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PPN Hub MCP server

Which servers in the official MCP registry are PPN Hub's own, whether they answer, and what they offer. A program checked each of these, nobody copied them from a product page.

read 2026-10-25

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Whose server it is
  • Registry namecom.ppn-hub/ppn-hubverified in the MCP registry

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

When we asked itchecked 2026-10-25
  • Stateanswerschecked 2026-10-25
  • Tools3
  • Server calls itselfppn-mcp-gateway
  • Server version1.2.0
  • Protocol version2025-06-18

On 2026-10-25 the server answered initialize and tools/list without a sign-in. First answer in 408 ms.

Should an agent connect itNot proven either way yet
  • Its tools do every use case we checked: Find a suitable API from the catalogue by search; Run API calls from inside Claude or Cursor.
  • Checked on 2 of the 7 days it takes to judge reliability.

Once connected

  • For "Find a suitable API from the catalogue by search", the likely first call is search_apis.
  • For "Run API calls from inside Claude or Cursor", the likely first call is search_apis.
  • Parameters are untyped or undescribed in 1 of 3 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: 2, the first on 2026-10-25
  • INITE MCP scoreafter a weeka score needs 7 daily checks: 2 so far
  • What an agent can do with it2 of 2 use cases
  • Answeredmeasuring2 of the 7 daily checks it takes to print a share
  • Median first answer464 ms
  • Space in an agent's context≈ 973 tokensthe definitions of all its tools (3), which an agent carries on every turn
  • Tool definitionsB · 78 of 100
  • Typed results0 of 3 toolsdeclared outputSchema: results come typed, read once
  • Parameters without a type: in 1 of 3
  • Not saying whether it only reads or can destroy: 3 of 3

What an agent can do with it

  • can do · Find a suitable API from the catalogue by search
  • can do · Run API calls from inside Claude or Cursor
  • not sure · Connect Claude Code to APIs over an MCP endpoint

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 (30%), doing the product's job (25%), definitions (20%), context (10%) and use (15%). 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 offers3 tools · read 2026-10-25
  • search_apis

    Search across 519 endpoints in 60 APIs (amenomi, cultural, earth, energy-calc, green-path, harmonias, hydrogen, internal, nanobase, nanosnap, natura, platform, sakurahub, science, sim, space, stocks). Returns matching endpoints with…

  • execute_api

    Execute a request against any of the 60 registered APIs. Use search_apis first to find the correct api name and operationId. Requires 'Authorization: Bearer ppn_live_*'.

  • environment_brief

    Environmental brief for one location: fans out to every public geo-aware API (weather, terrain, environment, …) and returns a merged JSON. Partial results come back with an errors[] list. Requires 'Authorization: Bearer ppn_live_*'.

How to connect

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

{
  "mcpServers": {
    "ppn-hub": {
      "type": "http",
      "url": "https://mcp.ppn-hub.com/mcp"
    }
  }
}

Add it

Claude Code, in a terminal

claude mcp add --transport http ppn-hub https://mcp.ppn-hub.com/mcp

Add to CursorAdd to VS Code

claude.ai, ChatGPT and other clients: add https://mcp.ppn-hub.com/mcp as a custom connector in the settings.

OpenAPI spec

102 paths, read 2026-10-25. Open the spec ↗

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.