Protolink MCP Server

A lightweight Python runtime for local and distributed agent meshes.

The short version

ProtoLink is a lightweight, A2A-first Python framework for building pluggable agents and multi-agent systems. It began as an A2A-based alternative to chain-centric frameworks such as LangChain: instead of organizing an application around chains of model calls, ProtoLink treats each Agent as a self-contained runtime entity with identity, capabilities, lifecycle, tools, optional reasoning, and direct task-based communication.

• Pluggable by design — - compose an agent from independent modules instead of adopting a mandatory stack
• A small, stable API — - string aliases cover the common path; concrete implementations expose full control when needed
• Local first, distributed when needed — - develop with no network or provider, then move the same task contract to HTTP, SSE JSON-RPC, WebSocket, or gRPC
• Friendly to smaller models — - one-action-at-a-time inference, schema validation, JSON fallback, and deterministic flows reduce reliance on hidden prompt behavior
• Explicit and inspectable — - tool calls, delegation, task state, policy decisions, approvals, runtime events, traces, and reports have typed representations
• A2A at the core — - agents communicate through cards, tasks, messages, parts, and artifacts rather than framework-private graph state

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Maintainer setup documentation.