---
title: "Retell AI MCP server for AI agents - actionlake"
description: "Give Claude 104 Retell AI actions through one MCP server: calls, agents, apps, chats. Your agent never holds the credential. 100,000 calls a month free."
canonical: https://actionlake.com/connectors/retell-ai
updated: 2026-10-23
---

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](https://actionlake.com/console?start=sandbox) [See pricing](https://actionlake.com/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`

the first call

```
do {
  action: "retell_ai.calls.list",
  intent: "check which Retell AI account is connected"
}
# List calls · read · 1 upstream call
```

- 104 actions in one signed file
- 45 read look, never change
- 38 write create and update
- 21 wait for a yes destructive, confirmed first

Set up

## Connect Retell AI in three steps.

1. 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`
2. 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_key` Retell 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
   ```
3. 03
   ### 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 call
   check { 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 2026[docs.retellai.com](https://docs.retellai.com/openapi.yaml) [docs.retellai.com](https://docs.retellai.com/api-references/create-agent)

**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.

- **45** read look, never change
- **38** write create and update
- **21** destructive wait for a confirmation

1. ### Calls
   9
   2 read · 4 write · 3 destructive
   List calls · Get a call · Update a call's metadata · Delete a call
2. ### Agents
   7
   2 read · 4 write · 1 destructive
   Create a voice agent · Get a voice agent · Delete a voice agent · List agents
3. ### Apps
   7
   4 read · 2 write · 1 destructive
   Create an app · List apps · Get an app · Update an app
4. ### Chats
   7
   2 read · 3 write · 2 destructive
   List chats · Create a chat session · Get a chat · Update a chat's metadata
5. ### Contacts
   6
   3 read · 2 write · 1 destructive
   List contacts · Create a contact · Get a contact · Update a contact
6. ### Phone numbers
   6
   2 read · 2 write · 2 destructive
   List phone numbers · Buy a phone number · Get a phone number · Update a phone number
7. ### 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
8. ### 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.

1. Read read
   List calls in Retell AI and tell me what stands out.
   calls `retell_ai.calls.list`
2. Write write
   Create a contact in Retell AI. Show me exactly what you will send before you save it.
   calls `retell_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 call `retell_ai.phone_calls.create`
- Delete a call `retell_ai.calls.delete`
- Start an outbound SMS chat `retell_ai.sms_chats.create`
- Buy a phone number `retell_ai.phone_numbers.create`
- Delete a contact `retell_ai.contacts.delete`
- Delete a chat `retell_ai.chats.delete`
- Delete a phone number `retell_ai.phone_numbers.delete`
- Delete a voice agent `retell_ai.agents.delete`
- Create a batch call `retell_ai.batch_calls.create`
- Delete an app `retell_ai.apps.delete`
- Delete a chat agent `retell_ai.chat_agents.delete`
- Delete a Retell LLM response engine `retell_ai.retell_llms.delete`
- Delete an agent version `retell_ai.agent_versions.delete`
- Delete a knowledge base `retell_ai.knowledge_bases.delete`
- Delete a conversation flow `retell_ai.conversation_flows.delete`
- Delete a test case definition `retell_ai.test_case_definitions.delete`
- Delete a source from a knowledge base `retell_ai.knowledge_base_sources.delete`
- Delete a conversation flow component `retell_ai.conversation_flow_components.delete`
- Take over a live call from the agent `retell_ai.calls.take_over`
- End an ongoing chat `retell_ai.chats.end`
- Stop an ongoing call `retell_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.

do retell_ai.calls.delete confirm_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: "lead@example.com" },
    { match: "retell_ai.calls.delete", approver: "lead@example.com" },
    { match: "retell_ai.sms_chats.create", approver: "lead@example.com" }
  ]
}
```

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.

- 1 upstream call per action all 104 Retell AI actions
- 18 actions page each page of a long list is one call
- 31 reads can be cached a cache hit costs nothing
- 100,000 calls a month, free paid plans from US$49 a month for 250,000

[See pricing](https://actionlake.com/pricing)

Action index

## Every Retell AI action.

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

**Calls 9**

- `retell_ai.calls.delete` Delete a call destructive
- `retell_ai.calls.get` Get a call read
- `retell_ai.calls.list` List calls read
- `retell_ai.calls.listen_live` Get credentials to listen to a live call write
- `retell_ai.calls.rerun_analysis` Re-run post-call analysis write
- `retell_ai.calls.stop` Stop an ongoing call destructive
- `retell_ai.calls.take_over` Take over a live call from the agent destructive
- `retell_ai.calls.update` Update a call's metadata write
- `retell_ai.calls.update_live` Update a call in progress write

