diff --git a/src/index.ts b/src/index.ts
index 570548f..9cf73ed 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -12,6 +12,7 @@ import { createTxMsgCancelBond, createTxMsgCreateBond, createTxMsgRefillBond, cr
 import { RegistryClient } from "./registry-client";
 import { Account } from "./account";
 import { createTransaction } from "./txbuilder";
+import { createTxMsgReserveAuthority, MessageMsgReserveAuthority } from './nameservice';
 
 const DEFAULT_WRITE_ERROR = 'Unable to write to chiba-clonk.';
 
@@ -215,6 +216,39 @@ export class Registry {
     return parseTxResponse(result);
   }
 
+  /**
+   * Reserve authority.
+   */
+   async reserveAuthority(params: MessageMsgReserveAuthority, senderAddress: string, privateKey: string, fee: Fee) {
+    let result;
+
+    try {
+      const { account: { base_account: accountInfo } } = await this.getAccount(senderAddress);
+
+      const sender = {
+        accountAddress: accountInfo.address,
+        sequence: accountInfo.sequence,
+        accountNumber: accountInfo.account_number,
+        pubkey: accountInfo.pub_key.key,
+      }
+
+      const msg = createTxMsgReserveAuthority(this._chain, sender, fee, '', params)
+      result = await this._submitTx(msg, privateKey, sender);
+    } catch (err: any) {
+      const error = err[0] || err;
+      throw new Error(Registry.processWriteError(error));
+    }
+
+    return parseTxResponse(result);
+  }
+
+  /**
+   * Lookup authorities by names.
+   */
+   async lookupAuthorities(names: string[], auction = false) {
+    return this._client.lookupAuthorities(names, auction);
+  }
+
   /**
    * Submit a generic Tx to the chain.
    */
@@ -237,3 +271,5 @@ export class Registry {
     return response;
   }
 }
+
+export { Account }
diff --git a/src/nameservice.ts b/src/nameservice.ts
new file mode 100644
index 0000000..c8590ad
--- /dev/null
+++ b/src/nameservice.ts
@@ -0,0 +1,118 @@
+import {
+  createEIP712,
+  generateFee,
+  generateMessage,
+  generateTypes,
+} from '@tharsis/eip712'
+import {
+  Chain,
+  Sender,
+  Fee,
+} from '@tharsis/transactions'
+import { createTransaction } from '@tharsis/proto'
+
+import * as nameserviceTx from './proto/vulcanize/nameservice/v1beta1/tx'
+
+const MSG_RESERVE_AUTHORITY_TYPES = {
+  MsgValue: [
+    { name: 'name', type: 'string' },
+    { name: 'signer', type: 'string' },
+    { name: 'owner', type: 'string' },
+  ],
+}
+
+export interface MessageMsgReserveAuthority {
+  name: string
+  owner: string
+}
+
+export function createTxMsgReserveAuthority(
+  chain: Chain,
+  sender: Sender,
+  fee: Fee,
+  memo: string,
+  params: MessageMsgReserveAuthority,
+) {
+  // EIP712
+  const feeObject = generateFee(
+    fee.amount,
+    fee.denom,
+    fee.gas,
+    sender.accountAddress,
+  )
+  const types = generateTypes(MSG_RESERVE_AUTHORITY_TYPES)
+
+  const msg = createMsgReserveAuthority(
+    params.name,
+    sender.accountAddress,
+    params.owner
+  )
+
+  const messages = generateMessage(
+    sender.accountNumber.toString(),
+    sender.sequence.toString(),
+    chain.cosmosChainId,
+    memo,
+    feeObject,
+    msg,
+  )
+  const eipToSign = createEIP712(types, chain.chainId, messages)
+
+  // Cosmos
+  const msgCosmos = protoCreateMsgReserveAuthority(
+    params.name,
+    sender.accountAddress,
+    params.owner
+  )
+
+  const tx = createTransaction(
+    msgCosmos,
+    memo,
+    fee.amount,
+    fee.denom,
+    parseInt(fee.gas, 10),
+    'ethsecp256',
+    sender.pubkey,
+    sender.sequence,
+    sender.accountNumber,
+    chain.cosmosChainId,
+  )
+
+  return {
+    signDirect: tx.signDirect,
+    legacyAmino: tx.legacyAmino,
+    eipToSign,
+  }
+}
+
+function createMsgReserveAuthority(
+  name: string,
+  signer: string,
+  owner: string
+) {
+  return {
+    type: 'nameservice/ReserveAuthority',
+    value: {
+      name,
+      signer,
+      owner
+    },
+  }
+}
+
+const protoCreateMsgReserveAuthority = (
+  name: string,
+  signer: string,
+  owner: string,
+) => {
+  const reserveAuthorityMessage = new nameserviceTx.vulcanize.nameservice.v1beta1.MsgReserveAuthority({
+    name,
+    signer,
+    owner
+  })
+
+  return {
+    message: reserveAuthorityMessage,
+    path: 'vulcanize.nameservice.v1beta1.MsgReserveAuthority',
+  }
+}
diff --git a/src/naming.test.ts b/src/naming.test.ts
new file mode 100644
index 0000000..471bbd0
--- /dev/null
+++ b/src/naming.test.ts
@@ -0,0 +1,53 @@
+import { Registry } from './index';
+import { getConfig, wait } from './testing/helper';
+
+jest.setTimeout(120 * 1000);
+
+const { mockServer, chibaClonk: { chainId, restEndpoint, gqlEndpoint, privateKey, accountAddress, fee } } = getConfig();
+
+const namingTests = () => {
+  let registry: Registry;
+
+  let bondId: string;
+
+  let authorityName: string;
+
+  beforeAll(async () => {
+    registry = new Registry(restEndpoint, gqlEndpoint, chainId);
+
+    // Create bond.
+    bondId = await registry.getNextBondId(accountAddress);
+    await registry.createBond({ denom: 'aphoton', amount: '1000000000' }, accountAddress, privateKey, fee);
+    await wait(5000)
+  });
+
+  test('Reserve authority.', async () => {
+    authorityName = `dxos-${Date.now()}`;
+    await registry.reserveAuthority({ name: authorityName, owner: accountAddress }, accountAddress, privateKey, fee);
+    await wait(5000)
+  });
+
+  test('Lookup authority.', async () => {
+    const [record] = await registry.lookupAuthorities([authorityName]);
+
+    expect(record).toBeDefined();
+    expect(record.ownerAddress).not.toBe('');
+    expect(record.ownerPublicKey).not.toBe('');
+    expect(Number(record.height)).toBeGreaterThan(0);
+  });
+
+  test('Lookup non existing authority', async () => {
+    const [record] = await registry.lookupAuthorities(['does-not-exist']);
+
+    expect(record.ownerAddress).toBe('');
+    expect(record.ownerPublicKey).toBe('');
+    expect(Number(record.height)).toBe(0);
+  });
+};
+
+if (mockServer || process.env.WIRE_AUCTIONS_ENABLED) {
+  // Required as jest complains if file has no tests.
+  test('skipping naming tests', () => {});
+} else {
+  describe('Naming', namingTests);
+}
diff --git a/src/registry-client.ts b/src/registry-client.ts
index d4195f6..dc395ce 100644
--- a/src/registry-client.ts
+++ b/src/registry-client.ts
@@ -5,6 +5,55 @@ import { generateEndpointAccount, generateEndpointBroadcast, generatePostBodyBro
 
