Is the twiceshy MCP server free to use?

Yes. twiceshy is listed on AllMCPs as a free, open Model Context Protocol server you can install into Claude Desktop, Cursor, or any MCP-compatible client.

Is the twiceshy MCP server free to use?

Yes. twiceshy is listed on AllMCPs as a free, open Model Context Protocol server you can install into Claude Desktop, Cursor, or any MCP-compatible client.

Twiceshy

Experience memory for coding agents: validated traps, fixes and dead-ends at decision time.

Quick Install

Automated & IDE Setup

Copy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.

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Manual Client & Custom JSON ConfigExpand JSON ▾

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claude_desktop_config.json

{
  "mcpServers": {
    "twiceshy": {
      "command": "npx",
      "args": [
        "-y",
        "https://twiceshy.app"
      ]
    }
  }
}

💡 Paste into ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows)

Documentation Overview

twiceshy

Once bitten, twice shy.

A self-hosted service that feeds hard-won engineering experience — issues, dead-ends, root causes, validated fixes — to LLM coding agents at decision time, so they stop repeating known mistakes on autopilot. Records are git-backed and provenance-aware; automatic retrieval applies a relevance floor so a weak match can return nothing.

Hosted alpha

The hosted instance runs at twiceshy.app — self-serve tokens, remote MCP endpoint https://api.twiceshy.app/. External contributions require a signed CLA before merge (ADR-0002).

How it works (the locked architecture)

Source of truth: git-backed markdown experience records (YAML frontmatter
- narrative) — format in docs/SCHEMA.md. The corpus is a separate versioned data product (twiceshy-corpus, ADR-0021); the engine ships a small frozen fixture (internal/testcorpus/) for tests.
Index: one derived, always-rebuildable SQLite file (FTS5 plus cached, pure-Go dense vectors for pull retrieval).
Retrieval: fingerprint-exact → BM25 → dense (RRF), stack-fingerprint filtered, hard cap k≤3 with a relevance floor — below it, nothing is injected.
Channels: push (Claude Code hooks → trap cards), pull (MCP tools over streamable HTTP), index (generated one-liners).
Trust: agent-proposed records are quarantined; promotion = sandbox fail-to-pass validation + human PR review. A new record IS a pull request.
Doctors: background jobs that dedup, staleness-check, re-execute repros (CI for memories), decay, and abstract.

Full rationale: docs/research/EXPERIENCE_SERVICE_RESEARCH.md and docs/adr/ADR-0001-architecture.md.

Status

The core service is available as a hosted alpha. For the canonical snapshot of what ships now and the current roadmap, see docs/NEXT_FEATURES.md; deployment and operating details live in docs/DEPLOY-public-alpha.md.

Development

make ci    # lint + race tests + coverage floor — what CI runs

See docs/CONVENTIONS.md and docs/CONTEXT.md first.

License

AGPL-3.0-only. Contribution and corpus licensing: docs/adr/ADR-0002-licensing-strategy.md.

Related MCP Servers

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Frequently Asked Questions about Twiceshy

Add the following block to your claude_desktop_config.json under mcpServers: "mcpServers": { "twiceshy": { "command": "npx", "args": ["-y", "twiceshy"] } }

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Technical Specs & Signals

CategoryKnowledge & Memory

37Quality signal: Fair · 37/100How this signal is calculated ▾

Server availabilityNot measured

Not scored for repo-hosted servers — we can't reach the running server, only its GitHub page. Hosted MCP endpoints are health-checked live.

Verified ownership10/20

Documentation & tools16/30

Adoption & activity2/15

Community engagement0/10

A guidance signal from public completeness & health data — not a user rating. New listings start lower and rise as they add docs, get verified, and grow adoption. Signals we can't observe for a listing are skipped, not counted against it.

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More in 🧠 Knowledge & Memory →Best MCP servers for Memory & Knowledge →Alternatives to Twiceshy →Install in Claude Desktop Install in Cursor Install in VS Code