Background AI Chat MCP Server
Server Configuration
Describes the environment variables required to run the server.
| Name | Required | Description | Default |
|---|---|---|---|
| BAC_HOST | No | HTTP/SSE bind address | 127.0.0.1 |
| BAC_PORT | No | HTTP/SSE port | 3456 |
| BAC_AUTH_KEY | No | Bearer token for HTTP/SSE mode | |
| BAC_DATA_DIR | No | Root data directory | ~/.bagidea |
| BAC_TRANSPORT | No | Transport mode (stdio or http-sse) | stdio |
| BAC_REDACT_PII | No | Opt-in PII redaction | false |
| BAC_SAKANA_URL | No | Sakana chat URL | https://chat.sakana.ai/ |
| BAC_MAX_SESSIONS | No | Max concurrent sessions | 5 |
| BAC_IDLE_TIMEOUT_MS | No | Idle timeout before auto-close (15 min) | 900000 |
| BAC_BROWSER_HEADLESS | No | Run Chrome headless | true |
| BAC_ALLOWED_USE_CASES | No | Comma-separated use cases | personal,internal |
Capabilities
Features and capabilities supported by this server
| Capability | Details |
|---|---|
| tools | {} |
Tools
Functions exposed to the LLM to take actions
| Name | Description |
|---|---|
| session_openA | Open a persistent Sakana chat session backed by headless Chrome. First call requires tosAccepted:true (machine-wide ack thereafter). Returns sessionId + rate limit. Anonymous mode only in P1. |
| session_closeA | Close a Sakana chat session and release its browser context. keepHistory:true (default) retains state.json + cookies for reuse. |
| session_listA | List all known Sakana chat sessions (active and idle). |
| chat_sendA | Send a message to an open Sakana chat session and receive the streamed reply. Incremental tokens are emitted as MCP logging notifications; the tool result carries the final answer. Pass signal:"abort" to interrupt. |
| chat_interruptA | Interrupt an in-flight Sakana chat send. Clicks the page stop button and returns partial text. The stream also terminates via the AbortSignal on the original chat_send call. |
Prompts
Interactive templates invoked by user choice
| Name | Description |
|---|---|
No prompts | |
Resources
Contextual data attached and managed by the client
| Name | Description |
|---|---|
No resources | |
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