Proposal: Go SDK for UCP

[dhananjay2021]

Summary

I've developed a Go SDK for the Universal Commerce Protocol and would like to contribute it to the project. The SDK follows the patterns established by the existing Python and JavaScript SDKs.

Repository: https://github.com/dhananjay2021/ucp-go-sdk

What's Included

Packages

Package	Description
models/	Go structs for all UCP schemas (checkout, payment, fulfillment, order, discount, buyer consent)
client/	REST client for platforms/agents to consume UCP APIs
server/	HTTP handlers and middleware for merchants to implement UCP endpoints
validation/	JSON Schema validation and capability negotiation
extensions/	Extended types combining base schemas with UCP extensions
examples/	Working examples for both business server and platform client

Features

• No external dependencies - Uses only Go standard library
• Idiomatic Go - Follows Go conventions and best practices
• Comprehensive types - All UCP schemas represented as Go structs
• Full documentation - README with usage examples and GoDoc comments
• Apache 2.0 license - Matching other UCP repositories

Example Usage

Platform Client:

client := client.NewClient("https://merchant.example.com")
profile, _ := client.FetchProfile(ctx)
checkout, _ := client.CreateCheckout(ctx, &extensions.ExtendedCheckoutCreateRequest{
    LineItems: []models.LineItemCreateRequest{{...}},
    Currency: "USD",
})

Business Server:

srv := server.NewServer(config)
srv.HandleCreateCheckout(myHandler)
http.ListenAndServe(":8080", srv)

Questions for Maintainers

1. Would you like this contributed as a new repository under the UCP organization (similar to python-sdk and js-sdk)?
2. Are there any specific requirements or changes needed before accepting?
3. Should I open an Enhancement Proposal, or is a direct contribution appropriate for SDKs?

About Me

I'm a Staff Software Engineer and Tech Lead on Thumbtack's Partnership team, where I led the OpenAI MCP partnership and the team that built Thumbtack's MCP app for OpenAI.

Given my experience with agentic protocols and AI-commerce integrations, I'm excited about UCP's potential to standardize the commerce layer for AI agents. I'd love to contribute to the ecosystem by bringing Go SDK support, following the patterns established by the existing Python and JavaScript SDKs.

I'm happy to make any adjustments based on maintainer feedback.

LinkedIn: https://www.linkedin.com/in/dhananjay-sathe-48029b54/

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Technical Details:

• Go 1.22+
• 28 source files
• Builds with go build ./... ✓
• Passes go vet ./... ✓