diff --git a/packages/knip/fixtures/plugins/hey-api/node_modules/@hey-api/openapi-ts/index.js b/packages/knip/fixtures/plugins/hey-api/node_modules/@hey-api/openapi-ts/index.js
new file mode 100644
index 000000000..3adec306a
--- /dev/null
+++ b/packages/knip/fixtures/plugins/hey-api/node_modules/@hey-api/openapi-ts/index.js
@@ -0,0 +1,7 @@
+export function defineConfig(config) {
+  return config;
+}
+
+export const defaultPlugins = [
+  "@hey-api/typescript", "@hey-api/sdk"
+]
diff --git a/packages/knip/fixtures/plugins/hey-api/node_modules/@hey-api/openapi-ts/package.json b/packages/knip/fixtures/plugins/hey-api/node_modules/@hey-api/openapi-ts/package.json
new file mode 100644
index 000000000..a04dea762
--- /dev/null
+++ b/packages/knip/fixtures/plugins/hey-api/node_modules/@hey-api/openapi-ts/package.json
@@ -0,0 +1,5 @@
+{
+  "name": "@hey-api/openapi-ts",
+  "main": "index.js",
+  "types": "types.ts"
+}
diff --git a/packages/knip/fixtures/plugins/hey-api/node_modules/@hey-api/openapi-ts/types.ts b/packages/knip/fixtures/plugins/hey-api/node_modules/@hey-api/openapi-ts/types.ts
new file mode 100644
index 000000000..9eb00e5c7
--- /dev/null
+++ b/packages/knip/fixtures/plugins/hey-api/node_modules/@hey-api/openapi-ts/types.ts
@@ -0,0 +1,4 @@
+declare const defineConfig: (config: Record<string, unknown>) => Record<string, unknown>;
+declare const defaultPlugins: string[];
+
+export { defineConfig, defaultPlugins };
diff --git a/packages/knip/fixtures/plugins/hey-api/openapi-ts.config.cjs b/packages/knip/fixtures/plugins/hey-api/openapi-ts.config.cjs
new file mode 100644
index 000000000..335861d0b
--- /dev/null
+++ b/packages/knip/fixtures/plugins/hey-api/openapi-ts.config.cjs
@@ -0,0 +1,8 @@
+/** @type {import('@hey-api/openapi-ts').UserConfig} */
+module.exports = {
+  input: 'https://get.heyapi.dev/hey-api/backend',
+  output: {
+    path: 'src/client2',
+  },
+  plugins: ['@hey-api/client-fetch'],
+};
diff --git a/packages/knip/fixtures/plugins/hey-api/openapi-ts.config.mjs b/packages/knip/fixtures/plugins/hey-api/openapi-ts.config.mjs
new file mode 100644
index 000000000..96232cd32
--- /dev/null
+++ b/packages/knip/fixtures/plugins/hey-api/openapi-ts.config.mjs
@@ -0,0 +1,6 @@
+/** @type {import('@hey-api/openapi-ts').UserConfig} */
+export default {
+  input: 'https://get.heyapi.dev/hey-api/backend',
+  output: 'src/client',
+  plugins: ['@hey-api/client-fetch'],
+};
diff --git a/packages/knip/fixtures/plugins/hey-api/openapi-ts.config.ts b/packages/knip/fixtures/plugins/hey-api/openapi-ts.config.ts
new file mode 100644
index 000000000..fa45b34d9
--- /dev/null
+++ b/packages/knip/fixtures/plugins/hey-api/openapi-ts.config.ts
@@ -0,0 +1,14 @@
+import { defineConfig, defaultPlugins } from '@hey-api/openapi-ts';
+
+export default defineConfig({
+  input: 'https://get.heyapi.dev/hey-api/backend',
+  output: 'src/client',
+  plugins: [
+    ...defaultPlugins,
+    '@hey-api/client-fetch',
+    {
+      name: 'custom-plugin',
+      _dependencies: ['@hey-api/typescript'],
+    },
+  ],
+});
diff --git a/packages/knip/fixtures/plugins/hey-api/package.json b/packages/knip/fixtures/plugins/hey-api/package.json
