Connectors · Email & messaging

Synthflow MCP server for AI agents.

actionlake is an MCP gateway: one remote MCP server that connects Claude and other MCP clients to Synthflow and the rest of your systems. It gives your agent 110 Synthflow actions (44 reads, 49 writes and 17 that wait for a confirmation) and holds the Synthflow credential itself, so the agent never does. It paces Synthflow's limits and records every call.

Connect Synthflow 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

110actionsin one signed file
44readlook, never change
49writecreate and update
17wait for a yesdestructive, confirmed first

Set up

Connect Synthflow 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 Synthflow.
Bearer token. 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_keySynthflow API key: in the Synthflow app open Settings > API keys and create a key
- hostWhere your Synthflow lives: your host
```
account { op: "connections.requirements", service: "synthflow" }
# 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: "synthflow.contacts.list" }# list contacts · read · 1 upstream callcheck { action: "synthflow.contacts.create", input: { … } }# free: inputs, permissions, cost and confirmations, nothing sent

Synthflow at a glance

Sign-in: Bearer token. 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: host
Limits we pace to: 10 calls a second, per connection
API covered: Synthflow Platform API v2 (OpenAPI 3.1.0)api.synthflow.ai/v2
Built from: Synthflow's documentation, read 23 October 2026docs.synthflow.ai docs.synthflow.ai
Service file: Version 1.0.0, signed (Ed25519)
Cached reads: 43 of 44 reads, for up to 5 minutes; a write clears what it affects
Shared entities: 2, so ask can line Synthflow up with your other systems
Data: Processed and stored in Sydney, Australia. No US region yet

Capabilities

What an AI agent can do in Synthflow.

110 actions in 23 areas. Every one carries its effect, so a key can allow the reads and hold the rest.

44readlook, never change
49writecreate and update
17destructivewait for a confirmation

Memory stores
10
3 read · 6 write · 1 destructive
Create a memory store · List memory stores · Attach a memory store to an agent · Attach a contact to a memory store
Actions
8
2 read · 5 write · 1 destructive
Create an action · Initialize a custom action · List actions · Attach an action
Assistants
7
2 read · 3 write · 2 destructive
Create an agent · List agents · Attach phone numbers to an agent · Get an agent
Batch calls
7
3 read · 3 write · 1 destructive
Create a batch call · List batch calls · List batch call recipients · Get a batch call
Knowledge bases
7
2 read · 4 write · 1 destructive
List knowledge bases · Create a knowledge base · Attach a knowledge base · Detach a knowledge base
Simulation cases
7
3 read · 3 write · 1 destructive
Create a simulation case · Generate test cases · List simulation cases · List simulation cases by agent
Chats
6
2 read · 3 write · 1 destructive
List chats · Create a chat · Get a chat · Delete a chat
Simulation suites
6
2 read · 3 write · 1 destructive
Create a simulation suite · Execute a simulation suite · List simulation suites · Get a simulation suite

15 more areas · 52 actions

Calls 5
Contacts 5
Knowledge base sources 5
Phone numbers 5
Simulation scenarios 5
Subaccounts 5
Phonebook entries 4
Workspace MCP config 4
Phonebooks 3
Simulations 3
Simulation sessions 2
Webhook logs 2
Workspace MCP tools 2
Analytics 1
Voices 1

Top actions

The Synthflow API, shaped for agents.

The ids your agent types, what each does, and the one name it shares with other systems. 17 of Synthflow's 17 action names are shared with at least one other connector, so an agent learns them once.

Action	What it does	Effect	Same name in
`synthflow.contacts.list`List contacts	List contacts.	read	`crm.contact.list`177 connectors
`synthflow.calls.list`List calls	List calls.	read	`comm.call.list`44 connectors
`synthflow.contacts.create`Create a contact	Create a contact.	write	`crm.contact.create`161 connectors
`synthflow.calls.create`Make a call	Make a call.	write	`comm.call.create`38 connectors
`synthflow.contacts.delete`Delete a contact	Delete a contact.	destructive	`crm.contact.delete`147 connectors
`synthflow.phone_numbers.list`List phone numbers	List phone numbers.	read	`comm.phone_number.list`23 connectors
`synthflow.chats.list`List chats	List chats.	read	`comm.chat.list`20 connectors
`synthflow.chats.create`Create a chat	Create a chat.	write	`comm.chat.create`15 connectors
`synthflow.phone_numbers.get`Get a phone number	Get a phone number.	read	`comm.phone_number.get`22 connectors
`synthflow.knowledge_bases.list`List knowledge bases	List knowledge bases.	read	`knowledge.knowledge_base.list`4 connectors
`synthflow.voices.list`Get voices	Get voices.	read	this connector
`synthflow.actions.create`Create an action	Create an action.	write	this connector

Try it

Prompts to paste into Claude.

