The FlowCastle MCP server,
connected in one click.
Build, edit, and deploy Telegram bots on FlowCastle's hosted visual flow platform. Connect the official FlowCastle MCP server to Claude, ChatGPT, or Cursor through gate — one gateway URL, no config files, security-checked.
Free to start · No credit card · No hosting needed
What your AI can do with FlowCastle
Real prompts you can type the moment it's connected — no setup, no docs to read.
“Use “list_applications”: List the applications this API key can access, with the caller role and the permissions it grants. Start here when using a personal API key.”
“Use “create_application”: Create a new application (workspace) owned by the caller. Requires a personal API key (usr_...) — application-scoped keys cannot create appl.”
“Use “update_application”: Update application-level settings (name, active state, default language, incoming-message behavior). Requires the manage_settings permission.”
“Use “list_watched_groups”: List the group/channel chats a telegram_mtproto userbot monitors. Read-only. The watched list is the single source of truth for which chats.”
How secure is the FlowCastle MCP server?
Every server in the gate directory has to pass the same four checks before your AI can touch it. Here's how FlowCastle holds up.
Official endpoint
Operated by FlowCastle (flowcastle.ai) at its documented MCP endpoint — not a third-party mirror or community re-host.
No sign-in needed
This server only exposes public data — no account and no credentials are involved when you connect.
Scanned before it goes live
gate checks every tool for prompt injection, hidden instructions, data-exfiltration hints, and over-broad permissions before the server is available through your gateway.
Watched for drift
If FlowCastle adds or changes tools later, gate re-scans and alerts you — before your AI acts on the change.
Connected in three steps
Connect your gate
Add one gateway URL to Claude, ChatGPT, or any MCP client. One-time setup, about two minutes.
Pick FlowCastle
Choose FlowCastle in the gate directory. No sign-in needed.
Use it anywhere
FlowCastle's tools are live in every AI client you've connected — with rules and logging built in.
Free to start · No credit card · No hosting needed
The actual tools FlowCastle exposes
Fetched live from the official endpoint and re-checked daily by gate — not marketing copy.
list_applications — List the applications this API key can access, with the caller role and the permissions it grants. Start here when using a personal API key
create_application — Create a new application (workspace) owned by the caller. Requires a personal API key (usr_...) — application-scoped keys cannot create appl
update_application — Update application-level settings (name, active state, default language, incoming-message behavior). Requires the manage_settings permission
list_watched_groups — List the group/channel chats a telegram_mtproto userbot monitors. Read-only. The watched list is the single source of truth for which chats
set_watched_groups — Replace a telegram_mtproto userbot's watched-groups list — the chats it monitors. Requires the manage_settings permission. SET semantics: se
sync_dialog_contacts — Import a telegram_mtproto userbot's existing chats as contacts — DM partners, groups, and channels — so everything the account already talks
get_workspace_summary — Return a compact application, flow, sequence, operation, and bot summary — the cheapest way to orient in a workspace. Read-only, no side eff
get_variable_context — Search variable definitions by scope and keyword. Read-only. Returns { variables, total, returned, truncated } — compare returned against to
+ 28 more tools once connected
The FlowCastle MCP server at a glance
https://api.flowcastle.ai/api/mcpQuestions, answered
Is there an official FlowCastle MCP server?
Yes — FlowCastle operates its own remote MCP server at api.flowcastle.ai. gate connects you to that official endpoint and adds security scanning, per-tool access rules, and an activity log on top.
How do I connect FlowCastle to Claude or ChatGPT?
Add gate's gateway URL to your AI client once, then pick FlowCastle in the directory. No account or sign-in is needed. From then on, FlowCastle's tools are available in every client you've connected to gate.
Do I need to host anything?
No. FlowCastle runs the server, and gate is fully managed. You just connect one URL — there's nothing to install, deploy, or maintain.
Is the FlowCastle MCP server safe to connect?
It's the vendor's official endpoint, and gate scans its tools for prompt injection and hidden instructions before it goes live, re-checks it whenever it changes, and lets you allow, block, or require approval for every single tool.
Is it free?
Yes — you can get started with gate for free and connect FlowCastle in minutes. No credit card required.
Connect more than just FlowCastle
Every server below works through the same gateway URL — connect once, add tools anytime.
Squarespace DomainsDesignView →Set up FlowCastle in: Claude · Claude Code · ChatGPT · Cursor · VS Code