Buffer will stop returning data from its legacy REST endpoints on February 1, 2027. Anyone who wired a publishing workflow into the old API has to migrate to Buffer's new GraphQL API before then.
2026-07-27 · by Moe Ameen
Buffer has set a retirement date for its legacy REST API: February 1, 2027. Buffer's developer documentation states the REST API "will be retired on February 1, 2027," and that after that date requests to the legacy endpoints will no longer return data. The company directs developers to move to its new GraphQL API at developers.buffer.com and publishes a REST migration guide to walk existing integrations across. Teams with a legacy registered app keep their app credentials until the cutoff, but Buffer has stopped handing out new legacy credentials, so the old surface is closed to new builders and on a clock for everyone else.
The replacement is a rebuilt public API that Buffer opened in 2026. It's GraphQL rather than REST — Buffer's engineering framing points to strongly-typed schemas and precise field selection — and it's available on every Buffer plan, including the Free tier, with a CLI shipped alongside it. Buffer positions the new API for connecting a Buffer account to automation platforms and AI agents. There was also an earlier, narrower breaking change on the way here: on May 12, 2026, Buffer changed how media assets are submitted through the API, and mutations that use the older assets input format now fail, with a separate assets migration guide for affected integrations.
The practical upshot is a migration deadline on a live dependency. Any publishing workflow built on Buffer's old REST endpoints — custom scripts, internal dashboards, or no-code automations stitched through Zapier, Make, or n8n — needs to be rebuilt against the GraphQL API before February 1, 2027 or it stops working. Buffer's history with developer access has been uneven; it wound down an earlier public API before rebuilding the current one, which is part of why some teams are wary about re-investing engineering time into a scheduler's integration layer for the second time.
This is a good moment to notice what you were actually paying for when you piped content into Buffer through its API. In that setup Buffer is the last mile — the thing that fires a post you already made — and you owned the brittle integration between "content exists" and "content is scheduled." When the vendor deprecates that API, the migration lands on you. The way to not have this problem is to not maintain a publish-API layer at all: use an engine that generates the content and publishes it natively, so there's no third-party posting API in the middle to rewrite every time it changes.
That's the Kompozy shape. You point it at a source — a transcript, a link, a rough note — and it generates the finished set (captioned shorts, avatar video, carousels, images, posts, a blog, a newsletter) in your Persona Brief voice, then fans it out across the eight social platforms plus blog and email from its own review-and-publish pipeline. Turn on autopilot and generation, scheduling, and publishing run on a recurring basis without you assembling posts or babysitting an integration. If you're migrating off Buffer's REST API anyway, it's worth asking whether the job is to re-plumb a scheduler or to replace the whole "make it, then separately schedule it" split with one engine that does both — and keeps working when someone else's API changes.
Buffer's developer documentation gives the date as February 1, 2027 for the legacy REST API. After that date, requests to the legacy endpoints will no longer return data. Existing registered apps keep their credentials until then, but Buffer has stopped issuing new legacy app credentials, and it recommends migrating before the deadline.
A new GraphQL API at developers.buffer.com. Buffer provides a REST migration guide to move existing integrations over, ships a CLI alongside it, and makes the new API available on every plan, including Free. It's positioned for connecting Buffer to automation tools and AI agents.
No. This is a developer-facing change. If you schedule through Buffer's web or mobile apps, nothing you do changes. The retirement only affects custom code and no-code automations that call Buffer's legacy REST API directly — those need to be rebuilt against the new GraphQL API before February 1, 2027.
A separate, earlier breaking change: Buffer updated how media assets are submitted through the API, and mutations using the older "legacy assets input" format now fail. Affected integrations have to update to the current asset format, for which Buffer publishes an assets migration guide. It was an early step in the broader migration toward the new API.