What social platform APIs actually allow a tool to do, from someone who built one

When a social media tool cannot do something, there are two possible reasons, and they deserve opposite reactions. Either the tool has not built it, and you should shop around; or the platform forbids it for everyone, and shopping around only finds you a vendor more comfortable with implying otherwise. From outside, the two look identical. We build one of these tools, so we spend our days against exactly these walls; this is the map, wall by wall.

The rules that surprise people most

Reading your own history is often impossible. APIs are built for the present tense. YouTube, for instance, will tell a tool your subscriber count today, but no API returns what it was last March. Any tool showing you a history began recording it the day you connected, which is the real answer to “why does my chart start here?”

Messaging is gated separately from posting. On Meta platforms, reading and answering DMs requires permissions that each tool must individually justify in a formal review, with screencast evidence per permission. A tool that publishes to Instagram flawlessly may still be months of review away from touching your inbox. When a vendor's DM feature says “coming soon”, this review is usually what soon means.

New tools publish TikTok privately at first. TikTok audits every integration before allowing public posting: until that audit is granted, anything published through a new tool is forced to private visibility, whatever the tool's interface suggests. It is a platform rule, not a bug, and it protects you from spam integrations; it also means a young tool being honest about it is a better sign than a young tool being silent.

Reading X now costs real money. Since X's API pricing changed, every read a tool performs on your behalf (a follower count, a mention, a DM) is metered against paid tiers that the tool buys. This is why X features come with quotas in most tools, ours included, and why “unlimited X monitoring” on a cheap plan deserves a raised eyebrow: someone is paying per read, and it is not X.

Rules that protect you, dressed as annoyances

Tokens expire, and scopes are frozen at consent. The access a tool holds is exactly what you approved on the consent screen, on the day you approved it. If the tool later adds a feature needing more, you must reconnect and approve again: that reconnection prompt is the system working. Similarly, some platforms rotate credentials so a stolen token dies quickly; the cost is that a tool must occasionally ask you to reconnect an account that “was working fine”.

Posting limits are platform-side. Every network caps how often an API may publish per account per day. Tools inherit those caps and sometimes take the blame for them. If a burst of posts fails at the platform wall, no competitor would have fared differently through official means.

The word official is doing heavy lifting

Everything above describes official APIs. There exists another category of tool built on scraping and reverse-engineered private endpoints, and it can genuinely do things the official route cannot: no review queues, no permission model, no audit. The trade is that it violates the platforms' terms, breaks without notice, and puts YOUR account, not just the tool's, on the line when detected. There are legitimate uses of public-data scraping (market research on public posts, for one, which is how listening products work), but a tool that operates your logged-in account through unofficial means is gambling with your asset. Ask any vendor directly: official API or not? A clean answer exists and honest vendors give it.

How to use this when choosing a tool

Turn the walls into interview questions. Since when does my history exist in your system? Which of your Meta permissions are granted versus pending review? Is your TikTok integration audited for public posting? What are my X quotas and why? A vendor fluent in these answers has been through the walls; a vendor who answers everything with “yes, unlimited, instantly” has either built something exceptional or is describing their interface rather than the platform's rules. The platforms publish the rules; the difference between tools is mostly whether they tell you.