Buffer

Schedule, edit and delete social posts and read post metrics from an AI agent.

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What the Buffer connector does

The Buffer MCP server connects Buffer's social scheduling to Claude and any MCP-compatible agent. Its tools list connected channels, browse the queue and drafts, schedule, edit and delete posts, capture ideas and pull post analytics — so publishing happens in the conversation. Sign-in is OAuth, or an API key for clients without it.

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Connection checked by Agentman on .

Listed in Anthropic’s Connectors Directory at community tier — a listing, not a partner-level review.

Anthropic states this reflects the level of review a connector received, not a security audit.

Buffer tools (15)

  • create_idea
  • create_post
  • delete_post
  • edit_post
  • execute_mutation
  • execute_query
  • get_account
  • get_aggregated_post_metrics
  • get_channel
  • get_post
  • introspect_schema
  • list_channels
  • list_idea_groups
  • list_ideas
  • list_posts

Tool names from Anthropic's directory listing. This server requires sign-in, so we could not read tool descriptions or parameter schemas.

Limits

  • Rate limits are per client and per plan. Buffer publishes three concurrent windows — 100 requests per 15 minutes on every plan, then 250/500 per 24 hours and 3,000/7,500/15,000 per 30 days by plan. Responses carry RateLimit headers for all three, so a client can back off before a 429.
  • Metrics lag by up to a day and some fields appear only when every channel in the filter supports them.
  • Text-only on some networks. Buffer documents Twitter, Mastodon, Threads and Bluesky as text only through this surface.
  • An edit is a whole-post replacement, not a merge — dropping a needed field fails the call.
  • You host your own media. Buffer documents that images, video and documents are referenced by URL you provide rather than uploaded through the connector.
  • We did not read tool schemas. The endpoint requires authentication, so tool names come from Anthropic's directory and behaviour from Buffer's documentation. We exercised no tool.

Frequently asked questions

Do I need a paid Buffer plan to use the MCP server?

No, but your plan sets the request budget. Buffer publishes rate limits per client by plan: Free allows one API key and 3,000 requests over 30 days, Essentials three keys and 7,500, Team five keys and 15,000. All three plans share a 100-request limit per 15 minutes, so the difference is sustained volume rather than burst speed.

Can the Buffer MCP server post to my social accounts without asking?

It can create and publish posts, and Buffer states that most MCP clients ask you to approve those calls before they run. The write tools are create_post, edit_post, delete_post, create_idea and the generic execute_mutation. Approval is a client behaviour rather than a server guarantee, so check your client prompts before connecting.

Does the Buffer MCP server use OAuth or an API key?

Both are documented, for different clients. Claude connects over OAuth with no key to copy, and we confirmed the server issues an OAuth challenge naming auth.buffer.com as its authorization server. For clients without OAuth support, Buffer documents adding the server with an Authorization Bearer header carrying a personal API key instead.

How fresh are the metrics the Buffer MCP server returns?

Up to a day behind. Buffer documents that metrics refresh once a day, so values can lag the social network by that much. Post count, reactions and comments always come back, while reach, impressions and engagement rate appear only when every channel in your filter supports them. A metrics query can span at most 365 days.

Why did my edit to a Buffer post fail?

Probably because the edit dropped a field the post needs. Buffer validates every edit as a whole post rather than merging it into the stored version, so an assistant has to read the post with get_post first and carry the current assets and metadata forward. Changing only what you asked for means preserving everything you did not.

How many tools does the Buffer MCP server have?

Anthropic's directory lists 15. Buffer's own MCP guide documents 20, the extra five being post-template tools for listing, reading, creating, updating and deleting templates. Buffer's count is the larger and more recent, so treat 15 as what Anthropic recorded rather than the server's full surface.

Sources

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