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Bullpen MCP server

Bullpen is an AI sales team that works the phone. A crew of AI callers, each with its own number and voice, gets through phone trees, hold queues and AI receptionists to a real person, then drops your rep into the live call. Every call writes to Salesforce. Herman, the manager agent, runs the whole bullpen in plain language and asks before anything leaves the building.

This repository documents Bullpen's remote MCP server. There is nothing to install or host, and a new workspace starts with $10 of credits free (no card). The server runs at

https://bullpen.sale/mcp

• Transport: Streamable HTTP (stateless, JSON responses)
• Auth: OAuth 2.1 with PKCE and dynamic client registration, or a workspace API key
• Registry: sale.bullpen/bullpen in the official MCP Registry
• Site: bullpen.sale · Docs: bullpen.sale/docs · For LLMs: bullpen.sale/llms.txt

Connect

Claude (claude.ai, desktop, mobile) Settings → Connectors → Add custom connector → https://bullpen.sale/mcp. The first tool that needs your workspace sends you to bullpen.sale to sign in and click Allow.

Claude Code

claude mcp add --transport http bullpen https://bullpen.sale/mcp

Cursor, VS Code, and other MCP clients

{
  "mcpServers": {
    "bullpen": { "url": "https://bullpen.sale/mcp" }
  }
}

With an API key instead of OAuth (scripts, servers, headless agents): make a key at bullpen.sale/app/settings/api and send it as a header:

Authorization: Bearer bp_live_...

Tools

Tool	Needs sign-in	What it does
bullpen_about	no	What Bullpen is, what it costs, how an agent gets a workspace
bullpen_signup	no	Start a paid signup ($25–$500 in credits) with the Machine Payments Protocol; returns the 402 challenge
whoami	yes	Workspace, member and role the token acts as
credits_status	yes	Prepaid balance and recent usage
top_up_credits	yes	Start an MPP credit top-up ($5–$500)
ask_herman	yes	Talk to Herman, who runs the bullpen: status, companies, campaigns, sending the crew
confirm_herman_action	yes	Confirm or cancel a call, text or Salesforce update Herman proposed
ask_brain	yes	Answer from the workspace's own calls, notes and docs, with sources
find_companies	yes	Find companies to sell to, with main phone lines and websites
research_company	yes	Who to ask for at a company
get_a_human	yes	The crew dials, works the menu and hold, gets a real person, then connects you
knock	yes	Reach a human at a company's main line and leave a short hello
send_text / send_email	yes	Send from the workspace's line or agent inbox
floor_state	yes	Live and recent crew calls
create_campaign / import_campaign_contacts / work_campaign	yes	Run a calling campaign from a CSV
watch_companies	yes	Watch companies for buying and risk signals
onboarding_status	yes	What's left before every feature works, in order, with the tool or link for each
turn_on_herman	yes	Switch Herman on
get_outbound_agreement / accept_outbound_agreement	yes	Read the compliance agreement; accept with the person's typed name, only after they agree
search_numbers / buy_number	yes	Find a line and buy it from credits ($3/month); a crew member goes on it
hire_crew	yes	Put AI crew members on any free lines
get_team_profile / draft_team_profile / set_team_profile	yes	Teach the crew who they work for: name as spoken, product names, tone, house rules, the knock line (drafted from the website; admin saves)
set_campaign_customs	yes	Make one campaign sound different from the team default
rename_crew_member	yes	Rename a crew member for your culture or region (paid workspaces)
set_mobile	yes	The phone that rings when the crew reaches a person (yours, or a teammate's)
buy_credits	yes	Card checkout link for credits
connect_salesforce / connect_google	yes	Approval links the person opens
invite_teammate / list_team	yes	Invite by email; see members and pending invites
open_page	no	Links into the app, including floor to watch live calls

Every tool carries a title and readOnlyHint / destructiveHint / openWorldHint annotations.

Onboard from your agent

Your agent can take a new workspace all the way to live calls. Ask it to run onboarding_status and work the list: switch Herman on, read you the compliance agreement and record your yes, buy a crew line from credits, set your mobile, teach the crew who they work for (drafted from your website, saved only when you approve), invite your team. It hands you links for the few steps that happen in your browser (card checkout, Salesforce and Google approval) and a link to the live floor whenever you want to watch.

Agents can hire a bullpen

An agent with a wallet can sign its principal up with no checkout page:

POST https://bullpen.sale/pay/signup?amount=25
Content-Type: application/json

{"owner_email": "[email protected]", "company": "Your Co", "agent_name": "your agent"}

1. The first request returns 402 with an MPP WWW-Authenticate: Payment … challenge (cards via Stripe Shared Payment Tokens).
2. Pay and retry with Authorization: Payment ….
3. The response carries api_key, org_id and balance_cents.

Payable endpoints are described with x-payment-info in bullpen.sale/openapi.json. An agent can also attach an AP2 mandate (X-AP2-Mandate) to prove its principal authorized the spend; Bullpen checks every hop's limits and signs a receipt verifiable at /pay/ap2/jwks.

Guardrails

• A person stands behind outbound. Research, Herman, the brain, company search and campaigns work right away. Calls and texts unlock only after a workspace admin accepts the Outbound Compliance Agreement and adds a phone number.
• Herman asks first. Anything that reaches the outside world comes back as a pending action; nothing goes out until it's confirmed.
• Calling rules: company lines only unless the person gave written consent, calling hours in the callee's time zone, opt-outs honored, and the crew says it's an AI when asked.
• Permissions: a token acts as the member who approved it, in that workspace, with that member's role. It can't buy numbers, change billing, connect accounts or invite people. Revoke it any time in Settings → API keys.

Pricing

Usage-based, prepaid credits: $0.30 per crew minute (no extra charge for reaching a human), $0.03 per text, $3/month per number. New workspaces get $10 of credits free, no card — a phone number and about 20 minutes of crew calls. Spending tools return a 402 error at zero. Full table: bullpen.sale/pricing.

Other ways in

• A2A: Herman is an A2A agent. Card at /.well-known/agent-card.json, JSON-RPC at https://bullpen.sale/a2a.
• REST API + CLI: one POST endpoint, every action documented at bullpen.sale/docs. curl -fsSL https://bullpen.sale/install.sh | sh

Discovery documents

Path	What
/.well-known/oauth-protected-resource/mcp	OAuth protected resource metadata (RFC 9728)
/.well-known/oauth-authorization-server	Authorization server metadata (RFC 8414)
/.well-known/mcp/server-card.json	MCP server card
/.well-known/agent-card.json	A2A agent card
/openapi.json	OpenAPI 3.1 with MPP x-payment-info
/llms.txt	Summary for language models

Support

[email protected] · bullpen.sale · Privacy · Terms

Bullpen is built by RoseGlass Corp.