diff --git a/bin/near-cli.js b/bin/near-cli.js
index c343c471..072e2362 100644
--- a/bin/near-cli.js
+++ b/bin/near-cli.js
@@ -181,6 +181,17 @@ yargs // eslint-disable-line
         type: 'string',
         default: "44'/397'/0'/0'/1'"
     })
+    .options('seedPhrase', {
+        desc: 'Seed phrase mnemonic',
+        type: 'string',
+        required: false
+    })
+    .options('seedPath', {
+        desc: 'HD path derivation',
+        type: 'string',
+        default: "m/44'/397'/0'",
+        required: false
+    })
     .option('walletUrl', {
         desc: 'Website for NEAR Wallet',
         type: 'string'
@@ -212,6 +223,7 @@ yargs // eslint-disable-line
     .middleware(require('../middleware/print-options'))
     .middleware(require('../middleware/key-store'))
     .middleware(require('../middleware/ledger'))
+    .middleware(require('../middleware/seed-phrase'))
     .command(require('../commands/create-account').createAccountCommand)
     .command(require('../commands/create-account').createAccountCommandDeprecated)
     .command(viewAccount)
diff --git a/commands/generate-key.js b/commands/generate-key.js
index 344af8b2..2c576e4e 100644
--- a/commands/generate-key.js
+++ b/commands/generate-key.js
@@ -1,19 +1,23 @@
 const KeyPair = require('near-api-js').KeyPair;
 const exitOnError = require('../utils/exit-on-error');
+const implicitAccountId = require('../utils/implicit-accountid');
 
 module.exports = {
-    command: 'generate-key <account-id>',
-    desc: 'generate key ',
+    command: 'generate-key [account-id]',
+    desc: 'generate key or show key from Ledger',
     builder: (yargs) => yargs,
     handler: exitOnError(async (argv) => {
         let near = await require('../utils/connect')(argv);
-        if (!argv.accountId) {
-            return;
-        }
 
         if (argv.usingLedger) {
-            await argv.signer.getPublicKey();
-            // NOTE: Command above already prints public key
+            if (argv.accountId) {
+                console.log('WARN: Account id is provided but ignored in case of using Ledger.');
+            }
+            const publicKey = await argv.signer.getPublicKey();
+            // NOTE: Command above already prints public key.
+            console.log(`Implicit account: ${implicitAccountId(publicKey.toString())}`);
+            // TODO: query all accounts with this public key here.
+            // TODO: check if implicit account exist, and if the key doen't match already.
             return;
         }
 
