Completion Kit MCP Server
Your prompts need tests too. It's the difference between "this prompt seems to work" and "this prompt scores 4.3 out of 5 across 200 inputs, up from 3.8 last version.". It is available as a remote MCP endpoint.
Teams that want a hosted AI & ML endpoint instead of running a local process. The project is written in Ruby.
VERIFIED ACTIVE
LAST COMMIT 2026-08-12 · ★ 3 · #89 OF 95 MAINTAINED AI & ML · VERIFIED 2026-08-25
NOASSERTION · Ruby · how we verify → /methodology
01 · Install Completion Kit
before you install - you'll need
Set COMPLETION_KIT_ENCRYPTION_PRIMARY_KEY, DATABASE_URL, SECRET_KEY_BASE before connecting.
Claude Code
claude mcp add homemade-software-inc-completion-kit --transport http https://completionkit.com/mcpClaude Desktop / Cursor / VS Code - add to config
{
"mcpServers": {
"homemade-software-inc-completion-kit": {
"url": "https://completionkit.com/mcp"
}
}
}Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.
Using another client? Same JSON, different key
Claude Desktop · mcpServers
Cursor · mcpServers
VS Code · servers
Windsurf · mcpServers
Zed · context_servers
Cline · mcpServers
Roo Code · mcpServers
Continue · mcpServers
LibreChat · mcpServers
Gemini CLI · mcpServers
Codex CLI · mcp_servers
Full setup guides: every client.
02 · Evidence
https://completionkit.com/mcp
transport: streamable-http
endpoint alive - responded to MCP initialize · probed 2026-08-25
Security posture
What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.
runs as remote - your agent's requests go to completionkit.com
endpoint auth accepted our unauthenticated MCP initialize - no credentials needed to connect
license no standard license detected - usage rights unclear; check the repo before commercial use
registry vendor namespace com.completionkit - domain-verified with the official MCP registry
03 · What Completion Kit can do
Prose above is summarized from the project's README and registry record - no invented capabilities.
Latest releases
v0.28.42 · 2026-08-12
Changed · The four dashboard stat cards now line their numbers up with each other. Each card pushed its value into the middle of whatever space was left over, so the value landed at a different height in every card…
v0.28.41 · 2026-08-12
Changed · A dashboard card with nothing to plot no longer draws an empty chart. The Checks card and the Activity card both rendered all fourteen bars whatever the data, and a bar for a day with no data is held at a…
v0.28.40 · 2026-08-12
Changed · The retry button on a run now says what it will actually retry, and it is no longer red. It read "Retry N failed cases" whatever had gone wrong, which implied regeneration even when the response was fine and…
04 · Who maintains Completion Kit
CompletionKit is maintained by homemade-software-inc. It's the only MCP server we track from this author; the repo dates to Mar 2026.
05 · Facts
- website
- https://completionkit.com/
- category
- AI & ML - ranked #89 of 95 actively-maintained AI & ML servers as of 2026-08-25.
- release cadence
- 10+ releases in the last 90 days (latest 2026-08-12)
- registry
- com.completionkit/evals (active, first published 2026-07-18)
06 · Completion Kit FAQ
What is Completion Kit?
Your prompts need tests too. It's the difference between "this prompt seems to work" and "this prompt scores 4.3 out of 5 across 200 inputs, up from 3.8 last version.". It is available as a remote MCP endpoint.
Is Completion Kit still maintained?
Yes - as of 2026-08-25, its last commit was 2026-08-12 and it shipped 10+ releases in the last 90 days. We re-verify nightly.
How do I install Completion Kit?
Run `claude mcp add homemade-software-inc-completi --transport http https://completionkit.com/mcp`. The README documents 3 environment variables (COMPLETION_KIT_ENCRYPTION_PRIMARY_KEY, DATABASE_URL, SECRET_KEY_BASE) to set first. Set COMPLETION_KIT_ENCRYPTION_PRIMARY_KEY, DATABASE_URL, SECRET_KEY_BASE before connecting. You can also paste the ready-made client config above.
Does Completion Kit require authentication?
No - the endpoint accepted our unauthenticated MCP initialize when probed on 2026-08-25; you can connect without credentials.
07 · Alternatives to Completion Kit
Alternatives to Completion Kit
Maintained AI & ML servers if Completion Kit isn't the fit.
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- Plan Exe MCP server for generating rough-draft project plans from natural-language prompts. ★ 397 · 2026-08-23
- PageIndex MCP Reasoning-based RAG system for chatting with long PDFs. Supports local and online files. ★ 380 · 2026-07-25
Pairs well with
Servers that cover what Completion Kit doesn't - only shown when the pairing reason fits the companion.
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