftData.

Is there an Android or Windows version?

Not yet. BayesChat currently supports iPhone, iPad, and Mac. We focus on Apple platforms first and may expand to other platforms later.

Can I get started without any technical setup?

Yes. Just add a provider, paste your API key, pick a model, and send a message. For a local model such as Ollama, set its custom base URL and tap Verify.

What is MCP?

Model Context Protocol. You can add MCP servers so the model can use external tools such as web search, fetch, or your own JSON-RPC tools — enabled per chat.

Contact Us

Questions or feedback?

Email us about bugs, feature requests, or anything else. We read every message.

bayeschat@gmail.com Follow us on X

Privacy-first AI Chat Workspace BYOK, MCP tool & Chat Presets