MCP

Neither MCP tools

Save project context and retrieve it with sources in an MCP-compatible AI tool. Cursor and Claude Desktop use a local MCP server; ChatGPT uses the hosted MCP URL at https://api.neither.online/mcp.

Use the AI tool you already have

Neither works through MCP, the connection that lets your AI save and retrieve context. Choose a local guide, or connect ChatGPT with the hosted MCP URL.

Cursor guide · Claude Desktop guide · ChatGPT hosted MCP · Another MCP tool

Compatibility and prerequisites

Cursor and Claude Desktop connect with a local MCP server (stdio, Node.js 20 or later). ChatGPT connects with the hosted MCP URL https://api.neither.online/mcp in developer mode on the web. ChatGPT Pro can retrieve Neither context; saving from ChatGPT requires Business, Enterprise, or Edu developer mode. Some other HTTP-only hosts may still be unable to connect.

The npm package (@neitherai/mcp-server) uses local MCP commands (stdio). Your host must support that transport, launch the server with environment variables, and have Node.js 20 or later on the machine running it. Tools that accept only a remote MCP URL should use https://api.neither.online/mcp rather than the local package.

The generic local guide explains protocol settings; it does not claim that every AI app has been tested. You can verify your connection by saving and retrieving a note in setup.

Timeline and push tools accept metadata so future event-ledger fields map cleanly. memory_for_file returns labeled Decision, Rejected, Constraint, and Citation prose — not titles-only UUID lines.

Local MCP server configuration

Cursor and Claude Desktop use this JSON format. For another host, use the same command, arguments, and environment variables in its local MCP server settings.

{
  "mcpServers": {
    "neither": {
      "command": "npx",
      "args": ["-y", "@neitherai/mcp-server@latest"],
      "env": {
        "NEITHER_API_KEY": "sk_ctx_…",
        "NEITHER_API_BASE": "https://api.neither.online"
      }
    }
  }
}

Call Neither at delivery forks and planning writes — when choosing between approaches or aligning strategy — not on every file open or for passive archaeology.

NEITHER_API_KEY is required (sk_ctx_* from /start). NEITHER_API_BASE defaults to https://api.neither.online when omitted; this is the backend address used by the local server. ChatGPT and other remote MCP hosts should use https://api.neither.online/mcp as the MCP URL, not this local-server block.

Start free without importing a source first. Create a workspace key in setup and use it in your AI tool’s configuration.

Hosted MCP URL (ChatGPT)

ChatGPT and other remote MCP hosts that accept a Streamable HTTP URL use this endpoint, not the local npx package.

https://api.neither.online/mcp

ChatGPT Pro can retrieve Neither context; saving from ChatGPT requires Business, Enterprise, or Edu developer mode.

Connector availability

MCP cited results follow the commercial availability manifest. Live-verified Available requires fresh status evidence — scaffold stamps stay Limited. Hidden providers are not listed.

Live-verified: none yet

Limited: Microsoft, Outlook, Jira, Confluence, GitHub, Slack

Advertised: Microsoft, Outlook, Jira, Confluence, GitHub, Slack

Waitlist: Google, Gmail

Tool	Description	Inputs	Provenance fields	Status
`memory_search`	Natural-language search over workspace decision memory.	query, limit?	bc_idprovenance.source_document_id	alpha
`memory_for_file`	At delivery forks and planning writes, return cited Decision/Rejected/Constraint prose for a repo file path (hero tool for Cursor).	file_path, query?	bc_idsource_document_idprovenance.citation	alpha
`memory_timeline`	Time-ordered memory view for a topic or anchor id.	topic?, anchor_id?, limit?	occurred_atbc_idsource_idparticipants[]thread_id	alpha
`memory_push`	Close a decision or seed an ADR snippet with source id, occurred_at, participants, thread id.	text, source_id, metadata?	snippet_idmetadata.occurred_atmetadata.bc_idmetadata.thread_id	alpha
`memory_snippet_fetch`	Fetch verbatim snippet content by source_id for quoting in agent responses.	source_id	source_id	alpha