diff --git a/docs/core/concepts/normalization.md b/docs/core/concepts/normalization.md
index f534213f1c2c..a612e50f4ea5 100644
--- a/docs/core/concepts/normalization.md
+++ b/docs/core/concepts/normalization.md
@@ -29,10 +29,6 @@ class Todo extends Entity {
   readonly userId: number = 0;
   readonly title: string = '';
   readonly completed: boolean = false;
-
-  pk() {
-    return `${this.id}`;
-  }
 }
 ```
 
@@ -40,9 +36,6 @@ class Todo extends Entity {
 import { Entity } from '@data-client/endpoint';
 
 class Todo extends Entity {
-  pk() {
-    return `${this.id}`;
-  }
 }
 ```
 
diff --git a/docs/core/guides/ssr.md b/docs/core/guides/ssr.md
index 2b47bb96a4f9..5c51b13d4022 100644
--- a/docs/core/guides/ssr.md
+++ b/docs/core/guides/ssr.md
@@ -94,10 +94,6 @@ class User extends Entity {
   id = '';
   username = '';
 
-  pk() {
-    return this.id;
-  }
-
   // highlight-next-line
   static key = 'User';
 }
diff --git a/examples/coin-app/src/resources/Currency.ts b/examples/coin-app/src/resources/Currency.ts
index f1d8666aa148..344751293d14 100644
--- a/examples/coin-app/src/resources/Currency.ts
+++ b/examples/coin-app/src/resources/Currency.ts
@@ -36,10 +36,6 @@ export class Currency extends Entity {
     return iconTable[this.id]?.img_url;
   }
 
-  pk(): string {
-    return this.id;
-  }
-
   static key = 'Currency';
 
   static process(
diff --git a/examples/coin-app/src/resources/Product.ts b/examples/coin-app/src/resources/Product.ts
index c12c5707d2ac..f130a7534f79 100644
--- a/examples/coin-app/src/resources/Product.ts
+++ b/examples/coin-app/src/resources/Product.ts
@@ -11,10 +11,6 @@ export class Product extends Entity {
   trading_disabled = false;
   stats = Stats.fromJS();
 
-  pk(): string {
-    return this.id;
-  }
-
   static key = 'Product';
   static schema = {
     stats: Stats,
diff --git a/examples/github-app/src/resources/Base.ts b/examples/github-app/src/resources/Base.ts
index 01391650feb0..7fb3bbfd13a8 100644
--- a/examples/github-app/src/resources/Base.ts
+++ b/examples/github-app/src/resources/Base.ts
@@ -24,10 +24,6 @@ const HOST = 'https://api.github.com';
 
 export class GithubEntity extends Entity {
   readonly id: number = -1;
-
-  pk() {
-    return this.id?.toString();
-  }
 }
 
 export const GithubGqlEndpoint = new GQLEndpoint(
diff --git a/examples/github-app/src/resources/Label.tsx b/examples/github-app/src/resources/Label.tsx
index a9e0378a3e41..81c52150503c 100644
--- a/examples/github-app/src/resources/Label.tsx
+++ b/examples/github-app/src/resources/Label.tsx
@@ -7,10 +7,6 @@ export class Label extends GithubEntity {
   readonly description: string = '';
   readonly color: string = '000000';
   readonly default: boolean = false;
-
-  pk() {
-    return this.id?.toString();
-  }
 }
 export const LabelResource = githubResource({
   path: '/repos/:owner/:repo/labels/:name',
diff --git a/examples/github-app/src/resources/Push.ts b/examples/github-app/src/resources/Push.ts
index 30715dbf2922..3900ae97091f 100644
--- a/examples/github-app/src/resources/Push.ts
+++ b/examples/github-app/src/resources/Push.ts
@@ -10,7 +10,7 @@ export class Push extends GithubEntity {
   commits: Commit[] = [];
 
   pk() {
-    return `${this.pushId}`;
+    return this.pushId;
   }
 }
 
diff --git a/examples/github-app/src/resources/Reaction.tsx b/examples/github-app/src/resources/Reaction.tsx
index 58e5681f4a1c..f743af24679f 100644
--- a/examples/github-app/src/resources/Reaction.tsx
+++ b/examples/github-app/src/resources/Reaction.tsx
@@ -14,10 +14,6 @@ export class Reaction extends GithubEntity {
     return contentToIcon[this.content];
   }
 
-  pk() {
-    return this.id?.toString();
-  }
-
   static schema = {
     user: User,
     createdAt: Temporal.Instant.from,
diff --git a/examples/nextjs/resources/PlaceholderBaseResource.ts b/examples/nextjs/resources/PlaceholderBaseResource.ts
index 9ad4d5fa4aba..21c92cf4c5ce 100644
--- a/examples/nextjs/resources/PlaceholderBaseResource.ts
+++ b/examples/nextjs/resources/PlaceholderBaseResource.ts
@@ -7,12 +7,8 @@ import {
 } from '@data-client/rest';
 
 export abstract class PlaceholderEntity extends Entity {
-  id = 0;
-
   // all Resources of `jsonplaceholder` use an id for the primary key
-  pk() {
-    return `${this.id}`;
-  }
+  id = 0;
 }
 
 /** Common patterns in the https://jsonplaceholder.typicode.com API */
diff --git a/examples/normalizr-github/schema.js b/examples/normalizr-github/schema.js
index e357317ba247..cfd19253f5b3 100644
--- a/examples/normalizr-github/schema.js
+++ b/examples/normalizr-github/schema.js
@@ -1,16 +1,8 @@
 import { schema, Entity } from '@data-client/endpoint';
 
