Integration
Connect Polar to Resend
When Benefit Created fires in Polar, your agent runs Add Contact to Segment in Resend. 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 Polar and Resend 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)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 Polar can start in Resend
When Benefit Created in Polar
then Add Contact to Segment in Resend
When Benefit Updated in Polar
then Create Contact in Resend
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 Polar and Resend
Triggers and actions 21 triggers · 54 actions
Trigger
Benefit CreatedTriggered when a new benefit is created in Polar.
Trigger
Benefit UpdatedTriggered when a benefit is changed in Polar.
Trigger
Checkout CreatedTriggered when a new checkout session is created in Polar.
Trigger
Checkout ExpiredTriggered when a checkout session expires in Polar without being paid.
Trigger
Checkout UpdatedTriggered when a checkout session changes in Polar, for example when it is confirmed or paid.
Trigger
Customer CreatedTriggered when a new customer is created in Polar.
Trigger
Customer DeletedTriggered when a customer is deleted in Polar.
Trigger
Customer State ChangedTriggered when a customer's state changes in Polar - their active subscriptions, granted benefits or meters.
Trigger
Customer UpdatedTriggered when a customer's details change in Polar.
Trigger
Order CreatedTriggers when a new order is placed in your Polar organization.
Trigger
Order PaidTriggers when an order in your Polar organization is paid.
Trigger
Order UpdatedTriggers when an order in your Polar organization changes.
Trigger
Product CreatedTriggers when a new product is created in your Polar organization.
Trigger
Product UpdatedTriggers when a product in your Polar organization changes.
Trigger
Subscription ActiveTriggers when a subscription in your Polar organization becomes active.
Trigger
Subscription CanceledTriggers when a customer cancels a subscription in your Polar organization.
Trigger
Subscription CreatedTriggers when a new subscription is created in your Polar organization.
Trigger
Subscription Past DueTriggers when a subscription in your Polar organization falls past due because a payment failed.
Trigger
Subscription RevokedTriggers when a subscription in your Polar organization is revoked and the customer loses access.
Trigger
Subscription UncanceledTriggers when a customer reverses a pending cancellation and keeps a subscription in your Polar organization.
Trigger
Subscription UpdatedTriggers when a subscription in your Polar organization changes.
Action
Add SubscriptionSubscribes a customer to a free recurring product.
Action
Confirm Checkout SessionCompletes an open checkout session so Polar creates the order. Works without payment only when the checkout needs none, for example a free product.
Action
Create BenefitCreates a benefit in Polar that you can attach to products.
Action
Create Checkout SessionCreates a Polar checkout session for a product and returns the link the customer pays through.
Action
Create CustomerCreates a customer in Polar.
Action
Create DiscountCreates a discount in Polar, either a percentage off or a fixed amount off.
Action
Create ProductCreates a product in Polar with its price or prices.
Action
Delete CustomerDeletes a customer in Polar. Their subscriptions are cancelled and their benefits revoked.
Action
Get Checkout SessionReturns one Polar checkout session by its id, including its status and payment link.
Action
Get CustomerReturns one customer from Polar by their id, including any metadata you stored on them.
Action
Get ProductReturns one product from Polar by its id, with its prices and attached benefits.
Action
Get SubscriptionReturns one subscription from Polar by its id, with its status, amount and current period.
Action
List BenefitsReturns a page of benefits from Polar.
Action
List Checkout SessionsReturns a page of checkout sessions from Polar.
Action
List CustomersReturns a page of customers from Polar.
Action
List DiscountsReturns the discount codes set up in your Polar organization, newest first. You can narrow the list by organization or by name text, and page through the results.
Action
List OrdersReturns the orders placed in your Polar organization. You can narrow the list by product, customer, subscription, checkout, discount or status, and page through the results.
Action
List ProductsReturns the products in your Polar organization, with their prices and benefits. You can narrow the list by name text, archived state, one-time versus subscription, or a benefit, and page through the results.
Action
List SubscriptionsReturns the subscriptions in your Polar organization. You can narrow the list by product, customer, discount, active state or status, and page through the results.
Action
Revoke SubscriptionCancels a Polar subscription immediately, ending the customer's access right away rather than at the end of the billing period.
Action
Update BenefitChanges a benefit's description, visibility, settings or metadata.
Action
Update Checkout SessionChanges an open checkout session: buyer details, product, amount, metadata or redirect links.
Action
Update CustomerUpdates an existing Polar customer. Only the fields you fill in are changed; anything left blank keeps its current value.
