diff --git a/infrastructure/terraform/components/api/module_lambda_get_letter.tf b/infrastructure/terraform/components/api/module_lambda_get_letter.tf
index 0186f17f..e34dc824 100644
--- a/infrastructure/terraform/components/api/module_lambda_get_letter.tf
+++ b/infrastructure/terraform/components/api/module_lambda_get_letter.tf
@@ -24,7 +24,7 @@ module "get_letter" {
   function_include_common = true
   handler_function_name   = "getLetter"
   runtime                 = "nodejs22.x"
-  memory                  = 128
+  memory                  = 512
   timeout                 = 29
   log_level               = var.log_level
 
diff --git a/infrastructure/terraform/components/api/module_lambda_get_letter_data.tf b/infrastructure/terraform/components/api/module_lambda_get_letter_data.tf
index 2ae2c82a..2ac82b20 100644
--- a/infrastructure/terraform/components/api/module_lambda_get_letter_data.tf
+++ b/infrastructure/terraform/components/api/module_lambda_get_letter_data.tf
@@ -24,7 +24,7 @@ module "get_letter_data" {
   function_include_common = true
   handler_function_name   = "getLetterData"
   runtime                 = "nodejs22.x"
-  memory                  = 128
+  memory                  = 512
   timeout                 = 29
   log_level               = var.log_level
 
diff --git a/infrastructure/terraform/components/api/module_lambda_get_letters.tf b/infrastructure/terraform/components/api/module_lambda_get_letters.tf
index 61ed6cba..6bb3ca21 100644
--- a/infrastructure/terraform/components/api/module_lambda_get_letters.tf
+++ b/infrastructure/terraform/components/api/module_lambda_get_letters.tf
@@ -24,7 +24,7 @@ module "get_letters" {
   function_include_common = true
   handler_function_name   = "getLetters"
   runtime                 = "nodejs22.x"
-  memory                  = 128
+  memory                  = 1024
   timeout                 = 29
   log_level               = var.log_level
 
diff --git a/infrastructure/terraform/components/api/module_lambda_get_status.tf b/infrastructure/terraform/components/api/module_lambda_get_status.tf
index 41035a86..4adde672 100644
--- a/infrastructure/terraform/components/api/module_lambda_get_status.tf
+++ b/infrastructure/terraform/components/api/module_lambda_get_status.tf
@@ -24,7 +24,7 @@ module "get_status" {
   function_include_common = true
   handler_function_name   = "getStatus"
   runtime                 = "nodejs22.x"
-  memory                  = 128
+  memory                  = 512
   timeout                 = 29
   log_level               = var.log_level
 
diff --git a/infrastructure/terraform/components/api/module_lambda_letter_status_update.tf b/infrastructure/terraform/components/api/module_lambda_letter_status_update.tf
index 59393bd2..b9d97fec 100644
--- a/infrastructure/terraform/components/api/module_lambda_letter_status_update.tf
+++ b/infrastructure/terraform/components/api/module_lambda_letter_status_update.tf
@@ -24,7 +24,7 @@ module "letter_status_update" {
   function_include_common = true
   handler_function_name   = "letterStatusUpdate"
   runtime                 = "nodejs22.x"
-  memory                  = 128
+  memory                  = 512
   timeout                 = 29
   log_level               = var.log_level
 
diff --git a/infrastructure/terraform/components/api/module_lambda_letter_updates_transformer.tf b/infrastructure/terraform/components/api/module_lambda_letter_updates_transformer.tf
index 10adf649..d30c8c84 100644
--- a/infrastructure/terraform/components/api/module_lambda_letter_updates_transformer.tf
+++ b/infrastructure/terraform/components/api/module_lambda_letter_updates_transformer.tf
@@ -24,7 +24,7 @@ module "letter_updates_transformer" {
   function_include_common = true
   handler_function_name   = "handler"
   runtime                 = "nodejs22.x"
-  memory                  = 128
+  memory                  = 512
   timeout                 = 29
   log_level               = var.log_level
 
diff --git a/infrastructure/terraform/components/api/module_lambda_patch_letter.tf b/infrastructure/terraform/components/api/module_lambda_patch_letter.tf
index b09c303f..d10e8f24 100644
--- a/infrastructure/terraform/components/api/module_lambda_patch_letter.tf
+++ b/infrastructure/terraform/components/api/module_lambda_patch_letter.tf
@@ -24,7 +24,7 @@ module "patch_letter" {
   function_include_common = true
   handler_function_name   = "patchLetter"
   runtime                 = "nodejs22.x"
-  memory                  = 128
+  memory                  = 512
   timeout                 = 29
   log_level               = var.log_level
 
