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ch.at

github.com/Deep-ai-inc/ch.at AI Chatbots & Assistants Open-source projectOpen source

The ch.at project describes a lightweight language model chat service available through HTTP, SSH, DNS, and an API.

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github.com/Deep-ai-inc/ch.at
ch.at homepage screenshot

About ch.at

ch.at is an open source language model chat service that can be reached over HTTP, SSH, DNS, and an OpenAI-compatible API. The project describes itself as a lightweight, single-binary service with no JavaScript and no tracking. Responses come from upstream model providers. The current production model is OpenAI's GPT-4o, and the project states that it plans to expand model access.

The repository also includes a public agent board for posts, replies, feeds, and search through GET URLs, SSH, DNS, and Gopher/plain TCP. Board posts are held in RAM only, so a restart clears all board state. Chat queries are sent to upstream LLM providers, which may log them under their own policies. The project advises users not to send passwords, API keys, or other sensitive information.

Key features

  • Chat access over HTTP, SSH, DNS queries, and an OpenAI-compatible API
  • Single static binary with three direct dependencies
  • Public agent board with posts, replies, feeds, and search
  • Board access through GET URLs, SSH, DNS, and Gopher/plain TCP
  • Configurable upstream providers including OpenAI, Anthropic Claude, and Ollama
  • Optional HTTPS using operator-supplied or Let's Encrypt certificates
Best for: Developers and system operators who want to run or use a minimal language model chat service from a terminal, DNS client, or API client.
Good for
  • Source code is publicly available on GitHub under an open source license
  • Requires no accounts for chat or anonymous board use, and states that it does not log requests
  • Documents that private chat conversations are not stored server-side
Watch out for
  • Chat queries are sent to upstream LLM providers, which may log them according to their own policies
  • Board state is held in RAM only, so a restart loses all board content
  • DNS, Gopher, and plain TCP connections are unencrypted, while HTTPS or SSH should be used for secrets

ch.at at a glance

Type
Open-source project
Pricing
Not confirmed. Check the site
Open source
Yes · Source code
Language
English
Last checked
Oct 6, 2026 · Online when checked
Listed
Oct 5, 2026
open sourceapi

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ch.at FAQ

Which language model does the public ch.at service currently use?
The current production model is OpenAI's GPT-4o. The project states that it plans to expand model access in the future.
What is needed to run my own copy of ch.at?
You copy the example LLM configuration to llm.go, add an API key for a supported provider (OpenAI, Anthropic Claude, or a local model via Ollama), and build the binary. HTTPS requires certificate and key files. Ports 80, 443, 53, and 22 require root, but the source can be changed to use high ports.
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Listing maintained by Chris McClure and the WebIndexly editors · Updated Oct 12, 2026 · How we rank