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Connectors · AI

Synthesia MCP server for AI agents.

actionlake is an MCP gateway: one remote MCP server that connects Claude and other MCP clients to Synthesia and the rest of your systems. It gives your agent 27 Synthesia actions (14 reads, 11 writes and 2 that wait for a confirmation) and holds the Synthesia credential itself, so the agent never does. It paces Synthesia's limits and records every call.

Connect Synthesia freeSee 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: "synthesia.videos.list",  intent: "check which Synthesia account is connected"}# List videos · read · 1 upstream call
  • 27actionsin one signed file
  • 14readlook, never change
  • 11writecreate and update
  • 2wait for a yesdestructive, confirmed first

Set up

Connect Synthesia 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 Synthesia.

    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_keySynthesia API key: in Synthesia Studio open Settings > API keys and create a key
    account { op: "connections.requirements", service: "synthesia" }
# 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: "synthesia.videos.list" }# list videos · read · 1 upstream callcheck { action: "synthesia.webhooks.create", input: { … } }# free: inputs, permissions, cost and confirmations, nothing sent

Synthesia 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
5 calls a second, per connection
API covered
Synthesia Video API v2 + developers API (OpenAPI 3 per reference page)api.synthesia.io
Built from
Synthesia's documentation, read 23 October 2026docs.synthesia.iodocs.synthesia.io
Service file
Version 1.0.0, signed (Ed25519)
Cached reads
13 of 14 reads, for up to 5 minutes; a write clears what it affects
Shared entities
1, so ask can line Synthesia up with your other systems
Data
Processed and stored in Sydney, Australia. No US region yet

Capabilities

What an AI agent can do in Synthesia.

27 actions in 10 areas. Every one carries its effect, so a key can allow the reads and hold the rest.

  • 14readlook, never change
  • 11writecreate and update
  • 2destructivewait for a confirmation

  1. Videos

    7

    3 read · 3 write · 1 destructive

    List videos · Create a video · Retrieve a video · Update a video

  2. Translations

    4

    2 read · 2 write · 0 destructive

    Translate and generate a video from XLIFF definition · Get supported languages for translations · Get video translations of a given root video id · Start/Update a video translation

  3. Webhooks

    4

    2 read · 1 write · 1 destructive

    Create a Webhook · List webhooks · Retrieve a webhook · Delete a webhook

  4. Dubbing projects

    3

    1 read · 2 write · 0 destructive

    Create a dubbing project from an uploaded video asset · Add locales to a dubbing project (original imported video) · Get dubbing project status and videos

  5. Assets

    2

    1 read · 1 write · 0 destructive

    Create media asset · Get user media asset

  6. Audit log events

    2

    2 read · 0 write · 0 destructive

    Query audit log events · Search audit log events (Advanced)

  7. Templates

    2

    2 read · 0 write · 0 destructive

    List templates · Retrieve a template

  8. Billing

    1

    1 read · 0 write · 0 destructive

    Get the credit balance

2 more areas · 2 actions
  • Interactive avatar sessions 1
  • Interactive avatars 1

Top actions

The Synthesia API, shaped for agents.

The ids your agent types, what each does, and the one name it shares with other systems. 11 of Synthesia's 11 action names are shared with at least one other connector, so an agent learns them once.

ActionWhat it doesEffectSame name in
synthesia.videos.listList videosList videos.readcontent.video.list4 connectors
synthesia.webhooks.createCreate a WebhookCreate a Webhook.writeautomation.webhook.create209 connectors
synthesia.webhooks.listList webhooksList webhooks.readautomation.webhook.list202 connectors
synthesia.webhooks.deleteDelete a webhookDelete a webhook.destructiveautomation.webhook.delete211 connectors
synthesia.videos.createCreate a videoCreate a video.writecontent.video.create2 connectors
synthesia.audit_log_events.listQuery audit log eventsQuery audit log events.readsecurity.audit_log.list69 connectors
synthesia.audit_log_events.searchSearch audit log events (Advanced)Search audit log events (Advanced).readsecurity.audit_log.search9 connectors
synthesia.templates.listList templatesList templates.readthis connector
synthesia.dubbing_projects.createCreate a dubbing project from an uploaded video assetCreate a dubbing project from an uploaded video asset.writethis connector
synthesia.translations.import_xliffTranslate and generate a video from XLIFF definitionTranslate and generate a video from XLIFF definition.writethis connector
synthesia.translations.list_languagesGet supported languages for translationsGet supported languages for translations.readthis connector
synthesia.videos.create_from_templateCreate a video from a templateCreate a video from a template.writethis connector

Try it

Prompts to paste into Claude.

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

  1. Readread

    Which Synthesia files changed this week, and who changed them?

    callssynthesia.videos.list

  2. Writewrite

    Create a Webhook in Synthesia. Show me exactly what you will send before you save it.

    callssynthesia.webhooks.create

Governance for Synthesia

Destructive actions wait for a yes.

