Provisioning Genesys Cloud Users via SCIM API with Go

What You Will Build

• A Go service that constructs SCIM 2.0 payloads, validates attributes against schema constraints, checks license availability, and provisions users atomically.
• The implementation uses the Genesys Cloud SCIM v2 API (/api/v2/scim/v2/Users) and standard OAuth 2.0 client credentials flow.
• The tutorial covers Go 1.21+ with net/http, encoding/json, sync/atomic, and log/slog for production-ready provisioning logic.

Prerequisites

• OAuth 2.0 Client Credentials flow configured in Genesys Cloud with scim:users:write and scim:users:read scopes
• Genesys Cloud API version: v2 (SCIM 2.0 specification)
• Go runtime 1.21 or higher
• Standard library packages: net/http, encoding/json, context, time, sync/atomic, log/slog, fmt, errors, strings, regexp, os
• No third-party dependencies required

Authentication Setup

Genesys Cloud requires a bearer token for all SCIM operations. The following function implements the client credentials flow with token caching and automatic refresh when the token expires.

package main

import (
	"bytes"
	"context"
	"encoding/json"
	"fmt"
	"net/http"
	"sync"
	"time"
)

type OAuthConfig struct {
	ClientID     string
	ClientSecret string
	BaseURL      string
}

type TokenResponse struct {
	AccessToken string `json:"access_token"`
	ExpiresIn   int    `json:"expires_in"`
	TokenType   string `json:"token_type"`
}

type TokenManager struct {
	config        OAuthConfig
	token         string
	expiresAt     time.Time
	mu            sync.RWMutex
	httpClient    *http.Client
}

func NewTokenManager(cfg OAuthConfig) *TokenManager {
	return &TokenManager{
		config:     cfg,
		httpClient: &http.Client{Timeout: 10 * time.Second},
	}
}

func (tm *TokenManager) GetToken(ctx context.Context) (string, error) {
	tm.mu.RLock()
	if time.Now().Before(tm.expiresAt.Add(-30 * time.Second)) {
		token := tm.token
		tm.mu.RUnlock()
		return token, nil
	}
	tm.mu.RUnlock()

	tm.mu.Lock()
	defer tm.mu.Unlock()

	// Double-check after acquiring write lock
	if time.Now().Before(tm.expiresAt.Add(-30 * time.Second)) {
		return tm.token, nil
	}

	payload := fmt.Sprintf("grant_type=client_credentials&client_id=%s&client_secret=%s&scope=scim:users:write+scim:users:read",
		tm.config.ClientID, tm.config.ClientSecret)

	resp, err := tm.httpClient.Post(tm.config.BaseURL+"/oauth/token", "application/x-www-form-urlencoded", bytes.NewBufferString(payload))
	if err != nil {
		return "", fmt.Errorf("oauth token request failed: %w", err)
	}
	defer resp.Body.Close()

	if resp.StatusCode != http.StatusOK {
		return "", fmt.Errorf("oauth token request returned status %d", resp.StatusCode)
	}

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

	tm.token = tokenResp.AccessToken
	tm.expiresAt = time.Now().Add(time.Duration(tokenResp.ExpiresIn) * time.Second)

	return tm.token, nil
}

Implementation

Step 1: Payload Construction and Schema Validation

The SCIM 2.0 specification requires strict schema compliance. This step constructs the provisioning payload using a user-ref (external identifier), an attribute-matrix (key-value pairs for custom attributes), and a create directive (the POST operation). Email normalization and attribute count limits are enforced before serialization.

