diff --git a/Makefile b/Makefile
index 0d56371..82a1bc3 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,21 @@
+define HELP_TEXT
+Welcome!
+
+Targets:
+  help		provides help text
+  deps		resolve dependencies
+  lint		lint source for errors or breaking changes
+  legal		prepends license to source code
+
+endef
+export HELP_TEXT
+
+help:
+	@echo "$$HELP_TEXT"
+
+deps:
+	buf mod update
+
 lint:
 	buf lint
 	addlicense -check -f ./legal/header.txt -skip yaml -skip yml -skip xml .
diff --git a/buf.lock b/buf.lock
new file mode 100644
index 0000000..4144ecf
--- /dev/null
+++ b/buf.lock
@@ -0,0 +1,8 @@
+# Generated by buf. DO NOT EDIT.
+version: v1
+deps:
+  - remote: buf.build
+    owner: googleapis
+    repository: googleapis
+    commit: a86849a25cc04f4dbe9b15ddddfbc488
+    digest: shake256:e19143328f8cbfe13fc226aeee5e63773ca494693a72740a7560664270039a380d94a1344234b88c7691311460df9a9b1c2982190d0a2612eae80368718e1943
diff --git a/buf.yaml b/buf.yaml
index 5fc4486..732d25a 100644
--- a/buf.yaml
+++ b/buf.yaml
@@ -1,4 +1,6 @@
 version: v1
+deps:
+  - buf.build/googleapis/googleapis
 lint:
   use:
     - DEFAULT
diff --git a/contributors/v1/service.proto b/contributors/v1/service.proto
index bc87f01..6ab72f1 100644
--- a/contributors/v1/service.proto
+++ b/contributors/v1/service.proto
@@ -12,6 +12,44 @@ syntax = "proto3";
 
 package contributors.v1;
 
-service ContributorService {
+import "google/api/annotations.proto";
 
+message ListRequest {}
+message ListResponse {}
+
+message CreateRequest {}
+message CreateResponse {}
+
+message UpdateRequest {}
+message UpdateResponse {}
+
+message DeleteRequest {}
+message DeleteResponse {}
+
+service ContributorService {
+  rpc List(ListRequest) returns (ListResponse) {
+    option (google.api.http) = {
+      get: "/v1/products/{product_id}/contributors"
+    };
+  };
+
+  rpc Create(CreateRequest) returns (CreateResponse) {
+    option (google.api.http) = {
+      post: "/v1/products/{product_id}/contributors"
+      body: "*"
+    };
+  };
+
+  rpc Update(UpdateRequest) returns (UpdateResponse) {
+    option (google.api.http) = {
+      post: "/v1/products/{product_id}/contributors/{contributor_id}"
+      body: "*"
+    };
+  };
+
+  rpc Delete(DeleteRequest) returns (DeleteResponse) {
+    option (google.api.http) = {
+      delete: "/v1/products/{product_id}/contributors/{contributor_id}"
+    };
+  };
 }
diff --git a/licenses/v1/service.proto b/licenses/v1/service.proto
index b411526..73d807b 100644
--- a/licenses/v1/service.proto
+++ b/licenses/v1/service.proto
@@ -12,6 +12,35 @@ syntax = "proto3";
 
 package licenses.v1;
 
-service LicenseService {
+import "google/api/annotations.proto";
 
+message ListRequest {}
+message ListResponse {}
+
+message PurchaseRequest {}
+message PurchaseResponse {}
+
+message CancelRequest {}
+message CancelResponse {}
+
+service LicenseService {
+  rpc List(ListRequest) returns (ListResponse) {
+    option (google.api.http) = {
+      get: "/v1/licenses"
+    };
+  };
+
+  rpc Purchase(PurchaseRequest) returns (PurchaseResponse) {
+    option (google.api.http) = {
+      post: "/v1/licenses"
+      body: "*"
+    };
+  };
+
+  rpc Cancel(CancelRequest) returns (CancelResponse) {
+    option (google.api.http) = {
+      post: "/v1/licenses/{license_id}"
+      body: "*"
+    };
+  };
 }
diff --git a/packages/v1/service.proto b/packages/v1/service.proto
index c294708..adfd7e0 100644
--- a/packages/v1/service.proto
+++ b/packages/v1/service.proto
@@ -12,6 +12,53 @@ syntax = "proto3";
 
 package packages.v1;
 
-service PackageService {
+import "google/api/annotations.proto";
 