@@ -24,8 +28,15 @@ module.exports = {
             return;
         }
 
-        const keyPair = KeyPair.fromRandom('ed25519');
-        await keyStore.setKey(argv.networkId, argv.accountId, keyPair);
-        console.log(`Generated key pair with ${keyPair.publicKey} public key`);
+        // If key doesn't exist, create one and store in the keyStore.
+        // Otherwise, it's expected that both key and accountId are already provided in arguments.
+        if (!argv.publicKey) {
+            const keyPair = KeyPair.fromRandom('ed25519');
+            argv.publicKey = keyPair.publicKey.toString();
+            argv.accountId = argv.accountId || implicitAccountId(argv.publicKey);
+            await keyStore.setKey(argv.networkId, argv.accountId, keyPair);
+        }
+            
+        console.log(`Key pair with ${argv.publicKey} public key for an account "${argv.accountId}"`);
     })
 };
\ No newline at end of file
diff --git a/middleware/seed-phrase.js b/middleware/seed-phrase.js
new file mode 100644
index 00000000..6e2bd06e
--- /dev/null
+++ b/middleware/seed-phrase.js
@@ -0,0 +1,23 @@
+const { parseSeedPhrase } = require('near-seed-phrase');
+const { utils: { KeyPair }, InMemorySigner } = require('near-api-js');
+const { InMemoryKeyStore } = require('near-api-js/lib/key_stores');
+
+const implicitAccountId = require('../utils/implicit-accountid');
+
+// near ... --seedPhrase="phrase" --seedPath="m/44'/397'/0'"
+// near generate-key --seedPhrase="phrase"
+module.exports = async function useSeedPhrase({ seedPhrase, seedPath, publicKey, accountId }, yargs) {
+    if (!seedPhrase) {
+        return;
+    }
+    if (yargs.usingLedger) {
+        throw new Error('Can not use both --useLedgerKey and --seedPhrase at the same time');
+    }
+    const result = parseSeedPhrase(seedPhrase, seedPath);
+    publicKey = result.publicKey;
+    let keyStore = new InMemoryKeyStore();
+    accountId = accountId || implicitAccountId(publicKey);
+    await keyStore.setKey(yargs.networkId, accountId, KeyPair.fromString(result.secretKey));
+    let signer = new InMemorySigner(keyStore);
+    return { signer, publicKey, accountId };
+};
diff --git a/package.json b/package.json
index 4ecf0b1e..9c4dfc64 100644
--- a/package.json
+++ b/package.json
@@ -42,6 +42,7 @@
     "mixpanel": "^0.11.0",
     "ncp": "^2.0.0",
     "near-api-js": "^0.29.1",
+    "near-seed-phrase": "^0.1.0",
     "open": "^7.0.1",
     "rimraf": "^3.0.0",
     "stoppable": "^1.1.0",
diff --git a/test/test_generate_key.sh b/test/test_generate_key.sh
index 1a2c74ae..20288316 100755
--- a/test/test_generate_key.sh
+++ b/test/test_generate_key.sh
@@ -13,7 +13,7 @@ if [[ ! -f "${KEY_FILE}" ]]; then
     exit 1
 fi
 
-EXPECTED=".*Generated key pair with ed25519:.+ public key.*"
+EXPECTED=".*Key pair with ed25519:.+ public key.*"
 if [[ ! "$RESULT" =~ $EXPECTED ]]; then
     echo FAILURE Unexpected output from near generate-key
     exit 1
diff --git a/utils/implicit-accountid.js b/utils/implicit-accountid.js
new file mode 100644
index 00000000..304607d0
--- /dev/null
+++ b/utils/implicit-accountid.js
@@ -0,0 +1,5 @@
+const { decode } = require('bs58');
+
+module.exports = (publicKey) => {
+    return decode(publicKey.replace('ed25519:', '')).toString('hex');
+};
diff --git a/yarn.lock b/yarn.lock
index d08aeb57..1791bfff 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -967,6 +967,25 @@ bindings@^1.4.0, bindings@^1.5.0:
   dependencies:
     file-uri-to-path "1.0.0"
 
+bip39-light@^1.0.7:
+  version "1.0.7"
+  resolved "https://registry.yarnpkg.com/bip39-light/-/bip39-light-1.0.7.tgz#06a72f251b89389a136d3f177f29b03342adc5ba"
+  integrity sha512-WDTmLRQUsiioBdTs9BmSEmkJza+8xfJmptsNJjxnoq3EydSa/ZBXT6rm66KoT3PJIRYMnhSKNR7S9YL1l7R40Q==
+  dependencies:
+    create-hash "^1.1.0"
+    pbkdf2 "^3.0.9"
+
+bip39@2.4.0:
+  version "2.4.0"
+  resolved "https://registry.yarnpkg.com/bip39/-/bip39-2.4.0.tgz#a0b8adbf163f53495f00f05d9ede7c25369ccf13"
+  integrity sha512-1++HywqIyPtWDo7gm4v0ylYbwkLvHkuwVSKbBlZBbTCP/mnkyrlARBny906VLAwxJbC5xw9EvuJasHFIZaIFMQ==
+  dependencies:
+    create-hash "^1.1.0"
+    pbkdf2 "^3.0.9"
+    randombytes "^2.0.1"
+    safe-buffer "^5.0.1"
+    unorm "^1.3.3"
+
 bl@^4.0.1:
   version "4.0.3"
   resolved "https://registry.yarnpkg.com/bl/-/bl-4.0.3.tgz#12d6287adc29080e22a705e5764b2a9522cdc489"
@@ -1171,6 +1190,14 @@ ci-info@^2.0.0:
   resolved "https://registry.yarnpkg.com/ci-info/-/ci-info-2.0.0.tgz#67a9e964be31a51e15e5010d58e6f12834002f46"
   integrity sha512-5tK7EtrZ0N+OLFMthtqOj4fI2Jeb88C4CAZPu25LDVUgXJ0A3Js4PMGqrn0JU1W0Mh1/Z8wZzYPxqUrXeBboCQ==
 
