Connectors · AI

AssemblyAI MCP server for AI agents.

actionlake is an MCP gateway: one remote MCP server that connects Claude and other MCP clients to AssemblyAI and the rest of your systems. It gives your agent 30 AssemblyAI actions (17 reads, 9 writes and 4 that wait for a confirmation) and holds the AssemblyAI credential itself, so the agent never does. It paces AssemblyAI's limits and records every call.

Connect AssemblyAI 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

30actionsin one signed file
17readlook, never change
9writecreate and update
4wait for a yesdestructive, confirmed first

Set up

Connect AssemblyAI 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 AssemblyAI.
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_keyAssemblyAI API key (assemblyai.com dashboard > API Keys)
- regionYour AssemblyAI region
```
account { op: "connections.requirements", service: "assemblyai" }
# 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: "assemblyai.llm_gateway.list_models" }# list llm gateway models · read · 1 upstream callcheck { action: "assemblyai.webhook_subscriptions.create", input: { … } }# free: inputs, permissions, cost and confirmations, nothing sent

AssemblyAI 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
Setup fields: region
Limits we pace to: 20,000 calls per 5 minutes, per connection
API covered: AssemblyAI API 1.3.4; Voice Agent API 1.0.0; Voice Agent webhooks API 1.0.0; Voice Agent token API 1.0.0; LLM Gateway API 1.0.0; Streaming token API 1.0.0, at your region's assemblyai.com address, set when you connect
Built from: AssemblyAI's documentation, read 22 October 2026assemblyai.com assemblyai.com assemblyai.com
Service file: Version 1.0.0, signed (Ed25519)
Cached reads: 11 of 17 reads, for up to 5 minutes; a write clears what it affects
Shared entities: 1, so ask can line AssemblyAI up with your other systems
Data: Processed and stored in Sydney, Australia. No US region yet

Capabilities

What an AI agent can do in AssemblyAI.

30 actions in 7 areas. Every one carries its effect, so a key can allow the reads and hold the rest.

17readlook, never change
9writecreate and update
4destructivewait for a confirmation

Transcripts
8
6 read · 1 write · 1 destructive
Submit audio for transcription · List transcripts · Search a transcript for words · Get a transcript
LLM gateway
6
2 read · 4 write · 0 destructive
Create an LLM Gateway chat completion · Create an LLM Gateway chat completion (EU endpoint) · Run a speech understanding task on a transcript · Run a speech understanding task on a transcript (EU endpoint)
Agents
5
2 read · 2 write · 1 destructive
Create a voice agent · List voice agents · Get a voice agent · Update a voice agent
Webhook subscriptions
5
2 read · 2 write · 1 destructive
Create a webhook subscription · List webhook subscriptions · Update a webhook subscription · Get a webhook subscription
Sessions
3
2 read · 0 write · 1 destructive
List voice agent sessions · Get a voice agent session · Delete a voice agent session
Streaming tokens
2
2 read · 0 write · 0 destructive
Create a temporary streaming token · Create a temporary streaming token (EU endpoint)
Voice agent tokens
1
1 read · 0 write · 0 destructive
Create a temporary Voice Agent token

Top actions

The AssemblyAI API, shaped for agents.

The ids your agent types, what each does, and the one name it shares with other systems. 9 of AssemblyAI's 9 action names are shared with at least one other connector, so an agent learns them once.

Action	What it does	Effect	Same name in
`assemblyai.sessions.list`List voice agent sessions	List sessions.	read	`comm.call.list`44 connectors
`assemblyai.sessions.get`Get a voice agent session	Retrieve a session.	read	`comm.call.get`40 connectors
`assemblyai.webhook_subscriptions.create`Create a webhook subscription	Create a webhook subscription.	write	`automation.webhook.create`209 connectors
`assemblyai.webhook_subscriptions.list`List webhook subscriptions	List webhook subscriptions.	read	`automation.webhook.list`202 connectors
`assemblyai.sessions.delete`Delete a voice agent session	Delete a session.	destructive	`comm.call.delete`18 connectors
`assemblyai.llm_gateway.create_chat_completion`Create an LLM Gateway chat completion	Create a chat completion.	write	`analytics.inference.create`17 connectors
`assemblyai.llm_gateway.create_chat_completion_eu`Create an LLM Gateway chat completion (EU endpoint)	Create a chat completion.	write	`analytics.inference.create`17 connectors
`assemblyai.transcripts.list`List transcripts	List transcripts.	read	this connector
`assemblyai.transcripts.create`Submit audio for transcription	Transcribe audio.	write	this connector
`assemblyai.llm_gateway.list_models`List LLM Gateway models	List available models.	read	this connector
`assemblyai.llm_gateway.list_models_eu`List LLM Gateway models (EU endpoint)	List available models.	read	this connector
`assemblyai.agents.create`Create a voice agent	Create an agent.	write	this connector

Try it

Prompts to paste into Claude.

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

Readread
List LLM Gateway models in AssemblyAI and tell me what stands out.
callsassemblyai.llm_gateway.list_models
Writewrite
Create a webhook subscription in AssemblyAI. Show me exactly what you will send before you save it.
callsassemblyai.webhook_subscriptions.create

Governance for AssemblyAI

Destructive actions wait for a yes.

4 AssemblyAI actions are destructive. These are all of them:

Delete a voice agent sessionassemblyai.sessions.delete
Delete a webhook subscriptionassemblyai.webhook_subscriptions.delete
Delete a transcriptassemblyai.transcripts.delete
Delete a voice agentassemblyai.agents.delete

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.

