diff --git a/packages/io-ts-http/src/statusCode.ts b/packages/io-ts-http/src/statusCode.ts
index a7185191..d0d01b43 100644
--- a/packages/io-ts-http/src/statusCode.ts
+++ b/packages/io-ts-http/src/statusCode.ts
@@ -6,6 +6,7 @@ export const HttpToKeyStatus = {
   401: 'unauthenticated',
   403: 'permissionDenied',
   404: 'notFound',
+  409: 'conflict',
   429: 'rateLimitExceeded',
   500: 'internalError',
   503: 'serviceUnavailable',
@@ -19,6 +20,7 @@ export const KeyToHttpStatus = {
   unauthenticated: 401,
   permissionDenied: 403,
   notFound: 404,
+  conflict: 409,
   rateLimitExceeded: 429,
   internalError: 500,
   serviceUnavailable: 503,
diff --git a/packages/response/src/index.ts b/packages/response/src/index.ts
index cd7cdb41..a8db6cdc 100644
--- a/packages/response/src/index.ts
+++ b/packages/response/src/index.ts
@@ -1,41 +1,2 @@
-/*
- * @api-ts/response
- */
-
-// HTTP                        | GRPC               | Response
-// ----------------------------|--------------------|---------------------------
-// 400 (bad request)           | INVALID_ARGUMENT   | Response.invalidRequest
-// 401 (unauthorized)          | UNAUTHENTICATED    | Response.unauthenticated
-// 403 (forbidden)             | PERMISSION_DENIED  | Response.permissionDenied
-// 404 (not found)             | NOT_FOUND          | Response.notFound
-// 405 (method not allowed)    | NOT_FOUND          | Response.notFound
-// 429 (rate-limit)            | RESOURCE_EXHAUSTED | Response.rateLimitExceeded
-// 500 (internal server error) | INTERNAL           | Response.internalError
-// 503 (service unavailable)   | UNAVAILABLE        | Response.serviceUnavailable
-
-export type Status =
-  | 'ok'
-  | 'invalidRequest'
-  | 'unauthenticated'
-  | 'permissionDenied'
-  | 'notFound'
-  | 'rateLimitExceeded'
-  | 'internalError'
-  | 'serviceUnavailable';
-
-export type Response = { type: Status; payload: unknown };
-
-const responseFunction =
-  <S extends Status>(status: S) =>
-  <T>(payload: T) => ({ type: status, payload });
-
-export const Response = {
-  ok: responseFunction('ok'),
-  invalidRequest: responseFunction('invalidRequest'),
-  unauthenticated: responseFunction('unauthenticated'),
-  permissionDenied: responseFunction('permissionDenied'),
-  notFound: responseFunction('notFound'),
-  rateLimitExceeded: responseFunction('rateLimitExceeded'),
-  internalError: responseFunction('internalError'),
-  serviceUnavailable: responseFunction('serviceUnavailable'),
-};
+export * from './response';
+export * from './keyed-response';
diff --git a/packages/response/src/keyed-response.ts b/packages/response/src/keyed-response.ts
new file mode 100644
index 00000000..7a063e39
--- /dev/null
+++ b/packages/response/src/keyed-response.ts
@@ -0,0 +1,44 @@
+/*
+ * @api-ts/response
+ */
+
+// HTTP                        | GRPC               | Response
+// ----------------------------|--------------------|---------------------------
+// 400 (bad request)           | INVALID_ARGUMENT   | Response.invalidRequest
+// 401 (unauthorized)          | UNAUTHENTICATED    | Response.unauthenticated
+// 403 (forbidden)             | PERMISSION_DENIED  | Response.permissionDenied
+// 404 (not found)             | NOT_FOUND          | Response.notFound
+// 405 (method not allowed)    | NOT_FOUND          | Response.notFound
+// 409 (conflict)              | ALREADY_EXISTS     | Response.conflict
+// 429 (rate-limit)            | RESOURCE_EXHAUSTED | Response.rateLimitExceeded
+// 500 (internal server error) | INTERNAL           | Response.internalError
+// 503 (service unavailable)   | UNAVAILABLE        | Response.serviceUnavailable
+
+export type KeyedStatus =
+  | 'ok'
+  | 'invalidRequest'
+  | 'unauthenticated'
+  | 'permissionDenied'
+  | 'notFound'
+  | 'conflict'
+  | 'rateLimitExceeded'
+  | 'internalError'
+  | 'serviceUnavailable';
+
+export type KeyedResponse = { type: KeyedStatus; payload: unknown };
+
+const responseFunction =
+  <S extends KeyedStatus>(status: S) =>
+  <T>(payload: T) => ({ type: status, payload });
+
+export const KeyedResponse = {
+  ok: responseFunction('ok'),
+  invalidRequest: responseFunction('invalidRequest'),
+  unauthenticated: responseFunction('unauthenticated'),
+  permissionDenied: responseFunction('permissionDenied'),
+  notFound: responseFunction('notFound'),
+  conflict: responseFunction('conflict'),
+  rateLimitExceeded: responseFunction('rateLimitExceeded'),
+  internalError: responseFunction('internalError'),
+  serviceUnavailable: responseFunction('serviceUnavailable'),
+};
diff --git a/packages/response/src/response.ts b/packages/response/src/response.ts
new file mode 100644
index 00000000..4f65555a
--- /dev/null
+++ b/packages/response/src/response.ts
@@ -0,0 +1,35 @@
+/*
+ * @api-ts/response
+ */
+
+// HTTP                        | GRPC               | Response
+// ----------------------------|--------------------|---------------------------
+// 400 (bad request)           | INVALID_ARGUMENT   | Response.invalidRequest
+// 401 (unauthorized)          | UNAUTHENTICATED    | Response.unauthenticated
+// 403 (forbidden)             | PERMISSION_DENIED  | Response.permissionDenied
+// 404 (not found)             | NOT_FOUND          | Response.notFound
+// 405 (method not allowed)    | NOT_FOUND          | Response.notFound
+// 409 (conflict)              | ALREADY_EXISTS     | Response.conflict
+// 429 (rate-limit)            | RESOURCE_EXHAUSTED | Response.rateLimitExceeded
+// 500 (internal server error) | INTERNAL           | Response.internalError
+// 503 (service unavailable)   | UNAVAILABLE        | Response.serviceUnavailable
+
+export type Status = 200 | 400 | 401 | 403 | 404 | 409 | 429 | 500 | 503;
+
+export type Response = { type: Status; payload: unknown };
+
+const ResponseFunction =
+  <S extends Status>(status: S) =>
+  <T>(payload: T) => ({ type: status, payload });
+
+export const Response = {
+  ok: ResponseFunction(200),
+  invalidRequest: ResponseFunction(400),
+  unauthenticated: ResponseFunction(401),
+  permissionDenied: ResponseFunction(403),
+  notFound: ResponseFunction(404),
+  conflict: ResponseFunction(409),
+  rateLimitExceeded: ResponseFunction(429),
+  internalError: ResponseFunction(500),
+  serviceUnavailable: ResponseFunction(503),
+};