diff --git a/src/integration/checkout/services/checkout.service.ts b/src/integration/checkout/services/checkout.service.ts
index b57d7d7b36..ae793ffa6f 100644
--- a/src/integration/checkout/services/checkout.service.ts
+++ b/src/integration/checkout/services/checkout.service.ts
@@ -36,6 +36,10 @@ export class CheckoutService {
     this.checkout = new Checkout();
   }
 
+  isAvailable(): boolean {
+    return process.env.CKO_SECRET_KEY != null && Config.checkout.entityId != null;
+  }
+
   async createPaymentLink(
     remittanceInfo: string,
     fiatAmount: number,
diff --git a/src/integration/exchange/services/exchange-tx.service.ts b/src/integration/exchange/services/exchange-tx.service.ts
index 59f41698c4..10212b0ad7 100644
--- a/src/integration/exchange/services/exchange-tx.service.ts
+++ b/src/integration/exchange/services/exchange-tx.service.ts
@@ -24,6 +24,8 @@ import { ExchangeRegistryService } from './exchange-registry.service';
 export class ExchangeTxService {
   private readonly logger = new DfxLogger(ExchangeTxService);
 
+  private readonly syncWarningsLogged = new Set<string>();
+
   constructor(
     private readonly exchangeTxRepo: ExchangeTxRepository,
     private readonly registryService: ExchangeRegistryService,
@@ -171,7 +173,10 @@ export class ExchangeTxService {
 
       return transactions;
     } catch (e) {
-      this.logger.error(`Failed to synchronize transactions from ${sync.exchange}:`, e);
+      if (!this.syncWarningsLogged.has(sync.exchange)) {
+        this.logger.warn(`Failed to synchronize transactions from ${sync.exchange}:`, e);
+        this.syncWarningsLogged.add(sync.exchange);
+      }
     }
 
     return [];
diff --git a/src/subdomains/core/monitoring/observers/checkout.observer.ts b/src/subdomains/core/monitoring/observers/checkout.observer.ts
index 5bad9a248d..cf1f5e0f15 100644
--- a/src/subdomains/core/monitoring/observers/checkout.observer.ts
+++ b/src/subdomains/core/monitoring/observers/checkout.observer.ts
@@ -20,6 +20,8 @@ interface CheckoutData {
 export class CheckoutObserver extends MetricObserver<CheckoutData[]> {
   protected readonly logger = new DfxLogger(CheckoutObserver);
 
+  private unavailableWarningLogged = false;
+
   constructor(
     monitoringService: MonitoringService,
     private readonly checkoutService: CheckoutService,
@@ -30,6 +32,14 @@ export class CheckoutObserver extends MetricObserver<CheckoutData[]> {
 
   @DfxCron(CronExpression.EVERY_MINUTE, { process: Process.MONITORING, timeout: 1800 })
   async fetch() {
+    if (!this.checkoutService.isAvailable()) {
+      if (!this.unavailableWarningLogged) {
+        this.logger.warn('Checkout not configured - skipping fetch');
+        this.unavailableWarningLogged = true;
+      }
+      return [];
+    }
+
     const data = await this.getCheckout();
 
     this.emit(data);
diff --git a/src/subdomains/core/monitoring/observers/payment.observer.ts b/src/subdomains/core/monitoring/observers/payment.observer.ts
index 6bc841c96d..ae5ba99576 100644
--- a/src/subdomains/core/monitoring/observers/payment.observer.ts
+++ b/src/subdomains/core/monitoring/observers/payment.observer.ts
@@ -125,8 +125,8 @@ export class PaymentObserver extends MetricObserver<PaymentData> {
     return {
       buyCrypto: await this.repos.buyCrypto
         .findOne({ where: {}, order: { outputDate: 'DESC' } })
-        .then((b) => b.outputDate),
-      buyFiat: await this.repos.buyFiat.findOne({ where: {}, order: { outputDate: 'DESC' } }).then((b) => b.outputDate),
+        .then((b) => b?.outputDate),
+      buyFiat: await this.repos.buyFiat.findOne({ where: {}, order: { outputDate: 'DESC' } }).then((b) => b?.outputDate),
     };
   }
 }
diff --git a/src/subdomains/core/payment-link/services/payment-balance.service.ts b/src/subdomains/core/payment-link/services/payment-balance.service.ts
index 9426374abb..bf05319207 100644
--- a/src/subdomains/core/payment-link/services/payment-balance.service.ts
+++ b/src/subdomains/core/payment-link/services/payment-balance.service.ts
@@ -20,6 +20,8 @@ import { Util } from 'src/shared/utils/util';
 export class PaymentBalanceService implements OnModuleInit {
   private readonly logger = new DfxLogger(PaymentBalanceService);
 