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

Readread
Find the Synthflow contacts with no email address, so we can clean them up.
callssynthflow.contacts.list
Writewrite
Create a contact in Synthflow. Show me exactly what you will send before you save it.
callssynthflow.contacts.create
Across systemsread
Which contacts are in both Synthflow and HaloPSA, and how many are in only one of them?
callssynthflow.contacts.listhalopsa.users.list

Across your systems

Synthflow, joined to the rest of your business.

One ask fetches from Synthflow and another system, joins the rows on the same customer on our side, and hands your agent the answer, not every row.

Which contacts are in both Synthflow and HaloPSA, and how many are in only one of them?
synthflow.contacts.list + halopsa.users.list, on crm.contact · HaloPSA
Which contacts are in both Synthflow and NetSuite, and how many are in only one of them?
synthflow.contacts.list + netsuite.views.contacts, on crm.contact · NetSuite

Also mapped by other connectorscrm.contact 192comm.call 33

ask

ask {  intent: "which contacts are in both Synthflow and HaloPSA, and how many are in only one of them",  steps: [    { action: "synthflow.contacts.list", as: "people", input: {}, limit: 100, max_pages: 5 },    { action: "halopsa.users.list", as: "people2", input: {}, limit: 100, max_pages: 5 },    { join: {        left: "people",        right: "people2",        on: "crm.contact",        group_by: "people.email",        select: ["people.email", "count(people2.id) as in_halopsa"]    } }  ]}

Example. Run it through check first: it validates the steps and prices them, and it is free.

Governance for Synthflow

Destructive actions wait for a yes.

17 Synthflow actions are destructive. These are all of them:

Delete a contactsynthflow.contacts.delete
Delete a chatsynthflow.chats.delete
Delete a phone numbersynthflow.phone_numbers.delete
Delete an actionsynthflow.actions.delete
Delete an agentsynthflow.assistants.delete
Delete a knowledge basesynthflow.knowledge_bases.delete
Detach phone number from an agentsynthflow.assistants.detach_phone_number
Cancel a batch callsynthflow.batch_calls.cancel
Delete a phone booksynthflow.phonebooks.delete
Delete a subaccountsynthflow.subaccounts.delete
Delete a memory storesynthflow.memory_stores.delete
Delete a simulation casesynthflow.simulation_cases.delete
Delete a phone book entrysynthflow.phonebook_entries.delete
Delete a simulation suitesynthflow.simulation_suites.delete
Delete a simulation scenariosynthflow.simulation_scenarios.delete
Delete MCP configurationsynthflow.workspace_mcp_config.delete
Delete a knowledge base sourcesynthflow.knowledge_base_sources.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.

dosynthflow.contacts.deleteconfirm_policy: human

Delete a contact?

intent: the user asked me to delete a contact

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

In the console, or from an emailed signed link.

a key for this connector

account {  op: "keys.create", name: "synthflow-agent",  allowed_actions: ["synthflow.*"], cap_calls: 2000,  confirm_policy: "human_for_writes",  approval_rules: [    { match: "synthflow.contacts.delete", approver: "[email protected]" },    { match: "synthflow.chats.delete", approver: "[email protected]" },    { match: "synthflow.phone_numbers.delete", approver: "[email protected]" }  ]}

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

Cost

What Synthflow costs on actionlake.

Every Synthflow action is one upstream call, the only thing actionlake bills. Searching, check, cost, account and any call Synthflow 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 110 Synthflow actions
110actions pageeach page of a long list is one call
43reads 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 Synthflow action.

