diff --git a/src/common/config/config-loader.service.spec.ts b/src/common/config/config-loader.service.spec.ts
index 729caf92..9f33789c 100644
--- a/src/common/config/config-loader.service.spec.ts
+++ b/src/common/config/config-loader.service.spec.ts
@@ -14,6 +14,25 @@ const DEFAULTS = {
   RPC_URL: 'some-rpc-url',
   RABBITMQ_URL: 'some-rabbit-url',
   RABBITMQ_LOGIN: 'some-rabbit-login',
+  KEYS_API_URL: 'keys-api',
+};
+
+const extractError = async <T>(
+  fn: Promise<T>,
+): Promise<[ValidationError[], T]> => {
+  try {
+    return [[], await fn];
+  } catch (error: any) {
+    return [error as ValidationError[], undefined as unknown as T];
+  }
+};
+
+const toHaveProblemWithRecords = (
+  recordsKeys: string[],
+  errors: ValidationError[],
+) => {
+  const errorKeys = errors.map((error) => error.property);
+  expect(recordsKeys.sort()).toEqual(errorKeys.sort());
 };
 
 describe('ConfigLoaderService base spec', () => {
@@ -106,6 +125,96 @@ describe('ConfigLoaderService base spec', () => {
     });
   });
 
+  describe('kapi url config', () => {
+    test('all invariants are empty', async () => {
+      const prepConfig = plainToClass(InMemoryConfiguration, {
+        RABBITMQ_PASSCODE: 'some-rabbit-passcode',
+        ...DEFAULTS,
+        KEYS_API_URL: undefined,
+      });
+      const [validationErrors] = await extractError(
+        configLoaderService.loadSecrets(prepConfig),
+      );
+
+      toHaveProblemWithRecords(
+        ['KEYS_API_URL', 'KEYS_API_PORT', 'KEYS_API_HOST'],
+        validationErrors,
+      );
+    });
+
+    test('KEYS_API_URL is set and the rest is default', async () => {
+      const KEYS_API_URL = 'kapi-url';
+      const KEYS_API_HOST = '';
+      const KEYS_API_PORT = 0;
+      const prepConfig = plainToClass(InMemoryConfiguration, {
+        RABBITMQ_PASSCODE: 'some-rabbit-passcode',
+        ...DEFAULTS,
+        KEYS_API_URL,
+      });
+      const [validationErrors, result] = await extractError(
+        configLoaderService.loadSecrets(prepConfig),
+      );
+      expect(validationErrors).toHaveLength(0);
+      expect(result.KEYS_API_URL).toBe(KEYS_API_URL);
+      expect(result.KEYS_API_HOST).toBe(KEYS_API_HOST);
+      expect(result.KEYS_API_PORT).toBe(KEYS_API_PORT);
+    });
+
+    test('KEYS_API_URL is empty and the rest is set', async () => {
+      const KEYS_API_URL = undefined;
+      const KEYS_API_HOST = 'kapi-host';
+      const KEYS_API_PORT = 2222;
+      const prepConfig = plainToClass(InMemoryConfiguration, {
+        RABBITMQ_PASSCODE: 'some-rabbit-passcode',
+        ...DEFAULTS,
+        KEYS_API_URL,
+        KEYS_API_HOST,
+        KEYS_API_PORT,
+      });
+      const [validationErrors, result] = await extractError(
+        configLoaderService.loadSecrets(prepConfig),
+      );
+      expect(validationErrors).toHaveLength(0);
+      expect(result.KEYS_API_URL).toBe(KEYS_API_URL);
+      expect(result.KEYS_API_HOST).toBe(KEYS_API_HOST);
+      expect(result.KEYS_API_PORT).toBe(KEYS_API_PORT);
+    });
+
+    test('KEYS_API_URL and KEYS_API_PORT are empty and the KEYS_API_HOST is set', async () => {
+      const KEYS_API_URL = undefined;
+      const KEYS_API_HOST = 'kapi-host';
+      const KEYS_API_PORT = 0;
+      const prepConfig = plainToClass(InMemoryConfiguration, {
+        RABBITMQ_PASSCODE: 'some-rabbit-passcode',
+        ...DEFAULTS,
+        KEYS_API_URL,
+        KEYS_API_HOST,
+        KEYS_API_PORT,
+      });
+      const [validationErrors] = await extractError(
+        configLoaderService.loadSecrets(prepConfig),
+      );
+      toHaveProblemWithRecords(['KEYS_API_PORT'], validationErrors);
+    });
+
+    test('KEYS_API_URL and KEYS_API_HOST are empty and the KEYS_API_PORT is set', async () => {
+      const KEYS_API_URL = undefined;
+      const KEYS_API_HOST = '';
+      const KEYS_API_PORT = 2222;
+      const prepConfig = plainToClass(InMemoryConfiguration, {
+        RABBITMQ_PASSCODE: 'some-rabbit-passcode',
+        ...DEFAULTS,
+        KEYS_API_URL,
+        KEYS_API_HOST,
+        KEYS_API_PORT,
+      });
+      const [validationErrors] = await extractError(
+        configLoaderService.loadSecrets(prepConfig),
+      );
+      toHaveProblemWithRecords(['KEYS_API_HOST'], validationErrors);
+    });
+  });
+
   describe('wallet', () => {
     let configLoaderService: ConfigLoaderService;
     const DEFAULTS_WITH_RABBIT = {
diff --git a/src/common/config/configuration.ts b/src/common/config/configuration.ts
index 349a6f51..5539d95a 100644
--- a/src/common/config/configuration.ts
+++ b/src/common/config/configuration.ts
@@ -31,6 +31,7 @@ export interface Configuration {
   REGISTRY_KEYS_QUERY_CONCURRENCY: number;
   KEYS_API_PORT: number;
   KEYS_API_HOST: string;
+  KEYS_API_URL: string;
   LOCATOR_DEVNET_ADDRESS: string;
   WALLET_MIN_BALANCE: ethers.BigNumber;
   WALLET_CRITICAL_BALANCE: ethers.BigNumber;
diff --git a/src/common/config/in-memory-configuration.ts b/src/common/config/in-memory-configuration.ts
index e17dc2bf..b69809cd 100644
--- a/src/common/config/in-memory-configuration.ts
+++ b/src/common/config/in-memory-configuration.ts
@@ -128,15 +128,24 @@ export class InMemoryConfiguration implements Configuration {
   @Transform(({ value }) => parseInt(value, 10), { toClassOnly: true })
   REGISTRY_KEYS_QUERY_CONCURRENCY = 5;
 
