Retrieving Genesys Cloud Agent Assist Cards via REST API with Go

What You Will Build

• A Go service that fetches Agent Assist cards from Genesys Cloud using interaction ID references, skill matrices, and card type filters.
• The implementation uses the official Genesys Cloud REST endpoint /api/v2/knowledge/documents/search with explicit payload construction and validation.
• The tutorial covers Go 1.21+ with concurrent response caching, webhook synchronization, latency tracking, audit logging, and an exposed retriever interface.

Prerequisites

• OAuth confidential client with knowledge:view and agentassist:view scopes
• Genesys Cloud organization URL (e.g., https://orgname.mygen.com)
• Go 1.21 or later
• Standard library dependencies only (net/http, context, sync, time, encoding/json, log/slog, fmt, strings)

Authentication Setup

Genesys Cloud uses OAuth 2.0 client credentials flow for server-to-server API access. You must cache the token and refresh it before expiration to avoid 401 responses during high-throughput retrieval cycles.

package main

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

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

func FetchOAuthToken(ctx context.Context, clientID, clientSecret, authURL string) (string, error) {
	payload := fmt.Sprintf("client_id=%s&client_secret=%s&grant_type=client_credentials&scope=knowledge:view+agentassist:view", clientID, clientSecret)
	req, err := http.NewRequestWithContext(ctx, http.MethodPost, authURL, bytes.NewBufferString(payload))
	if err != nil {
		return "", fmt.Errorf("oauth request creation failed: %w", err)
	}
	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")

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

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

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

The token expires based on the expires_in field. A production implementation must store the token with a time.Time expiration marker and refresh it when time.Until(expiration) < 30 * time.Second.

Implementation

Step 1: Payload Construction and Validation

Agent Assist retrieval requires a structured search payload. You must enforce maximum card count limits, validate skill matrices, and filter by card type to prevent information overload. Data privacy constraints require stripping or validating sensitive fields before transmission.

type AgentAssistPayload struct {
	Query             string   `json:"query"`
	LanguageCode      string   `json:"languageCode"`
	KnowledgeBaseIds  []string `json:"knowledgeBaseIds,omitempty"`
	AgentAssistContext struct {
		InteractionID    string   `json:"interactionId"`
		SkillMatrix      []string `json:"skillMatrix"`
		CardTypeFilters  []string `json:"cardTypeFilters"`
		MaxCards         int      `json:"maxCards"`
		InteractionState string   `json:"interactionState"`
	} `json:"agentAssistContext"`
}

func ValidatePayload(p AgentAssistPayload) error {
	if p.AgentAssistContext.MaxCards > 20 {
		return fmt.Errorf("maxCards exceeds privacy and performance limit of 20")
	}
	if p.AgentAssistContext.MaxCards < 1 {
		return fmt.Errorf("maxCards must be at least 1")
	}
	validStates := map[string]bool{"ACTIVE": true, "WORK": true, "HANDOFF": true}
	if !validStates[p.AgentAssistContext.InteractionState] {
		return fmt.Errorf("interaction state %s is not eligible for assist retrieval", p.AgentAssistContext.InteractionState)
	}
	return nil
}

Step 2: Atomic GET/POST Execution with Retry and Caching

Genesys Cloud returns 429 responses under high load. You must implement exponential backoff. The retrieval operation uses an atomic HTTP call wrapped in a cache layer to prevent redundant network requests for identical interaction IDs.

type CardResult struct {
	ID          string  `json:"id"`
	Title       string  `json:"title"`
	Summary     string  `json:"summary"`
	Relevance   float64 `json:"relevance"`
	CardType    string  `json:"cardType"`
	ContextData map[string]interface{} `json:"contextData"`
}

type CacheEntry struct {
	Data      []CardResult
	ExpiresAt time.Time
}

var cardCache = make(map[string]*CacheEntry)
var cacheMu sync.RWMutex

func FetchCards(ctx context.Context, baseURL, token string, payload AgentAssistPayload) ([]CardResult, error) {
	cacheKey := fmt.Sprintf("%s_%s_%d", payload.AgentAssistContext.InteractionID, payload.Query, payload.AgentAssistContext.MaxCards)
	cacheMu.RLock()
	if entry, exists := cardCache[cacheKey]; exists {
		cacheMu.RUnlock()
		if time.Now().Before(entry.ExpiresAt) {
			return entry.Data, nil
		}
	}
	cacheMu.RUnlock()

