INDIVIDUAL MCP TOOL

list_tax_codes

List the product tax codes Quaderno supports (id, name, description) — used as the tax_code on products / tax calculations.

usefulapi.ionone authenticationAvailability not checked

LIVE ENDPOINT

https://quaderno.usefulapi.io/mcp

No auth detected

Connect to this endpoint to inspect the live schema for list_tax_codes and invoke it with your own arguments.

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Inferred read-only · medium confidence · heuristic, not a guarantee.

No write-capable action terms were found; this is not proof that invocation has no side effects.

CONNECT WITH APPROVAL

Review this server and its permissions before adding it. Secret placeholders must be set locally.

Codex

~/.codex/config.toml

[mcp_servers.quaderno-mcp]
url = "https://quaderno.usefulapi.io/mcp"
enabled = true

Claude Code

.mcp.json

{
  "mcpServers": {
    "quaderno-mcp": {
      "type": "http",
      "url": "https://quaderno.usefulapi.io/mcp"
    }
  }
}

Claude Desktop

Settings → Connectors → Add custom connector

Name: quaderno-mcp
Remote MCP URL: https://quaderno.usefulapi.io/mcp

Add this remote URL as a custom connector in Claude Desktop. Availability depends on the user plan and workspace policy.

Cursor

.cursor/mcp.json

{
  "mcpServers": {
    "quaderno-mcp": {
      "url": "https://quaderno.usefulapi.io/mcp"
    }
  }
}

Visual Studio Code

.vscode/mcp.json

Add to Visual Studio Code

{
  "servers": {
    "quaderno-mcp": {
      "type": "http",
      "url": "https://quaderno.usefulapi.io/mcp"
    }
  }
}

Generic MCP

Client-specific MCP configuration

{
  "name": "quaderno-mcp",
  "transport": "streamable-http",
  "url": "https://quaderno.usefulapi.io/mcp"
}

MCP Inspector

Run the official MCP Inspector locally and enter the indexed Streamable HTTP endpoint.

ping — Verify the API key and connection by pinging Quaderno.
calculate_tax — Calculate the correct tax rate/amount for a sale given the customer's location and product.
list_invoices — List invoices, newest first, with optional filters.
get_invoice — Fetch a single invoice by id (full object incl.
list_contacts — List contacts (customers/vendors), newest first.
get_contact — Fetch a single contact by id.
list_items — List products/items in the catalog, newest first.
get_item — Fetch a single product/item by id.