Google Agent Development Kit
./ConnectOpen-source framework for building and deploying agents, with A2A interop and Vertex AI Agent Engine
OpenAPI
$ protocol support
[✗]MCP Server
[✓]OpenAPI Spec
[✗]Skill File
[✗]llms.txt
[✗]Structured Feed
$ payment protocols
none documented — this service is not reachable over an agent payment protocol
$ agent access
authAPI Key
onboardingFull — agent can self-onboard
tosExplicitly welcomes bots
webhooksNo
free tierYes
billingfree
#agents#framework#a2a#google#open-source
https://google.github.io/adk-docs/
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