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

const (
	MaxAttributeCount = 50
	ScimUserSchema    = "urn:ietf:params:scim:schemas:core:2.0:User"
)

var emailRegex = regexp.MustCompile(`^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$`)

type AttributeMatrix map[string]string

type SCIMUserRequest struct {
	Schemas []string          `json:"schemas"`
	UserName string           `json:"userName"`
	Name    struct {
		GivenName  string `json:"givenName"`
		FamilyName string `json:"familyName"`
	} `json:"name"`
	Emails []struct {
		Value   string `json:"value"`
		Primary bool   `json:"primary"`
	} `json:"emails"`
	Active   bool              `json:"active"`
	ExternalID string         `json:"externalId,omitempty"`
	Attributes AttributeMatrix `json:"attributes,omitempty"`
	Roles    []struct {
		Value string `json:"value"`
	} `json:"roles,omitempty"`
}

func NormalizeEmail(raw string) (string, error) {
	cleaned := strings.TrimSpace(strings.ToLower(raw))
	if !emailRegex.MatchString(cleaned) {
		return "", errors.New("invalid email format after normalization")
	}
	return cleaned, nil
}

func ValidateAttributeMatrix(matrix AttributeMatrix, maxCount int) error {
	if len(matrix) > maxCount {
		return fmt.Errorf("attribute matrix contains %d attributes, maximum allowed is %d", len(matrix), maxCount)
	}
	for key, value := range matrix {
		if strings.TrimSpace(key) == "" {
			return errors.New("attribute keys cannot be empty")
		}
		if len(value) > 255 {
			return fmt.Errorf("attribute value for key %s exceeds 255 characters", key)
		}
	}
	return nil
}

func BuildSCIMPayload(userRef string, givenName string, familyName string, rawEmail string, matrix AttributeMatrix, roles []string) (*SCIMUserRequest, error) {
	email, err := NormalizeEmail(rawEmail)
	if err != nil {
		return nil, fmt.Errorf("email normalization failed: %w", err)
	}

	if err := ValidateAttributeMatrix(matrix, MaxAttributeCount); err != nil {
		return nil, fmt.Errorf("attribute matrix validation failed: %w", err)
	}

	var scimRoles []struct {
		Value string `json:"value"`
	}
	for _, r := range roles {
		scimRoles = append(scimRoles, struct{ Value string }{Value: r})
	}

	return &SCIMUserRequest{
		Schemas:  []string{ScimUserSchema},
		UserName: email,
		Name: struct {
			GivenName  string `json:"givenName"`
			FamilyName string `json:"familyName"`
		}{
			GivenName:  givenName,
			FamilyName: familyName,
		},
		Emails: []struct {
			Value   string `json:"value"`
			Primary bool   `json:"primary"`
		}{
			{Value: email, Primary: true},
		},
		Active:     true,
		ExternalID: userRef,
		Attributes: matrix,
		Roles:      scimRoles,
	}, nil
}

Step 2: License Verification and Duplicate Detection

Genesys Cloud enforces license quotas and prevents duplicate userName or externalId values. This step queries available licenses and performs a SCIM search to detect duplicates before attempting creation.

import (
	"context"
	"encoding/json"
	"fmt"
	"net/http"
	"net/url"
)

type LicenseSummary struct {
	Total      int `json:"total"`
	Available  int `json:"available"`
	Used       int `json:"used"`
}

type SCIMSearchResponse struct {
	TotalResults int `json:"totalResults"`
	Resources    []struct {
		UserName   string `json:"userName"`
		ExternalID string `json:"externalId"`
	} `json:"Resources"`
}

func CheckLicenseAvailability(ctx context.Context, tm *TokenManager, baseURL string) error {
	token, err := tm.GetToken(ctx)
	if err != nil {
		return fmt.Errorf("token retrieval failed: %w", err)
	}

	req, err := http.NewRequestWithContext(ctx, http.MethodGet, baseURL+"/api/v2/users/licenses", nil)
	if err != nil {
		return fmt.Errorf("request creation failed: %w", err)
	}
	req.Header.Set("Authorization", "Bearer "+token)
	req.Header.Set("Accept", "application/json")

	resp, err := tm.httpClient.Do(req)
	if err != nil {
		return fmt.Errorf("license check request failed: %w", err)
	}
	defer resp.Body.Close()

	if resp.StatusCode == http.StatusUnauthorized {
		return errors.New("401 unauthorized: verify client credentials and scopes")
	}
	if resp.StatusCode == http.StatusForbidden {
		return errors.New("403 forbidden: missing scim:users:read scope")
	}