doassemblyai.sessions.deleteconfirm_policy: human

Delete a voice agent session?

intent: the user asked me to delete a voice agent session

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

In the console, or from an emailed signed link.

a key for this connector

account {  op: "keys.create", name: "assemblyai-agent",  allowed_actions: ["assemblyai.*"], cap_calls: 2000,  confirm_policy: "human_for_writes",  approval_rules: [    { match: "assemblyai.sessions.delete", approver: "[email protected]" },    { match: "assemblyai.webhook_subscriptions.delete", approver: "[email protected]" },    { match: "assemblyai.transcripts.delete", approver: "[email protected]" }  ]}

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

Cost

What AssemblyAI costs on actionlake.

Every AssemblyAI action is one upstream call, the only thing actionlake bills. Searching, check, cost, account and any call AssemblyAI 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 30 AssemblyAI actions
30actions pageeach page of a long list is one call
11reads 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 AssemblyAI action.

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

Transcripts8

assemblyai.transcripts.createSubmit audio for transcriptionwrite
assemblyai.transcripts.deleteDelete a transcriptdestructive
assemblyai.transcripts.getGet a transcriptread
assemblyai.transcripts.get_paragraphsGet transcript paragraphsread
assemblyai.transcripts.get_redacted_audioGet the PII-redacted audio URLread
assemblyai.transcripts.get_sentencesGet transcript sentencesread
assemblyai.transcripts.listList transcriptsread
assemblyai.transcripts.word_searchSearch a transcript for wordsread

LLM gateway6

assemblyai.llm_gateway.create_chat_completionCreate an LLM Gateway chat completionwrite
assemblyai.llm_gateway.create_chat_completion_euCreate an LLM Gateway chat completion (EU endpoint)write
assemblyai.llm_gateway.create_speech_understandingRun a speech understanding task on a transcriptwrite
assemblyai.llm_gateway.create_speech_understanding_euRun a speech understanding task on a transcript (EU endpoint)write
assemblyai.llm_gateway.list_modelsList LLM Gateway modelsread
assemblyai.llm_gateway.list_models_euList LLM Gateway models (EU endpoint)read

Agents5

assemblyai.agents.createCreate a voice agentwrite
assemblyai.agents.deleteDelete a voice agentdestructive
assemblyai.agents.getGet a voice agentread
assemblyai.agents.listList voice agentsread
assemblyai.agents.updateUpdate a voice agentwrite

Webhook subscriptions5

assemblyai.webhook_subscriptions.createCreate a webhook subscriptionwrite
assemblyai.webhook_subscriptions.deleteDelete a webhook subscriptiondestructive
assemblyai.webhook_subscriptions.getGet a webhook subscriptionread
assemblyai.webhook_subscriptions.listList webhook subscriptionsread
assemblyai.webhook_subscriptions.updateUpdate a webhook subscriptionwrite

Sessions3

assemblyai.sessions.deleteDelete a voice agent sessiondestructive
assemblyai.sessions.getGet a voice agent sessionread
assemblyai.sessions.listList voice agent sessionsread

Streaming tokens2

assemblyai.streaming_tokens.createCreate a temporary streaming tokenread
assemblyai.streaming_tokens.create_euCreate a temporary streaming token (EU endpoint)read

Voice agent tokens1

assemblyai.voice_agent_tokens.createCreate a temporary Voice Agent tokenread

Questions

The AssemblyAI MCP server, answered.

Is there an AssemblyAI MCP server for Claude?

Yes. actionlake is an MCP gateway: a remote MCP server that gives Claude, or another MCP client, 30 AssemblyAI actions across transcripts, LLM gateway, agents and webhook subscriptions, through the same eight tools it uses for every other connector. actionlake is independent; it is not made or endorsed by AssemblyAI.

What do I need to connect AssemblyAI?

AssemblyAI API key (assemblyai.com dashboard > API Keys). Plus your region. The free call account { op: "connections.requirements", service: "assemblyai" } lists exactly what to paste.

Can an AI agent delete or change things in AssemblyAI?

Only if its key allows it, and only with an explicit confirmation. 4 AssemblyAI actions are destructive, including delete a voice agent session, delete a webhook subscription and delete a transcript. 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 AssemblyAI API limit?

actionlake paces every call to the limits in the AssemblyAI service file: 20,000 calls per 5 minutes per connection. Repeated reads are answered from cache (11 AssemblyAI actions can be), which never reaches AssemblyAI.

What does an AssemblyAI action cost?

One upstream call, the only unit actionlake bills. A list that pages bills one call per page (30 AssemblyAI actions page). Cache hits, searches, dry runs and calls AssemblyAI 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 AssemblyAI API does it cover?

The AssemblyAI API 1.3.4; Voice Agent API 1.0.0; Voice Agent webhooks API 1.0.0; Voice Agent token API 1.0.0; LLM Gateway API 1.0.0; Streaming token API 1.0.0 at your region's assemblyai.com address, set when you connect. It is built from AssemblyAI's documentation as read on 22 October 2026. 30 actions in 7 areas, each one in the signed service file (version 1.0.0).

Does actionlake keep my AssemblyAI 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 AssemblyAI 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 AssemblyAI today.

Connect AssemblyAI free See pricing

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

AssemblyAI MCP server for AI agents.

Connect AssemblyAI in three steps.

Add actionlake to Claude.

Connect AssemblyAI.

Make the first call. Check before a write.

What an AI agent can do in AssemblyAI.

Transcripts

LLM gateway

Agents

Webhook subscriptions

Sessions

Streaming tokens

Voice agent tokens