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Paper Plane Post MCP server

Which MCP servers are Paper Plane Post's own, from the official registry and from asking its own domain, whether they answer, and what they offer. A program checked each of these, nobody copied them from a product page.

read 2026-10-27

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Whose server it is
  • Registry namecom.paperplanepost/officeverified in the MCP registry

The registry name sits under paperplanepost.com. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

When we asked itchecked 2026-10-27
  • Stateanswerschecked 2026-10-27
  • Tools2
  • Server calls itselfpaper-plane-post
  • Server version1.0.0
  • Protocol version2025-06-18

On 2026-10-27 the server answered initialize and tools/list without a sign-in. First answer in 345 ms.

Should an agent connect itNot proven either way yet
  • Whether its tools do the product's job has not been judged yet.

Once connected

  • For "mail a printed photo postcard to someone", the likely first call is start_postcard.
  • Parameters are untyped or undescribed in 1 of 2 tools: check arguments before calling.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

Measured dailydaily checks: 7, the first on 2026-10-27
  • INITE MCP score98 of 100answers 100 · definitions 92 · context 100 · connects 100
  • Answered100% of days7 of 7 daily checks
  • Median first answer349 ms
  • Space in an agent's context≈ 1,296 tokensthe definitions of all its tools (2), which an agent carries on every turn
  • Tool definitionsA · 92 of 100
  • Typed results2 of 2 toolsdeclared outputSchema: results come typed, read once
  • Parameters without a description: in 1 of 2

What an agent can do with it

  • can do · mail a printed photo postcard to someone
  • not sure · add a short note and a recipient address
  • not sure · turn a photo into an illustrated postcard

Each of the product's use cases, put to Jev against this server's tool list: can an agent do it with these tools?

Worth a look

None of the five warning signs in these definitions.

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (25%), doing the product's job (25%), definitions (20%), context (10%), use (10%) and how readily a client connects (10%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

Tools it offers2 tools · read 2026-10-27
  • start_postcard

    Start a Paper Plane Post postcard: a photo printed on a 4×6 card, with an optional illustrated version of it, mailed first class for $7 with postage included. Mails from the US to 194 countries; the address country is an ISO 3166-1…

  • show_postcard

    Display the Finish your postcard button for an existing unpaid draft URL returned by start_postcard, including after the Claude skill's file-transfer helper. Does not create a draft, read its contents, charge, or mail anything. Only use…

How to connect

Add the server to your MCP client config. Claude Desktop, Cursor and most other clients read this shape:

{
  "mcpServers": {
    "office": {
      "type": "http",
      "url": "https://api.paperplanepost.com/v1/mcp"
    }
  }
}

Add it

Claude Code, in a terminal

claude mcp add --transport http paperplanepost https://api.paperplanepost.com/v1/mcp

Add to CursorAdd to VS Code

claude.ai, ChatGPT and other clients: add https://api.paperplanepost.com/v1/mcp as a custom connector in the settings.

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.