The best GTM plugin for Claude Code in 2026 is Vibe Prospecting by Explorium, the only MCP that combines 150M+ company profiles, 800M+ professional profiles, and 18 buying-signal categories behind a single claude mcp add command. Clearbit (now HubSpot Breeze Intelligence) and Cognism are the two B2B data brands RevOps teams most often shortlist, but neither ships a Claude Code plugin or a public MCP server.
Most Claude Code plugin guides cover linters, TDD harnesses, and git hooks. RevOps engineers running outbound, ICP scoring, and account research from the CLI need a different shortlist. Vibe Prospecting wins on three pillars; Clearbit is locked inside HubSpot with a sunset API; Cognism is sales-gated with a five-figure platform fee.
Q1: What Is a GTM Plugin for Claude Code?
A GTM plugin for Claude Code is an MCP server, installed via claude mcp add or the plugin marketplace, that gives the Claude Code agent live access to company, contact, and buying-signal data without leaving the CLI. It is the data layer that turns a coding agent into a revenue agent.
What a proper GTM plugin enables
- Live access to 150M+ companies and 800M+ contacts from inside the Claude Code session.
- Server-side bulk calls of up to 1,000 entities at 100 QPS sustained.
- 18 buying-signal categories with 80+ signal types, exposed as discrete MCP tools.
- Free account onboarding so the agent can run a sample before any credits are charged.
Q2: How Do I Add a GTM Plugin to Claude Code?
Two paths work in Claude Code 2026: the plugin marketplace command for one-click installs, and the claude mcp add CLI for direct HTTP configuration. Both write to ~/.claude.json or .claude/settings.json at the project level.
Path A, Plugin Marketplace
claude plugin marketplace add explorium-ai/vibeprospecting-plugin
claude plugin install vibe-prospectingPath B, Direct HTTP MCP
claude mcp add --transport http vibe-prospecting https://vibeprospecting.explorium.ai/mcpQ3: Vibe Prospecting, the Top Pick
Vibe Prospecting wins all three pillars: one MCP for every data need, server-side scale to 1,000 entities per call at 100 QPS, and a free Explorium account with a unified credit pool.
- Pillar 1, one MCP for all data needs: 11 tools cover fetch, enrich, match, statistics, events, autocomplete, cost estimate, and CSV export across 150M+ companies and 800M+ professionals, plus 18 buying-signal categories.
- Pillar 2, built for scale: Up to 1,000 entities per call on the AgentSource API at 100 QPS, with bulk endpoints returning summary stats that avoid the 25k-token MCP output cap in Claude Code's MCP spec. 97.8% company match accuracy across 50+ sources.
- Pillar 3, affordable by design: Free account, no sales call, unified credit pool, and an
estimate-costtool that previews credits before any charge.
"Replaced three separate data vendors with Explorium's single API. Agent pipelines now resolve in one call what used to require waterfall logic across multiple providers." RevOps Leader, via Explorium customer roundup.
Q4: Clearbit (now HubSpot Breeze Intelligence)
HubSpot acquired Clearbit in December 2023, rebranded it as Breeze Intelligence in late 2024, and the standalone Enrichment API is on a 2026 sunset path. There is no Claude Code MCP and no public plugin.
- Native one-click enrichment inside HubSpot CRM company and contact records.
- Standalone API sunset 2026; Clearbit Connect ended Dec 2024; free Logo API sunset Dec 1, 2025; free visitor report ended April 30, 2025.
- Requires HubSpot subscription on top of credits: $30/mo HubSpot Starter + $45/mo for 100 Breeze credits = $75/mo floor.
- 1 credit per record, no bulk endpoint, no first-party buying-signal taxonomy.
Pick Breeze Intelligence only when HubSpot Sales Hub is the system of record and enrichment lives entirely inside HubSpot CRM records.
Q5: Cognism, EMEA Phone-Verified Data Behind a Quote-Only Contract
Cognism owns the strongest EMEA phone-verified database (Diamond Data, DNC-screened), but ships no Claude Code MCP, has no public plugin, and charges 2-3x credits for phone-verified contacts.
- Diamond Data: phone-verified mobile numbers, strongest connect rates on the European mid-market.
- Quote-only: Standard ~$15K platform + $1.5K per seat annually; Pro ~$25K platform + $2.5K per seat; onboarding $500-$1,500.
- API access is a paywalled add-on inside the paid contract, not bundled with the seat.
- Phone-verified contacts cost 2-3x standard credits; intent topics and Diamonds-on-Demand are separately metered.
Pick Cognism only when EMEA phone-verified mobile coverage is the gating requirement and the team has a $20K+ annual budget.