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

Memory stores10

synthflow.memory_stores.attach_assistantAttach a memory store to an agentwrite
synthflow.memory_stores.attach_contactAttach a contact to a memory storewrite
synthflow.memory_stores.createCreate a memory storewrite
synthflow.memory_stores.deleteDelete a memory storedestructive
synthflow.memory_stores.detach_assistantDetach a memory store from an agentwrite
synthflow.memory_stores.detach_contactDetach a contact from a memory storewrite
synthflow.memory_stores.getGet a memory storeread
synthflow.memory_stores.get_contact_memoryGet data for a specific memory store and contactread
synthflow.memory_stores.listList memory storesread
synthflow.memory_stores.updateUpdate a memory storewrite

Actions8

synthflow.actions.attachAttach an actionwrite
synthflow.actions.createCreate an actionwrite
synthflow.actions.deleteDelete an actiondestructive
synthflow.actions.detachDetach an actionwrite
synthflow.actions.getGet an actionread
synthflow.actions.initializeInitialize a custom actionwrite
synthflow.actions.listList actionsread
synthflow.actions.updateUpdate an actionwrite

Assistants7

synthflow.assistants.attach_phone_numbersAttach phone numbers to an agentwrite
synthflow.assistants.createCreate an agentwrite
synthflow.assistants.deleteDelete an agentdestructive
synthflow.assistants.detach_phone_numberDetach phone number from an agentdestructive
synthflow.assistants.getGet an agentread
synthflow.assistants.listList agentsread
synthflow.assistants.updateUpdate an agentwrite

Batch calls7

synthflow.batch_calls.cancelCancel a batch calldestructive
synthflow.batch_calls.createCreate a batch callwrite
synthflow.batch_calls.getGet a batch callread
synthflow.batch_calls.listList batch callsread
synthflow.batch_calls.list_tasksList batch call recipientsread
synthflow.batch_calls.pausePause a batch callwrite
synthflow.batch_calls.resumeResume a batch callwrite

Knowledge bases7

synthflow.knowledge_bases.attachAttach a knowledge basewrite
synthflow.knowledge_bases.createCreate a knowledge basewrite
synthflow.knowledge_bases.deleteDelete a knowledge basedestructive
synthflow.knowledge_bases.detachDetach a knowledge basewrite
synthflow.knowledge_bases.getGet a knowledge baseread
synthflow.knowledge_bases.listList knowledge basesread
synthflow.knowledge_bases.updateUpdate a knowledge basewrite

Simulation cases7

synthflow.simulation_cases.createCreate a simulation casewrite
synthflow.simulation_cases.deleteDelete a simulation casedestructive
synthflow.simulation_cases.generateGenerate test caseswrite
synthflow.simulation_cases.getGet a simulation caseread
synthflow.simulation_cases.listList simulation casesread
synthflow.simulation_cases.list_by_agentList simulation cases by agentread
synthflow.simulation_cases.updateUpdate a simulation casewrite

Chats6

synthflow.chats.createCreate a chatwrite
synthflow.chats.create_outboundStart an outbound chat conversationwrite
synthflow.chats.deleteDelete a chatdestructive
synthflow.chats.getGet a chatread
synthflow.chats.listList chatsread
synthflow.chats.send_messageSend a message in a chatwrite

Simulation suites6

synthflow.simulation_suites.createCreate a simulation suitewrite
synthflow.simulation_suites.deleteDelete a simulation suitedestructive
synthflow.simulation_suites.executeExecute a simulation suitewrite
synthflow.simulation_suites.getGet a simulation suiteread
synthflow.simulation_suites.listList simulation suitesread
synthflow.simulation_suites.updateUpdate a simulation suitewrite

Calls5

synthflow.calls.createMake a callwrite
synthflow.calls.getGet a callread
synthflow.calls.get_ws_media_base_urlGet the WebSocket media base URLread
synthflow.calls.listList callsread
synthflow.calls.start_ws_media_testStart a WebSocket media callwrite

Contacts5

synthflow.contacts.createCreate a contactwrite
synthflow.contacts.deleteDelete a contactdestructive
synthflow.contacts.getGet a contactread
synthflow.contacts.listList contactsread
synthflow.contacts.updateUpdate a contactwrite

Knowledge base sources5

synthflow.knowledge_base_sources.createAdd a knowledge base sourcewrite
synthflow.knowledge_base_sources.deleteDelete a knowledge base sourcedestructive
synthflow.knowledge_base_sources.getGet a knowledge base sourceread
synthflow.knowledge_base_sources.listList knowledge base sourcesread
synthflow.knowledge_base_sources.updateUpdate a knowledge base sourcewrite

Phone numbers5

synthflow.phone_numbers.create_customImport phone numberwrite
synthflow.phone_numbers.deleteDelete a phone numberdestructive
synthflow.phone_numbers.getGet a phone numberread
synthflow.phone_numbers.listList phone numbersread