+cipher-base@^1.0.1, cipher-base@^1.0.3:
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/cipher-base/-/cipher-base-1.0.4.tgz#8760e4ecc272f4c363532f926d874aae2c1397de"
+  integrity sha512-Kkht5ye6ZGmwv40uUDZztayT2ThLQGfnj/T71N/XzeZeo3nf8foyW7zGTsPYkEya3m5f3cAypH+qe7YOrM1U2Q==
+  dependencies:
+    inherits "^2.0.1"
+    safe-buffer "^5.0.1"
+
 class-utils@^0.3.5:
   version "0.3.6"
   resolved "https://registry.yarnpkg.com/class-utils/-/class-utils-0.3.6.tgz#f93369ae8b9a7ce02fd41faad0ca83033190c463"
@@ -1300,6 +1327,41 @@ core-util-is@1.0.2, core-util-is@~1.0.0:
   resolved "https://registry.yarnpkg.com/core-util-is/-/core-util-is-1.0.2.tgz#b5fd54220aa2bc5ab57aab7140c940754503c1a7"
   integrity sha1-tf1UIgqivFq1eqtxQMlAdUUDwac=
 
+create-hash@^1.1.0, create-hash@^1.1.2:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/create-hash/-/create-hash-1.2.0.tgz#889078af11a63756bcfb59bd221996be3a9ef196"
+  integrity sha512-z00bCGNHDG8mHAkP7CtT1qVu+bFQUPjYq/4Iv3C3kWjTFV10zIjfSoeqXo9Asws8gwSHDGj/hl2u4OGIjapeCg==
+  dependencies:
+    cipher-base "^1.0.1"
+    inherits "^2.0.1"
+    md5.js "^1.3.4"
+    ripemd160 "^2.0.1"
+    sha.js "^2.4.0"
+
+create-hmac@1.1.6:
+  version "1.1.6"
+  resolved "https://registry.yarnpkg.com/create-hmac/-/create-hmac-1.1.6.tgz#acb9e221a4e17bdb076e90657c42b93e3726cf06"
+  integrity sha1-rLniIaThe9sHbpBlfEK5PjcmzwY=
+  dependencies:
+    cipher-base "^1.0.3"
+    create-hash "^1.1.0"
+    inherits "^2.0.1"
+    ripemd160 "^2.0.0"
+    safe-buffer "^5.0.1"
+    sha.js "^2.4.8"
+
+create-hmac@^1.1.4:
+  version "1.1.7"
+  resolved "https://registry.yarnpkg.com/create-hmac/-/create-hmac-1.1.7.tgz#69170c78b3ab957147b2b8b04572e47ead2243ff"
+  integrity sha512-MJG9liiZ+ogc4TzUwuvbER1JRdgvUFSB5+VR/g5h82fGaIRWMWddtKBHi7/sVhfjQZ6SehlyhvQYrcYkaUIpLg==
+  dependencies:
+    cipher-base "^1.0.3"
+    create-hash "^1.1.0"
+    inherits "^2.0.1"
+    ripemd160 "^2.0.0"
+    safe-buffer "^5.0.1"
+    sha.js "^2.4.8"
+
 cross-spawn@^6.0.0:
   version "6.0.5"
   resolved "https://registry.yarnpkg.com/cross-spawn/-/cross-spawn-6.0.5.tgz#4a5ec7c64dfae22c3a14124dbacdee846d80cbc4"
@@ -2166,6 +2228,15 @@ has-yarn@^2.1.0:
   resolved "https://registry.yarnpkg.com/has-yarn/-/has-yarn-2.1.0.tgz#137e11354a7b5bf11aa5cb649cf0c6f3ff2b2e77"
   integrity sha512-UqBRqi4ju7T+TqGNdqAO0PaSVGsDGJUBQvk9eUWNGRY1CFGDzYhLWoM7JQEemnlvVcv/YEmc2wNW8BC24EnUsw==
 
