HYTHE — coordination bus + shared truth for AI agent fleets — self-hosted MCP server + stdio bridge.
Connect Runs on your machine
claude mcp add hythe -e HYTHE_AGENT_ID=<HYTHE_AGENT_ID> -e HYTHE_AGENT_KEY_FILE=<HYTHE_AGENT_KEY_FILE> -e HYTHE_AGENT_AUTH_MODE=<HYTHE_AGENT_AUTH_MODE> -e API_KEY=<API_KEY> -e MCP_HOST=<MCP_HOST> -e MCP_PORT=<MCP_PORT> -- npx -y @hythe/[email protected]{
"mcpServers": {
"hythe": {
"command": "npx",
"args": [
"-y",
"@hythe/[email protected]"
],
"env": {
"HYTHE_AGENT_ID": "<HYTHE_AGENT_ID>",
"HYTHE_AGENT_KEY_FILE": "<HYTHE_AGENT_KEY_FILE>",
"HYTHE_AGENT_AUTH_MODE": "<HYTHE_AGENT_AUTH_MODE>",
"API_KEY": "<API_KEY>",
"MCP_HOST": "<MCP_HOST>",
"MCP_PORT": "<MCP_PORT>"
}
}
}
}{
"mcpServers": {
"hythe": {
"command": "npx",
"args": [
"-y",
"@hythe/[email protected]"
],
"env": {
"HYTHE_AGENT_ID": "<HYTHE_AGENT_ID>",
"HYTHE_AGENT_KEY_FILE": "<HYTHE_AGENT_KEY_FILE>",
"HYTHE_AGENT_AUTH_MODE": "<HYTHE_AGENT_AUTH_MODE>",
"API_KEY": "<API_KEY>",
"MCP_HOST": "<MCP_HOST>",
"MCP_PORT": "<MCP_PORT>"
}
}
}
}{
"servers": {
"hythe": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@hythe/[email protected]"
],
"env": {
"HYTHE_AGENT_ID": "<HYTHE_AGENT_ID>",
"HYTHE_AGENT_KEY_FILE": "<HYTHE_AGENT_KEY_FILE>",
"HYTHE_AGENT_AUTH_MODE": "<HYTHE_AGENT_AUTH_MODE>",
"API_KEY": "<API_KEY>",
"MCP_HOST": "<MCP_HOST>",
"MCP_PORT": "<MCP_PORT>"
}
}
}
}Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.
Tools
This server runs locally, so its tools are listed by your MCP client once it starts.
Environment variables
| Name | Description |
|---|---|
HYTHE_AGENT_IDRequired | Stable exact agent identity for this client lane; required so restarts and compaction cannot adopt another principal |
HYTHE_AGENT_KEY_FILEOptional | Optional path to one protected per-agent credential file: regular, non-symlink, owned by the client user, mode 0400 or 0600, containing one hya1 token. Never place the token itself in an environment variable. |
HYTHE_AGENT_AUTH_MODEOptional | Client authorization expectation: observe, mixed, or required (default observe). Move to mixed and then required only after this exact lane has a credential and passes /agent/whoami. |
API_KEYRequired, secret | Shared API key authenticating the bridge to your self-hosted HYTHE server (create a protected .env with: npx -y @hythe/[email protected] init --write-env --agent-id <agent-id>) |
MCP_HOSTOptional | HYTHE server host (default 127.0.0.1) |
MCP_PORTOptional | HYTHE server port (default 6174) |
Details
| Package | @hythe/[email protected] (NPM, stdio) |
| First published | 5 Sep 2026 |
| Last updated | 5 Sep 2026 |
| Registry name | dev.hythe/hythe |
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