Integration
Connect Beehiiv and Castos
When New subscriber to publication fires in Beehiiv, your agent runs Create Private Subscriber in Castos, or New Episode in Castos to Update subscription by email in Beehiiv. 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 Beehiiv and Castos 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 Beehiiv and Castos can do together
From Beehiiv to Castos
When New subscriber to publication in Beehiiv
then Create Private Subscriber in Castos
From Castos to Beehiiv
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 Beehiiv and Castos
Triggers and actions 11 triggers · 61 actions
- List automations
poll for automations; new automations surface over time (trigger).
- List newsletter lists
poll newsletter lists; new lists surface over time (trigger).
- List polls
poll for polls; new polls surface over time (trigger).
- List segment subscriber IDs
poll subscriber IDs in a segment; new IDs surface over time (trigger).
- List segment subscribers
poll subscribers in a segment; new members surface over time (trigger).
- List tiers
poll subscription tiers; new tiers surface over time (trigger).
- New subscriber to publication
Polls Beehiiv and emits each new subscriber to the specified publication. Lists subscriptions newest-first; dedup by subscription id.
- New unsubscriber to publication
Polls Beehiiv and emits each new unsubscriber (inactive subscription) to the specified publication. Dedup by subscription id.
- Add subscription tag
add a tag to a subscription.
- Bulk create subscription
create multiple subscriptions in a single bulk request.
- Create custom field
create a new custom field.
- Create newsletter list
create a new newsletter list.
- Create segment
create a new segment.
- Create subscription
Creates a new subscriber on a publication. Sets email plus optional custom fields, UTM attribution, and referral source.
- Delete custom field
delete a custom field.
- Delete newsletter list
delete a newsletter list.
- Delete segment
delete a segment.
- Delete subscription
Remove a subscriber from a publication.
- Get aggregate stats
get aggregate statistics across posts.
- Get author
get details for a specific author.
- Get custom field
get details for a specific custom field.
- Get newsletter list
get details for a specific newsletter list.
- Get newsletter list subscription
get details for a newsletter list subscription.
- Get post
Retrieve a single post by ID. Returns content, stats, and publish status.
- Get post templates
get available post templates for a publication.
- Get publication
get details for a specific publication.
- Get publication engagements
get aggregate engagement stats for a publication.
- Get publications by subscription email
get publications associated with a subscriber email.
- Get referral program
get referral program details for a publication.
- Get segment
get details for a specific segment.
- Get subscription by email
Retrieve a single subscription by email address. Returns the subscriber's status, tier, and custom fields.
- Get subscription by ID
get details for a subscription by its ID.
- Get subscription update
get a specific bulk subscription update record.
- Identify user
get current OAuth user info.
- Identify workspace
get current workspace info.
- List authors
list all authors for a publication.
- List complimentary access
list free access grants for a publication.
- List condition sets
list all condition sets for a publication.
- List custom fields
List a publication's subscriber custom fields. Returns field names and types for mapping.
- List posts
List posts for a publication. Returns posts with status, audience, and publish metadata.
- List publications
List the publications on the account. Returns each publication's id, name, and settings — the entry point for resolving a publication id.
- List segments
List segments for a publication. Returns segment ids, names, and types for audience targeting.
- List subscriptions
List subscriptions for a publication. Returns subscribers with status, tier, and custom fields, supports filtering/pagination.
- List subscription updates
list bulk subscription update records.
- Recalculate segment
recalculate segment membership.
- Update a tier
update an existing tier.
- Update custom field
update an existing custom field.
- Update subscription by email
Update an existing subscriber identified by email. Changes tier, status, or custom fields.
- Update subscription by ID
update a subscription by its ID.
- Update subscriptions
update multiple subscriptions at once.
- Update subscriptions' status
bulk update subscription status.
- New Episode
Triggers when a new episode is added to a Castos podcast.
- New Podcast
Triggers when a new podcast is created in your Castos account.
- New Private Subscriber
Triggers when a new private subscriber is added to a Castos private podcast.
- Create Episode
Creates an episode on a Castos podcast, uploading its audio from a URL.
- Create Podcast
Creates a podcast in Castos and returns its ID.
- Create Private Subscriber
Adds a private subscriber to a Castos private podcast, giving them their own private feed.
- Delete Episode
Deletes an episode from a Castos podcast.
- Delete Podcast
Deletes a Castos podcast.
- Delete Private Subscription
Deletes a private subscriber's subscription record from a Castos private podcast.
- Find Private Subscriber by Email
Finds a Castos private subscriber by email and returns their subscriptions to your private podcasts.
- Get Episode
Returns one episode of a Castos podcast, with its title, show notes, publish date and audio file.
- Get Podcast
Returns one Castos podcast by its ID, including its title, description, RSS URL and author.
- Get Private Subscriber
Returns a Castos private subscriber by ID, with their subscriptions to your private podcasts.
- List Episodes
Returns the episodes of one Castos podcast.
- List Podcast Categories
Returns the podcast category names Castos accepts, such as "Business: Marketing".
- List Podcasts
Returns every podcast in the Castos account with its ID, title, type and whether its feed is protected.
- List Private Subscribers
Returns the private subscribers of a Castos private podcast, with each one's email, feed URL and status.
- Reactivate Private Subscriber
Reactivates a canceled private subscriber's access to a Castos private podcast, by their email.
- Revoke Private Subscriber
Cancels a private subscriber's subscription to a Castos private podcast, cutting off their private feed.
- Update Episode
Updates a Castos episode's details; only the fields you supply change.
- Update Podcast
Updates a Castos podcast's details; only the fields you supply change.
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
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Questions
Beehiiv and Castos, answered
What can start an automation from Beehiiv?
Any of Beehiiv's 8 triggers in the catalog, including New subscriber to publication, New unsubscriber to publication, List automations and List newsletter lists. Describe the moment in plain language and your agent picks the right one.
What can your agent do in Castos when something happens in Beehiiv?
Any of Castos's 18 actions, including Create Episode, Create Podcast, Create Private Subscriber and Update Episode. Your agent maps the data both ways and tests every scenario before it ships.
Can it also run from Castos to Beehiiv?
Yes. When something happens in Castos, your agent can act in Beehiiv too. This page covers both directions: Castos's triggers and Beehiiv's actions are listed here as well.
Do I have to build a connector for Beehiiv or Castos?
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 Beehiiv and Castos 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.