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 publishes 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 📡 Source on GitHub

63.2/100 strong ▬ flat Agent 44/100 agent ready saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessFreemiumFree trial⚡ Free to try

1 APIs

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 2026-09-08 · rubric v0.20.0

Composite quality — 63.2/100 · strong

Contract Quality 10.4 / 25

Developer Ergonomics 17.1 / 20

Access Clarity 18.4 / 20

Operational Transparency 7.5 / 13

Contract Governance 2.2 / 12

Discoverability 7.6 / 10

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

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.

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 github.com/api-evangelist/buffer: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

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

Pricing Plans 1

Published pricing tiers and plan structures.

Buffer Plans Pricing

3 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
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
  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

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