Marcel — Claude Code MCP server: French tax and pension
Marcel gives AI coding clients read-only tools for French tax, pension and asset-transfer calculations, with sourced rules attached to each result.
claude mcp add --transport http marcel https://marcel-retraite.fr/mcpWhat Marcel does
Marcel connects an AI client to a remote MCP service for French tax and retirement calculations. Its 11 read-only tools cover pension estimates, assurance-vie, PEA, securities accounts, PER exits, IFI, Dutreil transfers, buying versus renting, employment with retirement, plus result comparison and validation.
Each response includes the rules used, their version and a traceId. The service uses Streamable HTTP and does not require an API key. A local npx or Docker proxy only forwards requests to the remote endpoint; it does not calculate anything itself. The service allows 20 requests per minute per IP, and its outputs are informational rather than tax or investment advice.
What it helps with
- estimate a French retirement pension
- compare buying and renting a main home
- calculate tax for a PER or PEA exit
- check business-transfer scenarios
- validate and compare existing Marcel results
Example prompts for the agent
- Estimate my French retirement pension and show the rules used.
- Compare the tax impact of taking my PER as capital versus an annuity.
- Compare these two scenarios, then validate the returned results.
How to install Marcel
Platform CLI: remote server
claude mcp add --transport http marcel https://marcel-retraite.fr/mcpPlatform CLI: remote server
codex mcp add marcel --url https://marcel-retraite.fr/mcpConfig file
{
"mcpServers": {
"marcel": {
"url": "https://marcel-retraite.fr/mcp"
}
}
}Config file
{
"servers": {
"marcel": {
"type": "http",
"url": "https://marcel-retraite.fr/mcp"
}
}
}Platform CLI: remote server
gemini mcp add -t http marcel https://marcel-retraite.fr/mcpStep by step, with commands for each platform: How to add an MCP server to Claude Code, Codex, Cursor, VS Code, Gemini CLI and more
Questions about Marcel
How do I install Marcel in Claude Code?
Run claude mcp add --transport http marcel https://marcel-retraite.fr/mcp. No API key is required.
What does Marcel do?
Marcel provides 11 read-only tools for French tax, pension and related financial calculations. Results include the rules applied, their version and a traceId.
Does Marcel have a request limit?
Yes. The service allows 20 requests per minute for each IP address. Further requests return HTTP 429 with a Retry-After header.
