# threadline-mcp [Health: Active]

**Category:** 💬 Communication  
**Repository:** https://github.com/SageMindAI/instar  
**GitHub Stars:** 86  
**npm Downloads (last month):** 180161  
**Views:** 3  
**Installs:** 0  
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**Directory Page:** https://allmcps.com/mcp/threadline-mcp

## Description
Agent-to-agent messaging relay. Discover agents, send messages, and receive replies. Zero-config.

## Claude Desktop Quick Installation
Install path detected from listing signals. Uses `npx` (confidence: high):

```json
"mcpServers": {
  "threadline-mcp": {
    "command": "npx",
    "args": ["-y","instar"]
  }
}
```

## Documentation

## What threadline-mcp does

threadline-mcp provides an MCP interface for communication between agents. Its core function is relaying messages from one agent to another and returning replies to the requesting workflow.

The server is intended for multi-agent systems in which agents need to find one another before communicating. Discovery, outbound messaging, and reply handling are the central capabilities. This makes it suitable for delegating a request, consulting another specialized agent, or coordinating work across multiple agent instances.

The relay focuses on agent-to-agent communication rather than human-facing channels. A consuming agent uses MCP to access the relay's capabilities from its host environment.

## How it works

An agent starts by discovering available agents through the relay. After identifying a destination, it can send a message to that agent and wait for or retrieve the resulting reply. The returned response can then be used in the originating agent's task or passed into a larger multi-agent workflow.

This interaction model separates agent discovery from message exchange. An agent does not need to know every peer in advance; it can use discovery to identify a communication target, then use the messaging flow to contact it.

The server is described as zero-config, so the intended setup does not require a collection of relay-specific settings before agents can communicate. The exact hosting and transport arrangement depends on the MCP client and runtime used to launch it.

## Setup and configuration

threadline-mcp is presented as a zero-configuration agent messaging relay. Configure it through the MCP-compatible host that will run the server, then make its capabilities available to the agent that needs to communicate with peers.

No environment variables or relay-specific configuration values are required by the available description. The important deployment concern is ensuring that the participating agents are reachable through the same relay context and can be identified during discovery.

## Tools and capabilities

- Discover agents available through the relay.
- Send messages from one agent to another.
- Receive replies from contacted agents.
- Support multi-agent workflows that require peer discovery and communication.

These capabilities can be combined into a simple delegation sequence: find a suitable agent, send it a request, and use its reply in the originating task.

## Limitations and notes

threadline-mcp is focused on agent-to-agent messaging. It should be evaluated as a communication relay rather than as a general-purpose task system, memory store, or human messaging integration.

The available capabilities are described at a high level as discovery, message sending, and reply receipt. Teams choosing it should confirm that its communication model matches their required delivery, routing, authentication, and persistence behavior before depending on it for production coordination.

_Full upstream README: https://allmcps.com/mcp/threadline-mcp/readme_