Connectors · Email & messaging

Retell AI MCP server for AI agents.

actionlake is an MCP gateway: one remote MCP server that connects Claude and other MCP clients to Retell AI and the rest of your systems. It gives your agent 104 Retell AI actions (45 reads, 38 writes and 21 that wait for a confirmation) and holds the Retell AI credential itself, so the agent never does. It paces Retell AI's limits and records every call.

Connect Retell AI free See pricing

100,000 free calls a month. No card, no email, no password: press Start a free sandbox on the next screen and keep the key it shows you.

claude mcp add --transport http actionlake https://connect.actionlake.com/mcp

104actionsin one signed file
45readlook, never change
38writecreate and update
21wait for a yesdestructive, confirmed first

Set up

Connect Retell AI in three steps.

01
Add actionlake to Claude.
Run the command once in Claude Code; its consent page can create a free sandbox: 100,000 calls a month, no card. In the Claude app, add a custom connector with the URL below and paste your key on the consent page. Creating a new sandbox from the Claude app is not yet tested by us.
https://connect.actionlake.com/mcp
02
Connect Retell AI.
API key. No consent screen: your agent can connect it for you, but the key then passes through your chat. To keep it out of the model's context, paste it in the console instead. actionlake stores what you paste write-only, sealed under your tenant's key.
- api_keyRetell API key (Retell dashboard > Settings > API Keys)
```
account { op: "connections.requirements", service: "retell_ai" }
# free: exactly what to paste, and what is found for you
```

Make the first call. Check before a write.

Ask in plain words; Claude picks the action. Before anything changes, check validates the call and prices it, for free.

do    { action: "retell_ai.calls.list" }# list calls · read · 1 upstream callcheck { action: "retell_ai.phone_calls.create", input: { … } }# free: inputs, permissions, cost and confirmations, nothing sent

Retell AI at a glance

Sign-in: API key. No consent screen: your agent can connect it for you, but the key then passes through your chat. To keep it out of the model's context, paste it in the console instead.
You provide: api_key
Limits we pace to: 600 calls a minute, per connection
API covered: Retell AI API (voice and chat agents, calls, batch calls, phone numbers, LLMs, conversation flows, knowledge bases, voices, contacts, testing, apps, CRM sync) API Retell SDK 3.0.0 (2026-10-22-fc98af9)api.retellai.com
Built from: Retell AI's documentation, read 23 October 2026docs.retellai.com docs.retellai.com
Service file: Version 1.0.0, signed (Ed25519)
Cached reads: 31 of 45 reads, for up to 5 minutes; a write clears what it affects
Shared entities: 1, so ask can line Retell AI up with your other systems
Data: Processed and stored in Sydney, Australia. No US region yet

Capabilities

What an AI agent can do in Retell AI.

104 actions in 34 areas. Every one carries its effect, so a key can allow the reads and hold the rest.

45readlook, never change
38writecreate and update
21destructivewait for a confirmation

Calls
9
2 read · 4 write · 3 destructive
List calls · Get a call · Update a call's metadata · Delete a call
Agents
7
2 read · 4 write · 1 destructive
Create a voice agent · Get a voice agent · Delete a voice agent · List agents
Apps
7
4 read · 2 write · 1 destructive
Create an app · List apps · Get an app · Update an app
Chats
7
2 read · 3 write · 2 destructive
List chats · Create a chat session · Get a chat · Update a chat's metadata
Contacts
6
3 read · 2 write · 1 destructive
List contacts · Create a contact · Get a contact · Update a contact
Phone numbers
6
2 read · 2 write · 2 destructive
List phone numbers · Buy a phone number · Get a phone number · Update a phone number
Conversation flow components
5
2 read · 2 write · 1 destructive
Create a shared conversation flow component · List conversation flow components · Get a conversation flow component · Update a conversation flow component
Conversation flows
5
2 read · 2 write · 1 destructive
Create a conversation flow · List conversation flows · Get a conversation flow · Update a conversation flow

26 more areas · 52 actions

Retell LLMS 5
Test case definitions 5
Agent versions 4
Chat agents 4
Batch tests 3
Knowledge bases 3
Community voices 2
Contact analysis backfills 2
Contact imports 2
CRM config 2
CRM sync jobs 2
Phone calls 2
Test runs 2
Voices 2
Agents MCP tools 1
API key info 1
App usages 1
Batch calls 1
Chat completions 1
Concurrency 1
Contact conversations 1
CRM schema 1
Export requests 1
Knowledge base sources 1
SMS chats 1
Web calls 1

Top actions

The Retell AI API, shaped for agents.