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

	if summary.Available <= 0 {
		return errors.New("no available licenses for provisioning")
	}
	return nil
}

func CheckDuplicateUser(ctx context.Context, tm *TokenManager, baseURL string, email string, externalID string) (bool, error) {
	token, err := tm.GetToken(ctx)
	if err != nil {
		return false, fmt.Errorf("token retrieval failed: %w", err)
	}

	filter := fmt.Sprintf("userName eq \"%s\" or externalId eq \"%s\"", email, externalID)
	searchURL := fmt.Sprintf("%s/api/v2/scim/v2/Users?filter=%s", baseURL, url.QueryEscape(filter))

	req, err := http.NewRequestWithContext(ctx, http.MethodGet, searchURL, nil)
	if err != nil {
		return false, fmt.Errorf("request creation failed: %w", err)
	}
	req.Header.Set("Authorization", "Bearer "+token)
	req.Header.Set("Accept", "application/json")

	resp, err := tm.httpClient.Do(req)
	if err != nil {
		return false, fmt.Errorf("duplicate check request failed: %w", err)
	}
	defer resp.Body.Close()

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

	return searchResp.TotalResults > 0, nil
}

Step 3: Atomic Provisioning, Metrics, and Audit Logging

This step executes the SCIM POST operation with exponential backoff for 429 responses. It tracks latency, success rates, and generates structured audit logs. The provisioner also emits a synchronization event for external IdP webhooks.

import (
	"bytes"
	"context"
	"encoding/json"
	"fmt"
	"log/slog"
	"net/http"
	"os"
	"sync/atomic"
	"time"
)

type ProvisionResult struct {
	UserID    string
	ExternalID string
	Latency   time.Duration
	Success   bool
	Error     string
}

type ProvisionerMetrics struct {
	TotalAttempts  atomic.Int64
	Successful     atomic.Int64
	Failed         atomic.Int64
	AvgLatency     atomic.Int64 // stored as milliseconds
}

type UserProvisioner struct {
	TokenManager *TokenManager
	BaseURL      string
	HttpClient   *http.Client
	Metrics      *ProvisionerMetrics
	AuditLogger  *slog.Logger
	WebhookURL   string
}

func NewUserProvisioner(tm *TokenManager, baseURL string, webhookURL string) *UserProvisioner {
	file, _ := os.Create("provision_audit.log")
	logger := slog.New(slog.NewJSONHandler(file, nil))
	return &UserProvisioner{
		TokenManager: tm,
		BaseURL:      baseURL,
		HttpClient:   &http.Client{Timeout: 30 * time.Second},
		Metrics:      &ProvisionerMetrics{},
		AuditLogger:  logger,
		WebhookURL:   webhookURL,
	}
}

func (p *UserProvisioner) Provision(ctx context.Context, payload *SCIMUserRequest) (ProvisionResult, error) {
	start := time.Now()
	p.Metrics.TotalAttempts.Add(1)

	result := ProvisionResult{
		ExternalID: payload.ExternalID,
	}

	payloadBytes, err := json.Marshal(payload)
	if err != nil {
		result.Error = fmt.Sprintf("payload serialization failed: %w", err)
		p.logAudit("FAIL", payload.ExternalID, result.Error)
		p.Metrics.Failed.Add(1)
		return result, err
	}

	token, err := p.TokenManager.GetToken(ctx)
	if err != nil {
		result.Error = fmt.Sprintf("authentication failed: %w", err)
		p.logAudit("FAIL", payload.ExternalID, result.Error)
		p.Metrics.Failed.Add(1)
		return result, err
	}

	var lastErr error
	maxRetries := 3
	for attempt := 0; attempt <= maxRetries; attempt++ {
		req, err := http.NewRequestWithContext(ctx, http.MethodPost, p.BaseURL+"/api/v2/scim/v2/Users", bytes.NewBuffer(payloadBytes))
		if err != nil {
			return result, fmt.Errorf("request creation failed: %w", err)
		}
		req.Header.Set("Authorization", "Bearer "+token)
		req.Header.Set("Content-Type", "application/json")
		req.Header.Set("Accept", "application/json")

