streamable-httpupdated 1mo ago
Turn rough requests into sharp, structured prompts, right inside Claude, ChatGPT, or any MCP client.
What can you do with rtcf?
RTCF — 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: hello@happlen.com
Install
Add rtcf to your client. Pick the one you use.
claude mcp add --transport http rtcf https://rtcf.happlen.com/api/mcpcodex mcp add rtcf --url https://rtcf.happlen.com/api/mcp{
"mcpServers": {
"rtcf": {
"url": "https://rtcf.happlen.com/api/mcp"
}
}
}Add to `~/.cursor/mcp.json`, or `.cursor/mcp.json` for a single project.
{
"servers": {
"rtcf": {
"type": "http",
"url": "https://rtcf.happlen.com/api/mcp"
}
}
}Add to `.vscode/mcp.json` in your workspace.
{
"mcpServers": {
"rtcf": {
"url": "https://rtcf.happlen.com/api/mcp"
}
}
}Add to `claude_desktop_config.json`, then restart Claude Desktop.
{
"mcpServers": {
"rtcf": {
"serverUrl": "https://rtcf.happlen.com/api/mcp"
}
}
}Add to `~/.codeium/windsurf/mcp_config.json`.
2 tools
rtcf exposes 2 tools to a connected agent.
- improve_prompt
- Rewrites a rough request into the RTCF structure and returns a ready-to-use improved prompt
- build_prompt
- Weaves existing Role/Task/Context/Format parts into one clean prompt
Score
55 / 100
Adequate
- Documentation17/25
- Maintenance16/25
- Trust6/20
- Capability4/15
- Install experience12/15
- Documents what it does and how to connect
- Has a resolvable package or endpoint
- Exposes at least one tool, prompt or resource
- README has substantive content
- Includes a code example
- Documents its configuration
- Mentions credentials or security posture
- Last commit 50 days ago
- Has a release history
- Repository is not archived
- No licence detected
- Namespace verified in the official MCP registry
- Claimed by its owner
- Published under an organisation
- 2 tool(s) documented
- Provides prompt templates
- Provides resources
- 6 documented install method(s)
- Published to a package registry
- Offers a hosted endpoint — no local install
Version history
| Versions | Published |
|---|---|
| 1.0.0Latest | Jul 12, 2026 |