07 · bridge · 02 systems # Bridges, brokers & protocolsConnective tissue: tool protocols and transports. Bridges attach agents to tools, data, and channels — tool protocols (MCP), memory servers, and transport bindings that expose an agent through chat or voice. For agents talking to agents, see agent communication. SEC.01 ## Systems in this category [Model Context Protocol Community / OSS · bridge Model Context Protocol is an open protocol for connecting agents and IDEs to tools and data sources through MCP servers. api · local/cloud · Open protocol (free)](https://www.agentlist.io/systems/mcp) [Instinct Community / OSS · bridge caution Instinct is a self-learning memory MCP server for coding agents — it observes repeated patterns, scores them by confidence, and promotes mature ones into suggestions it exports back to Claude Code, Cursor, Windsurf, Codex, and CLAUDE.md. api · local · Free (OSS, MIT)](https://www.agentlist.io/systems/instinct) SEC.02 ## Who it's for Teams extending agents with internal tools, or exposing an agent through Slack, Telegram, or voice. SEC.03 ## Tradeoffs Protocols are stable-ish; brokers and transports are early. None of these write code themselves — they make the agents that do more connected. FAQ ## Frequently asked ### What is a bridge protocol? Bridges attach agents to tools, data, and channels — tool protocols (MCP), memory servers, and transport bindings that expose an agent through chat or voice. For agents talking to agents, see agent communication. ### Who should use a bridge protocol? Teams extending agents with internal tools, or exposing an agent through Slack, Telegram, or voice. ### What are the tradeoffs of bridge protocols? Protocols are stable-ish; brokers and transports are early. None of these write code themselves — they make the agents that do more connected. ### Which bridge protocols are in the catalog? 2 as of 2026-09-25: Model Context Protocol (Community / OSS), Instinct (Community / OSS). ### What is the Model Context Protocol (MCP)? An open protocol for connecting agents and IDEs to tools and data sources through MCP servers. It is supported across Cursor, Claude Code, Cline, and many other entries in this catalog. ### How are bridges different from agent communication? Bridges are agent↔tool or agent↔channel — giving one agent new capabilities or a new surface. Agent communication is agent↔agent — discovery, messaging, and delegation between autonomous systems (A2A, Scout, multi-agent frameworks). Other categories - [01AI IDEs06](https://www.agentlist.io/categories/ai-ide) - [02IDE extensions & copilots10](https://www.agentlist.io/categories/ide-extension) - [03CLI & terminal agents15](https://www.agentlist.io/categories/cli-agent) - [04Cloud & autonomous agents05](https://www.agentlist.io/categories/cloud-agent) - [05Platforms & harness multiplexers01](https://www.agentlist.io/categories/platform) - [06Model routers & gateways02](https://www.agentlist.io/categories/model-router) - [08Agent communication & collaboration13](https://www.agentlist.io/categories/agent-communication) - [09Agent services15](https://www.agentlist.io/categories/agent-services) - [10Personal & always-on agents06](https://www.agentlist.io/categories/personal-agent) - [11AI employees & digital coworkers10](https://www.agentlist.io/categories/digital-employee) - [12On-call & ops agents07](https://www.agentlist.io/categories/ops-agent) - [13Browser & computer-use agents06](https://www.agentlist.io/categories/computer-use) - [14Research & analyst agents07](https://www.agentlist.io/categories/research-agent) - [15Voice & phone agents07](https://www.agentlist.io/categories/voice-agent) Examples: Model Context Protocol · Instinct. Entries are editorial records from seed 2026-09-25, not endorsements. --- Source: [Bridges, brokers & protocols — 2 compared | agentlist.io](https://www.agentlist.io/categories/bridge). This is the public page rendered as Markdown; interactive controls require the website.