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_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_mi_updates_transformer.tf b/infrastructure/terraform/components/api/module_lambda_mi_updates_transformer.tf
index 48f0acbe..ab69e4cf 100644
--- a/infrastructure/terraform/components/api/module_lambda_mi_updates_transformer.tf
+++ b/infrastructure/terraform/components/api/module_lambda_mi_updates_transformer.tf
@@ -24,7 +24,7 @@ module "mi_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_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/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 fcd3b099..f02dda3b 100644
--- a/lambdas/api-handler/src/handlers/get-letter.ts
+++ b/lambdas/api-handler/src/handlers/get-letter.ts
@@ -62,7 +62,7 @@ export default function createGetLetterHandler(
         );
         return {
           statusCode: 200,
-          body: JSON.stringify(response, null, 2),
+          body: JSON.stringify(response),
         };
       } catch (error) {
         emitForSingleSupplier(
diff --git a/lambdas/api-handler/src/handlers/get-letters.ts b/lambdas/api-handler/src/handlers/get-letters.ts
index a1d1c47f..34d11bef 100644
--- a/lambdas/api-handler/src/handlers/get-letters.ts
+++ b/lambdas/api-handler/src/handlers/get-letters.ts
@@ -137,7 +137,7 @@ export default function createGetLettersHandler(
         );
         return {
           statusCode: 200,
-          body: JSON.stringify(response, null, 2),
+          body: JSON.stringify(response),
         };
       } catch (error) {
         emitForSingleSupplier(