Warmerly
The API and webhooks on the Agency plan, an MCP server on every plan; no CRM sync found.
Warmerly
Dux-Soup
One-to-one · Integrations and API
Integrations and API
One row, in depth: what each tool does, the verified numbers, and who each suits.
Dux-Soup details read from its pricing page, home page, integrations and feature pages and help centre on 22 October 2026.
Warmerly
The API and webhooks on the Agency plan, an MCP server on every plan; no CRM sync found.
Dux-Soup
Thirteen named integrations, including Salesforce, HubSpot, Pipedrive, Slack, Zapier and Make, plus an API with ten sub-APIs.
The short answer
Integrations and API, in one look.
Warmerly has an API and 16 mailbox-health webhooks on the Agency plan and an MCP server on every plan, with no CRM sync found. Dux-Soup names 13 integrations, including Salesforce, HubSpot, Pipedrive, Slack, Zapier and Make, and has an API with ten sub-APIs. Last checked 22 October 2026.
Dux-SoupDux-Soup ahead on this row
Thirteen named integrations, including Salesforce, HubSpot, Pipedrive, Slack, Zapier and Make, plus an API with ten sub-APIs.
The picture
Drawn side by side.
The ways in
From each side's own description
WarmerlyDux-Soup
Warmerly
API, Agency plan16 mailbox-health webhooksMCP server, every plan
Dux-Soup
13 named integrationsZapier and MakeAn API with ten sub-APIsA webhook article in the help centre
Dux-Soup's API article states no rate limits and no webhook events. Warmerly has no CRM sync and no Zapier or Make connector of its own that we found.
How Warmerly does it
Warmerly, in detail.
An API and 16 mailbox-health webhooks on the Agency plan, an MCP server on every plan, and connections for Gmail, Outlook, Zoho and SMTP and IMAP mailboxes. No CRM sync found.
01
An API, on the Agency plan
API keys and the API need the Agency plan ($179 a month). Keys start with wmv_, go in an X-Api-Key header to https://app.warmerly.com/api/v1, and each user can hold up to 10 active keys. The default limit is 60 requests a minute per key, adjustable from 1 to 120. Free, Starter and Growth get a 403 agency_plan_required error.
Warmerly product, checked 22 October 2026
02
16 mailbox-health webhooks
Outbound webhooks are signed POSTs about mailbox health. There are 16 event types, such as score_drop, auth_fail, dns_changed, auto_paused and aged_in. They do not cover opens, clicks or replies. Agency only, and each user can hold up to 10 subscriptions.
Warmerly product, checked 22 October 2026
03
Signed, retried deliveries
Every delivery carries an X-Warmerly-Signature header, the HMAC-SHA256 of the raw body. Each delivery is tried up to 3 times. A failed event is not redelivered later, and a subscription switches itself off after 10 consecutive sweeps in which a delivery failed.
Warmerly product, checked 22 October 2026
04
An MCP server on every plan
An MCP server at /api/mcp lets Claude, ChatGPT, Claude Code and Cursor read and act in a workspace after an OAuth 2.1 sign-in. It is on every plan including Free and needs no API key. Reads and writes share 60 calls a minute per connection, and no tool can start or resume campaign sending.
Warmerly product, checked 22 October 2026
05
Mailbox connections
Warmerly connects Gmail, Outlook, Zoho or any SMTP and IMAP mailbox, with Google and Microsoft sign-in. It also has hosted mailboxes.
Warmerly product, checked 22 October 2026
06
Rate limits are written down
The API default is 60 requests a minute per key, adjustable from 1 to 120, and the MCP server shares 60 calls a minute per connection.
Warmerly product, checked 22 October 2026
07
The MCP server cannot start sending
No MCP tool can start or resume campaign sending, so an assistant can read and prepare but not launch.
Warmerly product, checked 22 October 2026
How Dux-Soup does it
Dux-Soup, in detail.
Dux-Soup is the better connected of the two, with named CRM, chat, AI and automation connectors and an API with ten sub-APIs. Its pricing and integrations pages list them slightly differently.
01
13 named integrations
ChatGPT, Gemini, Claude, Microsoft Teams, HighLevel, SharpSpring, Zapier, Pipedrive, Slack, HubSpot, Salesforce, Freshsales and Make.
dux-soup.com/integrations · read 22 October 2026
02
Native integrations on local
The STACKED local card on its pricing page names Slack, Salesforce, Zapier and Make as native integrations; the included list further down names more.
dux-soup.com/pricing · read 22 October 2026
03
An API with ten sub-APIs
It covers LinkedIn activity, user settings, extension control, queue management, user profile, prospects, campaign management, messaging and activity, team monitoring and reporting.
support.dux-soup.com/article/227-the-dux-soup-api · read 22 October 2026
04
Who can use the API
Its article says the API is available to users with an active Turbo or Cloud licence, as well as those using STACKED.
support.dux-soup.com/article/227-the-dux-soup-api · read 22 October 2026
05
Signed requests
Calls are authenticated with an HMAC in an X-Dux-Signature header, and the timestamp must be within 5 minutes of the current time.
support.dux-soup.com/article/227-the-dux-soup-api · read 22 October 2026
06
Help articles for HubSpot, Pipedrive, Zapier and webhooks
The help centre lists articles for the HubSpot and Pipedrive CRM integrations, Zapier, the API and 'Webhook by Example'.