	endpoint := fmt.Sprintf("%s/api/v2/knowledge/documents/search", baseURL)
	jsonPayload, err := json.Marshal(payload)
	if err != nil {
		return nil, fmt.Errorf("payload marshal failed: %w", err)
	}

	client := &http.Client{Timeout: 15 * time.Second}
	var resp *http.Response
	var body []byte

	for attempt := 0; attempt < 3; attempt++ {
		req, err := http.NewRequestWithContext(ctx, http.MethodPost, endpoint, bytes.NewBuffer(jsonPayload))
		if err != nil {
			return nil, 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 = client.Do(req)
		if err != nil {
			return nil, fmt.Errorf("http client error: %w", err)
		}
		defer resp.Body.Close()

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

		if resp.StatusCode == http.StatusTooManyRequests {
			backoff := time.Duration(1<<uint(attempt)) * time.Second
			time.Sleep(backoff)
			continue
		}
		if resp.StatusCode != http.StatusOK {
			return nil, fmt.Errorf("api error %d: %s", resp.StatusCode, string(body))
		}
		break
	}

	if resp.StatusCode != http.StatusOK {
		return nil, fmt.Errorf("exhausted retries, last status %d", resp.StatusCode)
	}

	var searchResp struct {
		Documents []CardResult `json:"documents"`
	}
	if err := json.Unmarshal(body, &searchResp); err != nil {
		return nil, fmt.Errorf("response decode failed: %w", err)
	}

	cacheMu.Lock()
	cardCache[cacheKey] = &CacheEntry{
		Data:      searchResp.Documents,
		ExpiresAt: time.Now().Add(2 * time.Minute),
	}
	cacheMu.Unlock()

	return searchResp.Documents, nil
}

Step 3: Context Enrichment and Role Verification Pipeline

Before delivering cards to the agent interface, you must verify the agent role and enrich missing context data. This step prevents unauthorized data exposure and ensures relevance scoring is accurate.

func VerifyAgentRole(role string) bool {
	allowedRoles := map[string]bool{"Agent": true, "Supervisor": true, "QA": true}
	return allowedRoles[role]
}

func EnrichContext(cards []CardResult, interactionID string) []CardResult {
	enriched := make([]CardResult, 0, len(cards))
	for _, c := range cards {
		if c.Relevance == 0 {
			c.Relevance = 0.5
		}
		if c.ContextData == nil {
			c.ContextData = make(map[string]interface{})
		}
		c.ContextData["interactionId"] = interactionID
		c.ContextData["enrichedAt"] = time.Now().UTC().Format(time.RFC3339)
		enriched = append(enriched, c)
	}
	return enriched
}

Step 4: Webhook Synchronization, Latency Tracking, and Audit Logging

Retrieval completion events must synchronize with external knowledge management systems. You will track latency, log relevance scores, and generate audit records for compliance.

type RetrievalAudit struct {
	InteractionID string    `json:"interactionId"`
	AgentRole     string    `json:"agentRole"`
	CardsReturned int       `json:"cardsReturned"`
	AvgRelevance  float64   `json:"avgRelevance"`
	LatencyMs     int64     `json:"latencyMs"`
	Timestamp     time.Time `json:"timestamp"`
}

func SyncWebhook(ctx context.Context, webhookURL string, audit RetrievalAudit) error {
	payload, err := json.Marshal(audit)
	if err != nil {
		return fmt.Errorf("webhook marshal failed: %w", err)
	}
	req, err := http.NewRequestWithContext(ctx, http.MethodPost, webhookURL, bytes.NewBuffer(payload))
	if err != nil {
		return fmt.Errorf("webhook request creation failed: %w", err)
	}
	req.Header.Set("Content-Type", "application/json")

	client := &http.Client{Timeout: 5 * time.Second}
	resp, err := client.Do(req)
	if err != nil {
		return fmt.Errorf("webhook delivery failed: %w", err)
	}
	defer resp.Body.Close()

	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
		return fmt.Errorf("webhook returned status %d", resp.StatusCode)
	}
	return nil
}

func LogAudit(audit RetrievalAudit) {
	slog.Info("agent_assist_retrieval",
		"interaction_id", audit.InteractionID,
		"agent_role", audit.AgentRole,
		"cards_returned", audit.CardsReturned,
		"avg_relevance", audit.AvgRelevance,
		"latency_ms", audit.LatencyMs,
		"timestamp", audit.Timestamp)
}

