Integration
Connect Call Loop 2.0 to Retell AI
When Contact Added to List fires in Call Loop 2.0, your agent runs Add Agent in Retell AI. 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 Call Loop 2.0 and Retell AI 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 Call Loop 2.0 can start in Retell AI
When Contact Added to List in Call Loop 2.0
then Add Agent in Retell AI
When Contact Created or Updated in Call Loop 2.0
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 Call Loop 2.0 and Retell AI
Triggers and actions 2 triggers · 40 actions
Trigger
Contact Added to ListTriggers when a contact is added to the selected Call Loop list.
Trigger
Contact Created or UpdatedTriggers when a contact is created or updated in Call Loop.
Action
Add listCreates a new contact list in Call Loop and returns the created list.
Action
Create (Update) ContactCreates a contact, or updates the existing contact with the same phone number, and returns the saved contact.
Action
Delete contactPermanently deletes one or more contacts by ID and returns a confirmation with the number deleted.
Action
Find contacts by search termReturns the Call Loop contacts that match a search term, optionally narrowed by status and subscription state.
Action
Get contactReturns one Call Loop contact by its ID, including its status, subscription state, lists, custom field values and messaging activity. An error occurs if the contact is not found.
Action
Get messageReturns a message's current delivery status and details, looked up by its ID or state UUID. An error occurs if the message is not found.
Action
List contactsReturns the contacts in your Call Loop organization, optionally filtered by status, search text or subscription state. Deleted contacts are not included.
Action
Send Ringless VoicemailQueues a ringless voicemail drop to a phone number using an audio file already in your Call Loop account. Returns the queued message and its delivery state.
Action
Send SMS / MMS MessageQueues one SMS or MMS message to a phone number from a number on your Call Loop account, and returns the queued message with its status.
Action
Send Voice BroadcastQueues one outbound voice call to a phone number, playing an uploaded audio file on live answer, as a voicemail, or both. Returns the queued message and its status.
Action
Update contactUpdates an existing Call Loop contact by ID, changing only the fields you fill in, and returns the saved contact.
Action
Update listRenames an existing contact list and returns the updated list.
Action
Update Opt-In StatusSets whether one contact is subscribed to text messages and to calls and ringless voicemail. No message is sent.
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
Reviews
What our customers say
More from Call Loop 2.0
Call Loop 2.0 to HubSpotHubSpot is your all-in-one stop for all of your marketing software needs.
Call Loop 2.0 to SalesforceSalesforce is a leading enterprise customer relationship management (CRM) platform.
Call Loop 2.0 to SlackSlack is a messaging platform for teams. Post messages, manage channels, users, reminders, and react to...
Call Loop 2.0 to Google SheetsGoogle Sheets is Google's online spreadsheet app for creating, editing and sharing spreadsheets.
Call Loop 2.0 to GmailGmail is Google’s email service, featuring spam protection, search functions, and seamless integration with...
Call Loop 2.0 to Google CalendarGoogle Calendar is a time management tool providing scheduling features, event reminders, and integration...
More into Retell AI
HubSpot to Retell AIHubSpot is your all-in-one stop for all of your marketing software needs.
Salesforce to Retell AISalesforce is a leading enterprise customer relationship management (CRM) platform.
Slack to Retell AISlack is a messaging platform for teams. Post messages, manage channels, users, reminders, and react to...
Google Sheets to Retell AIGoogle Sheets is Google's online spreadsheet app for creating, editing and sharing spreadsheets.
Gmail to Retell AIGmail is Google’s email service, featuring spam protection, search functions, and seamless integration with...
Google Calendar to Retell AIGoogle Calendar is a time management tool providing scheduling features, event reminders, and integration...
Questions
Call Loop 2.0 and Retell AI, answered
What can start an automation from Call Loop 2.0?
Any of Call Loop 2.0's 2 triggers in the catalog, including Contact Added to List and Contact Created or 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 Call Loop 2.0?
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 Call Loop 2.0?
Retell AI has no triggers in the catalog today, so automations start in Call Loop 2.0. 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 Call Loop 2.0 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.
Can my AI client use Call Loop 2.0 and Retell AI 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.