MCP HeartbeatTHE MCP OBSERVATORY
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Evidence for your next connection.

Independent measurements of remote MCP servers. Every observation has a timestamp.

Read-only probes

Publisher portfolio

ppn-hub.com

Explore the MCP servers published by ppn-hub.com, with independent connection checks, performance measurements, and setup instructions for each project.

Listed servers
1

Active projects in this portfolio. Deleted and deprecated registry rows are excluded.

Sampled servers
1

Active servers with a recorded connection probe

Latest probe connected
1

Latest stored probe connected. This is not a live guarantee.

Repositories
0

Distinct source repositories linked by the active listings

Portfolio overview

MCP servers

Compare connection status and measurements. Open a server for its tools, check results, and client configuration.

Dated server measurements. The status describes the last probe or a listed authentication requirement. Checks that have not been measured are not failures. Open a server to inspect the evidence.
Server / capabilityLast probeMedian latencyChecks passedLast checked
PPN Hub — public APIs over MCP

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

Developer ToolsData access / search

Responded113 ms12 / 22

Company & identity

About ppn-hub.com

ppn-hub.com publishes MCP servers under the com.ppn-hub namespace. This namespace uses a reverse-domain identity in the directory.

Namespace verification connects the publisher to its registry identity. It does not certify the security of individual servers.

Source repositories

No source repositories listed yet.