Complete Working Example

The following module combines authentication, validation, caching, enrichment, webhook synchronization, and audit logging into a single exposed retriever interface. Replace placeholder credentials with your OAuth client details and organization URL.

package main

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

// --- Models ---
type OAuthTokenResponse struct {
	AccessToken string `json:"access_token"`
	ExpiresIn   int    `json:"expires_in"`
}

type AgentAssistPayload struct {
	Query          string   `json:"query"`
	LanguageCode   string   `json:"languageCode"`
	KnowledgeBaseIds []string `json:"knowledgeBaseIds,omitempty"`
	AgentAssistContext struct {
		InteractionID    string   `json:"interactionId"`
		SkillMatrix      []string `json:"skillMatrix"`
		CardTypeFilters  []string `json:"cardTypeFilters"`
		MaxCards         int      `json:"maxCards"`
		InteractionState string   `json:"interactionState"`
	} `json:"agentAssistContext"`
}

type CardResult struct {
	ID          string                 `json:"id"`
	Title       string                 `json:"title"`
	Summary     string                 `json:"summary"`
	Relevance   float64                `json:"relevance"`
	CardType    string                 `json:"cardType"`
	ContextData map[string]interface{} `json:"contextData"`
}

type RetrievalAudit struct {
	InteractionID string    `json:"interactionId"`
	AgentRole     string    `json:"agentRole"`
	CardsReturned int       `json:"cardsReturned"`
	AvgRelevance  float64   `json:"avgRelevance"`
	LatencyMs     int64     `json:"latencyMs"`
	Timestamp     time.Time `json:"timestamp"`
}

type CacheEntry struct {
	Data      []CardResult
	ExpiresAt time.Time
}

var cardCache = make(map[string]*CacheEntry)
var cacheMu sync.RWMutex

// --- Core Logic ---
func FetchOAuthToken(ctx context.Context, clientID, clientSecret, authURL string) (string, error) {
	payload := fmt.Sprintf("client_id=%s&client_secret=%s&grant_type=client_credentials&scope=knowledge:view+agentassist:view", clientID, clientSecret)
	req, _ := http.NewRequestWithContext(ctx, http.MethodPost, authURL, bytes.NewBufferString(payload))
	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	client := &http.Client{Timeout: 10 * time.Second}
	resp, err := client.Do(req)
	if err != nil {
		return "", fmt.Errorf("oauth fetch failed: %w", err)
	}
	defer resp.Body.Close()
	if resp.StatusCode != http.StatusOK {
		return "", fmt.Errorf("oauth status %d", resp.StatusCode)
	}
	var tr OAuthTokenResponse
	json.NewDecoder(resp.Body).Decode(&tr)
	return tr.AccessToken, nil
}

func ValidatePayload(p AgentAssistPayload) error {
	if p.AgentAssistContext.MaxCards > 20 || p.AgentAssistContext.MaxCards < 1 {
		return fmt.Errorf("maxCards must be between 1 and 20")
	}
	validStates := map[string]bool{"ACTIVE": true, "WORK": true, "HANDOFF": true}
	if !validStates[p.AgentAssistContext.InteractionState] {
		return fmt.Errorf("invalid interaction state: %s", p.AgentAssistContext.InteractionState)
	}
	return nil
}

func FetchCards(ctx context.Context, baseURL, token string, payload AgentAssistPayload) ([]CardResult, error) {
	cacheKey := fmt.Sprintf("%s_%s_%d", payload.AgentAssistContext.InteractionID, payload.Query, payload.AgentAssistContext.MaxCards)
	cacheMu.RLock()
	if entry, exists := cardCache[cacheKey]; exists {
		cacheMu.RUnlock()
		if time.Now().Before(entry.ExpiresAt) {
			return entry.Data, nil
		}
	}
	cacheMu.RUnlock()

	endpoint := fmt.Sprintf("%s/api/v2/knowledge/documents/search", baseURL)
	jsonPayload, _ := json.Marshal(payload)
	client := &http.Client{Timeout: 15 * time.Second}
	var resp *http.Response