+message ListRequest {}
+message ListResponse {}
+
+message CreateRequest {}
+message CreateResponse {}
+
+message ReadRequest {}
+message ReadResponse {}
+
+message UpdateRequest {}
+message UpdateResponse {}
+
+message DeleteRequest {}
+message DeleteResponse {}
+
+service PackageService {
+  rpc List(ListRequest) returns (ListResponse) {
+    option (google.api.http) = {
+      get: "/v1/products/{product_id}/packages"
+    };
+  };
+
+  rpc Create(CreateRequest) returns (CreateResponse) {
+    option (google.api.http) = {
+      post: "/v1/products/{product_id}/packages"
+      body: "*"
+    };
+  };
+
+  rpc Read(ReadRequest) returns (ReadResponse) {
+    option (google.api.http) = {
+      get: "/v1/products/{product_id}/packages/{package_name}"
+    };
+  };
+
+  rpc Update(UpdateRequest) returns (UpdateResponse) {
+    option (google.api.http) = {
+      post: "/v1/products/{product_id}/packages/{package_name}"
+      body: "*"
+    };
+  };
+
+  rpc Delete(DeleteRequest) returns (DeleteResponse) {
+    option (google.api.http) = {
+      delete: "/v1/products/{product_id}/packages/{package_name}"
+    };
+  };
 }
diff --git a/products/v1/service.proto b/products/v1/service.proto
index 061f1b9..a1fdd4c 100644
--- a/products/v1/service.proto
+++ b/products/v1/service.proto
@@ -12,6 +12,53 @@ syntax = "proto3";
 
 package products.v1;
 
-service ProductService {
+import "google/api/annotations.proto";
 
+message ListRequest {}
+message ListResponse {}
+
+message CreateRequest {}
+message CreateResponse {}
+
+message ReadRequest {}
+message ReadResponse {}
+
+message UpdateRequest {}
+message UpdateResponse {}
+
+message DeleteRequest {}
+message DeleteResponse {}
+
+service ProductService {
+  rpc List(ListRequest) returns (ListResponse) {
+    option (google.api.http) = {
+      get: "/v1/products"
+    };
+  };
+
+  rpc Create(CreateRequest) returns (CreateResponse) {
+    option (google.api.http) = {
+      post: "/v1/products"
+      body: "*"
+    };
+  };
+
+  rpc Read(ReadRequest) returns (ReadResponse) {
+    option (google.api.http) = {
+      get: "/v1/products/{product_id}"
+    };
+  };
+
+  rpc Update(UpdateRequest) returns (UpdateResponse) {
+    option (google.api.http) = {
+      post: "/v1/products/{product_id}"
+      body: "*"
+    };
+  };
+
+  rpc Delete(DeleteRequest) returns (DeleteResponse) {
+    option (google.api.http) = {
+      delete: "/v1/products/{product_id}"
+    };
+  };
 }
diff --git a/tokens/v1/service.proto b/tokens/v1/service.proto
new file mode 100644
index 0000000..39b5ad3
--- /dev/null
+++ b/tokens/v1/service.proto
@@ -0,0 +1,55 @@
+// Copyright (C) 2023 The Licensing Authors
+// SPDX-License-Identifier: MIT
+
+//
+// This file attempts to follow common styles and design patterns described by
+// Google Cloud based on their extensive use of protocol buffers.
+//
+// - See here for more: https://cloud.google.com/apis/design/design_patterns
+//
+
+syntax = "proto3";
+
+package tokens.v1;
+
+import "google/api/annotations.proto";
+
+message AuthenticateRequest {}
+message AuthenticateResponse {}
+
+message ListRequest {}
+message ListResponse {}
+
+message CreateRequest {}
+message CreateResponse {}
+
+message DeleteRequest {}
+message DeleteResponse {}
+
+service TokenService {
+  rpc Authenticate(AuthenticateRequest) returns (AuthenticateResponse) {
+    option (google.api.http) = {
+      post: "/v1/token"
+      body: "*"
+    };
+  };
+
+  rpc List(ListRequest) returns (ListResponse) {
+    option (google.api.http) = {
+      get: "/v1/tokens"
+    };
+  };
+
+  rpc Create(CreateRequest) returns (CreateResponse) {
+    option (google.api.http) = {
+      post: "/v1/tokens"
+      body: "*"
+    };
+  };
+
+  rpc Delete(DeleteRequest) returns (DeleteResponse) {
+    option (google.api.http) = {
+      delete: "/v1/tokens/{token_id}"
+    };
+  };
+}
diff --git a/users/v1/service.proto b/users/v1/service.proto
index 7be756a..cbe0f19 100644
--- a/users/v1/service.proto
+++ b/users/v1/service.proto
@@ -12,6 +12,8 @@ syntax = "proto3";
 
 package users.v1;
 
+import "google/api/annotations.proto";
+
 message SignupRequest {}
 message SignupResponse {}
 
@@ -19,6 +21,16 @@ message CurrentRequest {}
 message CurrentResponse {}
 
 service UserService {
-  rpc Signup(SignupRequest) returns (SignupResponse);
-  rpc Current(CurrentRequest) returns (CurrentResponse);
+  rpc Signup(SignupRequest) returns (SignupResponse) {
+    option (google.api.http) = {
+      post: "/v1/users"
+      body: "*"
+    };
+  };
+
+  rpc Current(CurrentRequest) returns (CurrentResponse) {
+    option (google.api.http) = {
+      get: "/v1/users/current"
+    };
+  };
 }