The CompletionKit MCP server,
connected in one click.
Prompt evals over MCP: run a prompt on your dataset, score each output 1-5 with an LLM judge. Connect the official CompletionKit MCP server to Claude, ChatGPT, or Cursor through gate — one gateway URL, no config files, security-checked.
Free to start · No credit card · No hosting needed
What your AI can do with CompletionKit
Real prompts you can type the moment it's connected — no setup, no docs to read.
“Use “prompts_list”: List all prompts.”
“Use “prompts_get”: Get a prompt by ID.”
“Use “prompts_create”: Create a prompt.”
“Use “prompts_update”: Update a prompt. If the prompt already has runs, this creates a new DRAFT version (current=false) rather than editing in place or publishing.”
How secure is the CompletionKit MCP server?
Every server in the gate directory has to pass the same four checks before your AI can touch it. Here's how CompletionKit holds up.
Official endpoint
Operated by CompletionKit (completionkit.com) at its documented MCP endpoint — not a third-party mirror or community re-host.
No sign-in needed
This server only exposes public data — no account and no credentials are involved when you connect.
Scanned before it goes live
gate checks every tool for prompt injection, hidden instructions, data-exfiltration hints, and over-broad permissions before the server is available through your gateway.
Watched for drift
If CompletionKit adds or changes tools later, gate re-scans and alerts you — before your AI acts on the change.
Connected in three steps
Connect your gate
Add one gateway URL to Claude, ChatGPT, or any MCP client. One-time setup, about two minutes.
Pick CompletionKit
Choose CompletionKit in the gate directory. No sign-in needed.
Use it anywhere
CompletionKit's tools are live in every AI client you've connected — with rules and logging built in.
Free to start · No credit card · No hosting needed
The actual tools CompletionKit exposes
Fetched live from the official endpoint and re-checked daily by gate — not marketing copy.
prompts_list — List all prompts
prompts_get — Get a prompt by ID
prompts_create — Create a prompt
prompts_update — Update a prompt. If the prompt already has runs, this creates a new DRAFT version (current=false) rather than editing in place or publishing
prompts_delete — Delete a prompt
prompts_publish — Publish a prompt version, making it the current version
prompts_suggest_improvement — Suggest an improved version of a prompt, grounded in a run's test results and judge feedback. Analyzes the run's responses, scores, and revi
runs_list — List all runs
+ 46 more tools once connected
The CompletionKit MCP server at a glance
https://completionkit.com/mcpQuestions, answered
Is there an official CompletionKit MCP server?
Yes — CompletionKit operates its own remote MCP server at completionkit.com. gate connects you to that official endpoint and adds security scanning, per-tool access rules, and an activity log on top.
How do I connect CompletionKit to Claude or ChatGPT?
Add gate's gateway URL to your AI client once, then pick CompletionKit in the directory. No account or sign-in is needed. From then on, CompletionKit's tools are available in every client you've connected to gate.
Do I need to host anything?
No. CompletionKit runs the server, and gate is fully managed. You just connect one URL — there's nothing to install, deploy, or maintain.
Is the CompletionKit MCP server safe to connect?
It's the vendor's official endpoint, and gate scans its tools for prompt injection and hidden instructions before it goes live, re-checks it whenever it changes, and lets you allow, block, or require approval for every single tool.
Is it free?
Yes — you can get started with gate for free and connect CompletionKit in minutes. No credit card required.
Connect more than just CompletionKit
Every server below works through the same gateway URL — connect once, add tools anytime.
Squarespace DomainsDesignView →Set up CompletionKit in: Claude · Claude Code · ChatGPT · Cursor · VS Code