Reach on social
Prepare announcements for X, Instagram and Threads around your offer or event.
Free cloud · LINE founding slots214 slots left
Reach on social.Connect on LINE.With your AI.
For small teams selling courses, running seminars and delivering services. Manage your channels with Codex or Claude Code. Use research from Grok Bot or Meta’s Muse to shape your posts and messages. Connect official LINE, and personal LINE in supported workspaces.
Official & personal LINEXInstagramThreads
Sign in with Google · No credit card required
Cloud hosting stays free for founding slots. Platform and AI service fees are separate. Setup and the dashboard are currently in Japanese.
01START WITH YOUR AI
DIRECT & MANAGE
CodexOpenAI
Claude CodeAnthropic
RESEARCH & DISCOVER
Grok BotxAI
MuseMeta AI
Turn requests & research into a plan
YOUR AI CONTROL CENTER
The Harness.cloud
Posts, messages & customer context
Plan→Review→Publish
Manage connected channels
02REACH ON SOCIAL
From discovery to conversation
03CONNECT ON LINE
LINE OfficialMessages & CRM
Personal LINEChats & groups
Use saved conversations and history to plan what’s next.
From research to posts and LINE conversations.
Connect and authorize each service first. Personal LINE is available in supported workspaces. Features depend on your AI and channel permissions.
Reach and follow upSocial channels and LINE
Reusable stepsSave and edit kits
Build on historyKeep customer context
FROM POSTS TO FOLLOW-UPAnnouncements and follow-up.
01 / REACH → 02 / INVITE → 03 / FOLLOW UP → 04 / REUSE ↻
Announcements and follow-up.
Reusable steps in a kit.
Combine social announcements and LINE messaging steps around one offer and schedule. Edit the wording and timing, then save the kit for your next launch.
Invite on LINE
Draft a signup form invitation or detailed message for a selected customer.
Follow up after purchase
Use payment confirmation as a condition for preparing getting-started and follow-up messages.
Use it again
Copy the kit, then revise the offer, dates and wording for your next launch.
Kits require configured connections, recipients and conditions. These individual LINE steps target a selected customer; activation and sending require approval. Payment confirmation requires a compatible LINE environment and configured form. Kit purchasing and sales are not yet available.
2026-10-26 / RELEASE
Threads Harness is now generally available.
Manage multiple accounts, publish text, threads, images, videos and carousels, schedule posts, and view insights. Connect through the dedicated MCP server or API.
Connect with a Threads user token. OAuth sign-in, automatic token renewal and direct file uploads are not supported. A scheduled time is when publishing begins.
Get started with Threads ↗01 / ALL YOUR CHANNELSSocial publishing and customer care.
Social publishing and customer care.
Plan them together.
LINE, X, Instagram and Threads in one cloud. Start with the platform you need.
LINE
Live
Messaging, scheduling and CRM
Explore features
- Broadcasts, drip campaigns and scheduled messages
- Contact CRM and one-to-one chat
- Forms and rich menus
- Google Calendar integration
- Personal LINE chats and groups in supported workspaces
X
Live beta
Publishing, scheduling and research
Explore features
- Posts and threads
- Scheduled posts
- Search and research
- Post analytics
Beta
Posts, scheduling and DMs
Explore features
- Post management
- Scheduled posts
- DM management
- API and MCP integration
Threads
Generally available
Multiple accounts, posts and insights
Explore features
- Manage and switch between accounts
- Text, threads, images, videos and carousels
- Scheduling, publishing history and six insight metrics
- Dedicated MCP, API and OpenAPI specification
Connect with a Threads user token. OAuth sign-in, automatic token renewal and direct file uploads are not supported. A scheduled time is when publishing begins.
Publishing and messaging require valid credentials and permissions for each platform. Available features vary by platform.
02 / ONE AI, ALL CHANNELSPrepare your next launch
Prepare your next launch
in a conversation.
Manage posts, scheduled messages and customer context with Codex or Claude Code. Ask Grok Bot or Meta’s Muse to research and gather information. Use those findings to shape your plans and posts, then connect with customers on LINE.
- 01Create your cloud environment
Sign in with Google and create a dedicated environment for the platform you want to use.
- 02Connect your accounts and AI
Connect your social accounts, then configure each environment’s API or MCP connection in your AI agent.
- 03Describe what you want to do
Specify the audience, content and timing. Scheduled tasks run in the cloud.
YOUR AI → THE HARNESSExample request
Our seminar is next month.
Draft social posts and LINE signup messages.
Prepare post-purchase messages too.
XA short announcement with a signup link
InstagramA post introducing the course
ThreadsA thread about why we are running the seminar
LINESignup and post-purchase message drafts
An example workflow after setup. Review the content, then instruct your AI to publish or send it. Each platform uses its own MCP server or API. The Threads MCP server runs locally via stdio.
03 / KEEP YOUR BUSINESS MOVINGPublish. Connect.
01 / CREATE → 02 / DELIVER → 03 / REMEMBER → 04 / IMPROVE ↻
Publish. Connect.
Build on what you learn.
Make each interaction useful for the next one. Work with your AI using the post history, conversations and customer profiles stored in each environment.
Create
Turn one idea into content suited to each platform, with your AI.
Deliver
Publish, schedule and send through APIs. The cloud runs tasks at the times you set.
Remember
Manage conversations, customer data and post history in each platform’s dedicated environment.
Improve
Review connected data with your AI to plan your next posts and messages.
The data you can store and access varies by platform. Customers are not automatically matched across platforms.
04 / ZERO-YEN CLOUD
The cloud foundation. Free.
We take care of setting up and running the infrastructure. You can start with the platform you need.
Cloud hosting for founding slots
0JPY
Free forever. No credit card required.
Create your free cloud ↗Get started in minutes. Sign in with Google; no credit card required.
214 of 1000 slots remaining (LINE founding allocation)
So you can focus on your channels.
- Setup and operation of your dedicated cloud environment
- Dashboards for posts, messages and customer data
- APIs and MCP connections for your AI
The free offer covers cloud hosting for founding slots. LINE Official Account, X API and AI services may charge separately. See the Terms of Service (Japanese) for usage limits and service conditions.
SEE IT IN ACTION
See how it works.
Watch the LINE Harness introduction to see how AI connects to everyday operations.
This video is in Japanese and introduces LINE Harness. For current support and pricing across all four platforms, refer to this page.
FROM THE DEVELOPER
Updates from the developer.
AI workflows, messaging and webinars, introduced in public posts by developer Shuichi Noda.
Read the full post on X (Japanese) ↗LINE公式アカウントの配信ツールを、Claude Codeから操作できるようにしてOSSにした。
— 野田修一 (@ai_shunoda)
Read the full post on X (Japanese) ↗LINE配信ツールに課金する時代、終わりました。ステップ配信、セグメント、リッチメニュー、決済連携、AI自動化。全機能、0円。オープンソース。
— 野田修一 (@ai_shunoda)
Read the full post on X (Japanese) ↗ついに最強のウェビナーシステムが完成しました。「最強」と言い切れる理由を並べます。✅ LINEから一切離脱しない
— 野田修一 (@ai_shunoda)
These original Japanese posts describe the open-source version at the time of publication. Refer to this page for current cloud features and service conditions.
QUESTIONS, ANSWERED
Before you get started.
Is it really free?
Cloud hosting for environments provisioned within the founding allocation stays free forever. That promise remains even if usage limits are introduced. Social platform and AI service fees are separate.
Does one API key or MCP connection cover every platform?
Each platform’s dedicated environment currently has its own API key and connection settings. Connect through the dedicated MCP server or API for each platform. The Threads MCP server is a repository-local stdio implementation. Configure these connections in the same AI agent to work across platforms in one conversation.
How can I use Grok Bot and Muse?
Use them for research and information gathering, then apply the findings to campaign plans, posts and LINE message drafts. Codex and Claude Code let you manage connected social and LINE workspaces. Configure and authorize the services you use; available information and actions depend on the service and permissions.
Can I connect personal LINE?
Personal LINE is available in supported LINE workspaces, where you choose the chats and groups to connect. Available features depend on the connected service and permissions.
Can I use it without connecting an AI?
Yes. Each platform has a dashboard you can use directly. To publish or send messages, connect the relevant social account after setup. Using an AI agent requires additional API or MCP configuration. Setup and dashboards are currently in Japanese.
Are all four platforms available now?
You can create environments for LINE, X, Instagram and Threads. LINE is live, X and Instagram are in beta, and Threads is generally available. Features depend on the account you connect and its permissions.
YOUR NEXT SNS WORKSPACEYour next launch.
Your next launch.
With the AI you already use.
From social posts to LINE messages. Start with the platform you need, for free.
No credit card required · Ready in minutes