About RTCF
RTCF is a hosted prompt-improving MCP server for people working with AI clients. It restructures rough requests into Role, Task, Context, and Format, with support for Thai and English.
Key features
- 01Rewrite requests into RTCF prompts
- 02Assemble existing RTCF prompt parts
- 03Thai and English support
- 04Hosted Streamable HTTP endpoint
Use cases
- 01Turn a rough request into a ready-to-use prompt
- 02Combine Role, Task, Context, and Format notes
MCP support
Exposes the improve_prompt and build_prompt tools through a hosted Streamable HTTP MCP endpoint. It can connect to Claude, ChatGPT, and other MCP clients.
Configuration
Remote servers need no local install. Pick your client, then copy the config or install in one click.
https://rtcf.happlen.com/api/mcpclaude mcp add --transport http rtcf https://rtcf.happlen.com/api/mcp{"mcpServers":{"rtcf":{"type":"http","url":"https://rtcf.happlen.com/api/mcp"}}}Open in Cursor{"servers":{"rtcf":{"type":"http","url":"https://rtcf.happlen.com/api/mcp"}}}Open in VS Code{"mcpServers":{"rtcf":{"type":"http","url":"https://rtcf.happlen.com/api/mcp"}}}{"mcpServers":{"rtcf":{"serverUrl":"https://rtcf.happlen.com/api/mcp"}}}Run commands in a terminal; paste JSON into the client’s MCP config and restart. Servers that need sign-in will prompt on first connect.
Tools
2| Parameter | Type | Required | Description |
|---|---|---|---|
| prompt | string | Yes | The rough prompt or request to restructure |
Details
From the project READMERTCF — Prompt Improver (Remote MCP Server)
Turn rough requests into sharp, structured prompts, right inside Claude, ChatGPT, or any MCP client.
RTCF rewrites a messy request into the four parts every strong prompt needs: Role, Task, Context, Format. Works in Thai and English. Free tier included (5 credits/day, no sign-up).
- Website: https://rtcf.happlen.com
- Setup guide: https://rtcf.happlen.com/docs
- By Happlen
Endpoint
This is a hosted (remote) MCP server. No installation, no OAuth setup:
https://rtcf.happlen.com/api/mcp
Transport: Streamable HTTP. On a paid plan, append your key: https://rtcf.happlen.com/api/mcp?key=rk_live_...
Tools
| Tool | What it does | Cost |
|---|---|---|
improve_prompt | Rewrites a rough request into the RTCF structure and returns a ready-to-use improved prompt | 1+ credit |
build_prompt | Weaves existing Role/Task/Context/Format parts into one clean prompt | Free |
Quick setup
Claude (web / desktop / mobile)
- Settings -> Connectors -> Add custom connector
- Paste
https://rtcf.happlen.com/api/mcp(leave OAuth fields empty) - In a chat, enable the connector and say: "Improve this prompt with RTCF, then answer it."
ChatGPT (paid plans, Developer mode)
- Settings -> Apps -> Advanced -> enable Developer mode
- Add a custom connector with the same URL
- Ask ChatGPT to use RTCF
Claude Code
claude mcp add --transport http rtcf https://rtcf.happlen.com/api/mcp
REST API
curl -X POST https://rtcf.happlen.com/api/v1/convert \
-H "Authorization: Bearer rk_live_..." \
-H "Content-Type: application/json" \
-d '{"prompt": "help me write an email to my professor"}'
Full API docs: https://rtcf.happlen.com/docs
ภาษาไทย
RTCF คือผู้ช่วยปรับพรอมต์สำหรับคนที่ใช้ AI แล้วไม่รู้จะพิมพ์อะไรดี วางคำขอคร่าว ๆ แล้วรับพรอมต์โครงสร้าง Role, Task, Context, Format กลับไปใช้ได้ทันที ใช้ฟรีวันละ 5 เครดิต ไม่ต้องสมัครสมาชิก ใช้ได้ทั้งบนเว็บ ใน Claude และ ChatGPT ผ่านลิงก์ MCP ด้านบน
Questions: [email protected]
Comments
New to MCP?
From what the protocol is to installing your first server, these answers cover most first questions.
An open protocol that defines how AI applications connect to external tools and data in a uniform way. Clients talk to the model; MCP servers provide tools, resources and prompt templates. They exchange standard messages, so one server can be reused by many clients.