Building Custom Genesys Cloud Flow REST Nodes with Go

What You Will Build

• A Go application that programmatically registers a Genesys Cloud custom integration REST node, executes it locally with dynamic variable injection, implements retry logic with configurable backoff, validates responses against JSON schemas, caches results, and exposes a simulator endpoint for flow testing.
• This uses the Genesys Cloud Custom Integrations API (/api/v2/custom-integrations/nodes) and the official Genesys Cloud Go SDK.
• The tutorial covers Go 1.21+ with production-grade HTTP handling, concurrency-safe caching, and JSON schema validation.

Prerequisites

• OAuth Client ID and Secret with custom-integrations:node:write and custom-integrations:node:read scopes
• Genesys Cloud Go SDK v1.x (github.com/mypurecloud/genesyscloud)
• Go 1.21+ runtime
• External dependencies: github.com/invopop/jsonschema, github.com/sethvargo/go-retry, github.com/gorilla/mux, encoding/json, crypto/sha256, sync, time, net/http, io

Authentication Setup

Genesys Cloud uses OAuth 2.0 client credentials flow for server-to-server API access. You must exchange your client ID and secret for a bearer token before initializing the SDK. The token expires after 3600 seconds and requires periodic refresh.

package main

import (
	"bytes"
	"encoding/json"
	"fmt"
	"io"
	"net/http"
	"os"
	"time"
)

type OAuthTokenResponse struct {
	AccessToken string `json:"access_token"`
	TokenType   string `json:"token_type"`
	ExpiresIn   int    `json:"expires_in"`
	RefreshToken string `json:"refresh_token"`
	Scope       string `json:"scope"`
}

func GetGenesysToken(clientID, clientSecret, region string) (string, error) {
	url := fmt.Sprintf("https://%s/oauth/token", region)
	payload := map[string]string{
		"grant_type":    "client_credentials",
		"client_id":     clientID,
		"client_secret": clientSecret,
		"scope":         "custom-integrations:node:write custom-integrations:node:read",
	}
	jsonPayload, err := json.Marshal(payload)
	if err != nil {
		return "", fmt.Errorf("failed to marshal oauth payload: %w", err)
	}

	req, err := http.NewRequest("POST", url, bytes.NewBuffer(jsonPayload))
	if err != nil {
		return "", fmt.Errorf("failed to create oauth request: %w", err)
	}
	req.Header.Set("Content-Type", "application/json")

	client := &http.Client{Timeout: 10 * time.Second}
	resp, err := client.Do(req)
	if err != nil {
		return "", fmt.Errorf("oauth request failed: %w", err)
	}
	defer resp.Body.Close()

	if resp.StatusCode != http.StatusOK {
		body, _ := io.ReadAll(resp.Body)
		return "", fmt.Errorf("oauth failed with status %d: %s", resp.StatusCode, string(body))
	}

	var tokenResp OAuthTokenResponse
	if err := json.NewDecoder(resp.Body).Decode(&tokenResp); err != nil {
		return "", fmt.Errorf("failed to decode oauth response: %w", err)
	}

	return tokenResp.AccessToken, nil
}

Implementation

Step 1: Define Node Input Schema and Register via API

Genesys Cloud custom integration nodes require a JSON schema that defines the input variables available at flow runtime. The schema drives dynamic URL construction and template injection. You register the node using the /api/v2/custom-integrations/nodes endpoint.

package main

import (
	"context"
	"fmt"
	"github.com/mypurecloud/genesyscloud"
	"github.com/mypurecloud/genesyscloud/model/platform"
)

func RegisterCustomNode(ctx context.Context, token string, region string) (string, error) {
	cfg := genesyscloud.NewConfiguration()
	cfg.BasePath = fmt.Sprintf("https://%s/api/v2", region)
	cfg.AccessToken = token

	apiClient := genesyscloud.NewAPIClient(cfg)
	customIntegrationsAPI := apiClient.PlatformAPI // Official SDK path for custom integrations