**Agents 7**

- `retell_ai.agents.create` Create a voice agent write
- `retell_ai.agents.delete` Delete a voice agent destructive
- `retell_ai.agents.get` Get a voice agent read
- `retell_ai.agents.list` List agents read
- `retell_ai.agents.playground_completion` Run a playground completion against an agent write
- `retell_ai.agents.repair` Repair a voice agent's configuration write
- `retell_ai.agents.update` Update a voice agent write

**Apps 7**

- `retell_ai.apps.create` Create an app write
- `retell_ai.apps.delete` Delete an app destructive
- `retell_ai.apps.get` Get an app read
- `retell_ai.apps.get_tool_schema` Get an app's tool schema read
- `retell_ai.apps.list` List apps read
- `retell_ai.apps.test_auth` Test an app's authentication read
- `retell_ai.apps.update` Update an app write

**Chats 7**

- `retell_ai.chats.create` Create a chat session write
- `retell_ai.chats.delete` Delete a chat destructive
- `retell_ai.chats.end` End an ongoing chat destructive
- `retell_ai.chats.get` Get a chat read
- `retell_ai.chats.list` List chats read
- `retell_ai.chats.rerun_analysis` Re-run post-chat analysis write
- `retell_ai.chats.update` Update a chat's metadata write

**Contacts 6**

- `retell_ai.contacts.create` Create a contact write
- `retell_ai.contacts.delete` Delete a contact destructive
- `retell_ai.contacts.get` Get a contact read
- `retell_ai.contacts.get_by_phone` Get a contact by phone number read
- `retell_ai.contacts.list` List contacts read
- `retell_ai.contacts.update` Update a contact write

**Phone numbers 6**

- `retell_ai.phone_numbers.create` Buy a phone number destructive
- `retell_ai.phone_numbers.delete` Delete a phone number destructive
- `retell_ai.phone_numbers.get` Get a phone number read
- `retell_ai.phone_numbers.import` Import a phone number from your own telephony provider write
- `retell_ai.phone_numbers.list` List phone numbers read
- `retell_ai.phone_numbers.update` Update a phone number write

**Conversation flow components 5**

- `retell_ai.conversation_flow_components.create` Create a shared conversation flow component write
- `retell_ai.conversation_flow_components.delete` Delete a conversation flow component destructive
- `retell_ai.conversation_flow_components.get` Get a conversation flow component read
- `retell_ai.conversation_flow_components.list` List conversation flow components read
- `retell_ai.conversation_flow_components.update` Update a conversation flow component write

**Conversation flows 5**

- `retell_ai.conversation_flows.create` Create a conversation flow write
- `retell_ai.conversation_flows.delete` Delete a conversation flow destructive
- `retell_ai.conversation_flows.get` Get a conversation flow read
- `retell_ai.conversation_flows.list` List conversation flows read
- `retell_ai.conversation_flows.update` Update a conversation flow write

**Retell LLMS 5**

- `retell_ai.retell_llms.create` Create a Retell LLM response engine write
- `retell_ai.retell_llms.delete` Delete a Retell LLM response engine destructive
- `retell_ai.retell_llms.get` Get a Retell LLM response engine read
- `retell_ai.retell_llms.list` List Retell LLM response engines read
- `retell_ai.retell_llms.update` Update a Retell LLM response engine write

**Test case definitions 5**

- `retell_ai.test_case_definitions.create` Create a test case definition write
- `retell_ai.test_case_definitions.delete` Delete a test case definition destructive
- `retell_ai.test_case_definitions.get` Get a test case definition read
- `retell_ai.test_case_definitions.list` List test case definitions read
- `retell_ai.test_case_definitions.update` Update a test case definition write

**Agent versions 4**

- `retell_ai.agent_versions.create` Create an agent version write
- `retell_ai.agent_versions.delete` Delete an agent version destructive
- `retell_ai.agent_versions.list` List an agent's versions read
- `retell_ai.agent_versions.publish` Publish an agent version write

**Chat agents 4**

- `retell_ai.chat_agents.create` Create a chat agent write
- `retell_ai.chat_agents.delete` Delete a chat agent destructive
- `retell_ai.chat_agents.get` Get a chat agent read
- `retell_ai.chat_agents.update` Update a chat agent write

