diff --git a/.validate/index.js b/.validate/index.js
index 47231abc..e151c84b 100644
--- a/.validate/index.js
+++ b/.validate/index.js
@@ -1,14 +1,11 @@
 const path = require('path');
 const fs = require('fs-extra');
 
-const { listDirectories, listFiles } = require('./utils');
+const { listDirectories, listFiles, signale } = require('./utils');
 const { rootDir } = require('./constants');
-const validate = {
-  js: require('./js'),
-};
+const validators = require('./validators');
 
 const categories = listDirectories(rootDir).filter(dir => dir !== 'node_modules');
-let hasError = false;
 for (const category of categories) {
   const categoryDir = path.resolve(rootDir, category);
   const algorithms = listDirectories(categoryDir);
@@ -17,16 +14,28 @@ for (const category of categories) {
     const files = listFiles(algorithmDir);
     for (const file of files) {
       const ext = file.split('.').pop();
-      const validator = validate[ext];
+      const validator = validators[ext];
       if (validator) {
+        const errors = [];
+        const error = message => errors.push(message);
+        const warns = [];
+        const warn = message => warns.push(message);
         const filePath = path.resolve(algorithmDir, file);
         const content = fs.readFileSync(filePath, 'utf-8');
-        if (!validator(category, algorithm, file, content)) {
-          hasError = true;
-        }
+        validator(error, warn, category, algorithm, file, content)
+          .then(() => {
+            if (errors.length || warns.length) {
+              signale.log(`${category}/${algorithm}/${file}`);
+              errors.forEach(error => signale.error(error));
+              warns.forEach(error => signale.warn(error));
+              signale.log();
+            }
+            if (errors.length) {
+              process.exitCode = 1;
+            }
+          })
+          .catch(console.error);
       }
     }
   }
 }
-
-process.exit(hasError ? 1 : 0);
diff --git a/.validate/js/index.js b/.validate/js/index.js
deleted file mode 100644
index bef9740d..00000000
--- a/.validate/js/index.js
+++ /dev/null
@@ -1,40 +0,0 @@
-const path = require('path');
-const { Commander } = require('algorithm-visualizer');
-const { rootDir } = require('../constants');
-const { signale } = require('../utils');
-const { MAX_STEPS } = require('../constants');
-
-module.exports = (category, algorithm, file, content) => {
-  const errors = [];
-  const error = message => errors.push(message);
-  const warns = [];
-  const warn = message => warns.push(message);
-
-  try {
-    Commander.init();
-    require(path.resolve(rootDir, category, algorithm, file));
-  } catch (e) {
-    error(e);
-  }
-  const steps = Commander.commands.filter(command => command.method === 'delay').length;
-  if (steps > MAX_STEPS) {
-    warn('Too many steps.');
-  }
-  if (!/\/\/ import visualization libraries {/.test(content)) {
-    error('Missing the code folding for importing visualization libraries.');
-  }
-  if (!/\/\/ define tracer variables {/.test(content)) {
-    error('Missing the code folding for defining tracer variables.');
-  }
-  if (!/\/\/ visualize {/.test(content)) {
