MCP Sequential Thinking Server
Official MCP reference server for structured step-by-step agent reasoning.
About
The official reference MCP server for sequential thinking. It gives agents a structured tool for working through problems step by step — each thought can revise or branch from earlier ones — which improves multi-step reasoning without any external side effects.
It is a pure reasoning aid: no filesystem, no network, no state beyond the session. Ships as @modelcontextprotocol/server-sequential-thinking on npm.
What it can do
- Structured sequential thought chains
- Thought revision and branching
- Session-scoped — no persistence, no side effects
- Improves multi-step reasoning quality
Setup
- Install Node.js 18+.
- Add to your MCP client config: command
npx, args["-y", "@modelcontextprotocol/server-sequential-thinking"]. - Restart the client.
Prerequisites
An MCP-compatible client; Node.js 18+.
Use cases
Works with
Trust score — 9/10
Scored 9/10 (verified tier). Official reference server, ~91k monorepo stars, actively maintained, npx package verified. Docked only for the mixed license state (MIT→Apache-2.0 transition). No side effects and no persistent state — minimal risk surface.
★ 91,183 GitHub stars
How the trust score is built
Full methodology →- Adoption · stars/downloads, log-scaled vs peers
- 9.2/10
- Maintenance · recency, releases, issue load
- 9.2/10
- Openness · license + docs
- 8.3/10
- Manual review · sanity read + red-flag check
- 9.0/10
- · 91,183 GitHub stars (log-scaled vs catalog peers)
- · last push 1d ago; 9 releases/12mo; 488 open issues
- · manual review: official reference; no side effects — pure reasoning tool; license: MIT transitioning to Apache-2.0 (project-wide relicense in progress; LICENSE file)
Sources
Every fact above was checked against these sources. Where a claim comes from the provider and couldn't be independently verified, the text says so.