The ids your agent types, what each does, and the one name it shares with other systems. 25 of Retell AI's 25 action names are shared with at least one other connector, so an agent learns them once.

Action	What it does	Effect	Same name in
`retell_ai.calls.list`List calls	List calls.	read	`comm.call.list`44 connectors
`retell_ai.phone_calls.create`Create an outbound phone call	Create an outbound phone call.	destructive	`comm.call.create`38 connectors
`retell_ai.contacts.list`List contacts	List contacts.	read	`crm.contact.list`177 connectors
`retell_ai.contacts.create`Create a contact	Create a contact.	write	`crm.contact.create`161 connectors
`retell_ai.sms_chats.create`Start an outbound SMS chat	Start an outbound SMS chat.	destructive	`comm.sms.send`26 connectors
`retell_ai.phone_numbers.list`List phone numbers	List phone numbers.	read	`comm.phone_number.list`23 connectors
`retell_ai.chats.list`List chats	List chats.	read	`comm.chat.list`20 connectors
`retell_ai.chats.create`Create a chat session	Create a chat session.	write	`comm.chat.create`15 connectors
`retell_ai.phone_numbers.create`Buy a phone number	Buy a phone number.	destructive	`comm.phone_number.create`11 connectors
`retell_ai.chat_completions.create`Send a message in a chat and get the agent's reply	Send a message in a chat and get the agent's reply.	write	`analytics.inference.create`17 connectors
`retell_ai.agents.create`Create a voice agent	Create a voice agent.	write	`infra.ml_agent.create`6 connectors
`retell_ai.agents.get`Get a voice agent	Get a voice agent.	read	`infra.ml_agent.get`6 connectors

Try it

Prompts to paste into Claude.

Each one names the Retell AI actions it will call, so you know what it reads and what it changes before you send it.

Readread
List calls in Retell AI and tell me what stands out.
callsretell_ai.calls.list
Writewrite
Create a contact in Retell AI. Show me exactly what you will send before you save it.
callsretell_ai.contacts.create

Governance for Retell AI

Destructive actions wait for a yes.

21 Retell AI actions are destructive. These are all of them:

Create an outbound phone callretell_ai.phone_calls.create
Delete a callretell_ai.calls.delete
Start an outbound SMS chatretell_ai.sms_chats.create
Buy a phone numberretell_ai.phone_numbers.create
Delete a contactretell_ai.contacts.delete
Delete a chatretell_ai.chats.delete
Delete a phone numberretell_ai.phone_numbers.delete
Delete a voice agentretell_ai.agents.delete
Create a batch callretell_ai.batch_calls.create
Delete an appretell_ai.apps.delete
Delete a chat agentretell_ai.chat_agents.delete
Delete a Retell LLM response engineretell_ai.retell_llms.delete
Delete an agent versionretell_ai.agent_versions.delete
Delete a knowledge baseretell_ai.knowledge_bases.delete
Delete a conversation flowretell_ai.conversation_flows.delete
Delete a test case definitionretell_ai.test_case_definitions.delete
Delete a source from a knowledge baseretell_ai.knowledge_base_sources.delete
Delete a conversation flow componentretell_ai.conversation_flow_components.delete
Take over a live call from the agentretell_ai.calls.take_over
End an ongoing chatretell_ai.chats.end
Stop an ongoing callretell_ai.calls.stop

A destructive action runs only with confirm: true. Under the human policy the agent cannot confirm for itself: the run stops until a named person approves, in the console or from a signed link in an email. The cap on a key is refused before the call is sent, never after.

