---
updatedAt: 2026-07-06T22:41:25.000Z
agentTools:
  projectIndex: https://docs.nmi.com/llms.txt
---

# Merchant: Stopped Processing

This event is triggered when a merchant stops processing transactions.

# OpenAPI definition

````json
{
  "openapi": "3.1.0",
  "info": {
    "title": "Payments Sign-Up API",
    "description": "Payments Sign-Up API",
    "version": "1.0.0",
    "license": {
      "name": "Proprietary",
      "url": "https://api.nmipayments.com/license"
    }
  },
  "servers": [
    {
      "url": "https://sandbox.signup.nmi.com/api/v1",
      "description": "Sandbox"
    },
    {
      "url": "https://secure.nmi.com/api/v5/signup",
      "description": "Production"
    }
  ],
  "tags": [
    {
      "name": "Webhook Events",
      "description": "### Webhook Events Information\n#### Verifying the signature of incoming webhooks\nThis package assumes that an incoming webhook request has a Signature header that can be used to verify the payload has not been tampered with. This is how the signature can be validated.\n```computedSignature = hash_hmac('sha256', [CONTENT], [CONFIGURED SIGNING SECRET]);```\n"
    }
  ],
  "webhooks": {
    "merchant.processing.stop": {
      "post": {
        "tags": [
          "Webhook Events"
        ],
        "summary": "Merchant: Stopped Processing",
        "description": "This event is triggered when a merchant stops processing transactions.",
        "operationId": "sendMerchantProcessingStopEvent",
        "security": [],
        "requestBody": {
          "content": {
            "application/json": {
              "schema": {
                "type": "object",
                "properties": {
                  "event_id": {
                    "type": "string",
                    "maxLength": 36,
                    "example": "38cf9efa-8aec-4a4e-98e2-6bb2411fdc60"
                  },
                  "event_type": {
                    "allOf": [
                      {
                        "$ref": "#/components/schemas/event-types"
                      },
                      {
                        "example": "merchant.processing.stop"
                      }
                    ]
                  },
                  "event_body": {
                    "type": "object",
                    "required": [
                      "mid",
                      "dba"
                    ],
                    "properties": {
                      "mid": {
                        "type": "string",
                        "maxLength": 30,
                        "example": "1234000000000011"
                      },
                      "dba": {
                        "type": "string",
                        "maxLength": 255,
                        "example": "Network Merchant Inc"
                      }
                    }
                  }
                }
              },
              "examples": {
                "eventExample": {
                  "summary": "Merchant Processing Stop",
                  "description": "This is an example of a webhook payload when a merchant stops processing transactions.",
                  "value": {
                    "event_id": "38cf9efa-8aec-4a4e-98e2-6bb2411fdc60",
                    "event_type": "merchant.processing.stop",
                    "event_body": {
                      "mid": "1234000000000011",
                      "dba": "Network Merchant Inc"
                    }
                  }
                }
              }
            }
          }
        }
      }
    }
  },
  "components": {
    "schemas": {
      "event-types": {
        "type": "string",
        "enum": [
          "application.updated.data.requested",
          "application.approved",
          "application.declined",
          "application.cancelled",
          "application.merchant.closed",
          "application.merchant.boarded",
          "merchant.chargeback.added",
          "merchant.deposit.new",
          "merchant.first-batch",
          "merchant.processing.start",
          "merchant.processing.stop",
          "merchant.residuals.published",
          "merchant.retrieval.added",
          "merchant.statement.new"
        ],
        "example": "application.merchant.boarded"
      }
    }
  }
}
````