-    error('Missing the code folding for visualizing.');
-  }
-
-  if (errors.length || warns.length) {
-    signale.log(`${category}/${algorithm}/${file}`);
-    warns.forEach(error => signale.warn(error));
-    errors.forEach(error => signale.error(error));
-    signale.log();
-  }
-  return errors.length === 0;
-};
diff --git a/.validate/validators/common.js b/.validate/validators/common.js
new file mode 100644
index 00000000..0391ecdc
--- /dev/null
+++ b/.validate/validators/common.js
@@ -0,0 +1,25 @@
+const { MAX_STEPS } = require('../constants');
+
+function ensureCodeFoldings(error, warn, content) {
+  if (!/\/\/ import visualization libraries {/.test(content)) {
+    error('Missing the code folding for importing visualization libraries.');
+  }
+  if (!/\/\/ define tracer variables {/.test(content)) {
+    error('Missing the code folding for defining tracer variables.');
+  }
+  if (!/\/\/ visualize {/.test(content)) {
+    error('Missing the code folding for visualizing.');
+  }
+}
+
+function ensureMaxSteps(error, warn, commands) {
+  const steps = commands.filter(command => command.method === 'delay').length;
+  if (steps > MAX_STEPS) {
+    warn('Too many steps.');
+  }
+}
+
+module.exports = {
+  ensureCodeFoldings,
+  ensureMaxSteps,
+};
diff --git a/.validate/validators/index.js b/.validate/validators/index.js
new file mode 100644
index 00000000..c60fcaf1
--- /dev/null
+++ b/.validate/validators/index.js
@@ -0,0 +1,7 @@
+const js = require('./js');
+const java = require('./java');
+
+module.exports = {
+  js,
+  java,
+};
diff --git a/.validate/validators/java.js b/.validate/validators/java.js
new file mode 100644
index 00000000..3285409f
--- /dev/null
+++ b/.validate/validators/java.js
@@ -0,0 +1,18 @@
+const rp = require('request-promise');
+const { ensureMaxSteps, ensureCodeFoldings } = require('./common');
+
+module.exports = async (error, warn, category, algorithm, file, content) => {
+  try {
+    // TODO: Cache the response and restore if sha of the content matches
+    const commands = await rp({
+      method: 'POST',
+      uri: 'https://algorithm-visualizer.org/api/tracers/java',
+      form: { code: content },
+      json: true,
+    });
+    ensureMaxSteps(error, warn, commands);
+  } catch (e) {
+    error(e);
+  }
+  ensureCodeFoldings(error, warn, content);
+};
diff --git a/.validate/validators/js.js b/.validate/validators/js.js
new file mode 100644
index 00000000..dc35d1ea
--- /dev/null
+++ b/.validate/validators/js.js
@@ -0,0 +1,17 @@
+process.env.ALGORITHM_VISUALIZER = '1';
+
+const path = require('path');
+const { ensureMaxSteps, ensureCodeFoldings } = require('./common');
+const { Commander } = require('algorithm-visualizer');
+const { rootDir } = require('../constants');
+
+module.exports = async (error, warn, category, algorithm, file, content) => {
+  try {
+    Commander.init();
+    require(path.resolve(rootDir, category, algorithm, file));
+    ensureMaxSteps(error, warn, Commander.commands);
+  } catch (e) {
+    error(e);
+  }
+  ensureCodeFoldings(error, warn, content);
+};
diff --git a/package-lock.json b/package-lock.json
index da6ea512..3572dcc4 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,9 +1,20 @@
