diff --git a/maintainers/maintainer-list.nix b/maintainers/maintainer-list.nix
index 29ceab883af8..b2cded239a7b 100644
--- a/maintainers/maintainer-list.nix
+++ b/maintainers/maintainer-list.nix
@@ -13576,6 +13576,15 @@
       fingerprint = "1248 D3E1 1D11 4A85 75C9  8934 6794 D45A 488C 2EDE";
     }];
   };
+  momeemt = {
+    name = "Mutsuha Asada";
+    email = "me@momee.mt";
+    github = "momeemt";
+    githubId = 43488453;
+    keys = [{
+      fingerprint = "D94F EA9F 5B08 F6A1 7B8F  EB8B ACB5 4F0C BC6A A7C6";
+    }];
+  };
   monaaraj = {
     name = "Mon Aaraj";
     email = "owo69uwu69@gmail.com";
diff --git a/pkgs/by-name/sp/spectral-language-server/package.json b/pkgs/by-name/sp/spectral-language-server/package.json
new file mode 100644
index 000000000000..1f3651349c62
--- /dev/null
+++ b/pkgs/by-name/sp/spectral-language-server/package.json
@@ -0,0 +1,159 @@
+{
+  "activationEvents": [
+    "onStartupFinished"
+  ],
+  "author": "Stoplight <support@stoplight.io>",
+  "bugs": {
+    "url": "https://github.com/stoplightio/vscode-spectral/issues"
+  },
+  "categories": [
+    "Linters"
+  ],
+  "contributes": {
+    "configuration": {
+      "properties": {
+        "spectral.enable": {
+          "default": true,
+          "description": "Controls whether or not Spectral is enabled.",
+          "scope": "resource",
+          "type": "boolean"
+        },
+        "spectral.rulesetFile": {
+          "description": "Location of the ruleset file to use when validating. If omitted, the default is a .spectral.yml/.spectral.json in the same folder as the document being validated. Paths are relative to the workspace. This can also be a remote HTTP url.",
+          "scope": "resource",
+          "type": "string"
+        },
+        "spectral.run": {
+          "default": "onType",
+          "description": "Run the linter on save (onSave) or as you type (onType).",
+          "enum": [
+            "onSave",
+            "onType"
+          ],
+          "scope": "resource",
+          "type": "string"
+        },
+        "spectral.trace.server": {
+          "default": "off",
+          "description": "Traces the communication between VS Code and the language server.",
+          "enum": [
+            "off",
+            "messages",
+            "verbose"
+          ],
+          "scope": "window",
+          "type": "string"
+        },
+        "spectral.validateFiles": {
+          "description": "An array of file globs (e.g., `**/*.yaml`) in minimatch glob format which should be validated by Spectral. If language identifiers are also specified, the file must match both in order to be validated. You can also use negative file globs (e.g., `!**/package.json`) here to exclude files.",
+          "items": {
+            "type": "string"
+          },
+          "scope": "resource",
+          "type": "array"
+        },
+        "spectral.validateLanguages": {
+          "default": [
+            "json",
+            "yaml"
+          ],
+          "description": "An array of language IDs which should be validated by Spectral. If file globs are also specified, the file must match both in order to be validated.",
+          "items": {
+            "type": "string"
+          },
+          "scope": "resource",
+          "type": "array"
+        }
+      },
+      "title": "Spectral",
+      "type": "object"
+    },
+    "commands": [
+      {
+        "title": "Show Output Channel",
+        "category": "Spectral",
+        "command": "spectral.showOutputChannel"
+      }
+    ]
+  },
+  "description": "JSON/YAML linter with OpenAPI and custom ruleset support.",
+  "devDependencies": {
+    "@types/chai": "^4.3.1",
+    "@types/chai-jest-snapshot": "^1.3.6",
+    "@types/glob": "^7.2.0",
+    "@types/mocha": "^9.1.0",
+    "@types/node": "^18.11.18",
+    "@types/vscode": "^1.48.0",
+    "@typescript-eslint/eslint-plugin": "^4.33.0",
+    "@typescript-eslint/parser": "^4.1.0",
+    "chai": "^4.2.0",
+    "chai-jest-snapshot": "^2.0.0",
+    "copyfiles": "^2.4.1",
+    "cross-env": "^7.0.3",
+    "eslint": "^7.8.1",
+    "eslint-config-google": "^0.14.0",
+    "glob": "^8.0.3",
+    "http-test-servers": "^2.0.0",
+    "merge-options": "^3.0.0",
+    "mocha": "^8.1.3",
+    "rimraf": "^3.0.2",
+    "semver": "^7.3.2",
+    "shelljs": "^0.8.5",
+    "ts-loader": "^9.2.8",
+    "ts-node": "^8.10.2",
+    "typescript": "beta",
+    "vsce": "^1.103.1",
+    "vscode-test": "^1.5.0",
+    "webpack": "^5.72.0",
+    "webpack-cli": "^4.9.2"
+  },
+  "displayName": "Spectral",
+  "engines": {
+    "vscode": "^1.48.0",
+    "node": "^12.20 || >= 14.13"
+  },
+  "homepage": "https://github.com/stoplightio/vscode-spectral",
+  "icon": "icon.png",
+  "keywords": [
+    "linter",
+    "validator",
+    "OpenAPI",
+    "Swagger",
+    "API",
+    "style guide",
+    "API description",
+    "API specification",
+    "OAS",
+    "OAS2",
+    "OAS3",
+    "AsyncAPI",
+    "json",
+    "yaml"
+  ],
+  "license": "Apache-2.0",
+  "main": "./client/index.js",
+  "name": "spectral",
+  "private": true,
+  "publisher": "stoplight",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/stoplightio/vscode-spectral"
+  },
+  "scripts": {
+    "clean": "rimraf dist && rimraf \"{server,client}/dist\"",
+    "lint": "eslint --ext .ts,.js .",
+    "test": "mocha -r ts-node/register \"./+(client|server)/__tests__/unit/**/*.test.ts\"",
+    "test:e2e": "cross-env CI=true CHAI_JEST_SNAPSHOT_UPDATE_ALL=false ts-node ./client/src/__tests__/e2e/index.ts"
+  },
+  "version": "1.1.2",
+  "workspaces": {
+    "packages": [
+      "client",
+      "server"
+    ],
+    "nohoist": [
+      "client/**",
+      "server/**"
+    ]
+  }
+}
diff --git a/pkgs/by-name/sp/spectral-language-server/package.nix b/pkgs/by-name/sp/spectral-language-server/package.nix
new file mode 100644
index 000000000000..8193ff3acebd
--- /dev/null
+++ b/pkgs/by-name/sp/spectral-language-server/package.nix
@@ -0,0 +1,109 @@
+{ lib
+, buildNpmPackage
+, mkYarnPackage
+, fetchYarnDeps
+, fetchFromGitHub
+, typescript
+, jq
+, fetchpatch
+}:
+let
+  # Instead of the build script that spectral-language-server provides (ref: https://github.com/luizcorreia/spectral-language-server/blob/master/script/vscode-spectral-build.sh), we build vscode-spectral manually.
