State of A2A — October 2026
On October 31, 2026, KoPass reached 290 A2A agents, compared with 263 on October 1, 2026. 57.2% of agents declaring a version reported A2A 1.0 (+0.8 points over the month).
Measurement coverage
- First measured day
- October 1, 2026
- Last measured day
- October 31, 2026
- Measured days
- 31
- Published on
- November 1, 2026
Start, end and change
- Reachable
- 263 → 290 (+27)
- Declaring a readable version
- 149 → 173 (+24)
- Silent
- 34 → 54 (+20)
Measured shares
- A2A 1.0 among version-declaring agents
- 56.4% → 57.2% (+0.8 points)
- v1 card shape among reachable agents
- 44.9% → 50.0% (+5.1 points)
Version families on the last measured day
- 1.0
- 99
- 0.3
- 77
- 0.2
- 6
- 0.1
- 2
- 0.5
- 1
- 1.1
- 1
Conformance grades on the last measured day
- fail
- 127
- pass
- 94
- warn
- 69
Method
KoPass reads each public agent card daily from the agent’s own well-known location. This report uses only readings dated within the stated month.
Version-family shares use agents declaring a readable version as their denominator. Card-shape shares use reachable agents. Raw counts are not used as adoption shares.
Agents that do not answer are counted as silent, not reachable. Agents without a readable version are absent from version families. Repository counts are not part of this report.
Shares and their change are rounded to 0.1 percentage point using ROUND_HALF_UP. A zero denominator remains unavailable, never 0%.