diff --git a/infrastructure/terraform/components/api/module_lambda_post_letters.tf b/infrastructure/terraform/components/api/module_lambda_post_letters.tf
index 8eb8ad52..79b3b3f0 100644
--- a/infrastructure/terraform/components/api/module_lambda_post_letters.tf
+++ b/infrastructure/terraform/components/api/module_lambda_post_letters.tf
@@ -24,7 +24,7 @@ module "post_letters" {
   function_include_common = true
   handler_function_name   = "postLetters"
   runtime                 = "nodejs22.x"
-  memory                  = 128
+  memory                  = 512
   timeout                 = 29
   log_level               = var.log_level
 
diff --git a/infrastructure/terraform/components/api/module_lambda_post_mi.tf b/infrastructure/terraform/components/api/module_lambda_post_mi.tf
index 867a1693..416d4149 100644
--- a/infrastructure/terraform/components/api/module_lambda_post_mi.tf
+++ b/infrastructure/terraform/components/api/module_lambda_post_mi.tf
@@ -24,7 +24,7 @@ module "post_mi" {
   function_include_common = true
   handler_function_name   = "postMI"
   runtime                 = "nodejs22.x"
-  memory                  = 128
+  memory                  = 512
   timeout                 = 29
   log_level               = var.log_level
 
diff --git a/infrastructure/terraform/components/api/module_lambda_upsert_letter.tf b/infrastructure/terraform/components/api/module_lambda_upsert_letter.tf
index b4a4278b..0e8e99a0 100644
--- a/infrastructure/terraform/components/api/module_lambda_upsert_letter.tf
+++ b/infrastructure/terraform/components/api/module_lambda_upsert_letter.tf
@@ -24,7 +24,7 @@ module "upsert_letter" {
   function_include_common = true
   handler_function_name   = "handler"
   runtime                 = "nodejs22.x"
-  memory                  = 128
+  memory                  = 512
   timeout                 = 29
   log_level               = var.log_level
 
diff --git a/lambdas/api-handler/src/handlers/__tests__/get-letter.test.ts b/lambdas/api-handler/src/handlers/__tests__/get-letter.test.ts
index 030fca48..1d85a219 100644
--- a/lambdas/api-handler/src/handlers/__tests__/get-letter.test.ts
+++ b/lambdas/api-handler/src/handlers/__tests__/get-letter.test.ts
@@ -69,7 +69,7 @@ describe("API Lambda handler", () => {
 
     expect(result).toEqual({
       statusCode: 200,
-      body: JSON.stringify(expected, null, 2),
+      body: JSON.stringify(expected),
     });
   });
 
@@ -113,7 +113,7 @@ describe("API Lambda handler", () => {
 
     expect(result).toEqual({
       statusCode: 200,
-      body: JSON.stringify(expected, null, 2),
+      body: JSON.stringify(expected),
     });
   });
 
diff --git a/lambdas/api-handler/src/handlers/__tests__/get-letters.test.ts b/lambdas/api-handler/src/handlers/__tests__/get-letters.test.ts
index 6723084a..564e4b83 100644
--- a/lambdas/api-handler/src/handlers/__tests__/get-letters.test.ts
+++ b/lambdas/api-handler/src/handlers/__tests__/get-letters.test.ts
@@ -124,7 +124,7 @@ describe("API Lambda handler", () => {
 
     expect(result).toEqual({
       statusCode: 200,
-      body: JSON.stringify(expected, null, 2),
+      body: JSON.stringify(expected),
     });
   });
 
@@ -177,7 +177,7 @@ describe("API Lambda handler", () => {
 
     expect(result).toEqual({
       statusCode: 200,
-      body: JSON.stringify(expected, null, 2),
+      body: JSON.stringify(expected),
     });
   });
 
diff --git a/lambdas/api-handler/src/handlers/get-letter.ts b/lambdas/api-handler/src/handlers/get-letter.ts
index a88a4882..fde407fe 100644
--- a/lambdas/api-handler/src/handlers/get-letter.ts
+++ b/lambdas/api-handler/src/handlers/get-letter.ts
@@ -50,7 +50,7 @@ export default function createGetLetterHandler(
 
       return {
         statusCode: 200,
-        body: JSON.stringify(response, null, 2),
+        body: JSON.stringify(response),
       };
     } catch (error) {
       return processError(error, commonIds.value.correlationId, deps.logger);
diff --git a/lambdas/api-handler/src/handlers/get-letters.ts b/lambdas/api-handler/src/handlers/get-letters.ts
index adc3febc..72b0be9d 100644
--- a/lambdas/api-handler/src/handlers/get-letters.ts
+++ b/lambdas/api-handler/src/handlers/get-letters.ts
@@ -125,7 +125,7 @@ export default function createGetLettersHandler(
 
       return {
         statusCode: 200,
-        body: JSON.stringify(response, null, 2),
+        body: JSON.stringify(response),
       };
     } catch (error) {
       return processError(error, commonIds.value.correlationId, deps.logger);