LeadClaw

MCP server that gives your B2B outreach agent superpowers. LeadClaw lets your agent tap into Leadbay's rich knowledge base of companies, turning outreach activity from senseless spamming into meaningful connections.

Ask your agent for new leads, and it will pull highly qualified companies that score well against your target profile and meet your qualification criteria.

Everything is personalized—nothing to configure. Leadbay runs advanced AI agents on your website and leverages deep B2B sales expertise to optimize how leads are sourced for you.

Tell your agent which leads you want it to prospect, connect your communication channels, and it will source contacts from Leadbay and handle outreach on your behalf. Enjoy the outreach you no longer have to do.

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New to Leadbay? Create your account here before installing.

How Leadbay thinks (mental model for your agent)

• Inbox, not a database. Each day your user logs back in, a fresh batch of leads is delivered. Batch size is paced by how many leads the user has actually acted on recently — some workflows produce a big stream of smaller prospects, others a narrow stream of bigger ones. Pulling more won't produce more; acting on leads does.
• Two scoring layers. Every lead ships with a basic score (firmographic — already decent, usually correlates with AI). Roughly the top 10 of each batch are also AI-qualified (targeted web research + qualification questions → ai_agent_lead_score). Leads below the top 10 aren't worse — the system is saving resources. The agent can request deeper qualification (leadbay_bulk_qualify_leads) or contact enrichment (leadbay_enrich_titles) on any lead that looks worth it.
• Daily rhythm. The agent works best as a daily check-in: pull fresh leads, skim the auto-qualified top, deepen 1-3 promising ones, propose outreach, then log what actually got sent via leadbay_report_outreach. If your host supports scheduling, set up a daily run.

Install

No Leadbay account yet? Register here first.

Step 1 — Mint a token (required for everyone)

Requires Node.js 22+.

npx -y @leadbay/mcp@latest login --email [email protected] --region us

You'll be prompted for your password (hidden, never saved). This writes a token to your machine — you'll paste it in the next step.

Not sure of your region? Check your Leadbay dashboard URL: app-us.leadbay.app → us, app-fr.leadbay.app → fr.

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Step 2 — Connect your client

Claude Desktop

1. Download leadbay-mcp-*.dxt from the Releases page
2. Double-click it — Claude Desktop opens and asks you to confirm the install
3. Paste your token and confirm your region when prompted
4. Restart Claude Desktop, open a new chat, and try: "Show me today's leads."

Cursor / Claude Code / any other MCP client

npx -y @leadbay/mcp@latest install --email [email protected] --region us

This mints a token and registers the server into every MCP client it detects (Claude Desktop, Cursor, Claude Code), asking you per-target. You can skip Step 1 if you use this path.

Claude Code plugin marketplace

/plugin marketplace add leadbay/leadclaw
/plugin install leadbay@leadbay-leadclaw

Claude Code prompts for your token and region. Registers the MCP server and installs six skills (leadbay_daily_check_in, leadbay_research_a_domain, leadbay_import_file, leadbay_log_outreach, leadbay_qualify_top_n, leadbay_refine_audience) that auto-trigger on natural-language asks.

Tools

Read-only (always on)

Tool	Description
leadbay_pull_leads	Pull today's fresh batch of scored leads
leadbay_pull_followups	Pull leads that need follow-up action
leadbay_followups_map	Geo-clustered follow-up map for travel planning
leadbay_tour_plan	Build a visit plan for an upcoming trip
leadbay_research_lead_by_id	Deep-dive research card for a single lead
leadbay_research_lead_by_name_fuzzy	Look up a lead by company name
leadbay_prepare_outreach	Build a personalized outreach brief for a lead
leadbay_account_status	Check quota, credits, and account state
leadbay_list_campaigns	List existing campaigns
leadbay_campaign_progression	Campaign funnel metrics
leadbay_campaign_call_sheet	Call sheet for a campaign
leadbay_bulk_enrich_status	Status of a running enrichment job
leadbay_qualify_status	Status of a running qualification job
leadbay_import_status	Status of a running import job
leadbay_resolve_import_rows	Resolve import rows to lead IDs
leadbay_list_mappable_fields	List CRM fields available for mapping
leadbay_create_topup_link	Generate a Stripe top-up link (quota recovery)
leadbay_open_billing_portal	Open the billing portal