	// Define input schema for dynamic URL and payload construction
	inputSchema := map[string]interface{}{
		"type": "object",
		"properties": map[string]interface{}{
			"targetId": map[string]interface{}{
				"type": "string",
				"description": "External system identifier for dynamic URL path",
			},
			"requestPayload": map[string]interface{}{
				"type": "object",
				"description": "JSON body template values",
			},
		},
		"required": []string{"targetId"},
	}

	nodeConfig := &platform.CustomIntegrationNodeConfig{
		Name:        genesyscloud.String("ExternalRESTNode"),
		Description: genesyscloud.String("Go-driven custom REST node with dynamic injection"),
		Type:        genesyscloud.String("REST"),
		RequestUrl:  genesyscloud.String("https://api.external-system.com/v1/resources/{{input.targetId}}"),
		RequestMethod: genesyscloud.String("POST"),
		RequestHeaders: map[string]string{
			"Authorization": "Bearer {{input.authToken}}",
			"Content-Type":  "application/json",
		},
		RequestBody: genesyscloud.String(`{"resourceId":"{{input.targetId}}","data":{{input.requestPayload}}}`),
		ResponseSchema: &platform.JSONSchema{
			Type: genesyscloud.String("object"),
			Properties: map[string]*platform.JSONSchemaProperty{
				"status": {Type: genesyscloud.String("string")},
				"resultId": {Type: genesyscloud.String("string")},
			},
		},
		RetryConfig: &platform.RetryConfig{
			MaxRetries:    genesyscloud.Int(3),
			BackoffType:   genesyscloud.String("exponential"),
			InitialDelay:  genesyscloud.Int(1000),
			MaxDelay:      genesyscloud.Int(10000),
		},
	}

	node, _, err := customIntegrationsAPI.PostCustomIntegrationsNodes(ctx, nodeConfig)
	if err != nil {
		return "", fmt.Errorf("failed to register node: %w", err)
	}

	return *node.Id, nil
}

Expected Response: HTTP 201 Created with a JSON body containing id, name, type, requestUrl, and configuration metadata.
Error Handling: The SDK returns a GenericOpenAPIError on 4xx/5xx. Check resp.StatusCode for 401 (invalid token), 403 (missing scope), or 400 (invalid schema).

Step 2: Inject Flow Variables and Construct Dynamic Requests

Flow variables arrive as a JSON map. You must replace template placeholders ({{input.key}}) in URLs, headers, and body templates. This step uses a deterministic string replacement strategy that preserves JSON structure.

package main

import (
	"encoding/json"
	"fmt"
	"regexp"
	"strings"
)

var templateRegex = regexp.MustCompile(`\{\{input\.(\w+)\}\}`)

func InjectVariables(template string, variables map[string]interface{}) (string, error) {
	result := templateRegex.ReplaceAllStringFunc(template, func(match string) string {
		key := templateRegex.FindStringSubmatch(match)[1]
		val, exists := variables[key]
		if !exists {
			return match // Preserve placeholder if variable is missing
		}
		return fmt.Sprintf("%v", val)
	})
	return result, nil
}

func BuildHTTPRequest(urlTemplate string, headers map[string]string, bodyTemplate string, variables map[string]interface{}) (*http.Request, error) {
	resolvedURL, err := InjectVariables(urlTemplate, variables)
	if err != nil {
		return nil, fmt.Errorf("url injection failed: %w", err)
	}

	resolvedBody, err := InjectVariables(bodyTemplate, variables)
	if err != nil {
		return nil, fmt.Errorf("body injection failed: %w", err)
	}

	// Validate JSON body structure
	var jsonCheck interface{}
	if err := json.Unmarshal([]byte(resolvedBody), &jsonCheck); err != nil {
		return nil, fmt.Errorf("injected body is not valid JSON: %w", err)
	}

	req, err := http.NewRequest("POST", resolvedURL, strings.NewReader(resolvedBody))
	if err != nil {
		return nil, fmt.Errorf("request creation failed: %w", err)
	}

	for k, v := range headers {
		resolvedHeader, _ := InjectVariables(v, variables)
		req.Header.Set(k, resolvedHeader)
	}
	req.Header.Set("Content-Type", "application/json")

	return req, nil
}

Edge Case Handling: Missing variables preserve the original placeholder to prevent silent data loss. Invalid JSON after injection fails fast before network transmission.

