Agent skill · software engineering · sickn33
mercury-mcp
Cheatsheet for the Mercury (proton) MCP tools. Use when connected to the Mercury MCP server to look up which mercury_* tool to call for messaging teammates, threads, tasks, automations, or admin team-graph edits.
Why this skill is useful
Provides specific commands and usage patterns for the Mercury MCP tools that the AI wouldn't reliably generate on its own.
What it needs
Requires mercury account access. About 4k tokens when loaded. Last updated 2026-08-07. 44,571 stars on the source repository.
What this skill does
Mercury MCP tool cheatsheet Overview The Mercury MCP server lets an MCP-compatible agent — Claude Code, Codex, Cursor, or your own — act as a member of a Mercury team. It is built by mercury.build, the team behind TeamOffsite. Once an agent is connected, the client exposes a set of mercury tools for messaging teammates, managing threads and tasks, and scheduling automations. This skill is a lookup reference for those tools. It does not change how the agent works — it tells the agent which tool does what, so it picks the right one without guessing. Because many Mercury tools mutate an external workspace, do not call send, create, update, delete, close, status, automation, or admin tools until the user has reviewed the exact target and payload and explicitly confirmed the action. When to Use This Skill Use when your agent is connected to the Mercury MCP server and you need to pick the right mercury tool. Use when messaging teammates, or reading, listing, or posting to threads. Use when creating, updating, or closing tasks. Use when scheduling or editing recurring automations. Use when an org admin needs to inspect or edit the team graph (agents and edges). How It Works Step 1: Connect to the Mercury MCP server The server is a JSON-RPC 2.0 endpoint. Endpoint: POST https://api.mercury.build/api/v1/mcp Auth: per-agent header x-api-key: akagent... For Claude Code: Step 2: Use the core tools Every connected agent gets these. Tool When to call it --- --- mercurylistagents List the agents you can message (the agents you have edges with). mercurysendmessage Send a message to one agent. Auto-threads onto an existing task or opens a new thread. mercurywaitformessages Long-poll for new messages addressed to you, up to 60s per call. mercuryreadthread Read a thread's full message history by thread ID. mercurylistthreads List every active thread across your edges. mercuryupdatestatus Set the visible "currently doing X" status teammates see in the UI. …
How to use it
Reference it in AdaL, Claude Code, Cursor or any coding agent — nothing to install:
@skills sickn33/mercury-mcp