 {
-  "name": "algorithms-validator",
+  "name": "algorithms",
   "version": "1.0.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
+    "ajv": {
+      "version": "6.10.0",
+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.10.0.tgz",
+      "integrity": "sha512-nffhOpkymDECQyR0mnsUtoCE8RlX38G0rYP+wgLWFyZuUyuuojSSvi/+euOiQBIn63whYwYVIIH1TvE3tu4OEg==",
+      "requires": {
+        "fast-deep-equal": "^2.0.1",
+        "fast-json-stable-stringify": "^2.0.0",
+        "json-schema-traverse": "^0.4.1",
+        "uri-js": "^4.2.2"
+      }
+    },
     "algorithm-visualizer": {
       "version": "2.3.5",
       "resolved": "https://registry.npmjs.org/algorithm-visualizer/-/algorithm-visualizer-2.3.5.tgz",
@@ -21,6 +32,34 @@
         "color-convert": "^1.9.0"
       }
     },
+    "asn1": {
+      "version": "0.2.4",
+      "resolved": "https://registry.npmjs.org/asn1/-/asn1-0.2.4.tgz",
+      "integrity": "sha512-jxwzQpLQjSmWXgwaCZE9Nz+glAG01yF1QnWgbhGwHI5A6FRIEY6IVqtHhIepHqI7/kyEyQEagBC5mBEFlIYvdg==",
+      "requires": {
+        "safer-buffer": "~2.1.0"
+      }
+    },
+    "assert-plus": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/assert-plus/-/assert-plus-1.0.0.tgz",
+      "integrity": "sha1-8S4PPF13sLHN2RRpQuTpbB5N1SU="
+    },
+    "asynckit": {
+      "version": "0.4.0",
+      "resolved": "https://registry.npmjs.org/asynckit/-/asynckit-0.4.0.tgz",
+      "integrity": "sha1-x57Zf380y48robyXkLzDZkdLS3k="
+    },
+    "aws-sign2": {
+      "version": "0.7.0",
+      "resolved": "https://registry.npmjs.org/aws-sign2/-/aws-sign2-0.7.0.tgz",
+      "integrity": "sha1-tG6JCTSpWR8tL2+G1+ap8bP+dqg="
+    },
+    "aws4": {
+      "version": "1.8.0",
+      "resolved": "https://registry.npmjs.org/aws4/-/aws4-1.8.0.tgz",
+      "integrity": "sha512-ReZxvNHIOv88FlT7rxcXIIC0fPt4KZqZbOlivyWtXLt8ESx84zd3kMC6iK5jVeS2qt+g7ftS7ye4fi06X5rtRQ=="
+    },
     "axios": {
       "version": "0.18.1",
       "resolved": "https://registry.npmjs.org/axios/-/axios-0.18.1.tgz",
@@ -30,6 +69,24 @@
         "is-buffer": "^2.0.2"
       }
     },
+    "bcrypt-pbkdf": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/bcrypt-pbkdf/-/bcrypt-pbkdf-1.0.2.tgz",
+      "integrity": "sha1-pDAdOJtqQ/m2f/PKEaP2Y342Dp4=",
+      "requires": {
+        "tweetnacl": "^0.14.3"
+      }
+    },
+    "bluebird": {
+      "version": "3.5.5",
+      "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.5.5.tgz",
+      "integrity": "sha512-5am6HnnfN+urzt4yfg7IgTbotDjIT/u8AJpEt0sIU9FtXfVeezXAPKswrG+xKUCOYAINpSdgZVDU6QFh+cuH3w=="
+    },
+    "caseless": {
+      "version": "0.12.0",
+      "resolved": "https://registry.npmjs.org/caseless/-/caseless-0.12.0.tgz",
+      "integrity": "sha1-G2gcIf+EAzyCZUMJBolCDRhxUdw="
+    },
     "chalk": {
       "version": "2.4.2",
       "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
@@ -53,6 +110,27 @@
       "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.3.tgz",
       "integrity": "sha1-p9BVi9icQveV3UIyj3QIMcpTvCU="
     },
+    "combined-stream": {
+      "version": "1.0.8",
+      "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.8.tgz",
