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What do you want Polar and Retell AI to do together?
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Connect your AI client
Give your AI client this address.
https://mcp.apiant.aiAny 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 Retell AI
When Benefit Created in Polar
then Add Agent in Retell AI
When Benefit Updated in Polar
then Create Knowledge Base in Retell AI
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 Retell AI
Triggers and actions 21 triggers · 53 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 AgentCreate a new Retell AI voice agent attached to a response engine (Retell LLM, custom LLM, or conversation flow) and a voice.
Action
Create Knowledge BaseCreate a new Retell AI knowledge base from texts, URLs and/or a file.
Action
Create Retell LLMCreate a new Retell LLM Response Engine that can be attached to an agent. This is used to generate response output for the agent.
Action
Delete AgentDeletes an existing Retell AI agent, including all of its versions.
Action
Delete Knowledge BaseDelete an existing knowledge base.
Action
Delete Phone NumberDelete a phone number from your Retell AI account.
Action
Delete Retell LLMDelete a Retell LLM response engine.
Action
Get a CallRetrieves the full details of a Retell AI call (phone or web): status, transcript, recording links, post-call analysis, cost and latency.
Action
Get an AgentRetrieve the full configuration of a Retell AI voice agent.
Action
Get a Phone NumberRetrieve the details of one phone number in your Retell AI account, including its bound agents, nickname and webhook settings.
Action
Get a Retell LLMRetrieve the details of a Retell LLM response engine, including its prompt, model, tools and states.
Action
Get a VoiceRetrieve the details of a single Retell AI voice: its name, provider, accent, gender, age and a preview audio link.
Action
Get ConcurrencyGets your Retell AI organization's current number of ongoing calls and its concurrency limits.
Action
Get Knowledge BaseRetrieve the details of a knowledge base, including its processing status and sources.
Action
Import Phone NumberImport a phone number from your own telephony provider (for example a Twilio elastic SIP trunk) into Retell AI and optionally bind agents to it.
Action
List AgentsLists the voice and chat agents in the Retell AI account, optionally filtered by channel or by a name/id search.
Action
List CallsList calls in the Retell AI account, newest first by default, optionally filtered by agent, status, direction, numbers, time range and more. Returns up to 1000 calls; transcripts and recording URLs are not included (use Get a Call for those).
Action
List Knowledge BasesList all knowledge bases in the Retell AI account.
Action
List Phone NumbersLists the phone numbers in your Retell AI account (up to 1000).
Action
List Retell LLMsLists the Retell LLM response engines in the account.
Action
List VoicesList all voices available to the Retell AI account.
Action
Make a Phone CallStart a new outbound phone call from one of your Retell numbers, handled by a Retell voice agent.
Action
Register Phone CallRegister a phone call placed through your own (custom) telephony, so Retell issues a call id your telephony can connect the audio to.
Action
Update AgentUpdates an existing Retell AI voice agent's latest draft version. Only the fields you fill in are changed.
Action
Update CallUpdate the metadata, data storage setting or custom attributes of an existing Retell AI call.
Action
Update Phone NumberUpdates the agents, nickname, webhooks, country restrictions, SIP trunk and fallback settings of a phone number in Retell AI. Only the fields you fill in are changed.
Action
Update Retell LLMUpdate an existing Retell LLM response engine's configuration (prompt, model, etc).
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 Retell AI, 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 Retell AI when something happens in Polar?
Any of Retell AI's 27 actions, including Create Knowledge Base, Create Retell LLM, Update Agent and Update Call. Your agent maps the data both ways and tests every scenario before it ships.
Can it also run from Retell AI to Polar?
Retell AI has no triggers in the catalog today, so automations start in Polar. If you need the other direction, ask: your agent reads Retell AI's API documentation and adds it.
Do I have to build a connector for Polar or Retell AI?
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.
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.