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OpenClaw + PostOnce

Publish social posts with OpenClaw

Connect your OpenClaw agent to PostOnce to publish updates, check delivery, and manage automatic crossposting from your connected accounts.

Connect OpenClaw

Requires a PostOnce account, API access, and your own API key.

See setup steps

Set up your connection

Connect OpenClaw to PostOnce

Use your own PostOnce API key.

  1. 1

    Prepare your PostOnce account

    You need API access on your plan and at least one connected social account. Create a dedicated key with accounts:read for your first check; add posts, media, or workflow scopes only for the actions you want.

    Create an API keyConnect social accountsCheck plan access
  2. 2

    Connect through OpenClaw’s native MCP registry

    Use OpenClaw 2026.9.3 with Node 24.16–24.x or 26.1+. Supply POSTONCE_API_KEY privately to the Gateway or runtime process. If a PostOnce server is already configured, inspect it before making changes; otherwise run this command from your intended agent workspace.

    Terminal · OpenClaw CLI
    openclaw mcp add postonce --url https://postonce.to/mcp --transport streamable-http --header 'Authorization=Bearer ${POSTONCE_API_KEY}' --no-probe

    Follow the client-specific instructions above. Keep your API key out of agent conversations and public files.

    Keep the single quotes: they store the environment variable reference, not your key. Restart the runtime after changing its private environment. A remote Gateway needs the key on that machine; setting it in your local terminal does not configure another host.

    Use an agent profile that permits MCP tools, such as coding or messaging. A minimal profile or explicit bundle-mcp denial hides these tools. Keep your existing approval and tool policies; this setup does not override them.

  3. 3

    Check the connection

    Run the probe to check that OpenClaw can discover PostOnce’s tools. Then start a new agent session and ask for your connected accounts. A saved configuration alone does not confirm authentication.

    Terminal · check tool discovery
    openclaw mcp probe postonce --json
    Try this prompt

    Show my connected social accounts.

    Expect account names, platforms, and IDs from list_active_accounts. Choose actual accounts before asking the agent to publish.

Read the connection documentation

From connection to first result

Start with one useful action

Find your accounts

Try this prompt

Show my connected social accounts.

Use the returned names and IDs to choose your targets. If nothing appears, connect an account in the dashboard.

Publish an update

Try this prompt

Help me publish a product update. First show my connected accounts, then ask me to choose the destinations and confirm the exact text before publishing.

After creation, ask for the post ID and each destination’s delivery status. A queued post is still waiting to publish.

Set up crossposting

Try this prompt

Show my connected accounts and the available crossposting options. Help me choose a supported source and destinations, then confirm the workflow before creating it.

A created workflow applies to future matching source posts. Inspect the workflow in PostOnce before relying on it.

Review posts in PostOnceReview crossposting workflows

Know what your agent can access

Connected accounts and scoped actions

PostOnce uses your API key’s scopes and existing account permissions. Your available destinations come from your connected accounts; media and text requirements still vary by platform.

Media needs a supported upload path

The hosted server cannot read a file path on your computer or assume access to a chat attachment. For a first media post, use a supported publicly accessible media URL and have the agent validate the selected platform’s requirements before publishing.

Media post example

Help me publish an image from a public media URL. Ask me for the URL, text, and connected destination accounts; check the platform requirements and confirm the post before creating it.

Questions before connecting

Do I need a particular PostOnce plan?

You need a plan with Public API access. Your API keys tab checks your account’s actual entitlement and shows an upgrade option when required. Connecting a client does not change your plan.

What if my agent shows no social accounts?

Connect or reconnect a social account in PostOnce, then ask the agent to list active accounts again. The API key must belong to the same PostOnce account and include accounts:read.

How do I check a failed or queued post?

Ask the agent to get the post using its returned ID and inspect each target’s status and error. Review the post in the dashboard. Check the existing result before creating another post to avoid duplicates.

How do I disconnect or replace the key?

Revoke the dedicated API key in Preferences → API keys and remove the server from your client. To reconnect, create a new key with the scopes you need and replace the old key in the client’s private configuration.

Explore more ways to connect

Google Drive

Media imports

Choose an image from Google Drive, import it into PostOnce, and review your post before scheduling.

View setup

Canva

Media imports

Import a Canva image page into PostOnce and review your post before scheduling. Direct import has limited access until Canva approves the public integration; manual export and upload remain available.

View setup

ChatGPT

AI agents

Connect ChatGPT to PostOnce to find your social accounts, prepare drafts, and publish content you approve.

View setup

Claude

AI agents

Connect Claude to PostOnce to find your social accounts, prepare drafts, and publish content you approve.

View setup

Claude Code

Coding tools

Turn a product update into social posts from your terminal. Connect Claude Code to the accounts and crossposting workflows you manage in PostOnce.

View setup

Codex

Coding tools

Ask Codex to publish your release update to connected social accounts, then inspect each destination’s result through PostOnce.

View setup

Cursor

Coding tools

Keep your product update in the editor. Use Cursor’s agent to publish through PostOnce and manage automatic crossposting between connected accounts.

View setup

Grok

AI agents

Connect Grok to PostOnce to find your social accounts, prepare image drafts, and publish posts you approve.

View setup

NanoClaw

AI agents

Connect NanoClaw to PostOnce through OneCLI to find your social accounts, prepare image drafts, and review content before publishing.

View setup

Hermes Agent

AI agents

Use Hermes Agent to publish updates through PostOnce, check delivery, and manage automatic crossposting between your connected accounts.

View setup

n8n

Workflow automation

Publish approved content from n8n to your connected social accounts. Check each destination’s result in the same workflow.

View setup

Zapier

Workflow automation

Save feed updates as PostOnce drafts with Zapier. Review the text before choosing where and when to publish.

View setup

Make

Workflow automation

Turn RSS updates into PostOnce drafts with Make. Review the text before choosing where and when to publish.

View setup

viaSocket

Workflow automation

Connect PostOnce to viaSocket workflows to react to new posts, create and manage posts, and move publishing data into the other tools you use.

View setup

Any MCP client

MCP clients

Connect an MCP-compatible agent to PostOnce to discover your social accounts, publish posts, and set up automatic crossposting.

View setup

Dropbox

Media imports

Choose an image from Dropbox, add it to your PostOnce draft, and review it before scheduling.

View setup

Your next post starts here.

Connect OpenClaw

Requires a PostOnce account, API access, and your own API key.