+hash-base@^3.0.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/hash-base/-/hash-base-3.1.0.tgz#55c381d9e06e1d2997a883b4a3fddfe7f0d3af33"
+  integrity sha512-1nmYp/rhMDiE7AYkDw+lLwlAzz0AntGIe51F3RfFfEqyQ3feY2eI/NcwC6umIQVOASPMsWJLJScWKSSvzL9IVA==
+  dependencies:
+    inherits "^2.0.4"
+    readable-stream "^3.6.0"
+    safe-buffer "^5.2.0"
+
 homedir-polyfill@^1.0.1:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/homedir-polyfill/-/homedir-polyfill-1.0.3.tgz#743298cef4e5af3e194161fbadcc2151d3a058e8"
@@ -2286,7 +2357,7 @@ inflight@^1.0.4:
     once "^1.3.0"
     wrappy "1"
 
-inherits@2, inherits@2.0.4, inherits@^2.0.3, inherits@^2.0.4, inherits@~2.0.3:
+inherits@2, inherits@2.0.4, inherits@^2.0.1, inherits@^2.0.3, inherits@^2.0.4, inherits@~2.0.3:
   version "2.0.4"
   resolved "https://registry.yarnpkg.com/inherits/-/inherits-2.0.4.tgz#0fa2c64f932917c3433a0ded55363aae37416b7c"
   integrity sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ==
@@ -3209,6 +3280,15 @@ map-visit@^1.0.0:
   dependencies:
     object-visit "^1.0.0"
 
+md5.js@^1.3.4:
+  version "1.3.5"
+  resolved "https://registry.yarnpkg.com/md5.js/-/md5.js-1.3.5.tgz#b5d07b8e3216e3e27cd728d72f70d1e6a342005f"
+  integrity sha512-xitP+WxNPcTTOgnTJcrhM0xvdPepipPSf3I8EIpGKeFLjt3PlJLIDG3u8EX53ZIubkb+5U2+3rELYpEhHhzdkg==
+  dependencies:
+    hash-base "^3.0.0"
+    inherits "^2.0.1"
+    safe-buffer "^5.1.2"
+
 meow@^3.7.0:
   version "3.7.0"
   resolved "https://registry.yarnpkg.com/meow/-/meow-3.7.0.tgz#72cb668b425228290abbfa856892587308a801fb"
@@ -3397,6 +3477,15 @@ near-api-js@^0.29.1:
     text-encoding-utf-8 "^1.0.2"
     tweetnacl "^1.0.1"
 
+near-hd-key@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/near-hd-key/-/near-hd-key-1.0.0.tgz#b18fbbc8d5348a29d226ec8d546ba089afc42ce8"
+  integrity sha512-NknsGxGM1YivNUKdlhYl1pPWtRGOg8uBSJHd0j4B8mk0MxAeumIcorazp4V888sJleu/GptfPcGNlfiEf0zXaw==
+  dependencies:
+    bip39 "2.4.0"
+    create-hmac "1.1.6"
+    tweetnacl "^1.0.1"
+
 near-ledger-js@^0.1.1:
   version "0.1.2"
   resolved "https://registry.yarnpkg.com/near-ledger-js/-/near-ledger-js-0.1.2.tgz#7766e530428db4f62ec8055aba3c80956caa3825"
@@ -3404,6 +3493,16 @@ near-ledger-js@^0.1.1:
   dependencies:
     bs58 "^4.0.1"
 