+      "integrity": "sha512-FQN4MRfuJeHf7cBbBMJFXhKSDq+2kAArBlmRBvcvFE5BB1HZKXtSFASDhdlz9zOYwxh8lDdnvmMOe/+5cdoEdg==",
+      "requires": {
+        "delayed-stream": "~1.0.0"
+      }
+    },
+    "core-util-is": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.2.tgz",
+      "integrity": "sha1-tf1UIgqivFq1eqtxQMlAdUUDwac="
+    },
+    "dashdash": {
+      "version": "1.14.1",
+      "resolved": "https://registry.npmjs.org/dashdash/-/dashdash-1.14.1.tgz",
+      "integrity": "sha1-hTz6D3y+L+1d4gMmuN1YEDX24vA=",
+      "requires": {
+        "assert-plus": "^1.0.0"
+      }
+    },
     "debug": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/debug/-/debug-3.1.0.tgz",
@@ -61,6 +139,20 @@
         "ms": "2.0.0"
       }
     },
+    "delayed-stream": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/delayed-stream/-/delayed-stream-1.0.0.tgz",
+      "integrity": "sha1-3zrhmayt+31ECqrgsp4icrJOxhk="
+    },
+    "ecc-jsbn": {
+      "version": "0.1.2",
+      "resolved": "https://registry.npmjs.org/ecc-jsbn/-/ecc-jsbn-0.1.2.tgz",
+      "integrity": "sha1-OoOpBOVDUyh4dMVkt1SThoSamMk=",
+      "requires": {
+        "jsbn": "~0.1.0",
+        "safer-buffer": "^2.1.0"
+      }
+    },
     "error-ex": {
       "version": "1.3.2",
       "resolved": "https://registry.npmjs.org/error-ex/-/error-ex-1.3.2.tgz",
@@ -74,6 +166,26 @@
       "resolved": "https://registry.npmjs.org/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz",
       "integrity": "sha1-G2HAViGQqN/2rjuyzwIAyhMLhtQ="
     },
+    "extend": {
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/extend/-/extend-3.0.2.tgz",
+      "integrity": "sha512-fjquC59cD7CyW6urNXK0FBufkZcoiGG80wTuPujX590cB5Ttln20E2UB4S/WARVqhXffZl2LNgS+gQdPIIim/g=="
+    },
+    "extsprintf": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/extsprintf/-/extsprintf-1.3.0.tgz",
+      "integrity": "sha1-lpGEQOMEGnpBT4xS48V06zw+HgU="
+    },
+    "fast-deep-equal": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/fast-deep-equal/-/fast-deep-equal-2.0.1.tgz",
+      "integrity": "sha1-ewUhjd+WZ79/Nwv3/bLLFf3Qqkk="
+    },
+    "fast-json-stable-stringify": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/fast-json-stable-stringify/-/fast-json-stable-stringify-2.0.0.tgz",
+      "integrity": "sha1-1RQsDK7msRifh9OnYREGT4bIu/I="
+    },
     "figures": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/figures/-/figures-2.0.0.tgz",
@@ -98,6 +210,21 @@
         "debug": "=3.1.0"
       }
     },
+    "forever-agent": {
+      "version": "0.6.1",
+      "resolved": "https://registry.npmjs.org/forever-agent/-/forever-agent-0.6.1.tgz",
+      "integrity": "sha1-+8cfDEGt6zf5bFd60e1C2P2sypE="
+    },
+    "form-data": {
+      "version": "2.3.3",
+      "resolved": "https://registry.npmjs.org/form-data/-/form-data-2.3.3.tgz",
+      "integrity": "sha512-1lLKB2Mu3aGP1Q/2eCOx0fNbRMe7XdwktwOruhfqqd0rIJWwN4Dh+E3hrPSlDCXnSR7UtZ1N38rVXm+6+MEhJQ==",
+      "requires": {
+        "asynckit": "^0.4.0",
+        "combined-stream": "^1.0.6",
+        "mime-types": "^2.1.12"
+      }
+    },
     "fs-extra": {
       "version": "8.0.1",
       "resolved": "https://registry.npmjs.org/fs-extra/-/fs-extra-8.0.1.tgz",