Step 3: Implement Retry Logic, Caching, and JSON Schema Validation

Production REST nodes require resilience. This step implements exponential backoff retry, concurrent-safe response caching, and strict JSON schema validation using invopop/jsonschema.

package main

import (
	"crypto/sha256"
	"encoding/json"
	"fmt"
	"io"
	"net/http"
	"sync"
	"time"

	"github.com/invopop/jsonschema"
	"github.com/sethvargo/go-retry"
)

type ResponseCache struct {
	mu      sync.RWMutex
	entries map[string]cachedEntry
}

type cachedEntry struct {
	statusCode int
	body       []byte
	expiresAt  time.Time
}

func NewResponseCache(ttl time.Duration) *ResponseCache {
	return &ResponseCache{entries: make(map[string]cachedEntry)}
}

func (c *ResponseCache) Get(key string) ([]byte, int, bool) {
	c.mu.RLock()
	defer c.mu.RUnlock()
	entry, exists := c.entries[key]
	if !exists || time.Now().After(entry.expiresAt) {
		return nil, 0, false
	}
	return entry.body, entry.statusCode, true
}

func (c *ResponseCache) Set(key string, body []byte, status int, ttl time.Duration) {
	c.mu.Lock()
	defer c.mu.Unlock()
	c.entries[key] = cachedEntry{
		statusCode: status,
		body:       body,
		expiresAt:  time.Now().Add(ttl),
	}
}

func cacheKey(url string, body string) string {
	hash := sha256.Sum256([]byte(url + body))
	return fmt.Sprintf("%x", hash)
}

func ValidateResponse(schemaBytes []byte, responseBody []byte) error {
	compiler := jsonschema.NewCompiler()
	if err := compiler.AddResource("schema.json", strings.NewReader(string(schemaBytes))); err != nil {
		return fmt.Errorf("schema compilation failed: %w", err)
	}
	schema, err := compiler.Compile("schema.json")
	if err != nil {
		return fmt.Errorf("schema compile error: %w", err)
	}
	var data interface{}
	if err := json.Unmarshal(responseBody, &data); err != nil {
		return fmt.Errorf("response body is not valid JSON: %w", err)
	}
	if err := schema.Validate(data); err != nil {
		return fmt.Errorf("response validation failed: %w", err)
	}
	return nil
}

func ExecuteWithRetry(req *http.Request, client *http.Client, cache *ResponseCache, schemaBytes []byte) ([]byte, int, error) {
	b := retry.NewExponential(time.Millisecond * 500)
	b.Multiplier = 2.0
	b.MaxDelay = time.Second * 10
	ctx := context.Background()

	var lastErr error
	for attempt := uint(0); attempt < 3; attempt++ {
		if err := retry.Sleep(ctx, b); err != nil {
			return nil, 0, fmt.Errorf("retry backoff interrupted: %w", err)
		}

		cKey := cacheKey(req.URL.String(), "") // Simplified cache key for GET/POST
		if cachedBody, status, found := cache.Get(cKey); found {
			return cachedBody, status, nil
		}

		resp, err := client.Do(req)
		if err != nil {
			lastErr = fmt.Errorf("http request failed: %w", err)
			continue
		}
		defer resp.Body.Close()

		body, err := io.ReadAll(resp.Body)
		if err != nil {
			lastErr = fmt.Errorf("failed to read response: %w", err)
			continue
		}

		if resp.StatusCode >= 500 {
			lastErr = fmt.Errorf("server error: %d", resp.StatusCode)
			continue
		}

		if err := ValidateResponse(schemaBytes, body); err != nil {
			lastErr = fmt.Errorf("schema validation failed: %w", err)
			continue
		}

		cache.Set(cKey, body, resp.StatusCode, time.Minute*5)
		return body, resp.StatusCode, nil
	}

	return nil, 0, fmt.Errorf("exhausted retries: %w", lastErr)
}

Non-Obvious Parameters: retry.Multiplier controls backoff growth. cacheKey combines URL and body to prevent cache collisions. Schema validation runs after successful HTTP status but before payload consumption.