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

		if resp.StatusCode == http.StatusTooManyRequests {
			backoff := time.Duration(attempt+1) * time.Second
			slog.Warn("rate limited, retrying", "attempt", attempt, "backoff", backoff)
			time.Sleep(backoff)
			continue
		}

		if resp.StatusCode == http.StatusCreated {
			var createdUser struct {
				ID         string `json:"id"`
				ExternalID string `json:"externalId"`
			}
			if err := json.NewDecoder(resp.Body).Decode(&createdUser); err != nil {
				lastErr = fmt.Errorf("failed to decode creation response: %w", err)
				continue
			}

			latency := time.Since(start)
			result.UserID = createdUser.ID
			result.Latency = latency
			result.Success = true

			p.Metrics.Successful.Add(1)
			p.Metrics.AvgLatency.Add(int64(latency.Milliseconds()))
			p.logAudit("SUCCESS", payload.ExternalID, fmt.Sprintf("user_id=%s latency=%s", createdUser.ID, latency))
			p.syncWebhook(ctx, createdUser.ID, payload.ExternalID)

			return result, nil
		}

		if resp.StatusCode == http.StatusConflict {
			lastErr = errors.New("409 conflict: user already exists with this email or externalId")
			break
		}

		if resp.StatusCode == http.StatusBadRequest {
			lastErr = errors.New("400 bad request: invalid SCIM payload schema")
			break
		}

		lastErr = fmt.Errorf("unexpected status code: %d", resp.StatusCode)
	}

	result.Error = lastErr.Error()
	result.Latency = time.Since(start)
	p.Metrics.Failed.Add(1)
	p.logAudit("FAIL", payload.ExternalID, result.Error)

	return result, lastErr
}

func (p *UserProvisioner) logAudit(status string, externalID string, message string) {
	p.AuditLogger.Info("provision_event",
		"status", status,
		"external_id", externalID,
		"message", message,
		"timestamp", time.Now().UTC().Format(time.RFC3339))
}

func (p *UserProvisioner) syncWebhook(ctx context.Context, userID string, externalID string) {
	payload := map[string]string{
		"event":    "user.created",
		"user_id":  userID,
		"ext_id":   externalID,
		"source":   "genesys_scim_provisioner",
		"timestamp": time.Now().UTC().Format(time.RFC3339),
	}
	body, _ := json.Marshal(payload)

	req, _ := http.NewRequestWithContext(ctx, http.MethodPost, p.WebhookURL, bytes.NewBuffer(body))
	req.Header.Set("Content-Type", "application/json")
	go func() {
		resp, err := p.HttpClient.Do(req)
		if err != nil || resp.StatusCode >= 400 {
			slog.Error("webhook sync failed", "error", err, "status", resp.StatusCode)
		}
	}()
}

Complete Working Example

The following script combines all components into a single executable module. Replace the placeholder credentials and base URL before running.

package main

import (
	"context"
	"fmt"
	"log/slog"
	"os"
	"time"
)

func main() {
	slog.SetDefault(slog.New(slog.NewTextHandler(os.Stdout, &slog.HandlerOptions{Level: slog.LevelInfo})))

	cfg := OAuthConfig{
		ClientID:     "YOUR_CLIENT_ID",
		ClientSecret: "YOUR_CLIENT_SECRET",
		BaseURL:      "https://api.mypurecloud.com",
	}

	tm := NewTokenManager(cfg)
	provisioner := NewUserProvisioner(tm, cfg.BaseURL, "https://your-idp.example.com/webhooks/genesys-users")

	ctx := context.Background()

	// Step 1: Verify license capacity
	if err := CheckLicenseAvailability(ctx, tm, cfg.BaseURL); err != nil {
		slog.Error("license check failed", "error", err)
		os.Exit(1)
	}

