Weekly brief
Week ending 1 Nov 2026
18 entries observed; 0 changed, 0 with a breaking change.
Summary of the figures
AI-written summary · beta
The directory listed 277 entries, all 277 with a detected protocol, and 109 entries had a reachable MCP endpoint. Of the 18 entries observed this week, 17 were new and 1 was unchanged; 0 entries changed and 0 entries had breaking changes. Over the past 90 days, PROTOCOL_VERSION_CHANGED appeared in 2 entries, and the breaking change ACCESS_NOW_REQUIRES_AUTH appeared in 1 entry.
Written by claude-sonnet-5.5 from the figures below only, and checked number by number against them before publication.
Figures
- Entries listed
- 277
- Entries with a detected protocol
- 277
- Entries observed this week
- 18
- New entries this week
- 17
- Entries changed this week
- 0
- Entries with breaking changes this week
- 0
- Entries unchanged this week
- 1
- Entries with a reachable MCP endpoint
- 109
Most frequent changes
last 90 days
INVENTORY_COMPARISON_INDETERMINATEIndeterminate2 compared pairs · 2 entries
PROTOCOL_VERSION_CHANGEDIndeterminate2 compared pairs · 2 entries
ACCESS_METADATA_CHANGEDIndeterminate1 compared pair · 1 entry
ACCESS_NOW_REQUIRES_AUTHBreaking1 compared pair · 1 entry
CAPABILITY_METADATA_CHANGEDInformational1 compared pair · 1 entry
The atlas records passive observations of public interfaces listed in the Official MCP Registry. It assigns no scores or rankings.