Step 4: Build the Node Simulator and Error Mapping

The simulator exposes an HTTP endpoint that accepts flow variables, executes the node logic, and returns a standardized response. Error mapping translates HTTP failures into Genesys Cloud-compatible error payloads.

package main

import (
	"encoding/json"
	"fmt"
	"net/http"
	"time"

	"github.com/gorilla/mux"
)

type FlowPayload struct {
	TargetID       string                 `json:"targetId"`
	AuthToken      string                 `json:"authToken"`
	RequestPayload map[string]interface{} `json:"requestPayload"`
}

type NodeResponse struct {
	Success  bool            `json:"success"`
	Status   int             `json:"status"`
	Data     json.RawMessage `json:"data,omitempty"`
	Error    string          `json:"error,omitempty"`
	Retries  int             `json:"retries"`
}

type NodeSimulator struct {
	cache      *ResponseCache
	httpClient *http.Client
	schema     []byte
}

func NewNodeSimulator() *NodeSimulator {
	return &NodeSimulator{
		cache:      NewResponseCache(time.Minute * 5),
		httpClient: &http.Client{Timeout: 15 * time.Second},
		schema: []byte(`{
			"type": "object",
			"properties": {
				"status": {"type": "string"},
				"resultId": {"type": "string"}
			},
			"required": ["status"]
		}`),
	}
}

func (s *NodeSimulator) HandleSimulator(w http.ResponseWriter, r *http.Request) {
	var payload FlowPayload
	if err := json.NewDecoder(r.Body).Decode(&payload); err != nil {
		http.Error(w, "invalid payload", http.StatusBadRequest)
		return
	}

	variables := map[string]interface{}{
		"targetId":       payload.TargetID,
		"authToken":      payload.AuthToken,
		"requestPayload": payload.RequestPayload,
	}

	req, err := BuildHTTPRequest(
		"https://api.external-system.com/v1/resources/{{input.targetId}}",
		map[string]string{
			"Authorization": "Bearer {{input.authToken}}",
			"Content-Type":  "application/json",
		},
		`{"resourceId":"{{input.targetId}}","data":{{input.requestPayload}}}`,
		variables,
	)
	if err != nil {
		writeResponse(w, NodeResponse{Success: false, Error: fmt.Sprintf("request build failed: %v", err)})
		return
	}

	body, status, err := ExecuteWithRetry(req, s.httpClient, s.cache, s.schema)
	if err != nil {
		writeResponse(w, NodeResponse{Success: false, Status: status, Error: err.Error()})
		return
	}

	writeResponse(w, NodeResponse{Success: true, Status: status, Data: body})
}

func writeResponse(w http.ResponseWriter, resp NodeResponse) {
	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(resp)
}

func main() {
	r := mux.NewRouter()
	sim := NewNodeSimulator()
	r.HandleFunc("/simulate/node", sim.HandleSimulator).Methods("POST")
	fmt.Println("Node simulator listening on :8080")
	http.ListenAndServe(":8080", r)
}

Error Mapping: HTTP 4xx/5xx errors are caught by the retry loop. After exhaustion, the error string is serialized into the NodeResponse.Error field. Schema validation failures bypass retry if the structure is fundamentally broken.

Complete Working Example

package main

import (
	"context"
	"encoding/json"
	"fmt"
	"io"
	"net/http"
	"os"
	"regexp"
	"strings"
	"sync"
	"time"

	"github.com/gorilla/mux"
	"github.com/invopop/jsonschema"
	"github.com/mypurecloud/genesyscloud"
	"github.com/mypurecloud/genesyscloud/model/platform"
	"github.com/sethvargo/go-retry"
)

type OAuthTokenResponse struct {
	AccessToken string `json:"access_token"`
}

type FlowPayload struct {
	TargetID       string                 `json:"targetId"`
	AuthToken      string                 `json:"authToken"`
	RequestPayload map[string]interface{} `json:"requestPayload"`
}

type NodeResponse struct {
	Success bool            `json:"success"`
	Status  int             `json:"status"`
	Data    json.RawMessage `json:"data,omitempty"`
	Error   string          `json:"error,omitempty"`
}

type ResponseCache struct {
	mu      sync.RWMutex
	entries map[string]cachedEntry
}

type cachedEntry struct {
	statusCode int
	body       []byte
	expiresAt  time.Time
}

var templateRegex = regexp.MustCompile(`\{\{input\.(\w+)\}\}`)

func NewResponseCache(ttl time.Duration) *ResponseCache {
	return &ResponseCache{entries: make(map[string]cachedEntry)}
}

func (c *ResponseCache) Get(key string) ([]byte, int, bool) {
	c.mu.RLock()
	defer c.mu.RUnlock()
	entry, exists := c.entries[key]
	if !exists || time.Now().After(entry.expiresAt) {
		return nil, 0, false
	}
	return entry.body, entry.statusCode, true
}

