Robin Saige we check the tools AI agents call

State of MCP

The weekly census bulletin: what changed in the MCP world between two censuses — growth, deaths, drift, verdict flips, and what could be checked as true. Every number is derived from the database when the report is drafted; a person rules it before it appears here.

The registry claims 30,455 servers; 8,756 actually answer

+4,671 listings vs +733 answering since the previous census — the gap widened

10k20k30kcensus of 2026-08-14 — 5,947 servers answeringcensus of 2026-08-16 — 6,308 servers answeringcensus of 2026-08-23 — 7,586 servers answeringcensus of 2026-08-30 — 8,023 servers answeringcensus of 2026-09-06 — 8,756 servers answering30,455 listed ○8,756 answer ●34 verified true08-1409-06

Why it moved — between the two censuses

new and answeringnew and answering: +1,340+1,340came backcame back: +76+76stopped answeringstopped answering: -125-125reclassified / leftreclassified / left: -558-558net +733 answering — the move the line above just made

Beneath the surface

1,951 tools re-described or changed

67% of it by one publisher (io.github.pipeworx-io) — one deploy, many costumes

276 verdicts flipped

allow, warn or block changed for these servers — repin before you depend on one

369 of 376 decided truth checks agreed

7 in review — a disagreement is never published before a person confirms it; 900 unverifiable from outside

listed = the registry’s own enumeration, daily ○ · answer = measured at each weekly census ● (dots) · verified true = servers whose latest answers matched the primary source ● · recording began 2026-08-13 · re-derive: the series · as of 2026-09-10

State of MCP — census of 2026-08-23

24,349 servers listed (+2,356 in a week). 7,586 answer. 2,355 arrived — top 3 publishers account for 52%. 125 died, 76 revived, 276 verdict flips. truth checks: 369 of 376 decided agreed.