new file mode 100644
index 000000000..a7ccc1aba
--- /dev/null
+++ b/packages/knip/fixtures/plugins/hey-api/package.json
@@ -0,0 +1,8 @@
+{
+  "name": "@plugins/hey-api",
+  "dependencies": {
+    "@hey-api/openapi-ts": "*",
+    "@hey-api/client-fetch": "*",
+    "@hey-api/typescript": "*"
+  }
+}
diff --git a/packages/knip/fixtures/plugins/hey-api/src/client/sdk.gen.ts b/packages/knip/fixtures/plugins/hey-api/src/client/sdk.gen.ts
new file mode 100644
index 000000000..ddafa8112
--- /dev/null
+++ b/packages/knip/fixtures/plugins/hey-api/src/client/sdk.gen.ts
@@ -0,0 +1 @@
+export const getData = () => 0;
diff --git a/packages/knip/fixtures/plugins/hey-api/src/client2/sdk.gen.ts b/packages/knip/fixtures/plugins/hey-api/src/client2/sdk.gen.ts
new file mode 100644
index 000000000..ddafa8112
--- /dev/null
+++ b/packages/knip/fixtures/plugins/hey-api/src/client2/sdk.gen.ts
@@ -0,0 +1 @@
+export const getData = () => 0;
diff --git a/packages/knip/schema.json b/packages/knip/schema.json
index bffa709e1..5fbac9d98 100644
--- a/packages/knip/schema.json
+++ b/packages/knip/schema.json
@@ -419,6 +419,10 @@
           "title": "hardhat plugin configuration (https://knip.dev/reference/plugins/hardhat)",
           "$ref": "#/definitions/plugin"
         },
+        "hey-api": {
+          "title": "hey-api plugin configuration (https://knip.dev/reference/plugins/hey-api)",
+          "$ref": "#/definitions/plugin"
+        },
         "husky": {
           "title": "husky plugin configuration (https://knip.dev/reference/plugins/husky)",
           "$ref": "#/definitions/plugin"
diff --git a/packages/knip/src/plugins/hey-api/index.ts b/packages/knip/src/plugins/hey-api/index.ts
new file mode 100644
index 000000000..da22c483f
--- /dev/null
+++ b/packages/knip/src/plugins/hey-api/index.ts
@@ -0,0 +1,36 @@
+import type { IsPluginEnabled, Plugin, ResolveConfig } from '../../types/config.js';
+import { type Input, toDependency, toEntry, toIgnore } from '../../util/input.js';
+import { hasDependency } from '../../util/plugin.js';
+import type { PluginConfig } from './types.js';
+
+// https://heyapi.dev/openapi-ts/get-started
+
+const title = 'Hey API';
+
+const enablers = ['@hey-api/openapi-ts'];
+
+const isEnabled: IsPluginEnabled = ({ dependencies }) => hasDependency(dependencies, enablers);
+
+const config: string[] = ['openapi-ts.config.@(js|ts|cjs|mjs)'];
+
+const resolveConfig: ResolveConfig<PluginConfig> = async ({ plugins = [], output }): Promise<Input[]> => {
+  const defaultPlugins = ['@hey-api/typescript', '@hey-api/sdk'];
+  const pluginNames = plugins.reduce<string[]>((acc, p) => {
+    const add = typeof p === 'string' ? [p] : (p._dependencies ?? []);
+    return acc.concat(add);
+  }, []);
+  const pluginInputs = pluginNames.map(name =>
+    defaultPlugins.includes(name) ? toIgnore(name, 'unlisted') : toDependency(name)
+  );
+  const outPath = typeof output === 'string' ? output : output.path;
+  const entries = outPath ? [toEntry(`./${outPath}/**`)] : [];
+  return [...pluginInputs, ...entries];
+};
+
+export default {
+  title,