**Batch tests 3**

- `retell_ai.batch_tests.create` Create a batch test run write
- `retell_ai.batch_tests.get` Get a batch test read
- `retell_ai.batch_tests.list` List batch tests read

**Knowledge bases 3**

- `retell_ai.knowledge_bases.delete` Delete a knowledge base destructive
- `retell_ai.knowledge_bases.get` Get a knowledge base read
- `retell_ai.knowledge_bases.list` List knowledge bases read

**Community voices 2**

- `retell_ai.community_voices.add` Add a community voice to your voices write
- `retell_ai.community_voices.search` Search community voices read

**Contact analysis backfills 2**

- `retell_ai.contact_analysis_backfills.create` Backfill contact analysis data write
- `retell_ai.contact_analysis_backfills.get` Get the contact analysis backfill job status read

**Contact imports 2**

- `retell_ai.contact_imports.create` Start a contact import from an uploaded file write
- `retell_ai.contact_imports.get` Get the current contact import's progress read

**CRM config 2**

- `retell_ai.crm_config.get` Get the CRM sync configuration read
- `retell_ai.crm_config.update` Update the CRM sync configuration write

**CRM sync jobs 2**

- `retell_ai.crm_sync_jobs.create` Run a CRM sync job write
- `retell_ai.crm_sync_jobs.get` Get the CRM sync job status read

**Phone calls 2**

- `retell_ai.phone_calls.create` Create an outbound phone call destructive
- `retell_ai.phone_calls.register` Register an inbound or custom-telephony phone call write

**Test runs 2**

- `retell_ai.test_runs.get` Get a test run read
- `retell_ai.test_runs.list` List the test runs in a batch test read

**Voices 2**

- `retell_ai.voices.get` Get a voice read
- `retell_ai.voices.list` List voices read

**Agents MCP tools 1**

- `retell_ai.agents_mcp_tools.get` Get the MCP tools available to an agent read

**API key info 1**

- `retell_ai.api_key_info.get` Get the API key's identity and owning org read

**App usages 1**

- `retell_ai.app_usages.list` List where an app is used read

**Batch calls 1**

- `retell_ai.batch_calls.create` Create a batch call destructive

**Chat completions 1**

- `retell_ai.chat_completions.create` Send a message in a chat and get the agent's reply write

**Concurrency 1**

- `retell_ai.concurrency.get` Get call concurrency usage and limits read

**Contact conversations 1**

- `retell_ai.contact_conversations.list` List a contact's conversations read

**CRM schema 1**

- `retell_ai.crm_schema.get` Get the CRM schema read

**Export requests 1**

- `retell_ai.export_requests.list` List call export requests read

**Knowledge base sources 1**

- `retell_ai.knowledge_base_sources.delete` Delete a source from a knowledge base destructive

**SMS chats 1**

- `retell_ai.sms_chats.create` Start an outbound SMS chat destructive

**Web calls 1**

- `retell_ai.web_calls.create` Create a web call write

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.

## More connectors like Retell AI

Shares the most action names with

- [Synthflow 16](https://actionlake.com/connectors/synthflow)
- [Dotdigital 11](https://actionlake.com/connectors/dotdigital)
- [Plivo 10](https://actionlake.com/connectors/plivo)
- [Vonage Communications APIs 9](https://actionlake.com/connectors/vonage-communications-apis)
- [JustCall 9](https://actionlake.com/connectors/justcall)
- [Sinch 9](https://actionlake.com/connectors/sinch)

Joins with, on shared entities

- [HubSpot CRM 1](https://actionlake.com/connectors/hubspot-crm)
- [Microsoft Dynamics 365 1](https://actionlake.com/connectors/microsoft-dynamics-365)
- [3CX 1](https://actionlake.com/connectors/3cx)
- [Bland AI 1](https://actionlake.com/connectors/bland-ai)
- [ElevenLabs 1](https://actionlake.com/connectors/elevenlabs)
- [Close 1](https://actionlake.com/connectors/close)

Browse

- [All Email & messaging connectors](https://actionlake.com/connectors/category/email-and-messaging)
- [All connectors](https://actionlake.com/connectors)
- [How actionlake compares](https://actionlake.com/compare)

actionlake is independent. It is not made or endorsed by Retell AI; the name is the vendor's own. Counts are from the Retell AI service file, version 1.0.0.

## Give your agent Retell AI today.

[Connect Retell AI free](https://actionlake.com/console?start=sandbox) [See pricing](https://actionlake.com/pricing)

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

---

Source: https://actionlake.com/connectors/retell-ai
More: https://actionlake.com/llms.txt