doretell_ai.calls.deleteconfirm_policy: human

Delete a call?

intent: the user asked me to delete a call

run suspended · waiting for a named person · key retell-ai-agent cannot confirm itself

In the console, or from an emailed signed link.

a key for this connector

account {  op: "keys.create", name: "retell-ai-agent",  allowed_actions: ["retell_ai.*"], cap_calls: 2000,  confirm_policy: "human_for_writes",  approval_rules: [    { match: "retell_ai.phone_calls.create", approver: "[email protected]" },    { match: "retell_ai.calls.delete", approver: "[email protected]" },    { match: "retell_ai.sms_chats.create", approver: "[email protected]" }  ]}

Illustrative. Scoped to Retell AI only, capped at 2,000 upstream calls, every write confirmed, and the destructive ones approved by a named person.

Cost

What Retell AI costs on actionlake.

Every Retell AI action is one upstream call, the only thing actionlake bills. Searching, check, cost, account and any call Retell AI refused with 401, 403, 429 or a 5xx are free. Paid plans start at US$49 a month for 250,000 calls, with overage from US$0.30 down to US$0.18 per 1,000.

1upstream call per actionall 104 Retell AI actions
18actions pageeach page of a long list is one call
31reads can be cacheda cache hit costs nothing
100,000calls a month, freepaid plans from US$49 a month for 250,000

See pricing

Action index

Every Retell AI action.

104 actions by area: the id your agent calls, what it does, and its effect.

Calls9

retell_ai.calls.deleteDelete a calldestructive
retell_ai.calls.getGet a callread
retell_ai.calls.listList callsread
retell_ai.calls.listen_liveGet credentials to listen to a live callwrite
retell_ai.calls.rerun_analysisRe-run post-call analysiswrite
retell_ai.calls.stopStop an ongoing calldestructive
retell_ai.calls.take_overTake over a live call from the agentdestructive
retell_ai.calls.updateUpdate a call's metadatawrite
retell_ai.calls.update_liveUpdate a call in progresswrite

Agents7

retell_ai.agents.createCreate a voice agentwrite
retell_ai.agents.deleteDelete a voice agentdestructive
retell_ai.agents.getGet a voice agentread
retell_ai.agents.listList agentsread
retell_ai.agents.playground_completionRun a playground completion against an agentwrite
retell_ai.agents.repairRepair a voice agent's configurationwrite
retell_ai.agents.updateUpdate a voice agentwrite

Apps7

retell_ai.apps.createCreate an appwrite
retell_ai.apps.deleteDelete an appdestructive
retell_ai.apps.getGet an appread
retell_ai.apps.get_tool_schemaGet an app's tool schemaread
retell_ai.apps.listList appsread
retell_ai.apps.test_authTest an app's authenticationread
retell_ai.apps.updateUpdate an appwrite

Chats7

retell_ai.chats.createCreate a chat sessionwrite
retell_ai.chats.deleteDelete a chatdestructive
retell_ai.chats.endEnd an ongoing chatdestructive
retell_ai.chats.getGet a chatread
retell_ai.chats.listList chatsread
retell_ai.chats.rerun_analysisRe-run post-chat analysiswrite
retell_ai.chats.updateUpdate a chat's metadatawrite

Contacts6

retell_ai.contacts.createCreate a contactwrite
retell_ai.contacts.deleteDelete a contactdestructive
retell_ai.contacts.getGet a contactread
retell_ai.contacts.get_by_phoneGet a contact by phone numberread
retell_ai.contacts.listList contactsread
retell_ai.contacts.updateUpdate a contactwrite

Phone numbers6

retell_ai.phone_numbers.createBuy a phone numberdestructive
retell_ai.phone_numbers.deleteDelete a phone numberdestructive
retell_ai.phone_numbers.getGet a phone numberread
retell_ai.phone_numbers.importImport a phone number from your own telephony providerwrite
retell_ai.phone_numbers.listList phone numbersread
retell_ai.phone_numbers.updateUpdate a phone numberwrite