-class BaseEntity extends Entity {
-  id = 0;
+export class User extends Entity {}
 
-  pk() {
-    return this.id;
-  }
-}
-
-export class User extends BaseEntity {}
-
-export class Commit extends BaseEntity {
+export class Commit extends Entity {
   sha = '';
 
   static schema = {
@@ -23,15 +15,15 @@ export class Commit extends BaseEntity {
   }
 }
 
-export class Label extends BaseEntity {}
+export class Label extends Entity {}
 
-export class Milestone extends BaseEntity {
+export class Milestone extends Entity {
   static schema = {
     creator: User,
   };
 }
 
-export class Issue extends BaseEntity {
+export class Issue extends Entity {
   static schema = {
     assignee: User,
     assignees: [User],
@@ -41,7 +33,7 @@ export class Issue extends BaseEntity {
   };
 }
 
-export class PullRequest extends BaseEntity {
+export class PullRequest extends Entity {
   static schema = {
     assignee: User,
     assignees: [User],
diff --git a/examples/normalizr-redux/src/api/schema.js b/examples/normalizr-redux/src/api/schema.js
index db1dd9994d76..cfd19253f5b3 100644
--- a/examples/normalizr-redux/src/api/schema.js
+++ b/examples/normalizr-redux/src/api/schema.js
@@ -1,16 +1,8 @@
 import { schema, Entity } from '@data-client/endpoint';
 
-class BaseEntity extends Entity {
-  id = 0;
+export class User extends Entity {}
 
-  pk() {
-    return `${this.id}`;
-  }
-}
-
-export class User extends BaseEntity {}
-
-export class Commit extends BaseEntity {
+export class Commit extends Entity {
   sha = '';
 
   static schema = {
@@ -23,15 +15,15 @@ export class Commit extends BaseEntity {
   }
 }
 
-export class Label extends BaseEntity {}
+export class Label extends Entity {}
 
-export class Milestone extends BaseEntity {
+export class Milestone extends Entity {
   static schema = {
     creator: User,
   };
 }
 
-export class Issue extends BaseEntity {
+export class Issue extends Entity {
   static schema = {
     assignee: User,
     assignees: [User],
@@ -41,7 +33,7 @@ export class Issue extends BaseEntity {
   };
 }
 
-export class PullRequest extends BaseEntity {
+export class PullRequest extends Entity {
   static schema = {
     assignee: User,
     assignees: [User],
diff --git a/examples/normalizr-relationships/schema.js b/examples/normalizr-relationships/schema.js
index cdc516f44ff6..8ff6612b0776 100644
--- a/examples/normalizr-relationships/schema.js
+++ b/examples/normalizr-relationships/schema.js
@@ -1,14 +1,6 @@
 import { Entity } from '@data-client/endpoint';
 
-class BaseEntity extends Entity {
-  id = 0;
-
-  pk() {
-    return this.id;
-  }
-}
-
-class User extends BaseEntity {
+class User extends Entity {
   static process(value, parent, key) {
     switch (key) {
       case 'author':
@@ -29,7 +21,7 @@ class User extends BaseEntity {
     };
   }
 }
-class Comment extends BaseEntity {
+class Comment extends Entity {
   static schema = {
     commenter: User,
   };
@@ -39,7 +31,7 @@ class Comment extends BaseEntity {
   }
 }
 
-class Post extends BaseEntity {
+class Post extends Entity {
   static schema = {
     author: User,
     comments: [Comment],
diff --git a/examples/todo-app/src/resources/PlaceholderBaseResource.ts b/examples/todo-app/src/resources/PlaceholderBaseResource.ts
index f07a982b0984..7820acd1b51e 100644
--- a/examples/todo-app/src/resources/PlaceholderBaseResource.ts
+++ b/examples/todo-app/src/resources/PlaceholderBaseResource.ts
@@ -8,12 +8,8 @@ import {
 import { v4 as uuid } from 'uuid';
 
 export abstract class PlaceholderEntity extends Entity {
-  id = 0;
-
   // all Resources of `jsonplaceholder` use an id for the primary key
-  pk() {
-    return `${this.id}`;
-  }
+  id = 0;
 }
 
 /** Common patterns in the https://jsonplaceholder.typicode.com API */
diff --git a/website/src/fixtures/posts-collection.ts b/website/src/fixtures/posts-collection.ts
index c53ff9bb4aef..026f43a063d7 100644
--- a/website/src/fixtures/posts-collection.ts
+++ b/website/src/fixtures/posts-collection.ts
@@ -6,10 +6,6 @@ class Post extends Entity {
   title = '';
   group = '';
   author = '';
-
-  pk() {
-    return this.id;
-  }
 }
 export const getPosts = new RestEndpoint({
   path: '/:group/posts',
diff --git a/website/src/fixtures/profiles.ts b/website/src/fixtures/profiles.ts
index ddafc0150dcb..377ffb07148b 100644
--- a/website/src/fixtures/profiles.ts
+++ b/website/src/fixtures/profiles.ts
@@ -1,4 +1,4 @@
-import { Entity, resource, RestEndpoint } from '@data-client/rest';
+import { Entity, resource } from '@data-client/rest';
 
 export class Profile extends Entity {
   id: number | undefined = undefined;
@@ -6,10 +6,6 @@ export class Profile extends Entity {
   fullName = '';
   bio = '';
 
-  pk() {
-    return this.id?.toString();
-  }
-
   static key = 'Profile';
 }