The best GTM tools for Claude Code

We build Harp, which is on this list, so weigh our take accordingly. Every other tool is described from its own website as of the date above.

Claude Code has become a serious place to run go-to-market work: it can read files, call tools over MCP, run CLIs and keep going on a long task. The tools below all have a real way in, either an MCP server Claude Code can connect to or a CLI it can run.

The tools

• Clay. An agent plugin with skills, MCP tools and the clay CLI for Claude Code, Codex and Cursor: search for companies and people, run enrichment routines and query tables.
• Apollo. A hosted MCP server you add to Claude Code with one command and sign in to with OAuth: search, enrichment, sequences, tasks and analytics.
• HubSpot. A remote MCP server with read and write access to CRM objects, plus a local developer MCP server.
• lemlist. An MCP server and CLI on every plan, for its outbound platform.
• OXYGEN. A CLI and a hosted MCP server for its GTM platform: CRM, tables, enrichment and sequences.
• Harp (harpgtm.com). The MCP harness for pipeline generation: your agent researches and qualifies with evidence, Harp runs email and LinkedIn sequences, sends from your own mailbox and wakes the agent to answer replies. LinkedIn runs from your real Chrome on your Mac. Runs locally next to Claude Code, Claude Desktop or Cowork. Best for: people whose own agent should run outbound end to end.

A sensible stack

One data tool (Clay or Apollo), your CRM’s server if your pipeline lives there, and one place where outbound runs. Claude Code does the reasoning across all of them; see Run outbound from Claude Code for the daily loop.