Conversation flow components5

retell_ai.conversation_flow_components.createCreate a shared conversation flow componentwrite
retell_ai.conversation_flow_components.deleteDelete a conversation flow componentdestructive
retell_ai.conversation_flow_components.getGet a conversation flow componentread
retell_ai.conversation_flow_components.listList conversation flow componentsread
retell_ai.conversation_flow_components.updateUpdate a conversation flow componentwrite

Conversation flows5

retell_ai.conversation_flows.createCreate a conversation flowwrite
retell_ai.conversation_flows.deleteDelete a conversation flowdestructive
retell_ai.conversation_flows.getGet a conversation flowread
retell_ai.conversation_flows.listList conversation flowsread
retell_ai.conversation_flows.updateUpdate a conversation flowwrite

Retell LLMS5

retell_ai.retell_llms.createCreate a Retell LLM response enginewrite
retell_ai.retell_llms.deleteDelete a Retell LLM response enginedestructive
retell_ai.retell_llms.getGet a Retell LLM response engineread
retell_ai.retell_llms.listList Retell LLM response enginesread
retell_ai.retell_llms.updateUpdate a Retell LLM response enginewrite

Test case definitions5

retell_ai.test_case_definitions.createCreate a test case definitionwrite
retell_ai.test_case_definitions.deleteDelete a test case definitiondestructive
retell_ai.test_case_definitions.getGet a test case definitionread
retell_ai.test_case_definitions.listList test case definitionsread
retell_ai.test_case_definitions.updateUpdate a test case definitionwrite

Agent versions4

retell_ai.agent_versions.createCreate an agent versionwrite
retell_ai.agent_versions.deleteDelete an agent versiondestructive
retell_ai.agent_versions.listList an agent's versionsread
retell_ai.agent_versions.publishPublish an agent versionwrite

Chat agents4

retell_ai.chat_agents.createCreate a chat agentwrite
retell_ai.chat_agents.deleteDelete a chat agentdestructive
retell_ai.chat_agents.getGet a chat agentread
retell_ai.chat_agents.updateUpdate a chat agentwrite

Batch tests3

retell_ai.batch_tests.createCreate a batch test runwrite
retell_ai.batch_tests.getGet a batch testread
retell_ai.batch_tests.listList batch testsread

Knowledge bases3

retell_ai.knowledge_bases.deleteDelete a knowledge basedestructive
retell_ai.knowledge_bases.getGet a knowledge baseread
retell_ai.knowledge_bases.listList knowledge basesread

Community voices2

retell_ai.community_voices.addAdd a community voice to your voiceswrite
retell_ai.community_voices.searchSearch community voicesread

Contact analysis backfills2

retell_ai.contact_analysis_backfills.createBackfill contact analysis datawrite
retell_ai.contact_analysis_backfills.getGet the contact analysis backfill job statusread

Contact imports2

retell_ai.contact_imports.createStart a contact import from an uploaded filewrite
retell_ai.contact_imports.getGet the current contact import's progressread

CRM config2

retell_ai.crm_config.getGet the CRM sync configurationread
retell_ai.crm_config.updateUpdate the CRM sync configurationwrite

CRM sync jobs2

retell_ai.crm_sync_jobs.createRun a CRM sync jobwrite
retell_ai.crm_sync_jobs.getGet the CRM sync job statusread

Phone calls2

retell_ai.phone_calls.createCreate an outbound phone calldestructive
retell_ai.phone_calls.registerRegister an inbound or custom-telephony phone callwrite

Test runs2

retell_ai.test_runs.getGet a test runread
retell_ai.test_runs.listList the test runs in a batch testread

Voices2

retell_ai.voices.getGet a voiceread
retell_ai.voices.listList voicesread

Agents MCP tools1

retell_ai.agents_mcp_tools.getGet the MCP tools available to an agentread

API key info1

retell_ai.api_key_info.getGet the API key's identity and owning orgread

App usages1

retell_ai.app_usages.listList where an app is usedread

Batch calls1

retell_ai.batch_calls.createCreate a batch calldestructive

Chat completions1

retell_ai.chat_completions.createSend a message in a chat and get the agent's replywrite

