diff --git a/.changes/api-remove-ts-files.md b/.changes/api-remove-ts-files.md
new file mode 100644
index 000000000..8497514e9
--- /dev/null
+++ b/.changes/api-remove-ts-files.md
@@ -0,0 +1,5 @@
+---
+"api": patch
+---
+
+Remove `.ts` files on the published package.
diff --git a/tooling/api/package.json b/tooling/api/package.json
index 07e68a911..52246b9f2 100644
--- a/tooling/api/package.json
+++ b/tooling/api/package.json
@@ -58,7 +58,6 @@
     "eslint-plugin-node": "11.1.0",
     "eslint-plugin-promise": "5.1.0",
     "eslint-plugin-security": "1.4.0",
-    "fs-extra": "10.0.0",
     "lockfile-lint": "4.6.2",
     "prettier": "2.4.1",
     "regenerator-runtime": "0.13.9",
diff --git a/tooling/api/scripts/after-build.cjs b/tooling/api/scripts/after-build.cjs
index 78bbe5afe..383bd15ad 100644
--- a/tooling/api/scripts/after-build.cjs
+++ b/tooling/api/scripts/after-build.cjs
@@ -3,7 +3,6 @@
 // SPDX-License-Identifier: MIT
 
 const { readFileSync, readdirSync, writeFileSync, copyFileSync } = require('fs')
-const { copySync } = require('fs-extra')
 
 // append our api modules to `exports` in `package.json` then write it to `./dist`
 const pkg = JSON.parse(readFileSync('package.json', 'utf8'))
@@ -42,6 +41,3 @@ const files = [
   ...dir.filter((f) => f.endsWith('.md'))
 ]
 files.forEach((f) => copyFileSync(f, `dist/${f}`))
-
-// copy typescript src files to `./dist`
-copySync('src', 'dist')
diff --git a/tooling/api/yarn.lock b/tooling/api/yarn.lock
index 691a44546..75648ce96 100644
--- a/tooling/api/yarn.lock
+++ b/tooling/api/yarn.lock
@@ -2312,15 +2312,6 @@ flatted@^3.1.0:
   resolved "https://registry.yarnpkg.com/flatted/-/flatted-3.1.1.tgz#c4b489e80096d9df1dfc97c79871aea7c617c469"
   integrity sha512-zAoAQiudy+r5SvnSw3KJy5os/oRJYHzrzja/tBDqrZtNhUw8bt6y8OBzMWcjWr+8liV8Eb6yOhw8WZ7VFZ5ZzA==
 
-fs-extra@10.0.0:
-  version "10.0.0"
-  resolved "https://registry.yarnpkg.com/fs-extra/-/fs-extra-10.0.0.tgz#9ff61b655dde53fb34a82df84bb214ce802e17c1"
-  integrity sha512-C5owb14u9eJwizKGdchcDUQeFtlSHHthBk8pbX9Vc1PFZrLombudjDnNns88aYslCyF6IY5SUw3Roz6xShcEIQ==
-  dependencies:
-    graceful-fs "^4.2.0"
-    jsonfile "^6.0.1"
-    universalify "^2.0.0"
-
 fs.realpath@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/fs.realpath/-/fs.realpath-1.0.0.tgz#1504ad2523158caa40db4a2787cb01411994ea4f"
@@ -2415,7 +2406,7 @@ globby@^11.0.1, globby@^11.0.3:
     merge2 "^1.3.0"
     slash "^3.0.0"
 
-graceful-fs@^4.1.2, graceful-fs@^4.1.6, graceful-fs@^4.2.0:
+graceful-fs@^4.1.2:
   version "4.2.6"
   resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.2.6.tgz#ff040b2b0853b23c3d31027523706f1885d76bee"
   integrity sha512-nTnJ528pbqxYanhpDYsi4Rd8MAeaBA67+RZ10CM1m3bTAVFEDcd5AuA4a6W5YkGZ1iNXHzZz8T6TBKLeBuNriQ==
@@ -2686,15 +2677,6 @@ jsonc-parser@^3.0.0:
   resolved "https://registry.yarnpkg.com/jsonc-parser/-/jsonc-parser-3.0.0.tgz#abdd785701c7e7eaca8a9ec8cf070ca51a745a22"
   integrity sha512-fQzRfAbIBnR0IQvftw9FJveWiHp72Fg20giDrHz6TdfB12UH/uue0D3hm57UB5KgAVuniLMCaS8P1IMj9NR7cA==
 
-jsonfile@^6.0.1:
-  version "6.1.0"
-  resolved "https://registry.yarnpkg.com/jsonfile/-/jsonfile-6.1.0.tgz#bc55b2634793c679ec6403094eb13698a6ec0aae"
-  integrity sha512-5dgndWOriYSm5cnYaJNhalLNDKOqFwyDB/rr1E9ZsGciGvKPs8R2xYGCacuf3z6K1YKDz182fd+fY3cn3pMqXQ==
-  dependencies:
-    universalify "^2.0.0"
-  optionalDependencies:
-    graceful-fs "^4.1.6"
-
 levn@^0.4.1:
   version "0.4.1"
   resolved "https://registry.yarnpkg.com/levn/-/levn-0.4.1.tgz#ae4562c007473b932a6200d403268dd2fffc6ade"
@@ -3598,11 +3580,6 @@ unicode-property-aliases-ecmascript@^1.0.4:
   resolved "https://registry.yarnpkg.com/unicode-property-aliases-ecmascript/-/unicode-property-aliases-ecmascript-1.1.0.tgz#dd57a99f6207bedff4628abefb94c50db941c8f4"
   integrity sha512-PqSoPh/pWetQ2phoj5RLiaqIk4kCNwoV3CI+LfGmWLKI3rE3kl1h59XpX2BjgDrmbxD9ARtQobPGU1SguCYuQg==
 
-universalify@^2.0.0:
-  version "2.0.0"
-  resolved "https://registry.yarnpkg.com/universalify/-/universalify-2.0.0.tgz#75a4984efedc4b08975c5aeb73f530d02df25717"
-  integrity sha512-hAZsKq7Yy11Zu1DE0OzWjw7nnLZmJZYTDZZyEFHZdUhV8FkH5MCfoU1XMaxXovpyW5nq5scPqq0ZDP9Zyl04oQ==
-
 uri-js@^4.2.2:
   version "4.4.1"
   resolved "https://registry.yarnpkg.com/uri-js/-/uri-js-4.4.1.tgz#9b1a52595225859e55f669d928f88c6c57f2a77e"