Go SDK

https://github.com/cocoonmail/cocoonmail-go/

package main

import (
  "fmt"
  "log"
  "os"

  cocoonmail "github.com/cocoonmail/cocoonmail-go"
)

func main() {
  client := cocoonmail.NewClient(os.Getenv("COCOONMAIL_API_KEY"))

  resp, err := client.CreateContact("email@provider.com", nil, nil)
  if err != nil {
    log.Fatal(err)
  }

  fmt.Printf("Created contact: %+v\n", resp)
}

resp, err := client.TestApiKey()
if err != nil {
  log.Fatal(err)
}
fmt.Println(resp.TeamName)

{
  "success": true,
  "teamName": "My team"
}

props := map[string]interface{}{
  "firstName": "Bob",
  "favoriteColor": "Red",
}
mailingLists := map[string]bool{
  "cm06f5v0e45nf0ml5754o9cix": true,
}
resp, err := client.CreateContact("hello@gmail.com", props, mailingLists)
if err != nil {
  log.Fatal(err)
}
fmt.Println(resp.ID)

props := map[string]interface{}{
  "firstName": "Alice",
  "favoriteColor": "Blue",
}

resp, err := client.UpdateContact("hello@gmail.com", props, nil)
if err != nil {
  log.Fatal(err)
}
fmt.Println(resp.ID)

// Updating contact’s email with userId
props2 := map[string]interface{}{
  "userId": "1234",
}
resp, err = client.UpdateContact("newemail@gmail.com", props2, nil)

{
  "success": true,
  "id": "id_of_contact"
}

{
  "success": false,
  "message": "An error message here."
}

resp, err := client.FindContact(map[string]string{
  "email": "hello@gmail.com",
})
if err != nil {
  log.Fatal(err)
}
fmt.Printf("%+v\n", resp)

resp, err = client.FindContact(map[string]string{
  "userId": "12345",
})

[
  {
    "id": "cll6b3i8901a9jx0oyktl2m4u",
    "email": "hello@gmail.com",
    "firstName": "Alice",
    "lastName": null,
    "source": "API",
    "subscribed": true,
    "userGroup": "",
    "userId": "12345",
    "mailingLists": {
      "cm06f5v0e45nf0ml5754o9cix": true
    },
    "favoriteColor": "Blue"
  }
]

// Delete by email
resp, err := client.DeleteContact(map[string]string{
  "email": "hello@gmail.com",
})
if err != nil {
  log.Fatal(err)
}
fmt.Println(resp.Message)

// Delete by userId
resp, err = client.DeleteContact(map[string]string{
  "userId": "12345",
})

{
  "success": true,
  "message": "Contact deleted successfully"
}

{
  "success": false,
  "message": "An error message here."
}

---

This keeps the **same structure** as your JavaScript docs but adapted for Go (with maps instead of objects, proper `err` handling, etc.).  

👉 Do you also want me to extend it for **sendEvent()** and **sendTransactionalEmail()** in Go, the way you have them in JS? That way your `go.mdx` will be a complete mirror of `javascript.mdx`.