Trigger a tool execution from an external webhook (Stripe, GitHub, etc.).

The request body becomes the tool's input payload. Returns 202 Accepted immediately and executes the tool asynchronously.

Also handles webhook challenge/verification patterns inline:

• monday.com, Slack: POST body { challenge: "..." } → echoes challenge as JSON
• Generic: POST body { verification_token: "...", type: "verification" } → echoes token as JSON

superglue authenticates access to this endpoint, but does not validate provider-specific HMAC signatures in the incoming payload.

{
  "id": "evt_1234",
  "type": "customer.created",
  "data": {
    "object": {
      "id": "cus_abc123",
      "email": "user@example.com"
    }
  }
}