Tallyfern Rates (Canada)

com.tallyfernv0.2.0Updated Oct 3, 2026

Read-only Canadian GST/HST rates, small-supplier check and CRA allowance rates, with CRA sources.

VerifiedStreamable HTTPWeb executableFinance

Overview

AI-generated overview

Read-only Canadian GST/HST rate lookups, small-supplier status checks, and CRA allowance rates with cited sources.

What it does
Provides read-only reference data on Canadian sales tax. It returns GST/HST rates, checks small-supplier status, and reports CRA allowance rates, each with CRA sources cited. No tools are listed in the manifest, so the exact tool set is not documented here.
When to use it
Useful when an assistant needs Canadian GST/HST rates or small-supplier determinations while preparing invoices, quotes, or tax notes. Worth adding if you want tax figures with CRA source references rather than model recall.
Requirements
Remote MCP endpoint at over streamable HTTP. No authentication, environment variables, or headers are declared, and no local package is needed. Network access to the endpoint is required.
Before you install
The manifest declares no authentication and no credentials, so nothing secret is requested. Treat the returned rates as reference data and confirm against current CRA guidance before filing or billing; the server is described as read-only, so it should not change your data.

Installation

In SourceWeft

  1. Open Tallyfern Rates (Canada) in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "rates": {
      "type": "http",
      "url": "https://mcp.tallyfern.com/mcp"
    }
  }
}

Tools

0
Tool metadata has not been indexed yet.

Version history

1
  1. v0.2.0LatestOct 3, 2026