major

MCP connector

Server URL

https://mcp.major.build/mcpCopy

Login

OAuth

Skills

11 in the Claude listing

• Agent builderCreate and configure a Major agent — a versioned two-file bundle (agent.jsonc + prompt.md) edited on a sandbox — what each field means, how to research connectors and applications before writing the p
• App builderCreate and edit Major apps — full-stack Next.js apps with frontend, backend API routes, and a live preview — how to create or mount an app sandbox and edit through the workspace tools.
• Debug issueUse this skill when the user asks to debug, investigate, inspect for bugs, fix an issue, or says the app is broken, failing, wrong, blank, errored, or not working.
• New projectUse this skill when the user is building a brand new app for the first time.
• Skill builderCreate and manage Major agent skills — versioned file bundles (SKILL.md + references + scripts) that an attached agent loads on demand — and the sandbox-based edit/validate/save/publish lifecycle.
• Using appsUse for ANY call against a deployed Major app — listing apps the user can invoke, reading an app's skill (endpoints and request/response shapes), and issuing GET or write requests.
• Using authnImplements AuthN (identity) operations.
• Using connectorsUse for ANY operation against a connected resource or connector — databases, CRMs, email, chat, storage, ads platforms, custom REST/GraphQL APIs, remote MCP servers — and for Major platform resources
• Using frontend data tableCreates frontend table views.
• Using webhooksExplains how webhook access works on deployed Major apps and how to implement webhook endpoints.
• Workflow builderCreate and manage Major workflows — JSONC graphs of agent calls, app calls, routers, loops, joins, waits, and human approvals fired by schedules, connector events, or authenticated webhooks — the defi