	// Step 2: Build SCIM payload
	matrix := AttributeMatrix{
		"department": "Engineering",
		"costCenter": "CC-4021",
		"employeeType": "Full-Time",
	}

	payload, err := BuildSCIMPayload(
		"EXT-USER-8842",
		"Jane",
		"Doe",
		"  Jane.Doe@Example.COM  ",
		matrix,
		[]string{"Agent", "Supervisor"},
	)
	if err != nil {
		slog.Error("payload construction failed", "error", err)
		os.Exit(1)
	}

	// Step 3: Duplicate detection
	isDuplicate, err := CheckDuplicateUser(ctx, tm, cfg.BaseURL, payload.UserName, payload.ExternalID)
	if err != nil {
		slog.Error("duplicate check failed", "error", err)
		os.Exit(1)
	}
	if isDuplicate {
		slog.Warn("skipping provision: duplicate detected", "email", payload.UserName, "ext_id", payload.ExternalID)
		os.Exit(0)
	}

	// Step 4: Execute atomic provisioning
	result, err := provisioner.Provision(ctx, payload)
	if err != nil {
		slog.Error("provisioning failed", "error", err)
		os.Exit(1)
	}

	slog.Info("provisioning complete",
		"user_id", result.UserID,
		"external_id", result.ExternalID,
		"latency", result.Latency.String(),
		"success", result.Success)

	// Step 5: Print metrics snapshot
	total := provisioner.Metrics.TotalAttempts.Load()
	success := provisioner.Metrics.Successful.Load()
	fail := provisioner.Metrics.Failed.Load()
	avgLatency := int64(0)
	if total > 0 {
		avgLatency = provisioner.Metrics.AvgLatency.Load() / total
	}

	slog.Info("provisioner_metrics",
		"total_attempts", total,
		"successful", success,
		"failed", fail,
		"avg_latency_ms", avgLatency)
}

Common Errors & Debugging

Error: 401 Unauthorized

• Cause: Expired or invalid OAuth token, or incorrect client credentials.
• Fix: Verify client_id and client_secret match the Genesys Cloud OAuth application. Ensure the token manager refreshes tokens before expiration.
• Code: The TokenManager automatically refreshes when expiresAt approaches. Check logs for oauth token request failed.

Error: 403 Forbidden

• Cause: Missing required OAuth scopes on the client application.
• Fix: Add scim:users:write and scim:users:read to the OAuth application scopes in the Genesys Cloud admin console. Reauthorize the client credentials.
• Code: Explicitly request scopes in the grant payload: scope=scim:users:write+scim:users:read.

Error: 409 Conflict

• Cause: Duplicate userName (email) or externalId already exists in the Genesys Cloud tenant.
• Fix: Use the pre-provision duplicate check (CheckDuplicateUser) to skip or update existing records. SCIM 2.0 returns 409 when the constraint is violated.
• Code: The CheckDuplicateUser function queries /api/v2/scim/v2/Users?filter=... before POST. If totalResults > 0, abort creation.

Error: 429 Too Many Requests

• Cause: Exceeding Genesys Cloud API rate limits (typically 10-20 requests per second per client).
• Fix: Implement exponential backoff. The Provision method retries up to 3 times with increasing delays.
• Code: The retry loop sleeps for time.Duration(attempt+1) * time.Second on 429 responses before retrying the POST.

Error: 400 Bad Request

• Cause: Invalid SCIM schema, missing required fields, or attribute matrix exceeding maximum count limits.
• Fix: Validate schemas array matches urn:ietf:params:scim:schemas:core:2.0:User. Ensure userName and name are present. Keep custom attributes under MaxAttributeCount.
• Code: ValidateAttributeMatrix enforces the 50-attribute limit. BuildSCIMPayload enforces email format and required fields.

Official References

• Genesys Cloud SCIM 2.0 API Documentation
• Genesys Cloud OAuth 2.0 Client Credentials Flow
• Genesys Cloud User License Management API
• SCIM 2.0 Core Schema Specification (RFC 7643)