Integration
Connect Castos to Mailsoftly
When New Episode fires in Castos, your agent runs Add contact list in Mailsoftly. Describe the whole flow and it is built, tested on every scenario and kept running.
What the catalog holds today. Ask for anything missing and your agent reads the API documentation and adds it.
Build solutions, not workarounds.
What do you want Castos and Mailsoftly to do together?
Ask the assistant
Connect your AI client
Give your AI client this address.
https://mcp.apiant.aiOne connection does both: ask your client to act in an app once, or have it build an automation that keeps running. Any client that takes a remote MCP server. Nothing to install. Create your free account, then sign in once in your browser.
Set it up in your client
Claude Code
Run this in the directory you want to work in.
claude mcp add --transport http -s project apiant-ai https://mcp.apiant.aiStart Claude Code there, approve the server, and sign in in the browser page it opens.
Claude Code guide (opens in a new tab)Claude, web and desktop
Open Customize, then Connectors, then Add custom connector, and paste the address. On Team and Enterprise an owner adds it first.
Setup guide (opens in a new tab)Cursor
Add the address to your MCP configuration as a server URL. Cursor signs you in in your browser.
Setup guide (opens in a new tab)Zed
Open Settings, then AI, then MCP Servers, then Add Server, then Add Remote Server.
Setup guide (opens in a new tab)Codex and the ChatGPT desktop app
Open Settings, then MCP servers, then Add server, and choose Streamable HTTP. From the terminal, Codex takes the address with its own add command and then signs you in.
Setup guide (opens in a new tab)Grok
Open grok.com/connectors, choose New Connector, then Custom, and paste the address. Grok signs you in in your browser.
Setup guide (opens in a new tab)Any other MCP client
Paste the address where the client asks for a remote MCP server URL, and name the server apiant-ai where it lets you. APIANT's skills reach the client over the same connection.
Setup guide (opens in a new tab)Example flows
What Castos can start in Mailsoftly
When New Episode in Castos
then Add contact list in Mailsoftly
When New Podcast in Castos
then Add contact note in Mailsoftly
Starting points drawn from the triggers and actions in the catalog today. Describe the flow you need, at any depth, and your agent builds it and tests every scenario before it ships.
Everything your agent can do with Castos and Mailsoftly
Triggers and actions 3 triggers · 38 actions
Trigger
New EpisodeTriggers when a new episode is added to a Castos podcast.
Trigger
New PodcastTriggers when a new podcast is created in your Castos account.
Trigger
New Private SubscriberTriggers when a new private subscriber is added to a Castos private podcast.
Action
Create EpisodeCreates an episode on a Castos podcast, uploading its audio from a URL.
Action
Create PodcastCreates a podcast in Castos and returns its ID.
Action
Create Private SubscriberAdds a private subscriber to a Castos private podcast, giving them their own private feed.
Action
Delete EpisodeDeletes an episode from a Castos podcast.
Action
Delete PodcastDeletes a Castos podcast.
Action
Delete Private SubscriptionDeletes a private subscriber's subscription record from a Castos private podcast.
Action
Find Private Subscriber by EmailFinds a Castos private subscriber by email and returns their subscriptions to your private podcasts.
Action
Get EpisodeReturns one episode of a Castos podcast, with its title, show notes, publish date and audio file.
Action
Get PodcastReturns one Castos podcast by its ID, including its title, description, RSS URL and author.
Action
Get Private SubscriberReturns a Castos private subscriber by ID, with their subscriptions to your private podcasts.
Action
List EpisodesReturns the episodes of one Castos podcast.
Action
List Podcast CategoriesReturns the podcast category names Castos accepts, such as "Business: Marketing".
Action
List PodcastsReturns every podcast in the Castos account with its ID, title, type and whether its feed is protected.
Action
List Private SubscribersReturns the private subscribers of a Castos private podcast, with each one's email, feed URL and status.
Action
Reactivate Private SubscriberReactivates a canceled private subscriber's access to a Castos private podcast, by their email.
Action
Revoke Private SubscriberCancels a private subscriber's subscription to a Castos private podcast, cutting off their private feed.
Action
Update EpisodeUpdates a Castos episode's details; only the fields you supply change.
Action
Update PodcastUpdates a Castos podcast's details; only the fields you supply change.
Action
Add contact listCreates a new, empty contact list in Mailsoftly with the name you give it and returns the new list's id.
Action
Add contact noteWrites a plain-text note on a Mailsoftly contact, visible to the whole team on the contact record. Optionally backdates the note to when the conversation happened.
Action
Add Global UnsubscribeGlobally unsubscribes an email address from all email campaigns and newsletters in the account, creating the contact if it does not exist yet.
Action
Add or update contactCreates a new contact in Mailsoftly, or updates the existing contact with the same email address (or the given contact ID).
Action
Add Tag to ContactAdds a tag to a contact, either an existing tag or one found or created by name.
Action
Add to Contact ListAdds an existing contact to an existing contact list. If the contact is already on the list, it returns an informational message instead of an error.
Action
Add to Suppression ListAdds an email address to your Mailsoftly suppression list so no further mail from the account goes to it, creating a contact for the address if none exists.
Action
Create ContactCreates a new contact in your Mailsoftly account and returns the saved contact, including its new ID.
Action
Create TagCreates a contact tag in Mailsoftly, or returns the existing tag when one with the same name already exists.
Action
Delete contactPermanently deletes a contact from Mailsoftly, along with its list memberships, tags and activity.
Action
Find contactsReturns the contacts that exactly match the email address, first name and/or last name you supply.
Action
Get contactReturns one contact by its id, with all of its details including address, company, subscription dates and custom fields.
Action
Get Contact ActivityReturns one contact's activity timeline, newest first: list and subscription events, campaign emails with their opens and clicks, and teammate notes.
Action
Get Contact SubscriptionsReturns one contact's email subscription state: whether the address is suppressed or globally unsubscribed, and which email types the contact receives.
Action
List contact listsReturns all contact lists in your Mailsoftly account with their ids, names and contact counts.
Action
List Contacts in Contact ListReturns the contacts that belong to one contact list, with when each was added to the list.
Action
List TagsReturns every contact tag in the account with its id, name and color.
Action
Remove contact from contact listRemoves a contact from one of your Mailsoftly contact lists. The contact record and its other list memberships are left untouched.
Action
Remove Tag to ContactRemoves one or more tags from a Mailsoftly contact, by tag or by tag name. The tags stay defined on the account for other contacts.
Action
Update ContactUpdates an existing Mailsoftly contact. Only the fields you fill in are changed; everything else on the contact keeps its current value.
No trigger or action matches that. Ask your agent to add it: it reads the API documentation and builds what you describe.
Each app on its own
Reviews
What our customers say
More from Castos
Castos to HubSpotHubSpot is your all-in-one stop for all of your marketing software needs.
Castos to SalesforceSalesforce is a leading enterprise customer relationship management (CRM) platform.
Castos to SlackSlack is a messaging platform for teams. Post messages, manage channels, users, reminders, and react to...
Castos to Google SheetsGoogle Sheets is Google's online spreadsheet app for creating, editing and sharing spreadsheets.
Castos to GmailGmail is Google’s email service, featuring spam protection, search functions, and seamless integration with...
Castos to Google CalendarGoogle Calendar is a time management tool providing scheduling features, event reminders, and integration...
More into Mailsoftly
Better Stack to MailsoftlyBetter Stack is a tool to provide reliable monitoring with voice calls and beautiful on-call scheduling.
HubSpot to MailsoftlyHubSpot is your all-in-one stop for all of your marketing software needs.
Salesforce to MailsoftlySalesforce is a leading enterprise customer relationship management (CRM) platform.
Slack to MailsoftlySlack is a messaging platform for teams. Post messages, manage channels, users, reminders, and react to...
Google Sheets to MailsoftlyGoogle Sheets is Google's online spreadsheet app for creating, editing and sharing spreadsheets.
Gmail to MailsoftlyGmail is Google’s email service, featuring spam protection, search functions, and seamless integration with...
Questions
Castos and Mailsoftly, answered
What can start an automation from Castos?
Any of Castos's 3 triggers in the catalog, including New Episode, New Podcast and New Private Subscriber. Describe the moment in plain language and your agent picks the right one.
What can your agent do in Mailsoftly when something happens in Castos?
Any of Mailsoftly's 20 actions, including Create Contact, Create Tag, Update Contact and Add contact list. Your agent maps the data both ways and tests every scenario before it ships.
Can it also run from Mailsoftly to Castos?
Mailsoftly has no triggers in the catalog today, so automations start in Castos. If you need the other direction, ask: your agent reads Mailsoftly's API documentation and adds it.
Do I have to build a connector for Castos or Mailsoftly?
No. Both are in the catalog with their triggers and actions. You describe the automation; your agent builds it, tests every scenario and keeps it running.
Can my AI client use Castos and Mailsoftly without building an automation?
Yes. With your AI client connected to APIANT, ask it to do something in either app once and it runs that action on the spot. Ask for an automation and your agent builds it, tests every scenario and keeps it running. One connection covers both.
What happens when something fails?
Your agent works that out for you. It plans the failure paths along with the happy path, then tests every scenario before it ships.
Is there a free plan?
Yes. Every plan includes the agent, including free, and building from your own AI client spends no assistant credits.