Write actions (gated by LEADBAY_MCP_WRITE=1, default ON since 0.3.0)

Tool	Description
leadbay_bulk_qualify_leads	Trigger AI qualification on a batch of leads
leadbay_enrich_titles	Enrich contact job titles
leadbay_adjust_audience	Adjust the active lens audience
leadbay_refine_prompt	Refine the qualification prompt
leadbay_answer_clarification	Answer a clarification question from Leadbay
leadbay_report_outreach	Log outreach activity (required after every contact)
leadbay_import_leads	Import a list of company domains
leadbay_import_and_qualify	Import + immediately qualify leads
leadbay_add_note	Add a note to a lead
leadbay_like_lead	Mark a lead as liked
leadbay_dislike_lead	Mark a lead as disliked
leadbay_create_campaign	Create a new campaign
leadbay_add_leads_to_campaign	Add leads to a campaign
leadbay_remove_leads_from_campaign	Remove leads from a campaign
leadbay_create_custom_field	Create a custom CRM field

Advanced granular tools (gated by LEADBAY_MCP_ADVANCED=1)

Low-level single-API-call tools for power users and integrations. Enabled by setting LEADBAY_MCP_ADVANCED=1 in the MCP server's env.

How it works

The MCP server automatically uses your active lens (the last lens you used in Leadbay). Just call leadbay_pull_leads and it works — no lens configuration needed.

leadbay_research_lead_by_id bundles multiple API calls (lead details + AI qualification + contacts) into a single response. If some data isn't available yet, it returns partial results instead of failing.

Configuration

Env var	Required	Description
LEADBAY_TOKEN	Yes	Bearer token (set by the installer)
LEADBAY_REGION	Yes	us or fr
LEADBAY_MCP_WRITE	No	Set to 0 to disable write tools (default: on)
LEADBAY_MCP_ADVANCED	No	Set to 1 to expose granular tools (default: off)
LEADBAY_API_BASE_URL	No	Override API URL (for staging/dev)

Workflows

The canonical inventory of what the MCP supports — supported / partial / planned / blocked-on-backend — is WORKFLOWS.md. Use it to triage incoming asks: find the row that matches, or add a new one. A small audit asserts every cited tool/prompt and test path is real, so the table can't silently drift.

Quick taste:

leadbay_pull_leads → leadbay_research_lead_by_id → leadbay_prepare_outreach   # discover & research
leadbay_pull_followups → leadbay_followups_map → leadbay_prepare_outreach     # travel/geo follow-ups
leadbay_import_leads → leadbay_bulk_qualify_leads                             # import & qualify

Requirements

• Node.js 22+
• A Leadbay account

Development

pnpm install
pnpm prompts:build   # .md.tmpl → generated TS
pnpm -r build        # compile everything
pnpm -r test         # must be green
pnpm -r typecheck    # must be green

Test tiers

• Unit tests (packages/core/test/unit/) — error-code mapping, tool branches. Use mockHttp from test/harness.ts to stub node:https. No network required.
• Integration tests (packages/core/test/integration/) — opt-in. Set LEADBAY_TEST_TOKEN and run pnpm test:smoke.
• Audit tests (packages/mcp/test/audit/) — assert tool descriptions, routing blocks, and WORKFLOWS.md consistency at build time. Always run on CI.
• Eval tests (packages/mcp/test/eval/) — LLM-graded scenarios. Gated by EVAL=1.

See CLAUDE.md for the full contributor guide: tool structure, test conventions, build pipeline, and how to add a new tool.

Publishing

All releases are tag-driven — never run npm publish locally. GitHub Actions owns publishing.

# 1. Bump packages/mcp/package.json#version + add CHANGELOG entry, land PR
git checkout main && git pull
git tag mcp-v0.x.0
git push origin mcp-v0.x.0
# 2. Watch the release workflow: preflight-npm → publish-mcp

For dry runs: Actions → release → "Run workflow" → package: mcp, dry_run: true.

Full runbook (token setup, failure modes, manual re-runs): RELEASE.md.