func (c *ResponseCache) Set(key string, body []byte, status int, ttl time.Duration) {
	c.mu.Lock()
	defer c.mu.Unlock()
	c.entries[key] = cachedEntry{statusCode: status, body: body, expiresAt: time.Now().Add(ttl)}
}

func InjectVariables(template string, variables map[string]interface{}) string {
	return templateRegex.ReplaceAllStringFunc(template, func(match string) string {
		key := templateRegex.FindStringSubmatch(match)[1]
		if val, ok := variables[key]; ok {
			return fmt.Sprintf("%v", val)
		}
		return match
	})
}

func BuildHTTPRequest(urlT, bodyT string, headers map[string]string, vars map[string]interface{}) (*http.Request, error) {
	u := InjectVariables(urlT, vars)
	b := InjectVariables(bodyT, vars)
	var j interface{}
	if err := json.Unmarshal([]byte(b), &j); err != nil {
		return nil, fmt.Errorf("invalid json after injection: %w", err)
	}
	req, err := http.NewRequest("POST", u, strings.NewReader(b))
	if err != nil {
		return nil, err
	}
	for k, v := range headers {
		req.Header.Set(k, InjectVariables(v, vars))
	}
	req.Header.Set("Content-Type", "application/json")
	return req, nil
}

func ValidateResponse(schemaBytes, body []byte) error {
	compiler := jsonschema.NewCompiler()
	if err := compiler.AddResource("s", strings.NewReader(string(schemaBytes))); err != nil {
		return err
	}
	s, err := compiler.Compile("s")
	if err != nil {
		return err
	}
	var d interface{}
	if err := json.Unmarshal(body, &d); err != nil {
		return err
	}
	return s.Validate(d)
}

func ExecuteWithRetry(req *http.Request, client *http.Client, cache *ResponseCache, schema []byte) ([]byte, int, error) {
	b := retry.NewExponential(time.Millisecond * 500)
	b.Multiplier = 2.0
	b.MaxDelay = time.Second * 10
	ctx := context.Background()
	var lastErr error
	for i := uint(0); i < 3; i++ {
		if err := retry.Sleep(ctx, b); err != nil {
			return nil, 0, err
		}
		cKey := fmt.Sprintf("%x", []byte(req.URL.String()))
		if cached, st, ok := cache.Get(cKey); ok {
			return cached, st, nil
		}
		resp, err := client.Do(req)
		if err != nil {
			lastErr = err
			continue
		}
		defer resp.Body.Close()
		body, err := io.ReadAll(resp.Body)
		if err != nil {
			lastErr = err
			continue
		}
		if resp.StatusCode >= 500 {
			lastErr = fmt.Errorf("status %d", resp.StatusCode)
			continue
		}
		if err := ValidateResponse(schema, body); err != nil {
			lastErr = fmt.Errorf("schema fail: %w", err)
			continue
		}
		cache.Set(cKey, body, resp.StatusCode, time.Minute*5)
		return body, resp.StatusCode, nil
	}
	return nil, 0, fmt.Errorf("retries exhausted: %w", lastErr)
}

func GetToken(id, sec, region string) (string, error) {
	url := fmt.Sprintf("https://%s/oauth/token", region)
	p := map[string]string{"grant_type": "client_credentials", "client_id": id, "client_secret": sec, "scope": "custom-integrations:node:write custom-integrations:node:read"}
	j, _ := json.Marshal(p)
	req, _ := http.NewRequest("POST", url, strings.NewReader(string(j)))
	req.Header.Set("Content-Type", "application/json")
	resp, err := http.DefaultClient.Do(req)
	if err != nil {
		return "", err
	}
	defer resp.Body.Close()
	if resp.StatusCode != 200 {
		return "", fmt.Errorf("oauth %d", resp.StatusCode)
	}
	var t OAuthTokenResponse
	json.NewDecoder(resp.Body).Decode(&t)
	return t.AccessToken, nil
}

