PPN Hub — public APIs over MCP

connects

mcp.ppn-hub.com

One MCP endpoint over 69 public PPN APIs: search_apis to discover, execute_api to call. Free tier.

https://mcp.ppn-hub.com/mcpWebsiteOAuthMCP 2025-11-25v1.2.0last checked 24 Aug 2026spoke MCP on 3 of 3 checks (30 days)initialize in 661 ms

How to authenticate

Checked against the endpoint by our probe on 24 Aug 2026. These are the capabilities the server advertises, not a prediction about any particular client.

Scheme	OAuth
Issuer	https://ppn-hub.com
Dynamic client registration	✓Advertised (RFC 7591)
Client ID Metadata Document	✕Not advertised
PKCE	✓S256
Grant types	authorization_code, refresh_token
Scopes	openid, profile, email
Protected-resource metadata	✓Published (RFC 9728)
Anonymous access	Handshake succeeds; 3 tools listable
Documentation	https://github.com/dkurokawa/ppn-mono/blob/main/docs/MCP-CLIENT-SETUP.md

What the probe found

3 tools usable without signing in

The server exposes a public surface before authorization: search_apis, execute_api, environment_brief.

Tools

environment_briefexecute_apisearch_apis

Contract history

24 Aug 2026v1.2.0first recorded contract

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Status badge

Status for a README, from the last probe — cached an hour, so up to seven hours behind the endpoint. Links back to this page.

[![MCP status](https://mcpi.app/servers/ppn-hub-public-apis-over-mcp/badge.svg)](https://mcpi.app/servers/ppn-hub-public-apis-over-mcp)