Buffer

Buffer is a social media scheduling, publishing and analytics platform with a GraphQL API for scheduling posts, managing content queues and ideas, working with post templates, accessing normalized engagement metrics, and publishing across eleven social channels including Instagram, LinkedIn, X, TikTok, Facebook, Threads, Pinterest, Bluesky, YouTube, Mastodon and Google Business Profiles. Access is by personal API key or OAuth 2.0 with PKCE, and Buffer also operates a hosted Model Context Protocol server plus a first-party CLI that ships installable agent skills. The legacy REST API is being retired on February 1, 2027.

Buffer is listed with 1 API on the APIs.io network. Tagged areas include Social Media, Scheduling, Analytics, Publishing, and Content Management.

Buffer’s developer surface includes documentation, API reference, getting-started guide, authentication, engineering blog, support, pricing, and 36 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

67.1/100 exemplar ▬ flat Agent 44/100 agent ready Front door AI 4/6 moderate Heartbeat 100/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreemiumFree trial⚡ Free to try

1 API

Social Media Scheduling Analytics Publishing Content Management Social Media Management Social Media Marketing Marketing Content Scheduling GraphQL MCP Agents

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 67.1/100 · exemplar

Contract Quality 8.4 / 21

Developer Ergonomics 14.6 / 17

Access Clarity 15.7 / 17

Operational Transparency 6.4 / 11

Contract Governance 1.9 / 10

Discoverability 6.4 / 9

Regulatory Posture 6.8 / 15

Agent readiness — 44/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 6 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 6 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

Show this score on your site.

It updates itself when the score changes. Paste this where you link to your API docs:

<a href="https://apis.io/providers/buffer/"><img src="https://apis.io/badge/buffer/card.svg" alt="Buffer on APIs.io — Kin Score by API Evangelist"></a>

Other styles, a README pill and a shields.io endpoint are on the badge page.

Raise your score.

Agent readiness — checks not met, largest first (exact, from this profile):

Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks
Documented Reversibility +6 pts — a reversal operation in the contract, graded up when a window is documented too

4 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 39.4 — up to +15.2 composite points
Contract Governance scores 18.2 — up to +9.8 composite points
Operational Transparency scores 57.9 — up to +5.5 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/buffer/apis.yml: open an issue on github.com/api-evangelist/buffer to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Social and Fediverse	builds-on	29.4	-	-
GraphQL Ecosystem (Foundation, graphql.org listings, public GraphQL APIs)	builds-on	29.4	-	-
Browser Extension Stores (company-published Firefox add-ons; Chrome Web Store unreadable)	builds-on	29.4	-	-
Raycast Store Extensions (first-party publishers + community-wrapped products)	builds-on	29.4	-	-
IFTTT Services (service publishers)	builds-on	29.4	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 5

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

GraphQL

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

Model Context Protocol (MCP)

measured — observed by APIs.io (documented)

Agent Skills

measured — observed by APIs.io (published)

OAuth 2.0 Protected Resource Metadata

measured — observed by APIs.io (verified)

Dynamic Client Registration

measured — observed by APIs.io (published)

APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

Buffer API

GraphQL API for scheduling and publishing posts, managing social media channels, handling content ideas and idea groups, post templates, and accessing normalized post metrics ac...

GraphQL 2

GraphQL schemas published by this provider.

Buffer API Reference

> Connect Buffer to your agents, automation tools, or build something entirely new.

GRAPHQL

Buffer GraphQL API

Buffer provides a GraphQL API for scheduling and publishing social media posts, managing social media channels, handling content ideas and idea groups, post templates, and acces...

GRAPHQL

Buffer API pricing

Prices published by Buffer, read 2026-10-28 from buffer.com/pricing. A free plan or tier is listed.

Plan	Price
Free	Free forever Includes: 10 scheduled posts per channel, 100 ideas, 1 user account, API access, 1 API key, 1,000 requests per
Essentials	$5/month Includes: Unlimited scheduled posts per channel, 3 API keys, 3,000 requests per channel/month, up to 30,000; $
Team	$10/month Includes: Unlimited team members, 5 API keys, 10,000 requests per channel/month, up to 100,000; $ 120 billed y

Plan details, limits and sources →

Billed by: 1 channel · FinOps profile →

Pricing Plans 2

Published pricing tiers and plan structures.

