Prompt Refiner MCP

Built openly by TechQuanta Community. Contributions are welcome through the repository's issues and pull requests.

An independent FastMCP server for Prompt Refiner's schema v1.3 one-prompt plus optional controls contract. It refines prompt intent, structure, constraints, and output instructions before a prompt reaches an LLM. It never calls an AI provider, reads local files, or runs generated prompts.

Run

python -m venv .venv
.venv\Scripts\activate
python -m pip install -e .
prompt-builder-mcp

MCP client configuration:

{"mcpServers":{"prompt-builder":{"command":"prompt-builder-mcp"}}}

Tools: get_schema, validate_brief, and build_prompt_variants.

Before connecting a client, inspect the server locally:

prompt-builder-mcp --list-tools
prompt-builder-mcp --schema

Horizon Deploy

Use the repository form with these values:

Field	Value
Server name	prompt-builder
Entrypoint	server.py
Requirements	requirements.txt
Transport	Streamable HTTP

The root server.py adds the src/ package path, binds to HOST (default 0.0.0.0) and PORT (default 8000), and serves the MCP endpoint at /mcp. It is intended for hosted deployment and does not replace the local stdio entry point.

For local HTTP testing:

python server.py

For a local stdio client:

prompt-builder-mcp