State of MCP Server Health
Every figure below is measured directly from the 33,867 servers in the official MCP registry, probed, hashed, and tracked by Toolpin. Generated 2026-09-20 06:28 UTC, refreshed hourly.
Catalog last crawled 2026-09-20 04:21 UTC · servers last probed 2026-09-20 06:28 UTC.
The catalog
Reachability
Of 21,702 remote endpoints probed:
| Status | Endpoints |
|---|---|
| reachable | 11,509 |
| auth required | 4,774 |
| protocol error | 3,756 |
| unreachable | 1,382 |
The 2026-07-28 migration
91.1% of the 13,845 servers that report a protocol version are still on an older spec revision. Only 1,230 have moved to 2026-07-28.
| Protocol version | Servers | Share |
|---|---|---|
| 2025-11-25 | 6,106 | 44.1% |
| 2025-03-26 | 4,351 | 31.4% |
| 2025-06-18 | 1,575 | 11.4% |
| 2026-07-28 current | 1,230 | 8.9% |
| 2024-11-05 | 583 | 4.2% |
The 2026-07-28 revision 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) |
|---|---|
| ai.analyticslegends/sap-analytics | 2026-09-20 06:28 |
| io.github.keysersoft/anythingmcp | 2026-09-20 06:28 |
| io.github.giuseppesocci-bot/kalicart-global | 2026-09-20 06:28 |
| io.github.eamwhite1/xrpl-referee | 2026-09-20 06:27 |
| io.apis/apis-io | 2026-09-20 06:27 |
| io.github.cyanheads/openfec-mcp-server | 2026-09-20 06:27 |
| io.github.cyanheads/pokeapi-mcp-server | 2026-09-20 06:27 |
| io.github.MikeyPetrillo/agent402 | 2026-09-20 06:27 |
| io.github.conquext/neuron | 2026-09-20 06:27 |
| io.github.cyanheads/fema-mcp-server | 2026-09-20 06:27 |
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.