+  private readonly unavailableWarningsLogged = new Set<Blockchain>();
+
   private readonly chainsWithoutPaymentBalance = [
     Blockchain.LIGHTNING,
     Blockchain.MONERO,
@@ -65,17 +67,27 @@ export class PaymentBalanceService implements OnModuleInit {
     await Promise.all(
       groupedAssets.map(async ([chain, assets]) => {
         const client = this.blockchainRegistryService.getClient(chain);
+        if (!client) {
+          if (!this.unavailableWarningsLogged.has(chain)) {
+            this.logger.warn(`Blockchain client not configured for ${chain} - skipping payment balance`);
+            this.unavailableWarningsLogged.add(chain);
+          }
+          return;
+        }
 
         const targetAddress = this.getDepositAddress(chain);
+        if (!targetAddress) return;
 
         const coin = assets.find((a) => a.type === AssetType.COIN);
         const tokens = assets.filter((a) => a.type !== AssetType.COIN);
 
-        balanceMap.set(coin.id, {
-          owner: targetAddress,
-          contractAddress: coin.chainId,
-          balance: await client.getNativeCoinBalanceForAddress(targetAddress),
-        });
+        if (coin) {
+          balanceMap.set(coin.id, {
+            owner: targetAddress,
+            contractAddress: coin.chainId,
+            balance: await client.getNativeCoinBalanceForAddress(targetAddress),
+          });
+        }
 
         if (tokens.length) {
           try {
diff --git a/src/subdomains/supporting/bank-tx/bank-tx/services/bank-tx.service.ts b/src/subdomains/supporting/bank-tx/bank-tx/services/bank-tx.service.ts
index b1c4b788c9..4ff089405b 100644
--- a/src/subdomains/supporting/bank-tx/bank-tx/services/bank-tx.service.ts
+++ b/src/subdomains/supporting/bank-tx/bank-tx/services/bank-tx.service.ts
@@ -85,6 +85,8 @@ export class BankTxService implements OnModuleInit {
   private readonly logger = new DfxLogger(BankTxService);
   private readonly bankBalanceSubject: Subject<BankBalanceUpdate> = new Subject<BankBalanceUpdate>();
 
+  private olkyUnavailableWarningLogged = false;
+
   constructor(
     private readonly bankTxRepo: BankTxRepository,
     private readonly bankTxBatchRepo: BankTxBatchRepository,
@@ -164,7 +166,10 @@ export class BankTxService implements OnModuleInit {
 
     const olkyBank = await this.bankService.getBankInternal(IbanBankName.OLKY, 'EUR');
     if (!olkyBank) {
-      this.logger.warn('Olky bank not configured - skipping checkTransactions');
+      if (!this.olkyUnavailableWarningLogged) {
+        this.logger.warn('Olky bank not configured - skipping checkTransactions');
+        this.olkyUnavailableWarningLogged = true;
+      }
       return;
     }
 
diff --git a/src/subdomains/supporting/fiat-payin/services/fiat-payin-sync.service.ts b/src/subdomains/supporting/fiat-payin/services/fiat-payin-sync.service.ts
index 8603e33715..c56e71ed63 100644
--- a/src/subdomains/supporting/fiat-payin/services/fiat-payin-sync.service.ts
+++ b/src/subdomains/supporting/fiat-payin/services/fiat-payin-sync.service.ts
@@ -19,6 +19,8 @@ import { CheckoutTxService } from './checkout-tx.service';
 export class FiatPayInSyncService {
   private readonly logger = new DfxLogger(FiatPayInSyncService);
 
+  private unavailableWarningLogged = false;
+
   constructor(
     private readonly checkoutService: CheckoutService,
     private readonly checkoutTxRepo: CheckoutTxRepository,
@@ -32,6 +34,14 @@ export class FiatPayInSyncService {
 