+near-seed-phrase@^0.1.0:
+  version "0.1.0"
+  resolved "https://registry.yarnpkg.com/near-seed-phrase/-/near-seed-phrase-0.1.0.tgz#8a9a842fc112759e86dfe65325a113a9dbd6a526"
+  integrity sha512-tkeb9LUi/2w1mHjP1xwTrTSQyaUBQRbYtgUnhUTJjFznXVRi4Ai+jifWhwPDvSjQ0IPqYmD8MuWRie3kY0yT1g==
+  dependencies:
+    bip39-light "^1.0.7"
+    bs58 "^4.0.1"
+    near-hd-key "^1.0.0"
+    tweetnacl "^1.0.2"
+
 nice-try@^1.0.4:
   version "1.0.5"
   resolved "https://registry.yarnpkg.com/nice-try/-/nice-try-1.0.5.tgz#a3378a7696ce7d223e88fc9b764bd7ef1089e366"
@@ -3729,6 +3828,17 @@ path-type@^1.0.0:
     pify "^2.0.0"
     pinkie-promise "^2.0.0"
 
+pbkdf2@^3.0.9:
+  version "3.1.1"
+  resolved "https://registry.yarnpkg.com/pbkdf2/-/pbkdf2-3.1.1.tgz#cb8724b0fada984596856d1a6ebafd3584654b94"
+  integrity sha512-4Ejy1OPxi9f2tt1rRV7Go7zmfDQ+ZectEQz3VGUQhgq62HtIRPDyG/JtnwIxs6x3uNMwo2V7q1fMvKjb+Tnpqg==
+  dependencies:
+    create-hash "^1.1.2"
+    create-hmac "^1.1.4"
+    ripemd160 "^2.0.1"
+    safe-buffer "^5.0.1"
+    sha.js "^2.4.8"
+
 performance-now@^2.1.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/performance-now/-/performance-now-2.1.0.tgz#6309f4e0e5fa913ec1c69307ae364b4b377c9e7b"
@@ -3869,6 +3979,13 @@ qs@~6.5.2:
   resolved "https://registry.yarnpkg.com/qs/-/qs-6.5.2.tgz#cb3ae806e8740444584ef154ce8ee98d403f3e36"
   integrity sha512-N5ZAX4/LxJmF+7wN74pUD6qAh9/wnvdQcjq9TZjevvXzSUo7bfmw91saqMjzGS2xq91/odN2dW/WOl7qQHNDGA==
 
+randombytes@^2.0.1:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/randombytes/-/randombytes-2.1.0.tgz#df6f84372f0270dc65cdf6291349ab7a473d4f2a"
+  integrity sha512-vYl3iOX+4CKUWuxGi9Ukhie6fsqXqS9FE2Zaic4tNFD2N2QQaXOMFbuKK4QmDHC0JO6B1Zp41J0LpT0oR68amQ==
+  dependencies:
+    safe-buffer "^5.1.0"
+
 rc@^1.2.7, rc@^1.2.8:
   version "1.2.8"
   resolved "https://registry.yarnpkg.com/rc/-/rc-1.2.8.tgz#cd924bf5200a075b83c188cd6b9e211b7fc0d3ed"
@@ -3933,7 +4050,7 @@ readable-stream@^2.0.6:
     string_decoder "~1.1.1"
     util-deprecate "~1.0.1"
 
-readable-stream@^3.1.1, readable-stream@^3.4.0:
+readable-stream@^3.1.1, readable-stream@^3.4.0, readable-stream@^3.6.0:
   version "3.6.0"
   resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-3.6.0.tgz#337bbda3adc0706bd3e024426a286d4b4b2c9198"
   integrity sha512-BViHy7LKeTz4oNnkcLJ+lVSL6vpiFeX6/d3oSH8zCW7UxP2onchk+vTGB143xuFjHS3deTgkKoXXymXqymiIdA==
@@ -4106,6 +4223,14 @@ rimraf@^3.0.0:
   dependencies:
     glob "^7.1.3"
 
+ripemd160@^2.0.0, ripemd160@^2.0.1:
+  version "2.0.2"
+  resolved "https://registry.yarnpkg.com/ripemd160/-/ripemd160-2.0.2.tgz#a1c1a6f624751577ba5d07914cbc92850585890c"
+  integrity sha512-ii4iagi25WusVoiC4B4lq7pbXfAp3D9v5CwfkY33vffw2+pkDjY1D8GaN7spsxvCSx8dkPqOZCEZyfxcmJG2IA==
+  dependencies:
+    hash-base "^3.0.0"
+    inherits "^2.0.1"
+
 rsvp@^4.8.4:
   version "4.8.5"
   resolved "https://registry.yarnpkg.com/rsvp/-/rsvp-4.8.5.tgz#c8f155311d167f68f21e168df71ec5b083113734"
@@ -4118,7 +4243,7 @@ rxjs@^6.6.3:
   dependencies:
     tslib "^1.9.0"
 