	for attempt := 0; attempt < 3; attempt++ {
		req, _ := http.NewRequestWithContext(ctx, http.MethodPost, endpoint, bytes.NewBuffer(jsonPayload))
		req.Header.Set("Authorization", "Bearer "+token)
		req.Header.Set("Content-Type", "application/json")
		req.Header.Set("Accept", "application/json")
		resp, err := client.Do(req)
		if err != nil {
			return nil, fmt.Errorf("http client error: %w", err)
		}
		body, _ := io.ReadAll(resp.Body)
		resp.Body.Close()

		if resp.StatusCode == http.StatusTooManyRequests {
			time.Sleep(time.Duration(1<<uint(attempt)) * time.Second)
			continue
		}
		if resp.StatusCode != http.StatusOK {
			return nil, fmt.Errorf("api error %d: %s", resp.StatusCode, string(body))
		}
		break
	}

	if resp.StatusCode != http.StatusOK {
		return nil, fmt.Errorf("exhausted retries")
	}

	var searchResp struct {
		Documents []CardResult `json:"documents"`
	}
	json.Unmarshal(body, &searchResp)

	cacheMu.Lock()
	cardCache[cacheKey] = &CacheEntry{Data: searchResp.Documents, ExpiresAt: time.Now().Add(2 * time.Minute)}
	cacheMu.Unlock()

	return searchResp.Documents, nil
}

func VerifyAgentRole(role string) bool {
	allowed := map[string]bool{"Agent": true, "Supervisor": true, "QA": true}
	return allowed[role]
}

func EnrichContext(cards []CardResult, interactionID string) []CardResult {
	enriched := make([]CardResult, 0, len(cards))
	for _, c := range cards {
		if c.Relevance == 0 {
			c.Relevance = 0.5
		}
		if c.ContextData == nil {
			c.ContextData = make(map[string]interface{})
		}
		c.ContextData["interactionId"] = interactionID
		c.ContextData["enrichedAt"] = time.Now().UTC().Format(time.RFC3339)
		enriched = append(enriched, c)
	}
	return enriched
}

func SyncWebhook(ctx context.Context, webhookURL string, audit RetrievalAudit) error {
	payload, _ := json.Marshal(audit)
	req, _ := http.NewRequestWithContext(ctx, http.MethodPost, webhookURL, bytes.NewBuffer(payload))
	req.Header.Set("Content-Type", "application/json")
	client := &http.Client{Timeout: 5 * time.Second}
	resp, err := client.Do(req)
	if err != nil {
		return fmt.Errorf("webhook delivery failed: %w", err)
	}
	defer resp.Body.Close()
	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
		return fmt.Errorf("webhook status %d", resp.StatusCode)
	}
	return nil
}

func LogAudit(audit RetrievalAudit) {
	slog.Info("agent_assist_retrieval",
		"interaction_id", audit.InteractionID,
		"agent_role", audit.AgentRole,
		"cards_returned", audit.CardsReturned,
		"avg_relevance", audit.AvgRelevance,
		"latency_ms", audit.LatencyMs,
		"timestamp", audit.Timestamp)
}

// --- Exposed Retriever Interface ---
type AssistCardRetriever struct {
	BaseURL    string
	ClientID   string
	ClientSecret string
	AuthURL    string
	WebhookURL string
	Token      string
	TokenExpiry time.Time
}

func (r *AssistCardRetriever) EnsureToken(ctx context.Context) error {
	if time.Now().Before(r.TokenExpiry.Add(-30 * time.Second)) {
		return nil
	}
	token, err := FetchOAuthToken(ctx, r.ClientID, r.ClientSecret, r.AuthURL)
	if err != nil {
		return err
	}
	r.Token = token
	r.TokenExpiry = time.Now().Add(3600 * time.Second)
	return nil
}

func (r *AssistCardRetriever) Retrieve(ctx context.Context, payload AgentAssistPayload, agentRole string) ([]CardResult, error) {
	if err := ValidatePayload(payload); err != nil {
		return nil, fmt.Errorf("payload validation failed: %w", err)
	}
	if !VerifyAgentRole(agentRole) {
		return nil, fmt.Errorf("agent role %s is not authorized for assist retrieval", agentRole)
	}

	if err := r.EnsureToken(ctx); err != nil {
		return nil, fmt.Errorf("authentication failed: %w", err)
	}

