A social media data API reads information, such as posts, mentions and metrics, while a publishing API writes, creating and scheduling posts on accounts you control. Most tools need both: publishing to post and data to report results. SkedCast's REST API and MCP server do both for the accounts connected to your workspace.
Key takeaways
- A data API reads existing content and metrics; a publishing API creates and schedules new content.
- Ask "am I reading what happened, or creating what happens next?" to know which one you need.
- A tool that does both (like SkedCast) still exposes them as logically separate endpoint groups.
- Rate limits and auth scopes typically differ between the two, since the risk profile of a read is different from a write.
On this page
Social media data API vs publishing API: data (analytics) API — reading what already happened
A data API answers questions about existing content: how many people saw this post, what’s the follower growth curve, which posts got the most engagement this month. It’s read-only by definition — nothing it returns changes what’s live on the platform. Typical consumers: a reporting dashboard, a BI pipeline, a client-facing analytics view.
Publishing API — creating what happens next
A publishing API creates, schedules, edits, and cancels posts. It’s write-first: the whole point is to make something happen on the platform that wasn’t there before. Typical consumers: a scheduling tool, a bulk-import pipeline, an AI agent composing content on your behalf.
Side by side
- Data API — GET-heavy, read-only scopes, answers "what happened?"
- Publishing API — POST/PATCH/DELETE, write scopes, answers "make this happen"
- Data API rate limits are usually generous (reads are cheap); publishing APIs are tighter (writes have real-world consequences)
- A data API rarely needs Idempotency-Key; a publishing API needs it on every mutation
Where SkedCast draws this line
SkedCast’s /v1 API has both, as separate endpoint groups under one auth model: /analytics/* is the read-only data surface (workspace, account, and post-level metrics, each requiring only the analytics.read scope), and /posts, /media, /webhooks are the write/publishing surface (each requiring its own narrower scope like posts.compose). A token scoped only to analytics.read can never publish anything, by design — that separation is enforced by the scope system, not just documentation.
FAQ
- Do I need both a data API and a publishing API for my integration?
- Only if your product both creates content and reports on it. A pure analytics dashboard only needs the data/read surface; a pure scheduling tool only needs the publishing/write surface. Building an all-in-one agency tool typically needs both, scoped separately.
- Is a data API always cheaper or higher rate-limit than a publishing API?
- Generally yes — reads carry less risk than writes, so vendors typically allow a higher request volume on read-only endpoints. Check the specific vendor’s documented limits rather than assuming, since this varies.
- Does SkedCast offer a data API?
- SkedCast's API reads posts, accounts and analytics for your own connected accounts, beside its publishing endpoints.
- Do publishing APIs need app review?
- Usually yes: most networks review an app before it can publish for other people's accounts; SkedCast has handled that for each network.
- Which SkedCast plan includes API access?
- The REST API with scoped keys and signed webhooks is included from Studio; the MCP server from Solo.