usefulapi

Svix MCP server. Send and debug webhooks — applications, endpoints, messages, delivery attempts and replays.

Claude

Open Settings → Connectors → Add custom connector
Paste this URL:
https://svix.usefulapi.io/mcp
Authenticate with Svix when prompted

Cursor · VS Code · Windsurf · Cline

Add to your MCP config, then reload & authorize:

{
  "mcpServers": {
    "svix": {
      "url": "https://svix.usefulapi.io/mcp"
    }
  }
}

live19 toolsFree 100 tool calls / monthPro $9/mo · $90/yr

Tools 19

Tool	Type	What it does
`svix_list_applications`	read	List applications List the applications (your tenants/customers) in the Svix environment. Svix REST: GET /api/v1/app.
`svix_get_application`	read	Get one application Fetch a single application by its Svix id or your own uid. Svix REST: GET /api/v1/app/{app_id}.
`svix_list_endpoints`	read	List endpoints List the webhook endpoints registered for one application. Svix REST: GET /api/v1/app/{app_id}/endpoint.
`svix_get_endpoint`	read	Get one endpoint Fetch a single webhook endpoint, including its URL, subscribed event types and channels. Svix REST: GET /api/v1/app/{app_id}/endpoint/{endpoint_id}.
`svix_get_endpoint_stats`	read	Get endpoint delivery stats Read delivery statistics for one endpoint — counts of success, pending, sending and fail. The fastest way to see whether an endpoint is healthy. Svix REST: GET /api/v1/app/{app_id}/endpoint/{endpoint_id}/stats.
`svix_list_messages`	read	List messages List the webhook messages sent for one application, newest first. Filter by event type, channel, tag or time window. Svix REST: GET /api/v1/app/{app_id}/msg.
`svix_get_message`	read	Get one message Fetch a single message, including its event type and payload. Svix REST: GET /api/v1/app/{app_id}/msg/{msg_id}.
`svix_list_attempts_by_message`	read	List delivery attempts for a message List every delivery attempt Svix made for one message, across endpoints — status, response code and body. This is the tool for answering 'why did this webhook not arrive?'. Svix REST: GET /api/v1/app/{app_id}/attempt/msg/{msg_id}.
`svix_list_attempts_by_endpoint`	read	List delivery attempts for an endpoint List delivery attempts against one endpoint, newest first. Filter by status to find the failures. Svix REST: GET /api/v1/app/{app_id}/attempt/endpoint/{endpoint_id}.
`svix_list_endpoint_messages`	read	List messages for an endpoint List the messages destined for one endpoint, with each message's delivery status. Svix REST: GET /api/v1/app/{app_id}/endpoint/{endpoint_id}/msg.
`svix_list_event_types`	read	List event types List the event types defined in the environment — the catalogue endpoints can subscribe to. Svix REST: GET /api/v1/event-type.
`svix_get_event_type`	read	Get one event type Fetch a single event type by name, including its description and JSON schema. Svix REST: GET /api/v1/event-type/{event_type_name}.
`svix_list_background_tasks`	read	List background tasks List Svix background tasks (bulk replays, expunges, imports) with their status. Use it to follow up a recover or replay. Svix REST: GET /api/v1/background-task.
`svix_health`	read	Check API health Check that the Svix API is reachable and the API key works. Returns 200 with an empty body when healthy. Svix REST: GET /api/v1/health.
`svix_create_application`	write	Create an application Create a new application (one tenant/customer of yours) in the Svix environment. Svix REST: POST /api/v1/app.
`svix_create_endpoint`	write	Create an endpoint Register a webhook endpoint URL for one application, optionally scoped to specific event types and channels. Svix REST: POST /api/v1/app/{app_id}/endpoint.
`svix_send_message`	write	Send a message Send a webhook message to every endpoint of an application subscribed to the event type. This delivers real traffic to your customers' URLs. Svix REST: POST /api/v1/app/{app_id}/msg.
`svix_resend_message`	write	Resend a message to one endpoint Queue one message for redelivery to one endpoint. The usual fix after a customer's endpoint was down. Svix REST: POST /api/v1/app/{app_id}/msg/{msg_id}/endpoint/{endpoint_id}/resend.
`svix_recover_endpoint`	write	Recover an endpoint's failed messages Replay every failed message for one endpoint since a timestamp. Runs as a background task — follow it with svix_list_background_tasks. Svix REST: POST /api/v1/app/{app_id}/endpoint/{endpoint_id}/recover.

Pricing

Plan	Price	Limit
Free	$0	100 tool calls / month
Pro	$9/mo · $90/yr	Unlimited

This is a Model Context Protocol endpoint — meant to be connected from an AI client, not opened in a browser. An invalid_token response at the URL is the auth gate working as designed; clients authenticate automatically.