A2A conformance
Measured conformance observations for the public A2A corpus.
Reachable278
Silent53
Signed21
Operators264
First measured: Sep 7, 2026 · Measured: Oct 21, 2026
Conformance grade
- fail
- 126
- pass
- 83
- warn
- 69
Card shape
- legacy
- 145
- v1
- 133
Protocol versions
- 1.0
- 85
- 0.3.0
- 45
- 0.3
- 31
- 1.0.0
- 5
- 2025-06-18
- 4
- 0.2
- 2
- 0.2.5
- 2
- 0.1
- 1
- 0.2.0
- 1
- 0.2.9
- 1
- 0.5.0
- 1
- 1.0.1
- 1
- 2025-11-25
- 1
- v1.0
- 1
Observed findings
- legacy-shape
- 145
- moved-field
- 145
- missing-field
- 125
- not-a-media-type
- 23
- empty-field
- 7
- insecure-interface-url
- 5
- no-skills
- 4
- wrong-type
- 2
- invalid-url
- 1
Missing fields
- protocolVersion
- 79
- defaultInputModes
- 58
- defaultOutputModes
- 58
- skills[].tags
- 44
- capabilities
- 37
- skills
- 30
- version
- 26
- supportedInterfaces
- 16
- supportedInterfaces[].protocolVersion
- 16
- provider.organization
- 12
- supportedInterfaces[].protocolBinding
- 11
- provider.url
- 10