@@ -108,16 +235,48 @@
         "universalify": "^0.1.0"
       }
     },
+    "getpass": {
+      "version": "0.1.7",
+      "resolved": "https://registry.npmjs.org/getpass/-/getpass-0.1.7.tgz",
+      "integrity": "sha1-Xv+OPmhNVprkyysSgmBOi6YhSfo=",
+      "requires": {
+        "assert-plus": "^1.0.0"
+      }
+    },
     "graceful-fs": {
       "version": "4.1.15",
       "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.1.15.tgz",
       "integrity": "sha512-6uHUhOPEBgQ24HM+r6b/QwWfZq+yiFcipKFrOFiBEnWdy5sdzYoi+pJeQaPI5qOLRFqWmAXUPQNsielzdLoecA=="
     },
+    "har-schema": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/har-schema/-/har-schema-2.0.0.tgz",
+      "integrity": "sha1-qUwiJOvKwEeCoNkDVSHyRzW37JI="
+    },
+    "har-validator": {
+      "version": "5.1.3",
+      "resolved": "https://registry.npmjs.org/har-validator/-/har-validator-5.1.3.tgz",
+      "integrity": "sha512-sNvOCzEQNr/qrvJgc3UG/kD4QtlHycrzwS+6mfTrrSq97BvaYcPZZI1ZSqGSPR73Cxn4LKTD4PttRwfU7jWq5g==",
+      "requires": {
+        "ajv": "^6.5.5",
+        "har-schema": "^2.0.0"
+      }
+    },
     "has-flag": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-3.0.0.tgz",
       "integrity": "sha1-tdRU3CGZriJWmfNGfloH87lVuv0="
     },
+    "http-signature": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/http-signature/-/http-signature-1.2.0.tgz",
+      "integrity": "sha1-muzZJRFHcvPZW2WmCruPfBj7rOE=",
+      "requires": {
+        "assert-plus": "^1.0.0",
+        "jsprim": "^1.2.2",
+        "sshpk": "^1.7.0"
+      }
+    },
     "is-arrayish": {
       "version": "0.2.1",
       "resolved": "https://registry.npmjs.org/is-arrayish/-/is-arrayish-0.2.1.tgz",
@@ -128,16 +287,46 @@
       "resolved": "https://registry.npmjs.org/is-buffer/-/is-buffer-2.0.3.tgz",
       "integrity": "sha512-U15Q7MXTuZlrbymiz95PJpZxu8IlipAp4dtS3wOdgPXx3mqBnslrWU14kxfHB+Py/+2PVKSr37dMAgM2A4uArw=="
     },
+    "is-typedarray": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/is-typedarray/-/is-typedarray-1.0.0.tgz",
+      "integrity": "sha1-5HnICFjfDBsR3dppQPlgEfzaSpo="
+    },
     "is-wsl": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/is-wsl/-/is-wsl-1.1.0.tgz",
       "integrity": "sha1-HxbkqiKwTRM2tmGIpmrzxgDDpm0="
     },
+    "isstream": {
+      "version": "0.1.2",
+      "resolved": "https://registry.npmjs.org/isstream/-/isstream-0.1.2.tgz",
+      "integrity": "sha1-R+Y/evVa+m+S4VAOaQ64uFKcCZo="
+    },
+    "jsbn": {
+      "version": "0.1.1",
+      "resolved": "https://registry.npmjs.org/jsbn/-/jsbn-0.1.1.tgz",
+      "integrity": "sha1-peZUwuWi3rXyAdls77yoDA7y9RM="
+    },
     "json-parse-better-errors": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/json-parse-better-errors/-/json-parse-better-errors-1.0.2.tgz",
       "integrity": "sha512-mrqyZKfX5EhL7hvqcV6WG1yYjnjeuYDzDhhcAAUrq8Po85NBQBJP+ZDUT75qZQ98IkUoBqdkExkukOU7Ts2wrw=="
     },
+    "json-schema": {
+      "version": "0.2.3",
+      "resolved": "https://registry.npmjs.org/json-schema/-/json-schema-0.2.3.tgz",
+      "integrity": "sha1-tIDIkuWaLwWVTOcnvT8qTogvnhM="
+    },
+    "json-schema-traverse": {
+      "version": "0.4.1",