+  enablers,
+  isEnabled,
+  config,
+  resolveConfig,
+} satisfies Plugin;
diff --git a/packages/knip/src/plugins/hey-api/types.ts b/packages/knip/src/plugins/hey-api/types.ts
new file mode 100644
index 000000000..94a5db039
--- /dev/null
+++ b/packages/knip/src/plugins/hey-api/types.ts
@@ -0,0 +1,4 @@
+export type PluginConfig = {
+  output: string | { path: string };
+  plugins?: (string | { name: string; _dependencies?: string[] })[];
+};
diff --git a/packages/knip/src/plugins/index.ts b/packages/knip/src/plugins/index.ts
index b2379326e..795d6ebd2 100644
--- a/packages/knip/src/plugins/index.ts
+++ b/packages/knip/src/plugins/index.ts
@@ -30,6 +30,7 @@ import { default as githubActions } from './github-actions/index.js';
 import { default as glob } from './glob/index.js';
 import { default as graphqlCodegen } from './graphql-codegen/index.js';
 import { default as hardhat } from './hardhat/index.js';
+import { default as heyApi } from './hey-api/index.js';
 import { default as husky } from './husky/index.js';
 import { default as i18nextParser } from './i18next-parser/index.js';
 import { default as jest } from './jest/index.js';
@@ -141,6 +142,7 @@ export const Plugins = {
   glob,
   'graphql-codegen': graphqlCodegen,
   hardhat,
+  'hey-api': heyApi,
   husky,
   'i18next-parser': i18nextParser,
   jest,
diff --git a/packages/knip/src/schema/plugins.ts b/packages/knip/src/schema/plugins.ts
index e79a5e7c3..a61380e27 100644
--- a/packages/knip/src/schema/plugins.ts
+++ b/packages/knip/src/schema/plugins.ts
@@ -44,6 +44,7 @@ export const pluginsSchema = z.object({
   glob: pluginSchema,
   'graphql-codegen': pluginSchema,
   hardhat: pluginSchema,
+  'hey-api': pluginSchema,
   husky: pluginSchema,
   'i18next-parser': pluginSchema,
   jest: pluginSchema,
diff --git a/packages/knip/src/types/PluginNames.ts b/packages/knip/src/types/PluginNames.ts
index ee45e4b84..22ae6a270 100644
--- a/packages/knip/src/types/PluginNames.ts
+++ b/packages/knip/src/types/PluginNames.ts
@@ -31,6 +31,7 @@ export type PluginName =
   | 'glob'
   | 'graphql-codegen'
   | 'hardhat'
+  | 'hey-api'
   | 'husky'
   | 'i18next-parser'
   | 'jest'
@@ -142,6 +143,7 @@ export const pluginNames = [
   'glob',
   'graphql-codegen',
   'hardhat',
+  'hey-api',
   'husky',
   'i18next-parser',
   'jest',
diff --git a/packages/knip/test/plugins/hey-api.test.ts b/packages/knip/test/plugins/hey-api.test.ts
new file mode 100644
index 000000000..882e0fcaa
--- /dev/null
+++ b/packages/knip/test/plugins/hey-api.test.ts
@@ -0,0 +1,21 @@
+import { test } from 'bun:test';
+import assert from 'node:assert/strict';
+import { main } from '../../src/index.js';
+import { resolve } from '../../src/util/path.js';
+import baseArguments from '../helpers/baseArguments.js';
+import baseCounters from '../helpers/baseCounters.js';
+
+const cwd = resolve('fixtures/plugins/hey-api');
+
+test('Find dependencies with the hey-api plugin', async () => {
+  const { counters } = await main({
+    ...baseArguments,
+    cwd,
+  });
+
+  assert.deepEqual(counters, {
+    ...baseCounters,
+    processed: 5,
+    total: 5,
+  });
+});