-safe-buffer@^5.0.1, safe-buffer@^5.1.2, safe-buffer@~5.2.0:
+safe-buffer@^5.0.1, safe-buffer@^5.1.0, safe-buffer@^5.1.2, safe-buffer@^5.2.0, safe-buffer@~5.2.0:
   version "5.2.1"
   resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.2.1.tgz#1eaf9fa9bdb1fdd4ec75f58f9cdb4e6b7827eec6"
   integrity sha512-rp3So07KcdmmKbGvgaNxQSJr7bGVSVk5S9Eq1F+ppbRo70+YeaDxkw5Dd8NPN+GD6bjnYm2VuPuCXmpuYvmCXQ==
@@ -4204,6 +4329,14 @@ setprototypeof@1.2.0:
   resolved "https://registry.yarnpkg.com/setprototypeof/-/setprototypeof-1.2.0.tgz#66c9a24a73f9fc28cbe66b09fed3d33dcaf1b424"
   integrity sha512-E5LDX7Wrp85Kil5bhZv46j8jOeboKq5JMmYM3gVGdGH8xFpPWXUMsNrlODCrkoxMEeNi/XZIwuRvY4XNwYMJpw==
 
+sha.js@^2.4.0, sha.js@^2.4.8:
+  version "2.4.11"
+  resolved "https://registry.yarnpkg.com/sha.js/-/sha.js-2.4.11.tgz#37a5cf0b81ecbc6943de109ba2960d1b26584ae7"
+  integrity sha512-QMEp5B7cftE7APOjk5Y6xgrbWu+WkLVQwk8JNjZ8nKRciZaByEW6MubieAiToS7+dwvrjGhH8jRXz3MVd0AYqQ==
+  dependencies:
+    inherits "^2.0.1"
+    safe-buffer "^5.0.1"
+
 shebang-command@^1.2.0:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/shebang-command/-/shebang-command-1.2.0.tgz#44aac65b695b03398968c39f363fee5deafdf1ea"
@@ -4756,7 +4889,7 @@ tweetnacl@^0.14.3, tweetnacl@~0.14.0:
   resolved "https://registry.yarnpkg.com/tweetnacl/-/tweetnacl-0.14.5.tgz#5ae68177f192d4456269d108afa93ff8743f4f64"
   integrity sha1-WuaBd/GS1EViadEIr6k/+HQ/T2Q=
 
-tweetnacl@^1.0.1:
+tweetnacl@^1.0.1, tweetnacl@^1.0.2:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/tweetnacl/-/tweetnacl-1.0.3.tgz#ac0af71680458d8a6378d0d0d050ab1407d35596"
   integrity sha512-6rt+RN7aOi1nGMyC4Xa5DdYiukl2UWCbcJft7YhxReBGQD7OAM8Pbxw6YMo4r2diNEA8FEmu32YOn9rhaiE5yw==
@@ -4824,6 +4957,11 @@ unique-string@^2.0.0:
   dependencies:
     crypto-random-string "^2.0.0"
 
+unorm@^1.3.3:
+  version "1.6.0"
+  resolved "https://registry.yarnpkg.com/unorm/-/unorm-1.6.0.tgz#029b289661fba714f1a9af439eb51d9b16c205af"
+  integrity sha512-b2/KCUlYZUeA7JFUuRJZPUtr4gZvBh7tavtv4fvk4+KV9pfGiR6CQAQAWl49ZpR3ts2dk4FYkP7EIgDJoiOLDA==
+
 unset-value@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/unset-value/-/unset-value-1.0.0.tgz#8376873f7d2335179ffb1e6fc3a8ed0dfc8ab559"