diff --git a/src/nodes/CommandJoin.ts b/src/nodes/CommandJoin.ts
new file mode 100644
index 00000000..2ef822e8
--- /dev/null
+++ b/src/nodes/CommandJoin.ts
@@ -0,0 +1,74 @@
+import type PolykeyClient from 'polykey/PolykeyClient.js';
+import type { Hostname } from 'polykey/network/types.js';
+import type { NodeIdEncoded, NodeAddress } from 'polykey/nodes/types.js';
+import CommandPolykey from '../CommandPolykey.js';
+import * as binUtils from '../utils/index.js';
+import * as binOptions from '../utils/options.js';
+import * as binProcessors from '../utils/processors.js';
+
+class CommandJoin extends CommandPolykey {
+  constructor(...args: ConstructorParameters<typeof CommandPolykey>) {
+    super(...args);
+    this.name('join');
+    this.description('Join a network');
+    this.argument('<network>', 'Name of the network to join');
+    this.addOption(binOptions.nodeId);
+    this.addOption(binOptions.clientHost);
+    this.addOption(binOptions.clientPort);
+    this.action(async (network: string, options) => {
+      const { default: PolykeyClient } = await import(
+        'polykey/PolykeyClient.js'
+      );
+      const nodesUtils = await import('polykey/nodes/utils.js');
+      const utils = await import('polykey/utils/index.js');
+      const clientOptions = await binProcessors.processClientOptions(
+        options.nodePath,
+        options.nodeId,
+        options.clientHost,
+        options.clientPort,
+        this.fs,
+        this.logger.getChild(binProcessors.processClientOptions.name),
+      );
+      const auth = await binProcessors.processAuthentication(
+        options.passwordFile,
+        this.fs,
+      );
+
+      let pkClient: PolykeyClient;
+      this.exitHandlers.handlers.push(async () => {
+        if (pkClient != null) await pkClient.stop();
+      });
+      try {
+        pkClient = await PolykeyClient.createPolykeyClient({
+          nodeId: clientOptions.nodeId,
+          host: clientOptions.clientHost,
+          port: clientOptions.clientPort,
+          options: {
+            nodePath: options.nodePath,
+          },
+          logger: this.logger.getChild(PolykeyClient.name),
+        });
+        const seedNodes = await nodesUtils.resolveSeednodes(
+          network as Hostname,
+        );
+        const initialNodes = Object.entries(seedNodes) as Array<
+          [NodeIdEncoded, NodeAddress]
+        >;
+        await binUtils.retryAuthentication(
+          (auth) =>
+            pkClient.rpcClient.methods.nodesSyncGraph({
+              network,
+              initialNodes,
+              metadata: auth,
+            }),
+          auth,
+        );
+        process.stdout.write(`Switched to network ${network}`);
+      } finally {
+        if (pkClient! != null) await pkClient.stop();
+      }
+    });
+  }
+}
+
+export default CommandJoin;
diff --git a/src/nodes/CommandNodes.ts b/src/nodes/CommandNodes.ts
index 0c3eff4e..e5bc495f 100644
--- a/src/nodes/CommandNodes.ts
+++ b/src/nodes/CommandNodes.ts
@@ -1,6 +1,7 @@
 import CommandAdd from './CommandAdd.js';
 import CommandClaim from './CommandClaim.js';
 import CommandFind from './CommandFind.js';
+import CommandJoin from './CommandJoin.js';
 import CommandPing from './CommandPing.js';
 import CommandGetAll from './CommandGetAll.js';
 import CommandConnections from './CommandConnections.js';
@@ -14,6 +15,7 @@ class CommandNodes extends CommandPolykey {
     this.addCommand(new CommandAdd(...args));
     this.addCommand(new CommandClaim(...args));
     this.addCommand(new CommandFind(...args));
+    this.addCommand(new CommandJoin(...args));
     this.addCommand(new CommandPing(...args));
     this.addCommand(new CommandGetAll(...args));
     this.addCommand(new CommandConnections(...args));
diff --git a/tests/nodes/join.test.ts b/tests/nodes/join.test.ts
new file mode 100644
index 00000000..9c4ccfb8
--- /dev/null
+++ b/tests/nodes/join.test.ts
@@ -0,0 +1,125 @@
+import type { NodeId } from 'polykey/ids/types.js';
+import type { SeedNodes } from 'polykey/nodes/types.js';