+  # This is because the script must go through the network and will not work under the Nix sandbox environment.
+  vscodeSpectral = mkYarnPackage rec {
+    pname = "vscode-spectral";
+    version = "1.1.2";
+
+    src = fetchFromGitHub {
+      owner = "stoplightio";
+      repo = "vscode-spectral";
+      rev = "v${version}";
+      hash = "sha256-TWy+bC6qhTKDY874ORTBbvCIH8ycpmBiU8GLYxBIiAs=";
+    };
+
+    packageJSON = ./package.json;
+
+    offlineCache = fetchYarnDeps {
+      yarnLock = src + "/yarn.lock";
+      hash = "sha256-am27A9VyFoXuOlgG9mnvNqV3Q7Bi7GJzDqqVFGDVWIA=";
+    };
+
+    nativeBuildInputs = [ typescript jq ];
+
+    postPatch = ''
+      cp server/tsconfig.json server/tsconfig.json.bak
+      jq '.compilerOptions += {"module": "NodeNext", "moduleResolution": "NodeNext"}' server/tsconfig.json.bak > server/tsconfig.json
+    '';
+
+    dontConfigure = true;
+
+    buildPhase = ''
+      runHook preBuild
+      # FIXME: vscode-spactral depends on @rollup/pluginutils, but it may have a bug that doesn't provide the type definitions for NodeNext module resolution. (ref: https://github.com/rollup/plugins/issues/1192)
+      # tsc detects some type errors in the code. However we ignore this because it's not a problem for the final build if server/dist is generated.
+      tsc -p server || true
+      test -d server/dist
+      runHook postBuild
+    '';
+
+    installPhase = ''
+      runHook preInstall
+      mkdir -p $out
+      cp -R server/dist $out
+      runHook postInstall
+    '';
+
+    doDist = false;
+
+    meta = with lib; {
+      homepage = "https://github.com/stoplightio/vscode-spectral";
+      description = "VS Code extension bringing the awesome Spectral JSON/YAML linter with OpenAPI/AsyncAPI support";
+      license = licenses.asl20;
+    };
+  };
+in
+buildNpmPackage rec {
+  pname = "spectral-language-server";
+  version = "1.0.8-unstable-2023-06-06";
+
+  src = fetchFromGitHub {
+    owner = "luizcorreia";
+    repo = "spectral-language-server";
+    rev = "c9a7752b08e6bba937ef4f5435902afd41b6957f";
+    hash = "sha256-VD2aAzlCnJ6mxPUSbNRfMOlslM8kLPqrAI2ah6sX9cU=";
+  };
+
+  npmDepsHash = "sha256-ixAXy/rRkyWL3jdAkrXJh1qhWcKIkr5nH/Bhu2JV6k8=";
+
+  patches = [
+    # https://github.com/luizcorreia/spectral-language-server/pull/15
+    (fetchpatch {
+      name = "fix-package-lock.patch";
+      url = "https://github.com/luizcorreia/spectral-language-server/commit/909704850dd10e7b328fc7d15f8b07cdef88899d.patch";
+      hash = "sha256-+mN93xP4HCll4dTcnh2W/m9k3XovvgnB6AOmuJpZUZ0=";
+    })
+  ];
+
+  dontNpmBuild = true;
+
+  npmFlags = [ "--ignore-scripts" ];
+
+  installPhase = ''
+    runHook preInstall
+    mkdir -p $out/bin
+    mkdir -p $out/node_modules
+    mkdir -p $out/dist/spectral-language-server
+    cp -R ${vscodeSpectral}/dist/* $out/dist/spectral-language-server/
+    cp ./bin/* $out/bin
+    cp -R ./node_modules/* $out/node_modules
+    runHook postInstall
+  '';
+
+  meta = with lib; {
+    homepage = "https://github.com/luizcorreia/spectral-language-server";
+    description = "Awesome Spectral JSON/YAML linter with OpenAPI/AsyncAPI support";
+    maintainers = with maintainers; [ momeemt ];
+    license = licenses.mit;
+    mainProgram = "spectral-language-server";
+  };
+}