aid: b12
name: B12
description: >-
  B12 is an AI-powered website builder that generates professional websites,
  online stores, and web apps from a short prompt. Founded on a human-in-the-loop
  model and now driven by its B12 3.0 AI Agent (launched February 2026), the
  platform lets solopreneurs, consultants, freelancers, and growing teams
  describe a business idea and launch a site in minutes, then run that business
  online with built-in tools for SEO, online payments and invoicing, scheduling,
  email marketing, client intake, contact management, and contracts with
  eSignatures. B12 offers self-serve DIY plans as well as Expert plans where its
  design and content team handles setup and ongoing updates. Over 4 million
  websites have been built on B12. B12 exposes its website-generation capability
  to AI agents through a published Model Context Protocol (MCP) server, a Claude
  plugin, and a Website Generator GPT, but does not publish a general-purpose
  public REST API.
url: https://raw.githubusercontent.com/api-evangelist/b12/refs/heads/main/apis.yml
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://www.b12.io/static-assets/images/ai-website-builder.jpeg
x-type: company
x-source: vc-portfolio
x-backed-by:
- general-catalyst
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- Enterprise
- Website Builder
- AI
- No-Code
- Small Business
- Website Generation
- Model Context Protocol
- SEO
- Payments
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://www.b12.io
- type: MCPServer
  name: B12 Website Generator MCP Server
  url: mcp/b12-mcp.yml
- type: LLMsTxt
  url: llms/b12-llms.txt
- type: DomainSecurity
  url: security/b12-domain-security.yml
- type: GitHubOrganization
  url: https://github.com/b12io
- type: HelpCenter
  url: https://support.b12.io/en
- type: Support
  url: https://www.b12.io/support/
- type: Blog
  url: https://www.b12.io/resource-center/
- type: Pricing
  url: https://www.b12.io/pricing/
- type: SignUp
  url: https://b12.io/signup/
- type: TermsOfService
  url: https://www.b12.io/terms-of-service/
- type: PrivacyPolicy
  url: https://www.b12.io/privacy-policy/
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence