simplywarmup

Email deliverability and warm-up infrastructure for B2B sales teams and AI agents.

CommunityOnlineAPI key requiredGlobalFreeRead-only

What it can do

  • Inboxes.Direct.Connect: Validate and store direct mailbox credentials for IMAP or POP plus SMTP connectivity.
  • Inboxes.Get: Return metrics and warmup configuration for a single tenant inbox.
  • Inboxes.Health.Get: Return the current calculated health snapshot for a single inbox.

What data it sees

Do you need an account

An API key from the service settings is required

Email deliverability and warm-up infrastructure for B2B sales teams and AI agents.

Deliverability infrastructure for modern AI sales agents and developers: curated business-inbox warmup, multi-turn LLM conversations, automated spam recovery, REST API, and hosted MCP tools.

How to connect

How to connect simplywarmup to Claude

The server address to paste into Claude settings:

https://simplywarmup--simplywarmup.run.tools

  1. Open Claude (claude.ai or the desktop app).
  2. Go to Settings → Connectors.
  3. Click Add custom connector.
  4. Paste the server address copied below into Remote MCP server URL and click Add.
  5. In a chat, click + → Connectors and switch the new connector on.

Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

Authorization

After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

How to connect simplywarmup to ChatGPT

The server address to paste into ChatGPT settings:

https://simplywarmup--simplywarmup.run.tools

  1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
  2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
  3. Open Settings → Connectors and click Create.
  4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
  5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
  6. In a new chat open + → Apps/Connectors and enable the connector.

OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

Authorization

On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

How to connect simplywarmup to Cursor

The server address to paste into Cursor settings:

https://simplywarmup--simplywarmup.run.tools

Fastest: click Open in Cursor below and confirm the prompt.

Manually:

  1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
  2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
  3. Save the file. The server appears in the MCP list; authorize it there if asked.

Authorization

If the service needs sign-in, an authorize button appears next to the server in the MCP list.

Server tool list (14)

Raw names from tools/list. Only developers need these.

inboxes.direct.connectValidate and store direct mailbox credentials for IMAP or POP plus SMTP connectivity.
inboxes.getReturn metrics and warmup configuration for a single tenant inbox.
inboxes.health.getReturn the current calculated health snapshot for a single inbox.
inboxes.listReturn the tenant inbox workspace, including fleet counts and the ordered inbox collection.
inboxes.pauseDisable warmup activity for the selected inbox.
inboxes.providers.authorize_url.getCreate an OAuth authorization session for an inbox provider and return the provider URL and state token.
inboxes.providers.connectComplete the provider OAuth callback for a tenant inbox.
inboxes.resumeRe-enable warmup activity for the selected inbox.
inboxes.warmup.get_configReturn the current warmup configuration for a single tenant inbox.
inboxes.warmup.updateUpdate the pacing and behavior rules that control how warmup runs for a single inbox.
reports.attention_required.getReturn the tenant inboxes that currently need attention first.
reports.deliverability_trend.getReturn the tenant's recent day-by-day deliverability trend.
reports.getReturn the tenant reporting overview, including summary, attention-required inboxes, and deliverability trend.
reports.summary.getReturn the tenant summary metrics for connected inboxes, email volume, health, and inboxes below the safety threshold.