CompletionKit vs MCP Openai
A side-by-side look at the CompletionKit and MCP Openai MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.
Verdict: choose CompletionKit for conversational ai work over a hosted endpoint; choose MCP Openai for conversational ai as a local process. You can also run both side by side in one mcpServers block.
Which MCP server should you choose?
Choose CompletionKit when
- You need dedicated capabilities in the Conversational AI domain.
- You prefer a remote HTTP/SSE transport.
- You have the keys it needs:
COMPLETION_KIT_ENCRYPTION_PRIMARY_KEY, COMPLETION_KIT_ENCRYPTION_DETERMINISTIC_KEY, COMPLETION_KIT_ENCRYPTION_KEY_DERIVATION_SALT, OPENAI_API_KEY, ANTHROPIC_API_KEY, OLLAMA_API_ENDPOINT, OPENROUTER_API_KEY.
Choose MCP Openai when
- You need dedicated capabilities in the Conversational AI domain.
- You prefer a local stdio subprocess transport.
- Its auth model fits you: API key required.
- You have the keys it needs:
OPENAI_API_KEY. - You want tools like
messages, model.
Feature & specification comparison
Rows where the two servers differ are marked.
| Spec | ||
|---|---|---|
| Category | Conversational AI | Conversational AI |
| Quality signal | 39/100 · Fair | 55/100 · Good |
| Install command | Confirmed | Confirmed |
| Transport | Remote HTTP/SSE | Local subprocess (stdio) |
| Auth | Not declared | API key required |
| Pricing | Not declared | BYOK (pay the provider) |
| Required env vars | COMPLETION_KIT_ENCRYPTION_PRIMARY_KEYCOMPLETION_KIT_ENCRYPTION_DETERMINISTIC_KEYCOMPLETION_KIT_ENCRYPTION_KEY_DERIVATION_SALTOPENAI_API_KEYANTHROPIC_API_KEYOLLAMA_API_ENDPOINTOPENROUTER_API_KEY | OPENAI_API_KEY |
| Verified owner | Community listing | Community listing |
| GitHub stars | 3 | 77 |
| Directory activity | 0 views 0 installs 0 upvotes | 5 views 0 installs 0 upvotes |
| Tools | Not listed | 2 |
| Full listing | View CompletionKit | View MCP Openai |
Tools & capabilities
CompletionKit tools
No tool names declared yet. Check the project README from the listing page.
MCP Openai tools 2
messagesArray of messages (required)modelWhich model to use (optional, defaults to gpt-4o)
Ready-to-paste client configs
Paste either block (or both) into your client config, e.g. claude_desktop_config.json or ~/.cursor/mcp.json. We only show a config when the install command is confirmed.
CompletionKit
{
"mcpServers": {
"completionkit": {
"url": "https://your-app.com/completion_kit/mcp"
}
}
}
MCP Openai
{
"mcpServers": {
"mzxrai-mcp-openai": {
"command": "npx",
"args": [
"-y",
"@mzxrai/mcp-openai@latest"
],
"env": {
"OPENAI_API_KEY": "YOUR_OPENAI_API_KEY_HERE"
}
}
}
}
Frequently asked questions
CompletionKit is categorized under Conversational AI and uses a remote HTTP/SSE transport. MCP Openai belongs to Conversational AI and uses a local stdio subprocess. Pick CompletionKit for conversational ai work and MCP Openai for conversational ai.
Copy the mcpServers block from the config section on this page into your client's config (for example claude_desktop_config.json or ~/.cursor/mcp.json), then fully restart the client.
CompletionKit has no declared pricing — check the project's own site. MCP Openai is bring-your-own-key: usage is billed by the API provider you supply a key for. Auth: api key required. If a server needs environment variables such as API keys, define them under the env key in your client's MCP config.
Yes. MCP clients support multiple servers: add completionkit and mzxrai-mcp-openai as separate keys in the same mcpServers object, and your assistant will call tools from either one.
On AllMCPs, CompletionKit has a quality signal of 39/100 (Fair) with 0 views, 0 installs and 3 GitHub stars. MCP Openai has 55/100 (Good) with 5 views, 0 installs and 77 GitHub stars.