+      "resolved": "https://registry.npmjs.org/json-schema-traverse/-/json-schema-traverse-0.4.1.tgz",
+      "integrity": "sha512-xbbCH5dCYU5T8LcEhhuh7HJ88HXuW3qsI3Y0zOZFKfZEHcpWiHU/Jxzk629Brsab/mMiHQti9wMP+845RPe3Vg=="
+    },
+    "json-stringify-safe": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/json-stringify-safe/-/json-stringify-safe-5.0.1.tgz",
+      "integrity": "sha1-Epai1Y/UXxmg9s4B1lcB4sc1tus="
+    },
     "jsonfile": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/jsonfile/-/jsonfile-4.0.0.tgz",
@@ -146,6 +335,17 @@
         "graceful-fs": "^4.1.6"
       }
     },
+    "jsprim": {
+      "version": "1.4.1",
+      "resolved": "https://registry.npmjs.org/jsprim/-/jsprim-1.4.1.tgz",
+      "integrity": "sha1-MT5mvB5cwG5Di8G3SZwuXFastqI=",
+      "requires": {
+        "assert-plus": "1.0.0",
+        "extsprintf": "1.3.0",
+        "json-schema": "0.2.3",
+        "verror": "1.10.0"
+      }
+    },
     "load-json-file": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/load-json-file/-/load-json-file-4.0.0.tgz",
@@ -166,11 +366,34 @@
         "path-exists": "^3.0.0"
       }
     },
+    "lodash": {
+      "version": "4.17.11",
+      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.11.tgz",
+      "integrity": "sha512-cQKh8igo5QUhZ7lg38DYWAxMvjSAKG0A8wGSVimP07SIUEK2UO+arSRKbRZWtelMtN5V0Hkwh5ryOto/SshYIg=="
+    },
+    "mime-db": {
+      "version": "1.40.0",
+      "resolved": "https://registry.npmjs.org/mime-db/-/mime-db-1.40.0.tgz",
+      "integrity": "sha512-jYdeOMPy9vnxEqFRRo6ZvTZ8d9oPb+k18PKoYNYUe2stVEBPPwsln/qWzdbmaIvnhZ9v2P+CuecK+fpUfsV2mA=="
+    },
+    "mime-types": {
+      "version": "2.1.24",
+      "resolved": "https://registry.npmjs.org/mime-types/-/mime-types-2.1.24.tgz",
+      "integrity": "sha512-WaFHS3MCl5fapm3oLxU4eYDw77IQM2ACcxQ9RIxfaC3ooc6PFuBMGZZsYpvoXS5D5QTWPieo1jjLdAm3TBP3cQ==",
+      "requires": {
+        "mime-db": "1.40.0"
+      }
+    },
     "ms": {
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       "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
       "integrity": "sha1-VgiurfwAvmwpAd9fmGF4jeDVl8g="
     },
+    "oauth-sign": {
+      "version": "0.9.0",
+      "resolved": "https://registry.npmjs.org/oauth-sign/-/oauth-sign-0.9.0.tgz",
+      "integrity": "sha512-fexhUFFPTGV8ybAtSIGbV6gOkSv8UtRbDBnAyLQw4QPKkgNlsH2ByPGtMUqdWkos6YCRmAqViwgZrJc/mRDzZQ=="
+    },
     "opn": {
       "version": "5.5.0",
       "resolved": "https://registry.npmjs.org/opn/-/opn-5.5.0.tgz",
@@ -214,6 +437,11 @@
       "resolved": "https://registry.npmjs.org/path-exists/-/path-exists-3.0.0.tgz",
       "integrity": "sha1-zg6+ql94yxiSXqfYENe1mwEP1RU="
     },
+    "performance-now": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/performance-now/-/performance-now-2.1.0.tgz",
+      "integrity": "sha1-Ywn04OX6kT7BxpMHrjZLSzd8nns="
+    },
     "pify": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/pify/-/pify-3.0.0.tgz",
@@ -228,6 +456,77 @@
         "load-json-file": "^4.0.0"
       }
     },
+    "psl": {
+      "version": "1.1.32",
+      "resolved": "https://registry.npmjs.org/psl/-/psl-1.1.32.tgz",
