Semantic Kernel
./ConnectMicrosoft SDK for building AI agents and plugins
$ protocol support
[✗]MCP Server
[✗]OpenAPI Spec
[✗]Accepts MPP
[✗]Accepts x402
[✗]Supports ACP
[✗]Supports UCP
[✗]Skill File
[✗]Plugin Manifest
[✗]llms.txt
[✗]Structured Feed
[✗]Agent Protocol
$ agent access
authNo Auth
onboardingFull — agent can self-onboard
tosExplicitly welcomes bots
webhooksNo
free tierYes
billingfree
#agents#microsoft#sdk#plugins
https://learn.microsoft.com/semantic-kernel