	start := time.Now()
	cards, err := FetchCards(ctx, r.BaseURL, r.Token, payload)
	if err != nil {
		return nil, fmt.Errorf("card fetch failed: %w", err)
	}
	latency := time.Since(start).Milliseconds()

	cards = EnrichContext(cards, payload.AgentAssistContext.InteractionID)

	var totalRel float64
	for _, c := range cards {
		totalRel += c.Relevance
	}
	avgRel := 0.0
	if len(cards) > 0 {
		avgRel = totalRel / float64(len(cards))
	}

	audit := RetrievalAudit{
		InteractionID: payload.AgentAssistContext.InteractionID,
		AgentRole:     agentRole,
		CardsReturned: len(cards),
		AvgRelevance:  avgRel,
		LatencyMs:     latency,
		Timestamp:     time.Now().UTC(),
	}
	LogAudit(audit)

	go func() {
		if err := SyncWebhook(ctx, r.WebhookURL, audit); err != nil {
			slog.Error("webhook sync failed", "err", err)
		}
	}()

	return cards, nil
}

func main() {
	ctx := context.Background()
	retriever := &AssistCardRetriever{
		BaseURL:      "https://yourorg.mygen.com",
		ClientID:     "your_client_id",
		ClientSecret: "your_client_secret",
		AuthURL:      "https://yourorg.mygen.com/oauth/token",
		WebhookURL:   "https://your-km-system.example.com/api/assist-sync",
	}

	payload := AgentAssistPayload{
		Query:        "payment refund policy",
		LanguageCode: "en-US",
		AgentAssistContext: struct {
			InteractionID    string
			SkillMatrix      []string
			CardTypeFilters  []string
			MaxCards         int
			InteractionState string
		}{
			InteractionID:    "conv-12345-xyz",
			SkillMatrix:      []string{"billing", "customer_service"},
			CardTypeFilters:  []string{"procedure", "faq"},
			MaxCards:         10,
			InteractionState: "WORK",
		},
	}

	cards, err := retriever.Retrieve(ctx, payload, "Agent")
	if err != nil {
		slog.Error("retrieval failed", "err", err)
		return
	}
	for _, c := range cards {
		fmt.Printf("Card: %s | Type: %s | Relevance: %.2f\n", c.Title, c.CardType, c.Relevance)
	}
}

Common Errors & Debugging

Error: 401 Unauthorized

• Cause: The OAuth token expired or was never successfully fetched. The token cache did not refresh before expiration.
• Fix: Ensure the EnsureToken method checks time.Until(r.TokenExpiry) < 30 * time.Second before issuing requests. Verify the confidential client has knowledge:view and agentassist:view scopes assigned in the Genesys Cloud admin console.
• Code Fix: The EnsureToken method in the complete example handles automatic refresh. Add explicit token validation headers to debug proxy logs.

Error: 403 Forbidden

• Cause: The OAuth client lacks permissions to access the specified knowledge bases, or the agent role verification pipeline rejected the request.
• Fix: Assign the confidential client to a role with Knowledge Admin or Knowledge Viewer permissions. Verify that VerifyAgentRole matches your organization role hierarchy.
• Code Fix: Log the exact role passed to Retrieve and compare it against the allowedRoles map. Update the map to include custom role names.

Error: 429 Too Many Requests

• Cause: Genesys Cloud rate limits triggered by concurrent retrieval calls or rapid retry loops.
• Fix: The implementation uses exponential backoff (1<<uint(attempt)). Reduce request frequency or increase cache TTL. Implement request queuing for high-volume environments.
• Code Fix: The FetchCards method already implements a 3-attempt backoff loop. Adjust time.Sleep duration or add jitter to prevent thundering herd scenarios.

Error: Payload Validation Failure

• Cause: maxCards exceeds 20, or interactionState is not ACTIVE, WORK, or HANDOFF.
• Fix: Enforce strict schema validation before network transmission. Adjust business logic to respect Genesys Cloud search result limits.
• Code Fix: The ValidatePayload function blocks invalid requests. Update limits if your organization has negotiated higher quotas.

Official References

• Genesys Cloud Knowledge Search API Documentation
• Agent Assist Configuration and Retrieval Guide
• OAuth 2.0 Client Credentials Flow
• Rate Limiting and Retry Guidelines