Buffer Plans Pricing

3 plans

PLANS

Buffer Price Estimates

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Buffer Rate Limits

0 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Buffer Finops

FINOPS

Security Posture 3

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Buffer Authentication

http/oauth2/openIdConnect · 3 schemes

SECURITY

Buffer Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Buffer Vulnerability Disclosure

Hackerone · contact published

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Buffer Scopes

11 scopes · authorizationCode

11 scopes

SCOPES

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

GettingStarted

SignUp

Sandbox

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

X-MCPServerCandidate

AgentSkill

LLMsTxt

WellKnown

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Lifecycle

Conformance

DataModel

Build 6

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrg

Packages

SDKs

CLI

ToolCrosswalk

Access & Security 6

Authentication, authorization, and security posture

Authentication

OAuthScopes

Compliance

Security

DomainSecurity

VulnerabilityDisclosure

VulnerabilityDisclosure

Operate 7

Status, limits, changes, and where to get help

Support

Roadmap

ChangeLog

StatusPage

Deprecation

RateLimits

ChangeLog

Scroll for all 7

Commercial 5

Pricing, plans, and the legal terms of use

Pricing

TermsOfService

PrivacyPolicy

Plans

FinOps

Company 3

The organization behind the API

Website

Website

LinkedIn

Blog

Blog

Other 1

Properties that don't map to a standard resource type

Source (apis.yml)