Concurrency1

retell_ai.concurrency.getGet call concurrency usage and limitsread

Contact conversations1

retell_ai.contact_conversations.listList a contact's conversationsread

CRM schema1

retell_ai.crm_schema.getGet the CRM schemaread

Export requests1

retell_ai.export_requests.listList call export requestsread

Knowledge base sources1

retell_ai.knowledge_base_sources.deleteDelete a source from a knowledge basedestructive

SMS chats1

retell_ai.sms_chats.createStart an outbound SMS chatdestructive

Web calls1

retell_ai.web_calls.createCreate a web callwrite

Questions

The Retell AI MCP server, answered.

Is there a Retell AI MCP server for Claude?

Yes. actionlake is an MCP gateway: a remote MCP server that gives Claude, or another MCP client, 104 Retell AI actions across calls, agents, apps and chats, through the same eight tools it uses for every other connector. actionlake is independent; it is not made or endorsed by Retell AI.

What do I need to connect Retell AI?

Retell API key (Retell dashboard > Settings > API Keys). The free call account { op: "connections.requirements", service: "retell_ai" } lists exactly what to paste.

Can an AI agent delete or change things in Retell AI?

Only if its key allows it, and only with an explicit confirmation. 21 Retell AI actions are destructive, including create an outbound phone call, delete a call and start an outbound SMS chat. Each runs only with confirm: true. Under the human confirm policy, or an approval rule on the key, the run waits until a named person approves it.

Will an AI agent use up my Retell AI API limit?

actionlake paces every call to the limits in the Retell AI service file: 600 calls a minute per connection. Repeated reads are answered from cache (31 Retell AI actions can be), which never reaches Retell AI.

What does a Retell AI action cost?

One upstream call, the only unit actionlake bills. A list that pages bills one call per page (18 Retell AI actions page). Cache hits, searches, dry runs and calls Retell AI refused with 401, 403, 429 or a 5xx are free. The Free plan includes 100,000 calls a month with no card. Paid plans start at US$49 a month for 250,000 calls, with overage from US$0.30 down to US$0.18 per 1,000.

Which Retell AI API does it cover?

The Retell AI API (voice and chat agents, calls, batch calls, phone numbers, LLMs, conversation flows, knowledge bases, voices, contacts, testing, apps, CRM sync) API Retell SDK 3.0.0 (2026-10-22-fc98af9) at api.retellai.com. It is built from Retell AI's documentation as read on 23 October 2026. 104 actions in 34 areas, each one in the signed service file (version 1.0.0).

Does actionlake keep my Retell AI data, and where?

actionlake processes and stores data in Sydney, Australia; there is no US region yet. Reads may be cached for up to 5 minutes, and a write clears the reads it affects. Each run's request and response is kept, sealed, for your plan's trace window: 1 day on Free, 3 days on Starter, 7 days on Pro, 14 days on Team, 30 days on Business and 30 days on Enterprise. Your Retell AI credential is sealed under your tenant's key, never logged and never returned. Your traffic is not used to train models.

Which AI clients can use it?

Claude Code, tested by us end to end, and the Claude app as a custom connector, tested by us with an existing key. Other MCP clients that support remote servers over Streamable HTTP (MCP revisions 2025-06-18 and 2025-11-25) and OAuth dynamic client registration, or a bearer header, should connect the same way; we have not tested them. Or plain REST, under the same action names.

Give your agent Retell AI today.

Connect Retell AI free See pricing

Start free - 100,000 calls/month, no card. No signup. Hard caps on every key. Cached answers are free.

Retell AI MCP server for AI agents.

Connect Retell AI in three steps.

Add actionlake to Claude.

Connect Retell AI.

Make the first call. Check before a write.

What an AI agent can do in Retell AI.

Calls

Agents

Apps

Chats

Contacts

Phone numbers

Conversation flow components

Conversation flows