State of MCP Server Health
Every figure below is measured directly from the 19,694 servers in the official MCP registry, probed, hashed, and tracked by ToolPin. Generated 2026-08-02 21:07 UTC, refreshed hourly.
Catalog last crawled 2026-08-02 04:19 UTC · servers last probed 2026-08-02 05:58 UTC.
The catalog
Reachability
Of 10,282 remote endpoints probed:
| Status | Endpoints |
|---|---|
| reachable | 5,353 |
| auth required | 2,588 |
| protocol error | 1,565 |
| unreachable | 592 |
The 2026-07-28 migration
98.6% of the 5,555 servers that report a protocol version are still on an older spec revision. Only 77 have moved to 2026-07-28.
| Protocol version | Servers | Share |
|---|---|---|
| 2025-11-25 | 2,778 | 50.0% |
| 2025-03-26 | 1,590 | 28.6% |
| 2025-06-18 | 649 | 11.7% |
| 2024-11-05 | 461 | 8.3% |
| 2026-07-28 current | 77 | 1.4% |
The 2026-07-28 revision, now final, removes the initialize handshake and Mcp-Session-Id; servers on earlier revisions need changes. Check a specific server →
Maintenance & decay
Integrity tracking
Largest tool surfaces
Servers exposing the most tools, a proxy for attack surface and context cost.
Most recent tool-definition changes
| Server | When (UTC) |
|---|---|
| io.github.pipeworx-io/ct-dmv | 2026-08-02 05:58 |
| store.scvd/general-store | 2026-08-02 05:58 |
| io.github.pipeworx-io/ny-dmv | 2026-08-02 05:58 |
| io.github.pipeworx-io/nj-mvc | 2026-08-02 05:58 |
| io.github.pipeworx-io/ca-grants | 2026-08-02 05:58 |
| io.github.pipeworx-io/ca-dmv | 2026-08-02 05:58 |
| io.github.pipeworx-io/wa-dmv | 2026-08-02 05:58 |
| io.github.pipeworx-io/ukri-gtr | 2026-08-02 05:58 |
| io.github.pipeworx-io/tx-dmv | 2026-08-02 05:58 |
| io.github.pipeworx-io/tn-dmv | 2026-08-02 05:58 |
Methodology: all figures are observed facts from read-only probes and public metadata. See how we monitor. Reproducible: this page regenerates from live data on every load.