2 Synthesia actions are destructive. These are all of them:

  • Delete a webhooksynthesia.webhooks.delete
  • Delete a videosynthesia.videos.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.

dosynthesia.webhooks.deleteconfirm_policy: human

Delete a webhook?

intent: the user asked me to delete a webhook

run suspended · waiting for a named person · key synthesia-agent cannot confirm itself
In the console, or from an emailed signed link.
a key for this connector
account {  op: "keys.create", name: "synthesia-agent",  allowed_actions: ["synthesia.*"], cap_calls: 2000,  confirm_policy: "human_for_writes",  approval_rules: [    { match: "synthesia.webhooks.delete", approver: "[email protected]" },    { match: "synthesia.videos.delete", approver: "[email protected]" }  ]}
Illustrative. Scoped to Synthesia only, capped at 2,000 upstream calls, every write confirmed, and the destructive ones approved by a named person.

Cost

What Synthesia costs on actionlake.

Every Synthesia action is one upstream call, the only thing actionlake bills. Searching, check, cost, account and any call Synthesia 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 27 Synthesia actions
  • 27actions pageeach page of a long list is one call
  • 13reads 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 Synthesia action.

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

Videos7
  • synthesia.videos.createCreate a videowrite
  • synthesia.videos.create_from_templateCreate a video from a templatewrite
  • synthesia.videos.deleteDelete a videodestructive
  • synthesia.videos.export_xliffRetrieve XLIFF content for a videoread
  • synthesia.videos.getRetrieve a videoread
  • synthesia.videos.listList videosread
  • synthesia.videos.updateUpdate a videowrite
Translations4
  • synthesia.translations.getGet video translations of a given root video idread
  • synthesia.translations.import_xliffTranslate and generate a video from XLIFF definitionwrite
  • synthesia.translations.list_languagesGet supported languages for translationsread
  • synthesia.translations.startStart/Update a video translationwrite
Webhooks4
  • synthesia.webhooks.createCreate a Webhookwrite
  • synthesia.webhooks.deleteDelete a webhookdestructive
  • synthesia.webhooks.getRetrieve a webhookread
  • synthesia.webhooks.listList webhooksread
Dubbing projects3
  • synthesia.dubbing_projects.add_localesAdd locales to a dubbing project (original imported video)write
  • synthesia.dubbing_projects.createCreate a dubbing project from an uploaded video assetwrite
  • synthesia.dubbing_projects.getGet dubbing project status and videosread
Assets2
  • synthesia.assets.createCreate media assetwrite
  • synthesia.assets.getGet user media assetread
Audit log events2
  • synthesia.audit_log_events.listQuery audit log eventsread
  • synthesia.audit_log_events.searchSearch audit log events (Advanced)read
Templates2
  • synthesia.templates.getRetrieve a templateread
  • synthesia.templates.listList templatesread
Billing1
  • synthesia.billing.get_creditsGet the credit balanceread
Interactive avatar sessions1
  • synthesia.interactive_avatar_sessions.createStart an interactive avatar sessionwrite
Interactive avatars1
  • synthesia.interactive_avatars.createCreate an interactive avatarwrite

Questions

The Synthesia MCP server, answered.

Is there a Synthesia MCP server for Claude?

Yes. actionlake is an MCP gateway: a remote MCP server that gives Claude, or another MCP client, 27 Synthesia actions across videos, translations, webhooks and dubbing projects, through the same eight tools it uses for every other connector. actionlake is independent; it is not made or endorsed by Synthesia.

What do I need to connect Synthesia?

Synthesia API key: in Synthesia Studio open Settings > API keys and create a key. The free call account { op: "connections.requirements", service: "synthesia" } lists exactly what to paste.

Can an AI agent delete or change things in Synthesia?

Only if its key allows it, and only with an explicit confirmation. 2 Synthesia actions are destructive, including delete a webhook and delete a video. 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 Synthesia API limit?

actionlake paces every call to the limits in the Synthesia service file: 5 calls a second per connection. Repeated reads are answered from cache (13 Synthesia actions can be), which never reaches Synthesia.

What does a Synthesia action cost?

One upstream call, the only unit actionlake bills. A list that pages bills one call per page (27 Synthesia actions page). Cache hits, searches, dry runs and calls Synthesia 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 Synthesia API does it cover?

The Synthesia Video API v2 + developers API (OpenAPI 3 per reference page) at api.synthesia.io. It is built from Synthesia's documentation as read on 23 October 2026. 27 actions in 10 areas, each one in the signed service file (version 1.0.0).

Does actionlake keep my Synthesia 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 Synthesia 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.

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

Give your agent Synthesia today.

Connect Synthesia freeSee pricing

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