# Project Parva

A read-only MCP server that hands your agent a Nepali calendar: BS to AD conversion, holidays, working days, fiscal-year rules, Panchanga, each with its source.

- MCP server · `type=mcp` · Claude Code, Codex, Cursor, GitHub Copilot, Windsurf (Devin Desktop), Cline, Zed, Gemini CLI · ★ 26
- Author: dantwoashim
- License: AGPL-3.0 · policy=link-only · description only; the file stays with the author
- Source: https://github.com/dantwoashim/Project_Parva
- Updated: 2026-10-23
- HTML: https://affpapa.org/en/nevibecode/mcp/project-parva

## What it does

The agent gets callable tools for Bikram Sambat work: shifting dates between BS and AD, checking that a BS date exists, month metadata, holiday and working-day lookups, Nepal fiscal-year logic. Panchanga has its own group — sunrise, tithi, nakshatra, yoga, karana, paksha, vara. Nothing writes. Every tool reads.

Provenance is what the project is built around. A result names its source and method, and exact findings stay apart from ones still waiting on a check. So a date deep in the future BS range never comes back looking settled. The repo carries public fixtures and a conformance runner, `tools\conformance_runner\run.py`, called through `py -3.11`.

Docker is non-negotiable here: the install runs `ghcr.io/dantwoashim/parva-mcp-server:1.0.0` as a container, and without it the add command has nothing to start. Licensing is AGPL-3.0, so putting this inside a closed product means working through the commercial terms the repo keeps in a separate document.

## Requirements
- Needs: Docker

## Install

### Claude Code (native platform)

**Platform CLI**
```bash
claude mcp add project-parva -- docker run -i --rm ghcr.io/dantwoashim/parva-mcp-server:1.0.0
```

### Codex

**Platform CLI**
```bash
codex mcp add project-parva -- docker run -i --rm ghcr.io/dantwoashim/parva-mcp-server:1.0.0
```

### Cursor

**Config file**
File `.cursor/mcp.json`:
```json
{
    "mcpServers": {
        "project-parva": {
            "command": "docker",
            "args": [
                "run",
                "-i",
                "--rm",
                "ghcr.io/dantwoashim/parva-mcp-server:1.0.0"
            ]
        }
    }
}
```

### GitHub Copilot

**Config file**
File `.vscode/mcp.json`:
```json
{
    "servers": {
        "project-parva": {
            "type": "stdio",
            "command": "docker",
            "args": [
                "run",
                "-i",
                "--rm",
                "ghcr.io/dantwoashim/parva-mcp-server:1.0.0"
            ]
        }
    }
}
```

### Gemini CLI

**Platform CLI**
```bash
gemini mcp add project-parva docker run -i --rm ghcr.io/dantwoashim/parva-mcp-server:1.0.0
```

## When to use it
- move a date from BS to AD without maintaining your own month table
- reject a BS date that does not exist before the datepicker accepts it
- count working days around Nepali holidays for a payroll month
- place a booking on the right side of the Nepal fiscal-year boundary
- get tithi and nakshatra for one specific day

## Example prompts
- Convert `2078-01-01` from BS to AD and show the source and method fields the server returned.
- Check `2078-13-01` — is that a valid BS date, and which rule rejects it?
- Give me Nepal holidays and working days for `2078-05` so I can close the payroll period.

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