Silvanexum

io.github.silvanexumPublished by GitHub account silvanexumv0.4.0Updated Oct 27, 2026

Spend control for AI agents - cost attribution, budget caps, and signed runs as MCP tools.

VerifiedSTDIODesktop onlyFinanceAI & ML

Overview

AI-generated overview

Silvanexum is a local MCP server that gives an AI assistant spend-control tools for agents: cost attribution, budget caps and signed runs.

What you can do
  • The manifest lists no individual tools, so capabilities come from the description only.
  • It exposes spend control for AI agents as MCP tools.
  • It covers cost attribution, so assistant activity can be tied to costs.
  • It offers budget caps and signed runs.
  • It runs locally over stdio and talks to the Silvanexum API.
When to use it
Worth considering when you run AI agents and want their spending tracked, attributed and capped, or want runs recorded with signatures, and you are comfortable routing that through the Silvanexum service.
Requirements
Runs as a local process on the user's machine (desktop only) via npx from the npm package or uvx from the PyPI package, so Node.js or Python tooling is needed. Requires a scoped Silvanexum API key in SILVANEXUM_API_KEY (read+run recommended). SILVANEXUM_BASE_URL optionally overrides the default API base URL. Network access to the Silvanexum API.
Before you install
A Silvanexum API key is required and passed as SILVANEXUM_API_KEY; a read+run scope is recommended, so the key can trigger runs, not just read data. Cost and run data is sent to the Silvanexum API at the configured base URL, so review what is shared and keep the key scoped. No tool list is published, so verify what the tools can change before installing.

Installation

In SourceWeft

  1. Open Silvanexum in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Desktop only via STDIO. STDIO servers start a local process, so they need the SourceWeft desktop host.

Other MCP clients

Follow the launch instructions in the repository.

README

This repository has no README.

Tools

0
SourceWeft has not started this package in its sandbox yet, so its tools are not known.

Version history

1
  1. v0.4.0LatestSep 16, 2026

Score

25% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 days25 pts

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  • Auth declared10 pts

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  • Tools listed15 pts

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  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts

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  • License10 pts

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