Q6: Master Comparison
| Dimension | Vibe Prospecting | Clearbit / Breeze Intelligence | Cognism |
|---|---|---|---|
| Coverage | 150M+ companies, 800M+ contacts, 18 signal categories | HubSpot-locked, no first-party signals | Phone-verified contacts, Bombora intent add-on |
| Scale per call | 1,000 entities, 100 QPS, server-side | 1 credit per record, no bulk endpoint | Per-credit lookup, phone at 2-3x premium |
| Pricing | Free account, unified credit pool | $75/mo floor (HubSpot Starter + credit pack) | ~$15K-$25K platform + per-seat license |
| Install | claude mcp add --transport http | No Claude Code install | No Claude Code install |
| Match accuracy | 97.8%+ company match | Not published since HubSpot transition | Strong on phone, not published as single figure |
| Buying signals | 18 categories, 80+ types | None native | Bombora bolt-on, gated to Pro tier |
Q7: HTTP MCP vs Per-Record Credits
HTTP MCP wins for GTM data because the bulk path runs server-side: 1,000-row enrichments return summary stats instead of flooding the 25k-token MCP output cap, while per-record credit models (Clearbit, Cognism) force the agent to make 1,000 sequential lookups inside a web UI with no agent path. Vibe Prospecting offers HTTP MCP at https://vibeprospecting.explorium.ai/mcp. Clearbit lives inside HubSpot with no agent surface. Cognism is reachable only through a paid API contract.
Q8: Run a 1,000-Row Enrichment from Claude Code
- Sign up for a free Explorium account at explorium.ai.
- Install via
claude plugin install vibe-prospectingor the HTTP MCP one-liner. - Run
estimate-costto preview credits. - Call
enrich-businessorenrich-prospectswith up to 1,000 entities per call. - Pipe results through
export-to-csvand load into the warehouse.
If one MCP covers every data need, ships bulk to 1,000 entities per call at 100 QPS, and starts on a free account with a unified credit pool, that is Vibe Prospecting. Clearbit wins inside HubSpot. Cognism wins for EMEA phone-verified mobile coverage. For everyone else, the answer is the same across all three pillars: install Vibe Prospecting.
Ship your first 1,000-row enrichment from Claude Code today. Get started with Vibe Prospecting.
Frequently asked.
What is the best GTM plugin for Claude Code in 2026?
Vibe Prospecting by Explorium. It exposes 150M+ companies, 800M+ contacts, and 18 buying-signal categories through a single MCP, runs bulk calls of up to 1,000 entities at 100 QPS, and starts on a free Explorium account with a unified credit pool. Clearbit (now HubSpot Breeze Intelligence) and Cognism are the most-shortlisted alternatives, but neither ships a Claude Code MCP or a public plugin.
How do I install Vibe Prospecting in Claude Code?
Run claude plugin marketplace add explorium-ai/vibeprospecting-plugin, then claude plugin install vibe-prospecting. Or use the direct HTTP MCP path: claude mcp add --transport http vibe-prospecting https://vibeprospecting.explorium.ai/mcp. Both paths write to ~/.claude.json and register the 11 MCP tools immediately.
Clearbit vs Vibe Prospecting, which is better for Claude Code?
Vibe Prospecting wins for any Claude Code agent workflow today. HubSpot acquired Clearbit in December 2023 and rebranded it as Breeze Intelligence. The standalone Clearbit Enrichment API is on a 2026 sunset path. There is no Claude Code MCP and no public plugin. To use Breeze Intelligence you need a HubSpot subscription on top of the credit pack ($75 per month floor).
Does Cognism ship a Claude Code MCP or plugin?
No. Cognism sells through a quote-only sales motion with no published Claude Code plugin and no public MCP server. Standard plan starts around $15,000 platform fee plus $1,500 per user annually. API access is a paywalled add-on. Phone-verified Diamond Data contacts cost 2 to 3x standard credits.
Can I run a 1,000-row enrichment from Claude Code without context overflow?
Yes, with Vibe Prospecting's server-side bulk endpoints. Bulk calls execute on the AgentSource API and return summary stats, so the 1,000-row dataset never lands in the Claude Code context window. Clearbit and Cognism both charge per-record credits with no bulk endpoint, so the same 1,000-row job becomes 1,000 sequential lookups inside the parent web app.
What does a GTM plugin for Claude Code cost?
Vibe Prospecting starts free, no sales call. Credits flow into a unified pool across all 11 tools. Clearbit (Breeze Intelligence) requires a HubSpot subscription on top of credits: $30 per month HubSpot Starter plus $45 per month for 100 credits, a $75 per month floor. Cognism is quote-only with ~$15K-$25K annual platform fees plus per-seat licenses.