Creator OS API Automation: Queue Client Posts in 2026

Creator OS API automation means using the Creator OS REST API or the creatoros CLI to generate, queue and schedule client posts from your own tools instead of the web app. You authenticate with a cos_live_ key pinned to one workspace, send a post to /v1/posts, and Creator OS applies each platform’s rules for you.

spreadsheet / internal tool
        |
        |  POST /v1/media      -> med_ id
        |  POST /v1/posts      -> post_ id
        v
   Creator OS workspace (one set of socials)
        |
        +-- Instagram, TikTok, YouTube, X, Threads
        +-- Facebook, LinkedIn, Reddit, Discord, Slack
        |
        v
   webhooks: post.published / post.failed
        |
        v
   your dashboard, sheet or Slack channel

What Is Creator OS API Automation and What It Is Not

It is a way to drive your client’s social accounts from code you already own, not a replacement for the platforms or a license to post anything anywhere.

The API is authenticated with a Creator OS API key that starts with cos_live_. That key is pinned to a single workspace, which on Creator OS means one set of socials: one account on each of 11 platforms plus Skool. An agent holding one workspace’s key cannot post to another workspace. That is the security model, and it is the whole model. You do not manage permissions per platform inside the key. You manage workspaces.

What it is not: it is not an open posting endpoint with no platform rules. When you send a post, Creator OS applies each network’s requirements. TikTok needs its consent flags. Instagram Reels need the right content type. If you name a platform that is not connected, it comes back in missing_platforms and the rest still go out. That behavior matters for a client pipeline, because one broken connection should not kill the whole batch.

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How the Social Post API Fits Into Your Client Workflow

The post API sits at the point where an approved idea becomes a scheduled post, so your internal tool stays the source of truth and Creator OS stays the delivery layer.

The request shape is small. Here is the simple form of POST /v1/posts:

{
  "content": "Three things we changed on the landing page this week.",
  "platforms": ["linkedin", "instagram", "x"],
  "media": ["https://cdn.example.com/hero.jpg"],
  "schedule_at": "2026-03-04T14:00:00Z",
  "timezone": "America/Toronto",
  "draft": false
}

There is also an advanced form where platforms is a list of objects: { platform, account_id, options, content }. Use that when the same idea needs different captions per network, or when a client has several Pages or channels and you want account_ids to narrow the post to specific ones.

Media is uploaded once through POST /v1/media and comes back as a med_ id you can reuse on every platform. Ids across the API are typed tokens: acc_, post_, cmt_, conv_, msg_, auto_, med_, evt_, ad_, aud_. Errors share one shape: { error: { code, message, status } }. Write your retry logic against that and it will hold for every endpoint.

The base URL lives in the docs at https://www.creatoros.ca/docs. Post fields and options are at /docs/api/posts, and auth is at /docs/authentication. If you want the wider picture of what one key covers, read one API for all social networks.

Build It: Generate Posts From a Spreadsheet With the REST API

A client content calendar in a spreadsheet can become scheduled posts in four steps: upload media, build the payload, post it, and watch the event come back.

Say the agency keeps a sheet with columns for client, date, platform, caption, and image URL. A small script reads each row and does this for one row:

1. Upload the image with POST /v1/media and keep the returned med_ id.
2. Map the client column to that client’s workspace key. Never use one key for two clients.
3. Send POST /v1/posts with content, platforms, the media id, and schedule_at plus timezone.
4. Store the returned post_ id back in the sheet so the row is traceable.

Two details save hours. First, the schedule time respects the timezone you send, so a row saying “9am Tuesday” posts at 9am in the client’s zone, not yours. Second, run the same payload with draft: true on the first pass. The draft sits in Creator OS for a human to look at, and your second pass flips it to scheduled once approved.

Worked example. A row reads: client Acme, 2026-03-04, Instagram and LinkedIn, caption about a new feature, image URL. Your script uploads the image, posts to both platforms with the Acme key, and writes the post_ id to column F. If Acme’s LinkedIn connection lapsed, the response lists LinkedIn in missing_platforms, Instagram still publishes, and your sheet marks one platform as failed. You fix the connection and re-send only that platform.

Queue and Schedule Client Posts With the CLI

The CLI does the same work from a terminal, which is faster than writing a script when you are testing an idea or queuing a handful of posts by hand.

Install and check the connection first:

npx @creatoros/cli@latest init
creatoros auth:check
creatoros accounts:list

Then create a scheduled post for one or more client accounts:

creatoros posts:create \
  --text "We shipped scheduled Reels this week. Here is how it works." \
  --platforms instagram,linkedin \
  --media med_8f2c1a \
  --scheduledAt 2026-03-04T14:00:00Z \
  --timezone America/Toronto

Swap --platforms for --accounts acc_... when a client has several accounts on the same platform and you need to hit one specific Page or channel. Add --draft to park it for review. Use creatoros posts:list --status scheduled to see the queue, and creatoros posts:update <postId> --scheduledAt ... --timezone ... to move something after a client call.

For bigger batches, build a JSON calendar and run creatoros posts:bulk-upload --file calendar.json --dryRun. The dry run tells you what would be created before anything is created. Before any of it goes out, check the caption against each network’s limits with creatoros validate:post-length --text "...". Nothing is more annoying than a perfectly good X post rejected for one character.

The full command list is at /docs/cli. If you prefer scheduling from a visual scenario builder, the Make walkthrough at automate cross-posting with Make covers that route.