+  @ValidateIf((conf) => !conf.KEYS_API_URL)
   @IsNotEmpty()
   @IsNumber()
   @Min(1)
   @Transform(({ value }) => parseInt(value, 10), { toClassOnly: true })
-  KEYS_API_PORT = 3001;
+  KEYS_API_PORT = 0;
 
-  @IsOptional()
+  @ValidateIf((conf) => !conf.KEYS_API_URL)
+  @IsNotEmpty()
+  @IsString()
+  KEYS_API_HOST = '';
+
+  @ValidateIf((conf) => {
+    return !conf.KEYS_API_PORT && !conf.KEYS_API_HOST;
+  })
+  @IsNotEmpty()
   @IsString()
-  KEYS_API_HOST = 'http://localhost';
+  KEYS_API_URL = '';
 
   @IsOptional()
   @IsString()
diff --git a/src/keys-api/keys-api.service.ts b/src/keys-api/keys-api.service.ts
index e79931ad..e035cbca 100644
--- a/src/keys-api/keys-api.service.ts
+++ b/src/keys-api/keys-api.service.ts
@@ -16,6 +16,13 @@ export class KeysApiService {
     protected readonly fetchService: FetchService,
   ) {}
 
+  private getBaseUrl() {
+    const baseUrl =
+      this.config.KEYS_API_URL ||
+      `${this.config.KEYS_API_HOST}:${this.config.KEYS_API_PORT}`;
+    return baseUrl;
+  }
+
   protected async fetch<Response>(url: string, requestInit?: RequestInit) {
     const controller = new AbortController();
     const { signal } = controller;
@@ -24,8 +31,7 @@ export class KeysApiService {
       controller.abort();
     }, FETCH_REQUEST_TIMEOUT);
 
-    const baseUrl = `${this.config.KEYS_API_HOST}:${this.config.KEYS_API_PORT}`;
-
+    const baseUrl = this.getBaseUrl();
     try {
       const res: Response = await this.fetchService.fetchJson(
         `${baseUrl}${url}`,
@@ -34,9 +40,10 @@ export class KeysApiService {
           ...requestInit,
         },
       );
+
       clearTimeout(timer);
       return res;
-    } catch (error) {
+    } catch (error: any) {
       clearTimeout(timer);
       throw error;
     }