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Rtcf

Turns rough Thai or English requests into structured Role/Task/Context/Format prompts over a hosted MCP endpoint.

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Install Rtcf

Pick your client, then add it in one click or paste the config.

Streamable HTTP (Remote)
Server URL
https://rtcf.happlen.com/api/mcp

Remote servers are added in the app, not the config file: Customize → Connectors → Add custom connector, then paste this URL.

Overview

The rtcf MCP server turns rough requests into structured Role, Task, Context, and Format prompts. It exposes improve_prompt and build_prompt over Streamable HTTP, with a hosted endpoint that requires no local installation or OAuth setup. Reach for it when an agent needs to refine an incomplete request or assemble existing prompt components in Thai or English.

Use cases

  • Improve a rough task request before sending it to an AI model
  • Build one prompt from existing Role, Task, Context, and Format sections
  • Refine Thai-language requests into a structured prompt
  • Call prompt conversion from an application through the REST API

Key features

  • RTCF prompt restructuring
  • Role, Task, Context, and Format assembly
  • Thai and English support
  • Hosted Streamable HTTP endpoint
  • REST conversion API
  • Free daily credit tier

Tools3

What Rtcf lets your agent do. Expand a tool for its parameters.

Verified live~669 tokens of context

Security & health

What it can reach and how reliably it runs — from our own checks, not the maintainer’s claims.

ActiveLast checked Today

Recent health check succeeded.

8/8 checks healthy over the last 42d

What it can do

From the 3 tools this server returned when we ran it.

Handles credentials · 1Makes network requests · 2Read-only tools · 3

Observed 2026-10-16 in an isolated sandbox. A description of reach, not a security audit.

Adoption & maintenance

Factual signals from GitHub, npm, and our automated checks — not a rating.

Last commit3mo agoMost recent push to the default branch.
Tools exposed3Callable tools this server registers over MCP.

How Rtcf works

What the rtcf MCP server does

The rtcf MCP server helps AI users convert underspecified requests into prompts organized around four parts: Role, Task, Context, and Format. It supports Thai and English input, making it suitable for multilingual prompt workflows.

The service exposes two MCP tools. improve_prompt takes a rough request, restructures it into the RTCF pattern, and returns a prompt ready for use. build_prompt accepts existing Role, Task, Context, and Format material and combines those pieces into a single clean prompt.

How it works

rtcf runs as a hosted remote MCP server rather than a package that must be installed locally. MCP clients connect to the Streamable HTTP endpoint at https://rtcf.happlen.com/api/mcp. After the connection is enabled in a client, an agent can call the prompt tools during a conversation.

The improvement workflow is intended for incomplete or messy requests. The assembly workflow is for cases where the four prompt components already exist but need to be unified. The resulting text can then be used as the prompt for a separate task.

Setup and configuration

No local installation or OAuth configuration is required for the hosted endpoint. Add the endpoint as a custom MCP connector in a supported client. Claude’s setup uses Settings, Connectors, and Add custom connector; the OAuth fields can remain empty. ChatGPT users on paid plans can enable Developer mode under Settings, Apps, and Advanced before adding the same URL. Claude Code can register it with:

Terminal
claude mcp add --transport http rtcf https://rtcf.happlen.com/api/mcp

The free tier provides five credits per day without sign-up. improve_prompt consumes at least one credit per call, while build_prompt is free. Paid-plan users can append a key to the MCP URL, such as ?key=rk_live_....

Tools and capabilities

  • improve_prompt: Rewrites a rough request into a complete RTCF prompt.
  • build_prompt: Combines supplied Role, Task, Context, and Format sections.
  • Thai and English prompt processing.
  • Streamable HTTP access for remote MCP connections.
  • REST conversion endpoint at https://rtcf.happlen.com/api/v1/convert, authenticated with a bearer key.

The REST endpoint accepts a JSON body containing a prompt field and is documented separately by the project. It provides an alternative to invoking the tools through an MCP client.

Limitations and notes

The rtcf MCP server is a hosted service, so using it requires access to its remote endpoint. The free allowance is limited to five credits per day, and prompt improvement uses credits.

Read the full README View source on GitHub

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Frequently Asked Questions about Rtcf

rtcf is an MCP server that connects MCP-enabled AI clients to prompt-improvement tools for turning rough requests into Role, Task, Context, Format prompts. Its main tools are improve_prompt, which rewrites input, and build_prompt, which combines existing RTCF parts into a clean prompt. It supports Thai and English.

You do not install rtcf locally; add its hosted Streamable HTTP endpoint as a custom MCP connector. Use https://rtcf.happlen.com/api/mcp, leave OAuth fields empty, or register it in Claude Code with the documented HTTP transport command.

Yes, rtcf can be used from an MCP client that supports its Streamable HTTP endpoint. The README specifically documents Claude, ChatGPT, and Claude Code setup, while the hosted endpoint is presented for MCP clients generally.

rtcf provides five free credits per day without sign-up. The improve_prompt tool costs at least one credit per call, while build_prompt is free; paid users can provide a key in the endpoint URL.

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