 import { Util } from './util';
 
+const auctionFields = `
+  id
+  status
+  ownerAddress
+  createTime
+  commitsEndTime
+  revealsEndTime
+  commitFee {
+    type
+    quantity
+  }
+  revealFee {
+    type
+    quantity
+  }
+  minimumBid {
+    type
+    quantity
+  }
+  winnerAddress
+  winnerBid {
+    type
+    quantity
+  }
+  winnerPrice {
+    type
+    quantity
+  }
+  bids {
+    bidderAddress
+    status
+    commitHash
+    commitTime
+    revealTime
+    commitFee {
+      type
+      quantity
+    }
+    revealFee {
+      type
+      quantity
+    }
+    bidAmount {
+      type
+      quantity
+    }
+  }
+`;
+
 /**
  * Registry
  */
@@ -51,6 +100,33 @@ export class RegistryClient {
     return data
   }
 
+  /**
+   * Lookup authorities by names.
+   */
+   async lookupAuthorities(names: string[], auction = false) {
+    assert(names.length);
+
+    const query = `query ($names: [String!]) {
+      lookupAuthorities(names: $names) {
+        ownerAddress
+        ownerPublicKey
+        height
+        status
+        bondId
+        expiryTime
+        ${auction ? ('auction { ' + auctionFields + ' }') : ''}
+      }
+    }`;
+
+    const variables = {
+      names
+    };
+
+    const result = await this._graph(query)(variables);
+
+    return result['lookupAuthorities'];
+  }
+
   /**
    * Get bonds by ids.
    */
diff --git a/src/testing/helper.ts b/src/testing/helper.ts
index cffd4f8..8b000ef 100644
--- a/src/testing/helper.ts
+++ b/src/testing/helper.ts
@@ -1,5 +1,5 @@
-const DEFAULT_PRIVATE_KEY = '3d8e23810daecb66ec4ca97805f6bbfc102015c3f22cdda1a783b1d074c43bdd';
-const DEFAULT_ADDRESS = 'ethm1lrdrh056ce23h9d9d5rx34tp0uwj0u9zumynx3'
+const DEFAULT_PRIVATE_KEY = '39e06e1471f69a76491e60d1d22908789bf7801039a9ac2197ed432ad45d2daf';
+const DEFAULT_ADDRESS = 'ethm1p9fqwtlypqptuqgndpce5g6wncj4py9z30wfkt'
 
 export const wait = (time: number) => new Promise(resolve => setTimeout(resolve, time))