In-depth architectural comparison of the Royalmail MCP and Easypost MCP servers. Compare execution transports, security boundaries, tool capabilities, quality scores, and ready-to-paste client installation snippets for Claude, Cursor, Windsurf, and VS Code.
At a Glance & Executive Verdict
Royalmail MCP
Delivery · Local stdio
Quality: 59/100 (Good) | Auth: API Key required
Easypost
Delivery · Remote HTTP/SSE
Quality: 51/100 (Good) | Auth: No auth required
Verdict Summary: Choose Royalmail MCP if you need specialized Delivery tools running via a local process. Choose Easypost if your workspace requires Delivery integration with remote web transport. Both servers can be configured concurrently in your client's mcpServers manifest.
Which MCP Server Should You Choose?
Choose Royalmail MCP when:
You need dedicated capabilities in the Delivery domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: API Key required (Free / Open Source).
You have access to required keys: RM_API_KEY, RM_BASE_URL.
Book, label, track and cancel Royal Mail and Parcelforce shipments. 33 UK and international services via friendly keys or raw Service Register codes. npx royalmail-mcp.
Book a Royal Mail shipment via Click & Drop. Returns an orderIdentifier used to retrieve the label.
get_label
Get the shipping label for a Royal Mail Click & Drop order and save it to disk. Works for any order you have previously booked — pass its orderIdentifier. Default save location is ~/Downloads/parcel-toolkit/, overridable via the PARCEL_TOOLKIT_LABELS_DIR env var.
book_batch_and_label
Book multiple Royal Mail orders at once and return a single merged PDF containing every label, ready to print. Use this when the user pastes a list of orders/addresses. All orders share the same service, package format and sender. Saves the merged PDF to ~/Downloads/parcel-toolkit/ (overridable via PARCEL_TOOLKIT_LABELS_DIR).
track_order
Get the current status and tracking details for a Royal Mail Click & Drop order.
cancel_order
Ready-to-Paste Client Configurations
Paste either (or both) of these JSON server blocks into your client config file (e.g. claude_desktop_config.json or ~/.cursor/mcp.json).
Royalmail MCP is categorized under Delivery and uses a local stdio subprocess. In contrast, Easypost belongs to Delivery using remote streaming HTTP/SSE transport. Select Royalmail MCP when you need capabilities focused on delivery and Easypost when you require tools for delivery.
Cancel a Royal Mail Click & Drop order. Must be done before the order is manifested/despatched.
list_services
List supported Royal Mail and Parcelforce services with their Service Register codes. Availability depends on your Click & Drop account.
Easypost Tools (2)
easypost_rates
Get shipping rate quotes from `<from_zip>` to `<to_zip>` for a parcel — returns multi-carrier rates (USPS, UPS, FedEx, etc.) with price, service level, and estimated delivery days. Example: easypost_rates({ from_zip: "94105", to_zip: "10001", weight_oz: 16, _apiKey: "your-key" })
easypost_track
Track a package by tracking number — returns current status, carrier, estimated delivery date, and recent scan events. Example: easypost_track({ tracking_code: "9400100000000000000000", carrier: "USPS", _apiKey: "your-key" })