Action
Update OrderChanges the billing name or billing address shown on an order's invoice.
Action
Update ProductUpdates an existing Polar product. Only the fields you fill in are changed; anything left blank keeps its current value.
Action
Update SubscriptionChanges an existing Polar subscription — switch its product, apply a discount, adjust seats, move the trial end, or schedule or reverse a cancellation. Only the fields you fill in are changed.
Action
Add Contact to SegmentAdds a contact to a Resend segment. You can identify the contact by its ID or email address.
Action
Add SuppressionAdds an email address to your Resend suppression list so no further mail is sent to it.
Action
Cancel EmailCancels a scheduled Resend email that has not been sent yet.
Action
Create API KeyCreates a new Resend API key. The key itself is returned once, so store it right away.
Action
Create ContactCreates a contact in Resend. Returns the new contact's ID.
Action
Create DomainAdds a sending domain to Resend. Returns the DNS records you need to add at your domain host to verify it.
Action
Create SegmentCreates a new segment in Resend for grouping contacts.
Action
Delete API KeyDeletes a Resend API key so it can no longer be used.
Action
Delete ContactDeletes a contact from Resend. You can identify the contact by its ID or email address.
Action
Delete DomainRemoves a sending domain from Resend.
Action
Delete SegmentDeletes a segment from Resend. The contacts themselves are not deleted.
Action
List API KeysReturns the API keys on your Resend account, with each key's name and when it was last used. The key values themselves are never returned.
Action
List ContactsReturns the contacts in your Resend account, optionally limited to one segment.
Action
List DomainsReturns the sending domains on your Resend account and each one's verification status.
Action
List SegmentsReturns the contact segments in your Resend account.
Action
List Sent EmailsReturns the emails you have sent through Resend, newest first, with each email's id, sender, recipients, subject, send time and latest delivery event. Supports paging before or after a given email id.
Action
List SuppressionsReturns the email addresses on your Resend suppression list, showing for each one the address, why it was suppressed (bounce, complaint or added manually), the email that triggered it and when it was added.
Action
Remove Contact From SegmentRemoves a contact from one of your Resend segments. Identify the contact by its ID or by its email address, and name the segment to take it out of. The contact itself is not deleted.
Action
Remove SuppressionTakes an email address off your Resend suppression list so you can send to it again. Identify it by the suppression ID or by the email address itself.
Action
Retrieve ContactReturns one contact from your Resend audience, including their name, email address, whether they have unsubscribed, when they were added, and any custom properties stored on them. Look the contact up by its ID or by its email address.
Action
Retrieve DomainReturns one of your Resend sending domains, including its name, verification status, sending region, tracking settings and the DNS records it needs with each record's current status.
Action
Retrieve SegmentReturns one of your Resend segments by its ID, with the segment's name and when it was created.
Action
Retrieve Sent EmailReturns one email you sent through Resend, with its sender, recipients, subject, HTML and text body, tags, send time and latest delivery event.
Action
Send Batch EmailsSends up to 100 emails through Resend in a single call. Give it a list of emails, each with a sender, recipients, subject and body, and it returns the id of every email it created.
Action
Send EmailSends an email through Resend. Set the sender, recipients and subject, provide an HTML or plain text body, and optionally add CC/BCC, reply-to, attachments, tags or a send time.
Action
Update ContactUpdates a contact in your Resend audience. Identify the contact by ID or email address, then change the name, the subscribed/unsubscribed state, or the custom properties. Anything you leave blank stays as it is.
Action
Update EmailReschedules an email you already queued in Resend, moving it to a new send date and time. Only emails that have not gone out yet can be changed.
Action
Verify DomainAsks Resend to re-check the DNS records for one of your sending domains and start verifying it. Verification runs in the background, so the domain shows as pending until it finishes.
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
Polar and Resend, answered
What can start an automation from Polar?
Any of Polar's 21 triggers in the catalog, including Benefit Created, Benefit Updated, Checkout Created and Checkout Updated. Describe the moment in plain language and your agent picks the right one.
What can your agent do in Resend when something happens in Polar?
Any of Resend's 28 actions, including Create API Key, Create Contact, Create Domain and Create Segment. Your agent maps the data both ways and tests every scenario before it ships.
Can it also run from Resend to Polar?
Resend has no triggers in the catalog today, so automations start in Polar. If you need the other direction, ask: your agent reads Resend's API documentation and adds it.
Do I have to build a connector for Polar or Resend?
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 Polar and Resend 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.