Prince of Post MCP

A remote MCP server that converts Royal Mail QR codes (from Vinted, eBay, ASOS returns) into printable 6x4 shipping labels. It supports file uploads read locally in the browser or direct QR text input, enabling agents to generate labels without queuing at post offices.

Visit Prince of Post

Endpoint and access

No sign-in to connect and list tools. Individual tools may still need a vendor account, credentials, or permissions; check the documented prerequisites.

Vendor evidenceStreamable HTTPNo sign-inEndpoint checked 2026-11-07Operated by Prince of Post

MCP endpoint (Streamable HTTP)

https://princeofpost.com/mcp

Vendor documentation

What its tools do

1 tool, grouped by the hints the server advertises. Hints are self-declared, not verified behavior.

Read-only (1)

create_royal_mail_label

1 of 1 have a description · 1 of 1 declare behavior hints · 1 of 1 with parameters document them all

Checks and signals

Each line is separate evidence, not a trust score.

Passed Endpoint answered the live check · Nov 7, 2026, 6:24 PM UTC
Passed Official MCP Registry namespace is tied to princeofpost.com · Nov 7, 2026, 6:04 PM UTC
Passed Endpoint is on the registry namespace domain · Nov 7, 2026, 6:04 PM UTC
Availability 1 of 1 checks passed in 30 days

What you can do with it

Convert Royal Mail QR codes from Vinted, eBay, or ASOS returns into printable labels
Generate 6x4 shipping labels for home printing via AI assistants
Allow agents to download labels as PDFs or open print dialogs

Source and maintenance

Vendor evidenceRegistry 1.0.1

mcp-registry: com.princeofpost/label-maker@1.0.1 Project website

Protocol and capabilities

Server: princeofpost 1.0.0
MCP protocol negotiated in check: 2025-11-25
Tools: 1 advertised
Resources: 1 advertised
Resource templates: 0 advertised
Prompts: Not advertised

Server-advertised capabilities

{
  "tools": {
    "listChanged": false
  },
  "resources": {
    "listChanged": false
  }
}

Server-provided instructions

Untrusted server output shown for inspection. It is not Koskamo guidance and is excluded from knowledge search.

Prince of Post turns a Royal Mail QR code (the kind shown at a Post Office counter) into a printable 6x4 label. Use create_royal_mail_label. When the user has a screenshot, photo or PDF of the QR code, call it with no arguments: a panel lets them pick the file, which is read on their device. Never transcribe a QR code from an image. Pass qr_text only when you have the exact text a QR decoder returned.

Tools

1 advertised

create_royal_mail_label — Print a Royal Mail QR code as a label

Advertised by the server during the last successful anonymous check.

Advertised read-only

Turns a Royal Mail QR code (the kind you show at a Post Office: Vinted digital labels, eBay Royal Mail QR codes, ASOS returns and other Royal Mail "Labels to Go" QR codes) into a 6x4 shipping label the user can print at home instead of queuing. If the user has an image or PDF of the QR code, call this with no arguments: a panel lets them pick the file, which is read on their device. Only pass qr_text if you already have the exact decoded text from a QR decoder. Never transcribe a QR code from an image.

create_royal_mail_label input schema

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "qr_text": {
      "type": "string",
      "maxLength": 4000,
      "description": "The exact text a QR decoder returned for the QR code, unchanged, including every space. It is fields like QRCode=..., 1DBarcode=... and SendersDetails=... separated by |. Omit this if you only have an image of the QR code."
    }
  }
}

create_royal_mail_label output schema

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "status"
  ],
  "properties": {
    "postBy": {
      "type": "string",
      "description": "The date to post the parcel by, dd/mm/yyyy."
    },
    "status": {
      "enum": [
        "ready",
        "needs_file"
      ],
      "type": "string",
      "description": "ready: the label was made from qr_text. needs_file: the user still has to pick their QR code in the panel."
    },
    "siteUrl": {
      "type": "string",
      "description": "Prince of Post, where the user can drop their QR code if the panel does not appear."
    },
    "postcode": {
      "type": "string",
      "description": "Last line of the delivery address, normally the postcode."
    },
    "printUrl": {
      "type": "string",
      "description": "Opens the label on Prince of Post, ready to print at its true 6x4 size."
    },
    "recipient": {
      "type": "string",
      "description": "First line of the delivery address."
    },
    "trackingNumber": {
      "type": "string"
    }
  },
  "additionalProperties": false
}

create_royal_mail_label annotations

{
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}

Prompts

Not advertised

No prompt definitions available.

Resources

1 advertised

Prince of Post

Advertised by the server during the last successful anonymous check.

Lets the user pick their Royal Mail QR code on their device and turns it into a printable 6x4 label.

Prince of Post URI

ui://princeofpost/label-maker.html

MIME type: text/html;profile=mcp-app

90-day uptime

A lightweight connection check about every six hours, sampled on hosts with many listings. It shows the server answered, not that its tools work.

Too few checks for a percentage yet (1 of 1 answered).

2026-11-07: 1 of 1 checks answered

30-day availability

Aggregated from read-only remote checks; this is not a tool-execution or security guarantee.

Successful checks: 1 of 1 (100%)
Average latency: 1181 ms
95th percentile latency: 1181 ms

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

Nov 7, 2026, 6:24 PM UTC · probe · passed · 1181 ms · metadata changed · 1 tool(s), 1 resource(s), 0 resource template(s)

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers the remote server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http prince-of-post-mcp https://princeofpost.com/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add prince-of-post-mcp --url https://princeofpost.com/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable prince-of-post-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "prince-of-post-mcp": {
      "url": "https://princeofpost.com/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).

Cline configuration

{
  "mcpServers": {
    "prince-of-post-mcp": {
      "type": "streamableHttp",
      "url": "https://princeofpost.com/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start prince-of-post-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "prince-of-post-mcp": {
      "type": "http",
      "url": "https://princeofpost.com/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http prince-of-post-mcp https://princeofpost.com/mcp

Claude Desktop

Open Claude Settings > Connectors > Add custom connector, enter this server URL and enable it for the conversation. This is a manual remote-connector handoff, not a desktop JSON configuration.

Claude Desktop configuration

https://princeofpost.com/mcp

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "prince-of-post-mcp": {
      "serverUrl": "https://princeofpost.com/mcp"
    }
  }
}

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