What to Automate and What to Keep Human in the Review Loop

Automate the mechanical steps and keep the judgment in one place: the caption and the approval.

Safe to automate end to end:

• Media upload and reuse of a med_ id across platforms.
• Timezone conversion and scheduling from a calendar.
• Fanning one approved idea into platform-specific formats, since Creator OS applies each network’s rules.
• Retry on post.failed webhooks.
• Pulling analytics back into the client dashboard.

Keep a person on:

• The final read of the caption, especially for regulated clients.
• Anything sent as a DM or a WhatsApp template. Meta bills template deliveries to the client’s own WhatsApp Business account, and every recipient has to have opted in.
• Ads. Spends and budgets stay a deliberate decision, which is why creatoros ads:create supports --validateOnly and --paused.

A simple rule: if a mistake costs money or reaches an audience outside the feed, a human approves it. If it costs a retry, automate it. There is a longer breakdown of where to draw the line in autonomous social media posting: what to automate.

How to Handle Multiple Clients, Tokens, and Approval States

One workspace per client, one key per workspace, and a status column in your tool that mirrors the Creator OS post state.

Creator OS agency plans are built for this. Agency 5 gives you 5 sets of socials (5 client workspaces, each with the 11 platforms plus Skool) for $49.99/month or $399/year. Agency 10 gives you 10 workspaces for $99/month or $599/year. Both include a scoped API key per client workspace, unlimited posts, comments and messages, and unlimited team members. A Creator Premium plan is $14.99/month or $59.99/year for one set of socials.

On the token side, the rule is dull and effective: the worker that posts for Acme only ever holds the Acme key. If you need a key that can read but not write, create a read-only key in Settings > API keys. The API refuses writes from read-only keys, so a reporting tool cannot accidentally publish.

On approval states, keep your own enum in the sheet or database and map it to Creator OS actions:

Webhook payloads are signed with X-CreatorOS-Signature, so verify it before you trust the event. Details at /docs/webhooks. The agency workflow is covered in more depth at one agent per client.

Can You Use This API for Social Analytics and Reporting

Yes, and the reporting side is the part clients actually renew on, so wire it up in the same build.

The analytics tools give you per-post analytics, daily account metrics, follower stats and best time to post across connected platforms. The CLI exposes them directly:

creatoros analytics:posts --from 2026-02-01 --to 2026-02-28 --sortBy engagement
creatoros analytics:daily --platform instagram
creatoros analytics:best-time --platform linkedin

There are also trackable go.creatoros.ca short links with click stats, so you can tie a post to actual traffic rather than just likes. A monthly client report becomes: pull daily metrics per workspace, pull top posts by engagement, pull link clicks, and write the three into one PDF. Because each client has its own key, the report job runs per client and cannot leak numbers across accounts.

If you want your own agent harness doing this on a schedule, the open-source Social Agents project runs your socials on Creator OS and reports into a local dashboard. Read Social Agents, open source and watch the build on the KevBuildsApps YouTube channel.

FAQ

How do I automate social media posts from a spreadsheet?

Read each row with a script, upload the row’s image with POST /v1/media to get a med_ id, then send POST /v1/posts with the caption, platforms, media and schedule. Use the client’s own workspace key for each row. Write the returned post_ id back into the sheet so every scheduled post traces to its row.

What is the best social post API for agencies?

Pick the one that matches how you separate clients. Creator OS pins every API key to one workspace, which is one set of socials, so a key issued for one client cannot post for another. Agency plans include a scoped key per client workspace alongside unlimited posts and team members. Compare that isolation model against whatever else you are evaluating.

Can I schedule LinkedIn posts with an API?

Yes. Send linkedin in platforms with schedule_at and timezone, or run creatoros posts:create --platforms linkedin --scheduledAt ... --timezone .... Creator OS handles text, images, video, polls, reposts and company page posts, and you can narrow the post to one Page with account_ids. Comment replies are supported; LinkedIn DMs are not.

How do I keep client posts secure with a social API?

Use one key per client workspace, store keys as secrets, and create read-only keys for anything that only reports. Creator OS refuses writes from read-only keys. Verify the X-CreatorOS-Signature header on every webhook before acting on it. Rotate a key if it ever lands somewhere it should not, such as a shared repo or a chat thread.

What is a social networking API vs a social media API?

People use the terms loosely. A social networking API usually means a single platform’s own endpoints. A social media API in this context means one layer that posts to many platforms, which is what Creator OS runs: Instagram, TikTok, YouTube, X, Threads, Facebook, LinkedIn, Reddit, Discord and Slack posts, with WhatsApp as messaging rather than posting. One key, one request shape.

Get started with Creator OS

Create an account at https://www.creatoros.ca/sign-up, connect a client workspace, and copy a cos_live_ key from Settings > API keys. Run creatoros auth:check, then send one draft post through the API before you automate the batch.

Creator OS plans start at $14.99/month for 11 platforms plus Skool, with the API, the MCP server and the CLI included. Agency 5 is $49.99/month or $399/year for five client workspaces, and Agency 10 is $99/month or $599/year for ten. New subscribers start for $0 with a free trial and can cancel anytime.

For walkthroughs of the API, the CLI and the open-source tools, watch the KevBuildsApps YouTube channel and the launch video at https://www.youtube.com/watch?v=-QBJH_PK3pY.

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