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OneSignal MCP Server
OneSignal's hosted MCP endpoint for push, email and SMS messaging, users, segments and exports
Official · onesignal.com Remote (hosted) · Streamable HTTP CommunicationCRM and salesData and analytics
Connect your client
Remote (hosted)
Add in one click
Opens the app, which asks before it adds the server.
Or add it by command or config
Claude Codeterminal
claude mcp add --transport http onesignal https://api.onesignal.com/mcp/oauthClaude (desktop and web)Settings > Connectors: install from the connectors directory, or Add custom connector with the URL
https://api.onesignal.com/mcp/oauthCursorCursor Marketplace plugin, or point mcp.json at the URL
{
"mcpServers": {
"onesignal": {
"url": "https://api.onesignal.com/mcp/oauth"
}
}
}ChatGPTOpenAI / ChatGPT plugins directory
https://api.onesignal.com/mcp/oauthCodexOpenAI plugin directory
[mcp_servers.onesignal]
url = "https://api.onesignal.com/mcp/oauth"VS Code.vscode/mcp.json or MCP: Open User Configuration
{
"servers" : {
"onesignal" : {
"type" : "http" ,
"url" : "https://api.onesignal.com/mcp/oauth"
}
}
}What it does
OneSignal MCP Server is a hosted endpoint run by OneSignal at https://api.onesignal.com/mcp/oauth. An AI client connects to it over HTTP and signs in with a OneSignal account, then can work on the apps that account is allowed to manage, with no per-app configuration; list_apps finds the app IDs.
Its 43 tools cover sending and reviewing push, email and SMS messages, looking up and editing users, aliases and subscriptions, managing templates and segments, starting and updating iOS Live Activities, exporting subscribers or audience activity to CSV, creating and listing custom events, checking email domain DNS and inbox-provider deliverability, planning and applying IP or domain warmup schedules, and reading outcome analytics. Four utility tools report health, configuration and a reference overview.
Sign-in uses OAuth 2.0 with PKCE (S256) and dynamic client registration: the endpoint's authorization-server metadata publishes a registration endpoint at https://api.onesignal.com/oauth/register and sends the user to dashboard.onesignal.com to approve access. That is why OneSignal's docs tell users to leave the OAuth client ID and secret fields blank in Claude's custom connector form; filling them makes the connection fail.
The server is part of OneSignal AI, which OneSignal marks as beta. It is listed in the Claude connectors directory, the Cursor Marketplace and the OpenAI / ChatGPT plugins directory.
What it needs
A OneSignal account with access to the apps you want to manage, and permission to approve access through OneSignal's browser sign-in. An MCP client that supports remote HTTP servers with OAuth sign-in. In Claude Code, finish sign-in from the /mcp panel (select onesignal, then Authenticate). During the open beta, OneSignal may need to enable an app before its non-utility tools work.
Limits
Remote only: clients that can run only local stdio servers cannot connect, and there is no package to run yourself. During the open beta, tools other than the utility ones may stay unavailable until OneSignal enables the app. Tool calls are rate limited and count against the account's normal OneSignal API usage limits. send_message accepts one targeting method per send and caps the number of filters. The server itself costs nothing extra; the AI client may have its own costs.
Who it suits
Teams already on OneSignal who want to look up users, check delivery and deliverability, build segments or send messages from Claude, Cursor, ChatGPT, Codex or VS Code without opening the dashboard. Because it is OneSignal's own hosted server with OAuth, there is no API key to store, and access can be revoked per client. It acts with the full permissions of the person who signs in, across every app they can reach, and can send real messages, so give it to people already trusted to send campaigns. Pick something else if your client supports only local stdio servers or you need to run the server inside your own network.
Tools 43
list_apps- List the OneSignal apps the signed-in user can reach
send_message- Send a push notification, email or SMS
list_messages- List recent notifications
view_message- Show one notification with its delivery figures
view_user- Find a user by alias
get_user_identity- Return a user's identity aliases
get_user_identity_by_subscription- Return identity aliases from a subscription ID
create_user- Create a user with properties
update_user- Change a user's properties such as tags or language
create_or_update_alias- Add or change identity aliases on a user
create_alias_by_subscription- Add aliases using a subscription ID
create_subscription- Attach a push, email or SMS subscription to a user
update_subscription- Change an existing subscription
update_subscription_by_token- Change a subscription found by its token
unsubscribe_email- Unsubscribe an email address
transfer_subscription- Move a subscription to another user
list_templates- List message templates
get_template- Show one template
create_template- Create a template
update_template- Change a template
list_segments- List segments
get_segment- Show a segment and its filters
create_segment- Create a segment from audience filters
update_segment- Change a segment
start_live_activity- Start an iOS Live Activity
update_live_activity- Update or end a Live Activity
export_subscriptions_csv- Export subscriptions to a CSV file
export_audience_activity_csv- Export a notification's audience activity to CSV
create_custom_events- Record custom events for users
get_custom_events- List indexed custom event definitions
get_email_domains- Check SPF, DKIM and DMARC status of sending domains
get_email_reputation- Show app-wide bounce and spam complaint rates
get_provider_metrics- Deliverability figures per inbox provider for a domain
get_provider_metrics_timeseries- Provider deliverability figures over time
check_send_volume- Tell whether a send needs IP or domain warmup
estimate_recipient_count- Estimate recipients from segments and filters
recommended_warm_up_schedule- Suggest a staged warmup schedule
apply_warm_up_schedule- Apply a warmup schedule to a draft campaign
get_active_warm_up_schedules- List warmup schedules in progress
view_outcomes- Read outcome analytics
onesignal_health- Check that the server is reachable
onesignal_config- Show the server's configuration
onesignal_reference_overview- Give a reference summary of all tools