+import path from 'node:path';
+import fs from 'node:fs';
+import Logger, { LogLevel, StreamHandler } from '@matrixai/logger';
+import { encodeNodeId, decodeNodeId } from 'polykey/nodes/utils.js';
+import { verifyClaimNetworkAuthority } from 'polykey/claims/payloads/claimNetworkAuthority.js';
+import { jest } from '@jest/globals';
+import PolykeyAgent from 'polykey/PolykeyAgent.js';
+import * as keysUtils from 'polykey/keys/utils/index.js';
+import * as testUtils from '../utils/index.js';
+
+let seedNodeId: NodeId;
+let seedNodeIdEncoded = '';
+let seedNodeHost = '';
+let seedNodePort = 0;
+jest.unstable_mockModule('polykey/nodes/utils.js', () => {
+  return {
+    __esModule: true,
+    decodeNodeId,
+    resolveSeednodes: jest
+      .fn<() => Promise<SeedNodes>>()
+      .mockImplementation(async () => {
+        const nodes: SeedNodes = {};
+        nodes[seedNodeIdEncoded] = [seedNodeHost, seedNodePort];
+        return nodes;
+      }),
+  };
+});
+
+describe('join', () => {
+  const logger = new Logger('join test', LogLevel.WARN, [new StreamHandler()]);
+  const password = 'helloworld';
+  let dataDir: string;
+  let nodePath: string;
+  let polykeyAgent: PolykeyAgent;
+  let seedNode: PolykeyAgent;
+  let seedNodeClaimNetworkAuthority;
+  let networkKeyPair;
+  let networkNodeId;
+  let network = 'test.network.com';
+  beforeEach(async () => {
+    dataDir = await fs.promises.mkdtemp(
+      path.join(globalThis.tmpDir, 'polykey-test-'),
+    );
+    networkKeyPair = keysUtils.generateKeyPair();
+    networkNodeId = keysUtils.publicKeyToNodeId(networkKeyPair.publicKey);
+    network = 'test.network.com';
+    nodePath = path.join(dataDir, 'keynode');
+    polykeyAgent = await PolykeyAgent.createPolykeyAgent({
+      password,
+      options: {
+        seedNodes: {}, // Explicitly no seed nodes on startup
+        nodePath,
+        agentServiceHost: '127.0.0.1',
+        clientServiceHost: '127.0.0.1',
+        keys: {
+          passwordOpsLimit: keysUtils.passwordOpsLimits.min,
+          passwordMemLimit: keysUtils.passwordMemLimits.min,
+          strictMemoryLock: false,
+        },
+      },
+      logger,
+    });
+    // Setting up a remote seednode
+    seedNode = await PolykeyAgent.createPolykeyAgent({
+      password,
+      options: {
+        nodePath: path.join(dataDir, 'seednode'),
+        agentServiceHost: '127.0.0.1',
+        clientServiceHost: '127.0.0.1',
+        keys: {
+          passwordOpsLimit: keysUtils.passwordOpsLimits.min,
+          passwordMemLimit: keysUtils.passwordMemLimits.min,
+          strictMemoryLock: false,
+        },
+      },
+      logger,
+    });
+    [, seedNodeClaimNetworkAuthority] =
+      await seedNode.nodeManager.createClaimNetworkAuthority(
+        networkNodeId,
+        network,
+        false,
+        async (claim) => {
+          claim.signWithPrivateKey(networkKeyPair.privateKey);
+          return claim;
+        },
+      );
+    await seedNode.nodeManager.createSelfSignedClaimNetworkAccess(
+      seedNodeClaimNetworkAuthority,
+    );
+    await testUtils.nodesConnect(polykeyAgent, seedNode);
+    seedNodeId = seedNode.keyRing.getNodeId();
+    seedNodeHost = seedNode.agentServiceHost;
+    seedNodePort = seedNode.agentServicePort;
+    seedNodeIdEncoded = encodeNodeId(seedNodeId);
+  });
+  afterEach(async () => {
+    jest.restoreAllMocks();
+    await polykeyAgent.stop();
+    await seedNode.stop();
+    await fs.promises.rm(dataDir, {
+      force: true,
+      recursive: true,
+    });
+  });
+  test('should connect to a seednode', async () => {
+    const command = ['nodes', 'join', '-np', nodePath, network];
+    const result = await testUtils.pkStdio(command, {
+      env: { PK_PASSWORD: password },
+      cwd: dataDir,
+    });
+    expect(result.exitCode).toBe(0);
+
+    expect(() =>
+      verifyClaimNetworkAuthority(
+        networkNodeId,
+        seedNodeId,
+        network,
+        seedNodeClaimNetworkAuthority,
+      ),
+    ).not.toThrow();
+  });
+});