+      "integrity": "sha512-MHACAkHpihU/REGGPLj4sEfc/XKW2bheigvHO1dUqjaKigMp1C8+WLQYRGgeKFMsw5PMfegZcaN8IDXK/cD0+g=="
+    },
+    "punycode": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/punycode/-/punycode-2.1.1.tgz",
+      "integrity": "sha512-XRsRjdf+j5ml+y/6GKHPZbrF/8p2Yga0JPtdqTIY2Xe5ohJPD9saDJJLPvp9+NSBprVvevdXZybnj2cv8OEd0A=="
+    },
+    "qs": {
+      "version": "6.5.2",
+      "resolved": "https://registry.npmjs.org/qs/-/qs-6.5.2.tgz",
+      "integrity": "sha512-N5ZAX4/LxJmF+7wN74pUD6qAh9/wnvdQcjq9TZjevvXzSUo7bfmw91saqMjzGS2xq91/odN2dW/WOl7qQHNDGA=="
+    },
+    "request": {
+      "version": "2.88.0",
+      "resolved": "https://registry.npmjs.org/request/-/request-2.88.0.tgz",
+      "integrity": "sha512-NAqBSrijGLZdM0WZNsInLJpkJokL72XYjUpnB0iwsRgxh7dB6COrHnTBNwN0E+lHDAJzu7kLAkDeY08z2/A0hg==",
+      "requires": {
+        "aws-sign2": "~0.7.0",
+        "aws4": "^1.8.0",
+        "caseless": "~0.12.0",
+        "combined-stream": "~1.0.6",
+        "extend": "~3.0.2",
+        "forever-agent": "~0.6.1",
+        "form-data": "~2.3.2",
+        "har-validator": "~5.1.0",
+        "http-signature": "~1.2.0",
+        "is-typedarray": "~1.0.0",
+        "isstream": "~0.1.2",
+        "json-stringify-safe": "~5.0.1",
+        "mime-types": "~2.1.19",
+        "oauth-sign": "~0.9.0",
+        "performance-now": "^2.1.0",
+        "qs": "~6.5.2",
+        "safe-buffer": "^5.1.2",
+        "tough-cookie": "~2.4.3",
+        "tunnel-agent": "^0.6.0",
+        "uuid": "^3.3.2"
+      }
+    },
+    "request-promise": {
+      "version": "4.2.4",
+      "resolved": "https://registry.npmjs.org/request-promise/-/request-promise-4.2.4.tgz",
+      "integrity": "sha512-8wgMrvE546PzbR5WbYxUQogUnUDfM0S7QIFZMID+J73vdFARkFy+HElj4T+MWYhpXwlLp0EQ8Zoj8xUA0he4Vg==",
+      "requires": {
+        "bluebird": "^3.5.0",
+        "request-promise-core": "1.1.2",
+        "stealthy-require": "^1.1.1",
+        "tough-cookie": "^2.3.3"
+      }
+    },
+    "request-promise-core": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/request-promise-core/-/request-promise-core-1.1.2.tgz",
+      "integrity": "sha512-UHYyq1MO8GsefGEt7EprS8UrXsm1TxEvFUX1IMTuSLU2Rh7fTIdFtl8xD7JiEYiWU2dl+NYAjCTksTehQUxPag==",
+      "requires": {
+        "lodash": "^4.17.11"
+      }
+    },
+    "safe-buffer": {
+      "version": "5.1.2",
+      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
+      "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g=="
+    },
+    "safer-buffer": {
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/safer-buffer/-/safer-buffer-2.1.2.tgz",
+      "integrity": "sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg=="
+    },
     "signale": {
       "version": "1.4.0",
       "resolved": "https://registry.npmjs.org/signale/-/signale-1.4.0.tgz",
@@ -238,6 +537,27 @@
         "pkg-conf": "^2.1.0"
       }
     },
+    "sshpk": {
+      "version": "1.16.1",
+      "resolved": "https://registry.npmjs.org/sshpk/-/sshpk-1.16.1.tgz",
+      "integrity": "sha512-HXXqVUq7+pcKeLqqZj6mHFUMvXtOJt1uoUx09pFW6011inTMxqI8BA8PM95myrIyyKwdnzjdFjLiE6KBPVtJIg==",
+      "requires": {
+        "asn1": "~0.2.3",
+        "assert-plus": "^1.0.0",
