diff --git a/contrib/docs-code-samples/expand-api-display-access/00-create-tuples/curl.sh b/contrib/docs-code-samples/expand-api-display-access/00-create-tuples/curl.sh
index a19d5d289..22b3d3a96 100755
--- a/contrib/docs-code-samples/expand-api-display-access/00-create-tuples/curl.sh
+++ b/contrib/docs-code-samples/expand-api-display-access/00-create-tuples/curl.sh
@@ -18,6 +18,7 @@ files:/photos/mountains.jpg#access@(directories:/photos#access)' | \
   keto relation-tuple parse - --format json | \
     jq "[ .[] | { relation_tuple: . , action: \"insert\" } ]" -c | \
       curl -X PATCH --silent --fail \
+        -H 'Content-Type: application/json' \
         --data @- \
         http://127.0.0.1:4467/admin/relation-tuples
 
diff --git a/contrib/docs-code-samples/expand-api-display-access/99-cleanup/curl.sh b/contrib/docs-code-samples/expand-api-display-access/99-cleanup/curl.sh
index 442d22e34..8f7eaa141 100755
--- a/contrib/docs-code-samples/expand-api-display-access/99-cleanup/curl.sh
+++ b/contrib/docs-code-samples/expand-api-display-access/99-cleanup/curl.sh
@@ -9,6 +9,7 @@ curl -G --silent \
      http://127.0.0.1:4466/relation-tuples | \
   jq "[ .relation_tuples[] | { relation_tuple: . , action: \"delete\" } ]" -c | \
     curl -X PATCH --silent --fail \
+      -H 'Content-Type: application/json' \
       --data @- \
       http://127.0.0.1:4467/admin/relation-tuples
 
@@ -17,5 +18,6 @@ curl -G --silent \
      http://127.0.0.1:4466/relation-tuples | \
   jq "[ .relation_tuples[] | { relation_tuple: . , action: \"delete\" } ]" -c | \
     curl -X PATCH --silent --fail \
+      -H 'Content-Type: application/json' \
       --data @- \
       http://127.0.0.1:4467/admin/relation-tuples
diff --git a/contrib/docs-code-samples/list-api-display-objects/00-create-tuples/curl.sh b/contrib/docs-code-samples/list-api-display-objects/00-create-tuples/curl.sh
index 67f56f23c..c5b7c4d79 100755
--- a/contrib/docs-code-samples/list-api-display-objects/00-create-tuples/curl.sh
+++ b/contrib/docs-code-samples/list-api-display-objects/00-create-tuples/curl.sh
@@ -15,6 +15,7 @@ chats:coffee-break#member@Patrik' | \
   keto relation-tuple parse - --format json | \
     jq "[ .[] | { relation_tuple: . , action: \"insert\" } ]" -c | \
       curl -X PATCH --silent --fail \
+        -H 'Content-Type: application/json' \
         --data @- \
         http://127.0.0.1:4467/admin/relation-tuples
 
diff --git a/contrib/docs-code-samples/list-api-display-objects/99-cleanup/curl.sh b/contrib/docs-code-samples/list-api-display-objects/99-cleanup/curl.sh
index 21cb4733b..b8301c994 100755
--- a/contrib/docs-code-samples/list-api-display-objects/99-cleanup/curl.sh
+++ b/contrib/docs-code-samples/list-api-display-objects/99-cleanup/curl.sh
@@ -9,5 +9,6 @@ curl -G --silent \
      http://127.0.0.1:4466/relation-tuples | \
   jq "[ .relation_tuples[] | { relation_tuple: . , action: \"delete\" } ]" -c | \
     curl -X PATCH --silent --fail \
+      -H 'Content-Type: application/json' \
       --data @- \
       http://127.0.0.1:4467/admin/relation-tuples
diff --git a/contrib/docs-code-samples/package-lock.json b/contrib/docs-code-samples/package-lock.json
index 4d56db3c3..11d46c99d 100644
--- a/contrib/docs-code-samples/package-lock.json
+++ b/contrib/docs-code-samples/package-lock.json
@@ -14,7 +14,7 @@
       "name": "@ory/keto-grpc-client",
       "version": "0.6.0-alpha.1",
       "dependencies": {
-        "@grpc/grpc-js": "^1.7.3",
+        "@grpc/grpc-js": "1.12.4",
         "google-protobuf": "^3.21.2"
       }
     },
@@ -349,7 +349,7 @@
     "@ory/keto-grpc-client": {
       "version": "file:../../proto",
       "requires": {
-        "@grpc/grpc-js": "^1.7.3",
+        "@grpc/grpc-js": "1.12.4",
         "google-protobuf": "^3.21.2"
       }
     },
diff --git a/contrib/docs-code-samples/simple-access-check-guide/00-write-direct-access/curl.sh b/contrib/docs-code-samples/simple-access-check-guide/00-write-direct-access/curl.sh
index ab17dd867..3c4b814ba 100755
--- a/contrib/docs-code-samples/simple-access-check-guide/00-write-direct-access/curl.sh
+++ b/contrib/docs-code-samples/simple-access-check-guide/00-write-direct-access/curl.sh
@@ -10,6 +10,7 @@ relationtuple='
 }'
 
