Buffer API - One API to publish across every social platform.
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Buffer's API lets you publish and manage content across 11 social platforms through a single endpoint. Connect it to AI assistants, no-code automation tools, or build full custom integrations. Ships with an MCP server, pre-built automation templates, a CLI, and an interactive API explorer. Available on every Buffer plan, including Free.
Replies
And if additional parameters need to be specified during publishing (for example, privacy settings), can those also be managed?
Buffer
@natalia_iankovych Hi! Each platform has its own metadata input on the createPost mutation. Reference here: developers.buffer.com/types/PostInputMetaData.html. The exact fields available vary by network (LinkedIn has first comments, Pinterest has boards, etc.).
congrats on the launch! We were a customer of buffer for our contractor teams. A few questions:
1) how would post with API effect account health for faceless/organic ugc content? We often notice substantial borderline shadow ban as we increase our usage of API posting as opposed to organic.
2) is there more unit economical way to connect 10+ accounts assuming each account at least cross post to three platforms? there're a few other alternatives that offer similar functionality that we're using and cheaper.
Buffer
@jiaodong_whatif Hey there! Everything that is posted via our API is done through Buffer, so we act as an intermediary layer between you and the network directly. There shouldn't be any penalization for this as the network wouldn't be able to differentiate posts scheduled from Buffer's UI vs. posts scheduled via Buffer's API (it's all the same once it reaches the broadcasting stage).
We're currently revisiting our pricing and packaging to make things more scalable for high-volume users like yourself! We will hopefully be able to share more news on that soon :)
The MCP server is the piece that jumps out — it means I could basically tell an assistant "queue this thread across LinkedIn and Mastodon for next week" in plain language and have it land in Buffer. The e-ink TRMNL plugin someone built in the comments is a nice proof that the read side is just as open as the publish side.
Buffer
@sounak_bhattacharya absolutely! That's exactly why we felt it was important for the MCP to be launched alongside it. Hopefully by reducing that barrier to entry, we will see a lot more people tinkering with our API!
One API for every platform is the right framing — the rate-limit and format normalization is where everyone burns weeks. Question: how are you handling platforms that change their content rules without notice (Twitter character limits, LinkedIn media specs)? Have to deal with the same kind of cross-platform output problem with StoryRoute, my interactive travel app where city-exploration stories need to render cleanly on mobile web and inside socials — the format-drift problem never really goes away.
Buffer
@samir_asadov Hey Samir! Our external API is built on top of the same schema as our internal one. Any changes that happen within our product, including any limitations from our third party partners, would then be reflected automatically in our API.
What stands out to me is the CLI + interactive API explorer — that's dev-friendly in a way most social tools aren't.
One thing I'm always curious about: when an API aggregates across platforms, who owns the credentials/keys? Does Buffer store them, or is there a way to keep things local?
(Solo dev here, building privacy-first stuff, so the data handling angle matters to me.)