+        "bcrypt-pbkdf": "^1.0.0",
+        "dashdash": "^1.12.0",
+        "ecc-jsbn": "~0.1.1",
+        "getpass": "^0.1.1",
+        "jsbn": "~0.1.0",
+        "safer-buffer": "^2.0.2",
+        "tweetnacl": "~0.14.0"
+      }
+    },
+    "stealthy-require": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/stealthy-require/-/stealthy-require-1.1.1.tgz",
+      "integrity": "sha1-NbCYdbT/SfJqd35QmzCQoyJr8ks="
+    },
     "strip-bom": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/strip-bom/-/strip-bom-3.0.0.tgz",
@@ -251,10 +571,62 @@
         "has-flag": "^3.0.0"
       }
     },
+    "tough-cookie": {
+      "version": "2.4.3",
+      "resolved": "https://registry.npmjs.org/tough-cookie/-/tough-cookie-2.4.3.tgz",
+      "integrity": "sha512-Q5srk/4vDM54WJsJio3XNn6K2sCG+CQ8G5Wz6bZhRZoAe/+TxjWB/GlFAnYEbkYVlON9FMk/fE3h2RLpPXo4lQ==",
+      "requires": {
+        "psl": "^1.1.24",
+        "punycode": "^1.4.1"
+      },
+      "dependencies": {
+        "punycode": {
+          "version": "1.4.1",
+          "resolved": "https://registry.npmjs.org/punycode/-/punycode-1.4.1.tgz",
+          "integrity": "sha1-wNWmOycYgArY4esPpSachN1BhF4="
+        }
+      }
+    },
+    "tunnel-agent": {
+      "version": "0.6.0",
+      "resolved": "https://registry.npmjs.org/tunnel-agent/-/tunnel-agent-0.6.0.tgz",
+      "integrity": "sha1-J6XeoGs2sEoKmWZ3SykIaPD8QP0=",
+      "requires": {
+        "safe-buffer": "^5.0.1"
+      }
+    },
+    "tweetnacl": {
+      "version": "0.14.5",
+      "resolved": "https://registry.npmjs.org/tweetnacl/-/tweetnacl-0.14.5.tgz",
+      "integrity": "sha1-WuaBd/GS1EViadEIr6k/+HQ/T2Q="
+    },
     "universalify": {
       "version": "0.1.2",
       "resolved": "https://registry.npmjs.org/universalify/-/universalify-0.1.2.tgz",
       "integrity": "sha512-rBJeI5CXAlmy1pV+617WB9J63U6XcazHHF2f2dbJix4XzpUF0RS3Zbj0FGIOCAva5P/d/GBOYaACQ1w+0azUkg=="
+    },
+    "uri-js": {
+      "version": "4.2.2",
+      "resolved": "https://registry.npmjs.org/uri-js/-/uri-js-4.2.2.tgz",
+      "integrity": "sha512-KY9Frmirql91X2Qgjry0Wd4Y+YTdrdZheS8TFwvkbLWf/G5KNJDCh6pKL5OZctEW4+0Baa5idK2ZQuELRwPznQ==",
+      "requires": {
+        "punycode": "^2.1.0"
+      }
+    },
+    "uuid": {
+      "version": "3.3.2",
+      "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.3.2.tgz",
+      "integrity": "sha512-yXJmeNaw3DnnKAOKJE51sL/ZaYfWJRl1pK9dr19YFCu0ObS231AB1/LbqTKRAQ5kw8A90rA6fr4riOUpTZvQZA=="
+    },
+    "verror": {
+      "version": "1.10.0",
+      "resolved": "https://registry.npmjs.org/verror/-/verror-1.10.0.tgz",
+      "integrity": "sha1-OhBcoXBTr1XW4nDB+CiGguGNpAA=",
+      "requires": {
+        "assert-plus": "^1.0.0",
+        "core-util-is": "1.0.2",
+        "extsprintf": "^1.2.0"
+      }
     }
   }
 }
diff --git a/package.json b/package.json
index 147e0d25..99875654 100644
--- a/package.json
+++ b/package.json
@@ -5,8 +5,10 @@
     "test": "node .validate"
   },
   "dependencies": {
+    "algorithm-visualizer": "latest",
     "fs-extra": "^8.0.1",
-    "signale": "^1.4.0",
-    "algorithm-visualizer": "latest"
+    "request": "^2.88.0",
+    "request-promise": "^4.2.4",
+    "signale": "^1.4.0"
   }
 }