FlowCastle

warnings

api.flowcastle.ai

Build, edit, and deploy Telegram bots on FlowCastle's hosted visual flow platform.

https://api.flowcastle.ai/api/mcpWebsiteNo authMCP 2025-11-25v0.1.0last checked 24 Aug 2026spoke MCP on 2 of 2 checks (30 days)initialize in 599 ms

How to authenticate

Checked against the endpoint by our probe on 24 Aug 2026. These are the capabilities the server advertises, not a prediction about any particular client.

Scheme	No auth
Protected-resource metadata	✕Not found Without it a client has to guess where the authorization server lives.
Anonymous access	Handshake succeeds; 28 tools listable
Credentials demanded in prose	✕list_applications, create_application, set_watched_groups, sync_dialog_contacts, install_module, get_action_schema, get_design_guidelines These tools are listed anonymously and their own descriptions ask for an account or key, but no challenge is issued — so a client has nothing to act on and the refusal arrives as a tool error.

What the probe found

warningTools needing credentials are listed without a challenge

7 of the 28 tools listed anonymously say in their own descriptions that they need an account or a key (list_applications, create_application, set_watched_groups, sync_dialog_contacts, install_module, get_action_schema, get_design_guidelines), but the endpoint issued no WWW-Authenticate challenge. The requirement is stated only in prose, so a call reaches the tool and comes back as a tool error instead of an authorization step.

No CORS headers for browser-based clients

A cross-origin preflight came back without Access-Control-Allow-Origin, so the endpoint is reachable from native clients only — code running in a web page is stopped by the browser before a request is ever sent.

Tools

apply_actionscreate_applicationcreate_contactget_action_schemaget_application_contextget_block_detailsget_broadcast_analyticsget_broadcast_detailsget_contactget_design_guidelinesget_flow_contextget_flow_exampleget_module_catalogget_module_detailsget_variable_contextget_workspace_summaryinstall_modulelist_applicationslist_broadcastslist_contactslist_watched_groupssearch_flow_examplessend_messageset_watched_groupssync_dialog_contactsupdate_applicationupdate_contactvalidate_actions

Contract history

24 Aug 2026v0.1.0first recorded contract

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Status badge

Status for a README, from the last probe — cached an hour, so up to seven hours behind the endpoint. Links back to this page.

[![MCP status](https://mcpi.app/servers/flowcastle/badge.svg)](https://mcpi.app/servers/flowcastle)