 curl --fail --silent -X PUT \
+     -H 'Content-Type: application/json' \
      --data "$relationtuple" \
      http://127.0.0.1:4467/admin/relation-tuples > /dev/null \
   && echo "Successfully created tuple" \
diff --git a/contrib/docs-code-samples/simple-access-check-guide/99-cleanup/curl.sh b/contrib/docs-code-samples/simple-access-check-guide/99-cleanup/curl.sh
index 73a7a573d..480688a2a 100755
--- a/contrib/docs-code-samples/simple-access-check-guide/99-cleanup/curl.sh
+++ b/contrib/docs-code-samples/simple-access-check-guide/99-cleanup/curl.sh
@@ -6,4 +6,5 @@ curl -X DELETE -G --silent \
      --data-urlencode "relation=decypher" \
      --data-urlencode "namespace=messages" \
      --data-urlencode "object=02y_15_4w350m3" \
+     -H 'Content-Type: application/json' \
      http://127.0.0.1:4467/admin/relation-tuples
diff --git a/proto/ory/keto/relation_tuples/v1alpha2/check_service.proto b/proto/ory/keto/relation_tuples/v1alpha2/check_service.proto
index a2c2fcd27..1925a7e9a 100644
--- a/proto/ory/keto/relation_tuples/v1alpha2/check_service.proto
+++ b/proto/ory/keto/relation_tuples/v1alpha2/check_service.proto
@@ -35,7 +35,6 @@ service CheckService {
       }
     };
     option (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_operation) = {
-      consumes: "application/x-www-form-urlencoded"
       consumes: "application/json"
       tags: "permission"
       responses: {
diff --git a/proto/ory/keto/relation_tuples/v1alpha2/expand_service.proto b/proto/ory/keto/relation_tuples/v1alpha2/expand_service.proto
index 109e74bf5..813f5135e 100644
--- a/proto/ory/keto/relation_tuples/v1alpha2/expand_service.proto
+++ b/proto/ory/keto/relation_tuples/v1alpha2/expand_service.proto
@@ -27,7 +27,7 @@ service ExpandService {
       response_body: "tree"
     };
     option (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_operation) = {
-      consumes: "application/x-www-form-urlencoded";
+      consumes: "application/json"
       tags: "permission";
       operation_id: "expandPermissions";
       responses: {
diff --git a/proto/ory/keto/relation_tuples/v1alpha2/namespaces_service.proto b/proto/ory/keto/relation_tuples/v1alpha2/namespaces_service.proto
index 33c4da071..4ec6c0148 100644
--- a/proto/ory/keto/relation_tuples/v1alpha2/namespaces_service.proto
+++ b/proto/ory/keto/relation_tuples/v1alpha2/namespaces_service.proto
@@ -21,7 +21,6 @@ service NamespacesService {
   rpc ListNamespaces(ListNamespacesRequest) returns (ListNamespacesResponse) {
     option (google.api.http) = {get: "/namespaces"};
     option (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_operation) = {
-      consumes: "application/x-www-form-urlencoded";
       tags: "relationship";
       operation_id: "listRelationshipNamespaces";
       responses: {
diff --git a/proto/ory/keto/relation_tuples/v1alpha2/read_service.proto b/proto/ory/keto/relation_tuples/v1alpha2/read_service.proto
index 86fb668a4..edef30e05 100644
--- a/proto/ory/keto/relation_tuples/v1alpha2/read_service.proto
+++ b/proto/ory/keto/relation_tuples/v1alpha2/read_service.proto
@@ -23,7 +23,6 @@ service ReadService {
   rpc ListRelationTuples(ListRelationTuplesRequest) returns (ListRelationTuplesResponse) {
     option (google.api.http) = {get: "/relation-tuples"};
     option (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_operation) = {
-      consumes: "application/x-www-form-urlencoded";
       tags: "relationship";
       operation_id: "getRelationships";
       responses: {
diff --git a/proto/ory/keto/relation_tuples/v1alpha2/write_service.proto b/proto/ory/keto/relation_tuples/v1alpha2/write_service.proto
index ecf0f6c6f..46eaecd07 100644
--- a/proto/ory/keto/relation_tuples/v1alpha2/write_service.proto
+++ b/proto/ory/keto/relation_tuples/v1alpha2/write_service.proto
@@ -77,7 +77,6 @@ service WriteService {
   rpc DeleteRelationTuples(DeleteRelationTuplesRequest) returns (DeleteRelationTuplesResponse) {
     option (google.api.http) = {delete: "/admin/relation-tuples"};
     option (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_operation) = {
-      consumes: "application/x-www-form-urlencoded";
       tags: "relationship";
       operation_id: "deleteRelationships";
       responses: {