synthflow.phone_numbers.updateUpdate a phone numberwrite

Simulation scenarios5

synthflow.simulation_scenarios.createCreate a simulation scenariowrite
synthflow.simulation_scenarios.deleteDelete a simulation scenariodestructive
synthflow.simulation_scenarios.getGet a simulation scenarioread
synthflow.simulation_scenarios.listList simulation scenariosread
synthflow.simulation_scenarios.updateUpdate a simulation scenariowrite

Subaccounts5

synthflow.subaccounts.createCreate a subaccountwrite
synthflow.subaccounts.deleteDelete a subaccountdestructive
synthflow.subaccounts.getGet a subaccountread
synthflow.subaccounts.listList subaccountsread
synthflow.subaccounts.updateUpdate a subaccountwrite

Phonebook entries4

synthflow.phonebook_entries.createCreate a phone book entrywrite
synthflow.phonebook_entries.deleteDelete a phone book entrydestructive
synthflow.phonebook_entries.listList phone book entriesread
synthflow.phonebook_entries.updateUpdate a phone book entrywrite

Workspace MCP config4

synthflow.workspace_mcp_config.createSet MCP configurationwrite
synthflow.workspace_mcp_config.deleteDelete MCP configurationdestructive
synthflow.workspace_mcp_config.getGet MCP configurationread
synthflow.workspace_mcp_config.updateUpdate MCP configurationwrite

Phonebooks3

synthflow.phonebooks.createCreate a phone bookwrite
synthflow.phonebooks.deleteDelete a phone bookdestructive
synthflow.phonebooks.listList phone booksread

Simulations3

synthflow.simulations.getGet a simulationread
synthflow.simulations.listList simulationsread
synthflow.simulations.startStart a simulationwrite

Simulation sessions2

synthflow.simulation_sessions.getGet a simulation sessionread
synthflow.simulation_sessions.listList simulation sessionsread

Webhook logs2

synthflow.webhook_logs.getGet Webhook Log Detailread
synthflow.webhook_logs.listList Webhook Logsread

Workspace MCP tools2

synthflow.workspace_mcp_tools.discoverDiscover MCP toolsread
synthflow.workspace_mcp_tools.invokeInvoke an MCP toolwrite

Analytics1

synthflow.analytics.exportExport analytics dataread

Voices1

synthflow.voices.listGet voicesread

Questions

The Synthflow MCP server, answered.

Is there a Synthflow MCP server for Claude?

Yes. actionlake is an MCP gateway: a remote MCP server that gives Claude, or another MCP client, 110 Synthflow actions across memory stores, actions, assistants and batch calls, through the same eight tools it uses for every other connector. actionlake is independent; it is not made or endorsed by Synthflow.

What do I need to connect Synthflow?

Synthflow API key: in the Synthflow app open Settings > API keys and create a key. Plus your host. The free call account { op: "connections.requirements", service: "synthflow" } lists exactly what to paste.

Can an AI agent delete or change things in Synthflow?

Only if its key allows it, and only with an explicit confirmation. 17 Synthflow actions are destructive, including delete a contact, delete a chat and delete a phone number. 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 Synthflow API limit?

actionlake paces every call to the limits in the Synthflow service file: 10 calls a second per connection. Repeated reads are answered from cache (43 Synthflow actions can be), which never reaches Synthflow.

What does a Synthflow action cost?

One upstream call, the only unit actionlake bills. A list that pages bills one call per page (110 Synthflow actions page). Cache hits, searches, dry runs and calls Synthflow 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 Synthflow API does it cover?

The Synthflow Platform API v2 (OpenAPI 3.1.0) at api.synthflow.ai/v2 by default, or the base URL set when you connect. It is built from Synthflow's documentation as read on 23 October 2026. 110 actions in 23 areas, each one in the signed service file (version 1.0.0).

Can I combine Synthflow with my other systems?

Yes. ask joins Synthflow to HaloPSA or NetSuite on the same customer and returns the answer rather than every row. Synthflow maps crm.contact, which 192 other connectors also map.

Does actionlake keep my Synthflow 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 Synthflow 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 Synthflow today.

Connect Synthflow free See pricing

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

Synthflow MCP server for AI agents.

Connect Synthflow in three steps.

Add actionlake to Claude.

Connect Synthflow.

Make the first call. Check before a write.

What an AI agent can do in Synthflow.

Memory stores

Actions

Assistants

Batch calls

Knowledge bases

Simulation cases

Chats

Simulation suites