aid: buffer
name: Buffer
description: Buffer is a social media scheduling, publishing and analytics platform with a GraphQL API for scheduling posts,
  managing content queues and ideas, working with post templates, accessing normalized engagement metrics, and publishing
  across eleven social channels including Instagram, LinkedIn, X, TikTok, Facebook, Threads, Pinterest, Bluesky, YouTube,
  Mastodon and Google Business Profiles. Access is by personal API key or OAuth 2.0 with PKCE, and Buffer also operates a
  hosted Model Context Protocol server plus a first-party CLI that ships installable agent skills. The legacy REST API is
  being retired on February 1, 2027.
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: self-service
  trial: true
  try_now: true
  public: true
  label: Freemium
  confidence: high
  source:
  - plans
  - https://buffer.com/pricing
  - https://developers.buffer.com/explorer.html
  generated: '2026-08-13'
  method: searched
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/buffer.png
url: https://raw.githubusercontent.com/api-evangelist/buffer/refs/heads/main/apis.yml
created: '2026-06-13'
modified: '2026-08-13'
specificationVersion: '0.23'
tags:
- Social Media
- Scheduling
- Analytics
- Publishing
- Content Management
- Social Media Management
- Social Media Marketing
- Marketing
- Content Scheduling
- GraphQL
- MCP
- Agents
tags_raw:
- Social Media
- Scheduling
- Analytics
- Publishing
- Content Management
- Social Media Management
- Social Media Marketing
- Marketing
- Content Scheduling
- GraphQL
- MCP
- Agents
- Social-Media
apis:
- aid: buffer:buffer-api
  name: Buffer API
  description: GraphQL API for scheduling and publishing posts, managing social media channels, handling content ideas and
    idea groups, post templates, and accessing normalized post metrics across 11 major social media platforms.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://developers.buffer.com/
  baseURL: https://api.buffer.com/
  tags:
  - Social Media
  - Scheduling
  - GraphQL
  - Publishing
  tags_raw:
  - Social Media
  - Scheduling
  - GraphQL
  - Publishing
  - Social-Media
  properties:
  - type: Documentation
    url: https://developers.buffer.com/
  - type: APIReference
    url: https://developers.buffer.com/reference.html
  - type: GettingStarted
    url: https://developers.buffer.com/guides/getting-started.html
  - type: Authentication
    url: authentication/buffer-authentication.yml
  - type: OAuthScopes
    url: scopes/buffer-scopes.yml
  - type: GraphQL
    url: graphql/buffer-graphql.md
  - type: ErrorCatalog
    url: errors/buffer-error-codes.yml
  - type: DataModel
    url: data-model/buffer-data-model.yml
  - type: Conventions
    url: conventions/buffer-conventions.yml
  - type: RateLimits
    url: rate-limits/buffer-rate-limits.yml
  - type: Sandbox
    url: sandbox/buffer-sandbox.yml
  - type: X-MCPServerCandidate
    url: mcp/buffer-mcp.yml
    note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list
      derived from the published API contracts, not an existing server. The scorer already read the manifest and reported
      mcp_server correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
  - type: ToolCrosswalk
    url: mcp/buffer-tool-crosswalk.yml
common:
- type: Website
  url: https://buffer.com
- type: DeveloperPortal
  url: https://developers.buffer.com/
- type: Documentation
  url: https://developers.buffer.com/
- type: APIReference
  url: https://developers.buffer.com/reference.html
- type: GettingStarted
  url: https://developers.buffer.com/guides/getting-started.html
- type: Authentication
  url: authentication/buffer-authentication.yml
- type: OAuthScopes
  url: scopes/buffer-scopes.yml
- type: GitHubOrganization
  url: https://github.com/bufferapp
- type: GitHubOrg
  url: https://github.com/bufferapp
- type: LinkedIn
  url: https://www.linkedin.com/company/bufferapp
- type: X
  url: https://x.com/buffer
- type: Blog
  url: https://buffer.com/resources/
- type: Support
  url: https://support.buffer.com/
- type: Pricing
  url: https://buffer.com/pricing
- type: SignUp
  url: https://buffer.com/signup
- type: TermsOfService
  url: https://buffer.com/terms
- type: PrivacyPolicy
  url: https://buffer.com/privacy
- type: Compliance
  url: https://buffer.com/security
- type: Roadmap
  url: https://developers.buffer.com/roadmap.html
- type: ChangeLog
  url: https://developers.buffer.com/changelog.html
- type: StatusPage
  url: https://status.buffer.com/
- type: Deprecation
  url: https://developers.buffer.com/guides/api-standards.html
- type: Security
  url: https://buffer.com/security
- type: Plans
  url: plans/buffer-plans-pricing.yml
- type: RateLimits
  url: rate-limits/buffer-rate-limits.yml
- type: FinOps
  url: finops/buffer-finops.yml
- type: Packages
  url: packages/buffer-packages.yml
- type: SDKs
  url: packages/buffer-packages.yml
- type: CLI
  url: cli/buffer-cli.yml
- type: X-MCPServerCandidate
  url: mcp/buffer-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: ToolCrosswalk
  url: mcp/buffer-tool-crosswalk.yml
- type: AgentSkill
  url: skills/_index.yml
- type: LLMsTxt
  url: llms/buffer-llms.txt
- type: WellKnown
  url: well-known/buffer-well-known.yml
- type: Conventions
  url: conventions/buffer-conventions.yml
- type: ErrorCatalog
  url: errors/buffer-error-codes.yml
- type: Lifecycle
  url: lifecycle/buffer-lifecycle.yml
- type: ChangeLog
  url: changelog/buffer-changelog.yml
- type: Conformance
  url: conformance/buffer-conformance.yml
- type: DataModel
  url: data-model/buffer-data-model.yml
- type: Sandbox
  url: sandbox/buffer-sandbox.yml
- type: DomainSecurity
  url: security/buffer-domain-security.yml
- type: VulnerabilityDisclosure
  url: security/buffer-vulnerability-disclosure.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
x-enrichment:
  date: '2026-08-13'
  status: enriched
  artifacts_added: 27
  pass: local-v1

Buffer API — frequently asked questions

Does Buffer have an API?

Yes. APIs.io lists 1 API from Buffer, including Buffer API.

How do I authenticate with the Buffer API?

Buffer documents its authentication (http/oauth2/openIdConnect · 3 schemes). The details are profiled on APIs.io as Buffer Authentication.

How much does the Buffer API cost?

Buffer publishes its prices; its Free plan is Free forever as of 2026-10-28. APIs.io lists 3 pricing plans for Buffer, with each plan's price, limits and inclusions under Pricing on this page.

Is the Buffer API ready for AI agents?

Buffer has a Kin Score of 67.1 out of 100 (exemplar) and an Agent Readiness score of 44.1 (agent-ready), scored by API Evangelist on 2026-11-06.

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This provider

curl "https://apis.io/api/v1/providers/buffer"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/buffer/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/buffer/evidence"

Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.