A public API changes what a scheduling tool actually is — instead of just a dashboard you log into, it becomes infrastructure you can build on. Here's a look at how some of the more established tools in this space handle API access, and where OneUp fits.
What "public API" should actually mean
Before comparing tools, it's worth being specific about what counts: a documented, self-serve API you can start using with an API key, not a private partner integration that requires a sales conversation to access. A lot of "API access" marketing blurs this line, so it's worth checking a tool's actual docs rather than taking a features page at face value.
Tools generally known for API access
- OneUp — a documented REST API covering scheduling, publishing, analytics, and comment replies across every supported platform, available on all plans (with some functionality gated by tier), plus an MCP server for AI-assistant connections.
- Buffer — has been building out a GraphQL API (in public beta as of early-to-mid 2026), used both for its own MCP server and available for direct integration.
- Ayrshare — positioned specifically as an API-first product for developers, rather than primarily a dashboard tool with API access as an add-on.
- Hootsuite — has a longstanding developer API used for building apps in its marketplace and connecting to automation platforms like Zapier and Make, though access has historically sat on higher business tiers.
Where this gets harder to compare cleanly
API scope varies a lot even among tools that technically have "an API" — some cover publishing only, others extend to analytics and comment management, and pricing-tier gating differs enough that two tools both claiming API access can mean very different things in practice. It's worth checking the actual documentation for scope and plan requirements before assuming feature parity based on a comparison list like this one.
What actually matters when evaluating this
Rather than "does it have an API," the more useful questions are: what does the API actually cover, what's gated by plan tier, and is there a real MCP layer on top if AI-assistant integration matters to you. Those answers vary enough between tools that they're worth checking directly rather than assuming based on brand recognition alone.
Curious what OneUp's API actually covers? Check out the documentation.