support.dux-soup.com · read 22 October 2026
07
Each integration has a stated job
On its integrations page, for example, Slack and Teams receive campaign responses, HubSpot runs LinkedIn automation from the CRM, Pipedrive creates and updates contacts and Make is a visual builder.
dux-soup.com/integrations · read 22 October 2026
08
The pricing page lists more native connectors
It names Slack, Salesforce, Pipedrive, HubSpot, SharpSpring, Freshsales, OpenAI, Anthropic, Microsoft Teams and HighLevel, and Zapier and Make libraries.
dux-soup.com/pricing · read 22 October 2026
09
Help articles for the connectors
The help centre lists Webhook by Example, How to add a webhook to Dux-Soup, HubSpot CRM, Pipedrive CRM and its connector installation, Zapier and Message Bridge.
support.dux-soup.com · read 22 October 2026
10
The API has a test tool
The API article points to a page that runs calls and writes curl commands, and calls are queued so they are throttled by the user's settings.
support.dux-soup.com/article/227-the-dux-soup-api · read 22 October 2026
11
Two-way sync is claimed
The home page says two-way sync with CRMs, AI tools and workplace apps. The pages we read do not state fields or direction per integration.
dux-soup.com · read 22 October 2026
What Dux-Soup does not say
We looked, and found no statement on these. That is about its published pages only, not about the product.
- Which integrations come with which plan
- Rate limits and webhook events (its API article mentions neither)
- The direction of sync for each integration
- API rate limits
- Webhook events
- Fields synced for each CRM
Where the sources disagree
We report each version rather than pick one.
- Its pricing page card names four native integrations, its included list names ten plus Zapier and Make libraries, and its integrations page names thirteen and an API. The pages do not say which come with which plan.
The numbers
Only what we could verify.
| Measure | Warmerly | Dux-Soup |
|---|---|---|
| Integrations and API | The API and webhooks on the Agency plan, an MCP server on every plan; no CRM sync found. | Thirteen named integrations, including Salesforce, HubSpot, Pipedrive, Slack, Zapier and Make, plus an API with ten sub-APIs. |
| Named integrations | 0 CRM connectors found | 13 named |
| Public API | Yes, Agency plan | Yes, ten sub-APIs |
| Webhooks | 16 mailbox-health events | A webhook article exists; events not read |
| AI tools | An MCP server on every plan | ChatGPT, Claude and Gemini for messages |
| Zapier and Make | None of our own found | Both named |
| API requests a minute | 60 a key by default, up to 120 | Not stated |
| API sub-APIs | One REST API | 10, including team monitoring and reporting |
| Named CRM connectors | None found | Salesforce, HubSpot, Pipedrive, Freshsales, SharpSpring, HighLevel |
In practice
What it means for you.
Our reading of the facts above. Not a promise, and not the only reasonable reading.
List the tools you need to connect
If your CRM is on Dux-Soup's list, that is an advantage Warmerly does not match.
Warmerly's webhooks are about mailbox health
They do not cover opens, clicks or replies.
An MCP server needs no key
Warmerly's lets Claude or ChatGPT act in a workspace after a sign-in, on every plan.
Pushing replies into a CRM
Dux-Soup names Salesforce, HubSpot and Pipedrive connectors and Zapier. Warmerly has no CRM connector, so a reply has to leave through the API on Agency or through Zapier-style tools you build yourself.
Polling the API
At 60 requests a minute a script can make 3,600 requests an hour against Warmerly's default key limit (our arithmetic). Dux-Soup's API article states no limit.
Letting an assistant help
Warmerly's MCP server lets an AI assistant read and act in the workspace but not launch sending. Dux-Soup says you can control outreach from an AI assistant and does not explain how.
Mailbox events
Warmerly's 16 webhooks tell you about mailbox health, such as score drops and failed authentication. They do not cover opens, clicks or replies.
Who it suits
Pick the one that fits.
Warmerly
Warmerly is the better fit if
- You want an MCP server for AI assistants on every plan
- You want signed mailbox-health webhooks
- You do not need a CRM connector
- You need mailbox-health webhooks
- You want an MCP server on every plan
- You want written API limits
Dux-Soup
Dux-Soup is the better fit if
- You need Salesforce, HubSpot, Pipedrive or Freshsales connectors
- You want Zapier or Make
- You want an API on a seat plan
- You need CRM, chat and automation connectors
- You want a larger API
- You want AI model choice for messages
Questions
Which integrations does Dux-Soup have?
Thirteen named on its integrations page: ChatGPT, Gemini, Claude, Microsoft Teams, HighLevel, SharpSpring, Zapier, Pipedrive, Slack, HubSpot, Salesforce, Freshsales and Make, plus an API.
Does Warmerly integrate with a CRM?
We found no CRM sync. It has an API and webhooks on the Agency plan and an MCP server on every plan.
Does Warmerly connect to HubSpot or Salesforce?
We found no connector. The API on the Agency plan is the route.
Is Dux-Soup's API open to every user?
The article says it is available to users with an active Turbo or Cloud licence, as well as those using STACKED.
Does Dux-Soup have webhooks?
The help centre lists webhook articles. We did not read them.
Sources
Dux-Soup pages were read on 22 October 2026. Plans and wording change, so check the vendor's own page before you decide. Warmerly details come from the product as it runs today.
More features
See it on your own mailbox.
Connect a mailbox. Warmerly runs alongside whatever you send from now, so you can compare before you move anything.
Free plan, no card. Paid plans: 7-day trial, first charge on day 8.