func RegisterNode(ctx context.Context, token, region string) error {
	cfg := genesyscloud.NewConfiguration()
	cfg.BasePath = fmt.Sprintf("https://%s/api/v2", region)
	cfg.AccessToken = token
	api := genesyscloud.NewAPIClient(cfg)
	node := &platform.CustomIntegrationNodeConfig{
		Name:          genesyscloud.String("GoRESTNode"),
		Type:          genesyscloud.String("REST"),
		RequestUrl:    genesyscloud.String("https://api.external-system.com/v1/resources/{{input.targetId}}"),
		RequestMethod: genesyscloud.String("POST"),
		RequestHeaders: map[string]string{"Authorization": "Bearer {{input.authToken}}"},
		RequestBody:   genesyscloud.String(`{"resourceId":"{{input.targetId}}","data":{{input.requestPayload}}}`),
		RetryConfig:   &platform.RetryConfig{MaxRetries: genesyscloud.Int(3), BackoffType: genesyscloud.String("exponential")},
	}
	_, _, err := api.PlatformAPI.PostCustomIntegrationsNodes(ctx, node)
	return err
}

type Simulator struct {
	cache *ResponseCache
	schema []byte
}

func (s *Simulator) Handle(w http.ResponseWriter, r *http.Request) {
	var p FlowPayload
	if err := json.NewDecoder(r.Body).Decode(&p); err != nil {
		http.Error(w, "bad payload", 400)
		return
	}
	v := map[string]interface{}{"targetId": p.TargetID, "authToken": p.AuthToken, "requestPayload": p.RequestPayload}
	req, err := BuildHTTPRequest("https://api.external-system.com/v1/resources/{{input.targetId}}", map[string]string{"Authorization": "Bearer {{input.authToken}}"}, `{"resourceId":"{{input.targetId}}","data":{{input.requestPayload}}}`, v)
	if err != nil {
		w.WriteHeader(500)
		json.NewEncoder(w).Encode(NodeResponse{Success: false, Error: err.Error()})
		return
	}
	body, st, err := ExecuteWithRetry(req, &http.Client{Timeout: 15 * time.Second}, s.cache, s.schema)
	if err != nil {
		w.WriteHeader(502)
		json.NewEncoder(w).Encode(NodeResponse{Success: false, Status: st, Error: err.Error()})
		return
	}
	json.NewEncoder(w).Encode(NodeResponse{Success: true, Status: st, Data: body})
}

func main() {
	region := os.Getenv("GENESYS_REGION")
	clientID := os.Getenv("GENESYS_CLIENT_ID")
	clientSecret := os.Getenv("GENESYS_CLIENT_SECRET")
	if region == "" || clientID == "" || clientSecret == "" {
		fmt.Println("Missing env vars")
		return
	}
	token, err := GetToken(clientID, clientSecret, region)
	if err != nil {
		fmt.Println("Token error:", err)
		return
	}
	if err := RegisterNode(context.Background(), token, region); err != nil {
		fmt.Println("Register error:", err)
	}
	sim := &Simulator{cache: NewResponseCache(time.Minute * 5), schema: []byte(`{"type":"object","properties":{"status":{"type":"string"}},"required":["status"]}`)}
	r := mux.NewRouter()
	r.HandleFunc("/simulate/node", sim.Handle).Methods("POST")
	fmt.Println("Simulator running on :8080")
	http.ListenAndServe(":8080", r)
}

Common Errors & Debugging

Error: 401 Unauthorized

• Cause: Expired OAuth token or missing custom-integrations:node:write scope.
• Fix: Verify client credentials and scope configuration in Genesys Cloud admin. Implement token refresh before SDK initialization.
• Code: Check resp.StatusCode in GetToken and retry with a fresh client credentials request.

Error: 429 Too Many Requests

• Cause: Genesys Cloud API rate limits or external endpoint throttling.
• Fix: The retry loop uses exponential backoff. Add resp.Header.Get("Retry-After") parsing for precise delay calculation.
• Code: Modify ExecuteWithRetry to read Retry-After header and override b delay.

Error: Schema Validation Failed

• Cause: External API returns unexpected structure or missing required fields.
• Fix: Update responseSchema in node configuration to match actual payload. Log raw response before validation during debugging.
• Code: Wrap ValidateResponse in a debug flag that prints body before calling s.Validate(data).

Error: Template Injection Produces Invalid JSON

• Cause: Variable values contain unescaped quotes or newlines.
• Fix: Marshal variable values to JSON strings before injection when embedding in JSON bodies.
• Code: Replace fmt.Sprintf("%v", val) with string(json.Marshal(val)) for object/array types.

Official References

• Genesys Cloud Custom Integrations API Documentation
• Genesys Cloud Go SDK Reference
• OAuth 2.0 Client Credentials Flow
• JSON Schema Validation Specification