A Claude Opus 5.5 social media agent is Claude Opus 5.5 connected to your actual accounts through tools, so it can publish, reply and read analytics instead of only drafting text. Creator OS provides those tools through a hosted MCP server at https://mcp.creatoros.ca/mcp, plus a REST API and a CLI. You paste one URL, sign in, and the model has around 160 tools to call.
You (prompt)
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Claude Opus 5.5
| MCP (https://mcp.creatoros.ca/mcp)
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Creator OS
|-- Instagram, TikTok, YouTube, X, Facebook, LinkedIn,
| Threads, Reddit, Discord, Slack, WhatsApp
|-- Skool communities
|-- WordPress blog, Shopify store
|-- Ads add-on (Meta, Google, TikTok, LinkedIn, X, ChatGPT)
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Posts published / comments answered / numbers back
What is a Claude Opus 5.5 social media agent?
It is a model with hands on your accounts: a prompt, a tool layer and a workspace the tools are allowed to touch.
Three parts make it work. The model reasons about what to post and what to answer. The tool layer is the MCP server, the API or the CLI. The workspace is one set of socials: 11 platforms plus Skool for one brand. An API key is pinned to one workspace, so an agent holding one key cannot post to another brand’s accounts. That boundary is what makes an agency setup with several clients safe to run from one chat window.
Opus 5.5 is the model you pick when the task needs judgment: reading a comment thread before answering, choosing a hook for a Reel, deciding whether a post is worth boosting. For a plain daily publish loop, a smaller model is often enough. There is a separate post on Opus 5.5 with social agents if you want the model comparison in more depth.
How does Claude for social media actually work without tools?
Without tools, Claude can write the caption and nothing else: it cannot see your comments, your reach or your followers.
Ask a bare chat window to “post this to Instagram” and you get a message telling you it has no access to your accounts. That is correct behaviour, not a limitation to work around with clever prompting. What a plain model does well is the writing: captions per platform, reply drafts, a month of post ideas, a description of what a Reel should show. What it cannot do is press publish, read a comment on a specific post, or tell you which of last week’s posts earned the most watch time.
The gap between the two is one connection. Everything below is about that connection.
What does the Creator OS MCP add to a Claude social media agent?
The hosted MCP server gives Claude the same publishing, inbox and analytics surface a human gets in the web app, with no code to host.
You do not run a server. You add https://mcp.creatoros.ca/mcp as a connector, sign in to Creator OS, and pick a workspace. On agency plans you make one connection per client workspace, and each connection gets its own key listed under Settings > Connected apps. Two connection modes exist: read only, where the API refuses writes, and read & write. Destructive tools such as delete post, delete comment, disconnect account and delete ad are marked so the AI app asks before running them.
What the tools cover, in the terms you would actually use:
| Job | Tool you can name in a prompt |
|---|---|
| Publish one post to several networks | create_post |
| Upload a video or image once, reuse everywhere | upload_media_from_url |
| Read results for a single post | get_post_analytics |
| Find a good posting window | get_best_time_to_post |
| Answer comments | list_comments, reply_to_comment |
| Answer DMs | list_conversations, send_message |
| Run a comment keyword funnel | create_automation |
| Check a caption fits the network | check_caption_length |
| Reach an endpoint without a named tool | platform_read, platform_request |
That last pair matters: every other Reddit, Discord, WhatsApp, Slack and store endpoint in the API reference is reachable even when no dedicated tool exists. The full list is at the MCP docs.
How to set up Claude Opus 5.5 as your social media agent (step by step)
Setup is five steps and takes minutes: connect, scope the key, install skills, run one watched post, then hand over the loop.
- Connect the server in Claude. Settings > Connectors > Add custom connector, paste
https://mcp.creatoros.ca/mcp, sign in to Creator OS, pick the workspace and choose read only or read & write. - Decide the blast radius. A read only connection is the right starting point while you test prompts. Switch to read & write when you are ready for it to publish.
- Install the skills.
npx @creatoros/cli@latest initinstalls 14 Claude Code skills. If you work in the Claude desktop app instead, skills also arrive as MCP prompts, for examplemeta-campaign-builder, and show up in the prompt menu. - Run one post with the guard rail on. Ask for a single draft first. Check the media, the platform list and the scheduled time in the app before anything goes live.
- Hand over the loop. Once one post lands correctly, give the model a standing instruction and let it work.
A prompt that works, roughly as you would type it:
Read my last 10 posts with get_post_analytics. Pick the two
topics that earned the best watch time. Write three Reels
for next week, one per topic, each under 30 seconds. Ask me
before you create anything. Then create them as drafts for
Instagram and TikTok using create_post with draft on.If you run Claude Code, the plugin route is faster: /plugin marketplace add kevinbadi/creatoros-claude-plugin, then /plugin install creatoros@creatoros and /plugin configure creatoros@creatoros with your cos_live_ key. It adds a live pane, /cos-stats and /cos-health commands, and a publish guard that asks Proceed or Cancel before anything is published, spent or deleted. The plugin needs Claude Code 2.1.287 or later. Steps are at the Claude Code plugin docs. If you prefer video, the walkthroughs are on the KevBuildsApps YouTube channel.