   @DfxCron(CronExpression.EVERY_MINUTE, { process: Process.FIAT_PAY_IN, timeout: 1800 })
   async syncCheckout() {
+    if (!this.checkoutService.isAvailable()) {
+      if (!this.unavailableWarningLogged) {
+        this.logger.warn('Checkout not configured - skipping syncCheckout');
+        this.unavailableWarningLogged = true;
+      }
+      return;
+    }
+
     const syncDate = await this.checkoutTxService.getSyncDate();
     const payments = await this.checkoutService.getPayments(syncDate);
 
diff --git a/src/subdomains/supporting/log/log-job.service.ts b/src/subdomains/supporting/log/log-job.service.ts
index e5f31b6e3f..d7a495d206 100644
--- a/src/subdomains/supporting/log/log-job.service.ts
+++ b/src/subdomains/supporting/log/log-job.service.ts
@@ -60,6 +60,8 @@ import { LogService } from './log.service';
 export class LogJobService {
   private readonly logger = new DfxLogger(LogJobService);
 
+  private readonly unavailableClientWarningsLogged = new Set<Blockchain>();
+
   constructor(
     private readonly tradingRuleService: TradingRuleService,
     private readonly assetService: AssetService,
@@ -218,6 +220,13 @@ export class LogJobService {
       Array.from(customAssetMap.entries()).map(async ([b, a]) => {
         try {
           const client = this.blockchainRegistryService.getClient(b);
+          if (!client) {
+            if (!this.unavailableClientWarningsLogged.has(b)) {
+              this.logger.warn(`Blockchain client not configured for ${b} - skipping custom balances`);
+              this.unavailableClientWarningsLogged.add(b);
+            }
+            return { blockchain: b, balances: [] };
+          }
 
           const balances = await this.getCustomBalances(client, a, Config.financialLog.customAddresses).then((b) =>
             b.flat(),
diff --git a/src/subdomains/supporting/payin/strategies/register/impl/bitcoin.strategy.ts b/src/subdomains/supporting/payin/strategies/register/impl/bitcoin.strategy.ts
index c2325cd46b..1413f3956f 100644
--- a/src/subdomains/supporting/payin/strategies/register/impl/bitcoin.strategy.ts
+++ b/src/subdomains/supporting/payin/strategies/register/impl/bitcoin.strategy.ts
@@ -20,6 +20,8 @@ export class BitcoinStrategy extends PollingStrategy {
 
   @Inject() private readonly depositService: DepositService;
 
+  private unavailableWarningLogged = false;
+
   constructor(private readonly payInBitcoinService: PayInBitcoinService) {
     super();
   }
@@ -32,7 +34,10 @@ export class BitcoinStrategy extends PollingStrategy {
   @DfxCron(CronExpression.EVERY_SECOND, { process: Process.PAY_IN, timeout: 7200 })
   async checkPayInEntries(): Promise<void> {
     if (!this.payInBitcoinService.isAvailable()) {
-      this.logger.warn('Bitcoin node not configured - skipping checkPayInEntries');
+      if (!this.unavailableWarningLogged) {
+        this.logger.warn('Bitcoin node not configured - skipping checkPayInEntries');
+        this.unavailableWarningLogged = true;
+      }
       return;
     }
 
diff --git a/src/subdomains/supporting/payment/services/transaction-helper.ts b/src/subdomains/supporting/payment/services/transaction-helper.ts
index 752d35241e..c40467e64a 100644
--- a/src/subdomains/supporting/payment/services/transaction-helper.ts
+++ b/src/subdomains/supporting/payment/services/transaction-helper.ts
@@ -57,6 +57,7 @@ export class TransactionHelper implements OnModuleInit {
 
   private readonly addressBalanceCache = new AsyncCache<number>(CacheItemResetPeriod.EVERY_HOUR);
   private readonly user30dVolumeCache = new AsyncCache<number>(CacheItemResetPeriod.EVERY_HOUR);
+  private readonly unavailableClientWarningsLogged = new Set<Blockchain>();
 
   private transactionSpecifications: TransactionSpecification[];
 
@@ -606,6 +607,14 @@ export class TransactionHelper implements OnModuleInit {
 
     try {
       const client = this.blockchainRegistryService.getClient(to.blockchain);
+      if (!client) {
+        if (!this.unavailableClientWarningsLogged.has(to.blockchain)) {
+          this.logger.warn(`Blockchain client not configured for ${to.blockchain} - skipping network start fee`);
+          this.unavailableClientWarningsLogged.add(to.blockchain);
+        }
+        return 0;
+      }
+
       const userBalance = await this.addressBalanceCache.get(`${user.address}-${to.blockchain}`, () =>
         client.getNativeCoinBalanceForAddress(user.address),
       );