Which social media Claude skills should you install first?
Start with three skills that match the daily loop, then add campaign builders only when you are actually spending money.
- post-everywhere for one message across the 11 networks plus Skool, with per platform rules applied for you.
- respond-to-comments and respond-to-dms because replies are where a model saves the most time and where a bad answer costs the most.
- analytics so the agent reads numbers before it writes the next batch, instead of guessing.
The remaining installed skills are post-shortform, post-longform, post-threads, schedule-posts, automations, kairos-dashboard, ads, meta-campaign-builder, skool and blog. creatoros sync updates them later without overwriting your edits: changes land as .new files, and it also pulls the skills the Creator OS API publishes (the meta, google, tiktok and linkedin campaign builders). The list of skill names and what each does is at the agents docs.
Can a social media agent Claude publish and reply safely across accounts?
Yes, if you scope keys per workspace and mark the irreversible actions so a human confirms them.
Three controls do the work. First, an API key is pinned to one workspace, so an agent for client A cannot touch client B. On Agency plans each client workspace gets its own scoped key. Second, destructive tools are flagged and the AI app asks first: delete post, delete comment, delete automation, delete webhook, disconnect account, delete Skool post, deny Skool member, delete ad, delete blog article. Third, read only connections exist at all, so you can let an agent audit an account without any chance of a write.
One practical habit: tell the model the reply rules in the prompt. “Answer questions about shipping in the comments. Never promise a delivery date. Escalate refund requests by tagging them for me.” The agent has reply_to_comment and hide_comment, but the policy is yours to state. If you want a full worked example of the reply side, see how to build a social media agent with Claude Code.
How to measure results: analytics your Claude agent social media stack should report
Ask for the numbers that change the next post, not a dashboard tour.
Creator OS returns per post analytics, daily account metrics, follower stats and best time to post across every connected platform. For Instagram Reels there is more: get_post_analytics returns reelsSkipRate (the share of views that swiped away in the first three seconds), igReelsAvgWatchTime and igReelsVideoViewTotalTime, both in milliseconds. Meta reports these for Reels only.
A weekly prompt that closes the loop:
Pull get_post_analytics for every Reel published in the
last 7 days. Rank them by reelsSkipRate, worst first. For
the three worst, tell me the likely cause from the caption
and length. Rewrite the opening line of each and add them
to next week's drafts. Do not publish anything yet.Creator OS supplies the posting and the numbers. What the agent does with them comes from your prompt or workflow. Trackable go.creatoros.ca short links add click stats when the goal is traffic rather than watch time. The metrics reference is at the docs.
FAQ
Can Claude Opus 5.5 post to social media automatically?
Only through a tool layer. Connected to the Creator OS MCP server, Opus 5.5 can call create_post and publish to the networks in your workspace. Without that connection it can write the post but cannot send it anywhere.
What is the difference between a social agent and a social media OS?
A social agent is the model and its instructions. A social media OS is the layer that holds the account connections, applies each network’s rules, stores analytics and enforces keys and permissions. Creator OS is that second layer, and it also ships open source agents built on top of it.
Do I need Claude Code or Creator OS MCP for a social media agent claude setup?
Neither is required to start: the hosted MCP server works in the Claude apps through Settings > Connectors with nothing installed. Claude Code is the better fit if you want the plugin, the skills installed locally and the Proceed or Cancel publish guard.
Which social media Claude skills are included in Creator OS?
Fourteen, from npx @creatoros/cli@latest init: post-everywhere, post-shortform, post-longform, post-threads, schedule-posts, respond-to-comments, respond-to-dms, automations, analytics, kairos-dashboard, ads, meta-campaign-builder, skool and blog. creatoros sync keeps them current and also pulls the campaign builder skills published by the API.
How does Claude Opus 5.5 compare to Claude Sonnet 5.5 for daily posting?
Same tools, different job. Opus 5.5 suits judgment calls like choosing a hook, reading a messy comment thread or deciding what to boost. Sonnet 5.5 suits the steady daily loop of publish, reply and report. Many teams run Sonnet for the schedule and reach for Opus when something needs thinking through; the daily workflow is covered in the Sonnet 5.5 posting workflow.
Get started with Creator OS and Claude Opus 5.5
Add the connector, install the skills and let Opus 5.5 run one post end to end before you trust it with the week.
Creator OS plans start at $14.99/month for 11 platforms plus Skool, with the API, the MCP server and the CLI included. If you want the open source harness that interviews you about your brand and then posts, replies and reports on its own, start with npm start creatoros social-agents from the Social Agents repo, and see the launch video first.
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