---
title: "Previsualizar importación"
description: "Valida y previsualiza las filas cargadas sin modificar el catálogo. Devuelve mapeos, conteos, campos faltantes y ejemplos de filas omitidas."
language: es-MX
canonical_url: "https://exac.mx/docs/api/catalog/imports/preview-import"
md_url: "https://exac.mx/docs/api/catalog/imports/preview-import.md"
---

# Previsualizar importación

Valida y previsualiza las filas cargadas sin modificar el catálogo. Devuelve mapeos, conteos, campos faltantes y ejemplos de filas omitidas.

## Solicitud

`POST /v1/imports/uploads/{uploadRef}/preview`

- **Autorización:** Permiso requerido: `imports:read`.

- **Entornos:** Solo producción

- **Idempotencia:** No requerida

## Contrato canónico para máquinas

Este fragmento se genera desde la operación canónica y los contratos Zod que utiliza la ruta.

```json
{
  "method": "POST",
  "path": "/v1/imports/uploads/{uploadRef}/preview",
  "operation": {
    "operationId": "previewImport",
    "tags": [
      "Imports"
    ],
    "summary": "Previsualizar importación",
    "description": "Valida y previsualiza las filas cargadas sin modificar el catálogo. Devuelve mapeos, conteos, campos faltantes y ejemplos de filas omitidas.",
    "security": [
      {
        "bearerAuth": []
      }
    ],
    "servers": [
      {
        "url": "https://adventurous-moose-616.convex.site",
        "description": "Despliegue actual de producción de la API de Exac"
      }
    ],
    "parameters": [
      {
        "name": "uploadRef",
        "in": "path",
        "required": true,
        "schema": {
          "type": "string",
          "pattern": "^upload:",
          "description": "Opaque uploadRef returned when an import upload is prepared"
        }
      }
    ],
    "requestBody": {
      "required": false,
      "content": {
        "application/json": {
          "schema": {
            "type": "object",
            "properties": {},
            "additionalProperties": false
          },
          "example": {}
        }
      }
    },
    "responses": {
      "200": {
        "description": "Operación completada.",
        "headers": {
          "Request-Id": {
            "$ref": "#/components/headers/RequestId"
          }
        },
        "content": {
          "application/json": {
            "schema": {
              "type": "object",
              "properties": {
                "data": {
                  "type": "object",
                  "properties": {
                    "fileRows": {
                      "type": "number"
                    },
                    "sourceFormat": {
                      "type": "string",
                      "enum": [
                        "xml",
                        "csv",
                        "excel",
                        "html",
                        "database",
                        "unknown"
                      ]
                    },
                    "sourceSoftware": {
                      "type": "string"
                    },
                    "totalRows": {
                      "type": "number"
                    },
                    "validRows": {
                      "type": "number"
                    },
                    "skippedRows": {
                      "type": "number"
                    },
                    "newRows": {
                      "type": "number"
                    },
                    "updateRows": {
                      "type": "number"
                    },
                    "sourceColumns": {
                      "type": "array",
                      "items": {
                        "type": "string"
                      }
                    },
                    "fieldMappings": {
                      "type": "array",
                      "items": {
                        "type": "object",
                        "properties": {
                          "fieldKey": {
                            "type": "string"
                          },
                          "label": {
                            "type": "string"
                          },
                          "kind": {
                            "type": "string",
                            "enum": [
                              "text",
                              "number",
                              "money",
                              "boolean"
                            ]
                          },
                          "required": {
                            "type": "boolean"
                          },
                          "important": {
                            "type": "boolean"
                          },
                          "sourceColumn": {
                            "type": "string"
                          },
                          "status": {
                            "type": "string",
                            "enum": [
                              "mapped",
                              "missing"
                            ]
                          }
                        },
                        "required": [
                          "fieldKey",
                          "label",
                          "kind",
                          "required",
                          "important",
                          "status"
                        ],
                        "additionalProperties": false
                      }
                    },
                    "unmappedSourceColumns": {
                      "type": "array",
                      "items": {
                        "type": "string"
                      }
                    },
                    "missingRequiredFields": {
                      "type": "array",
                      "items": {
                        "type": "string"
                      }
                    },
                    "missingImportantFields": {
                      "type": "array",
                      "items": {
                        "type": "string"
                      }
                    },
                    "sampleRows": {
                      "type": "array",
                      "items": {
                        "type": "object",
                        "propertyNames": {
                          "type": "string"
                        },
                        "additionalProperties": {}
                      }
                    },
                    "skippedSamples": {
                      "type": "array",
                      "items": {}
                    },
                    "duplicateSamples": {
                      "type": "array",
                      "items": {}
                    },
                    "duplicateCodeRows": {
                      "type": "number"
                    },
                    "duplicateDescriptionRows": {
                      "type": "number"
                    },
                    "duplicateSourceKeyRows": {
                      "type": "number"
                    },
                    "duplicateCodeSamples": {
                      "type": "array",
                      "items": {}
                    },
                    "duplicateSourceKeySamples": {
                      "type": "array",
                      "items": {}
                    },
                    "hasPrices": {
                      "type": "boolean"
                    },
                    "hasStock": {
                      "type": "boolean"
                    },
                    "fiscalReadyRows": {
                      "type": "number"
                    }
                  },
                  "required": [
                    "fileRows",
                    "sourceFormat",
                    "totalRows",
                    "validRows",
                    "skippedRows",
                    "newRows",
                    "updateRows",
                    "sourceColumns",
                    "fieldMappings",
                    "unmappedSourceColumns",
                    "missingRequiredFields",
                    "missingImportantFields",
                    "sampleRows",
                    "skippedSamples"
                  ],
                  "additionalProperties": false
                }
              },
              "required": [
                "data"
              ],
              "additionalProperties": false
            },
            "example": {
              "data": {
                "fileRows": 10,
                "sourceFormat": "xml",
                "totalRows": 10,
                "validRows": 10,
                "skippedRows": 0,
                "newRows": 8,
                "updateRows": 2,
                "sourceColumns": [
                  "description",
                  "price"
                ],
                "fieldMappings": [],
                "unmappedSourceColumns": [],
                "missingRequiredFields": [],
                "missingImportantFields": [],
                "sampleRows": [],
                "skippedSamples": []
              }
            }
          }
        }
      },
      "400": {
        "description": "Solicitud inválida.\n\n`validation_error`",
        "headers": {
          "Request-Id": {
            "$ref": "#/components/headers/RequestId"
          }
        },
        "content": {
          "application/json": {
            "schema": {
              "$ref": "#/components/schemas/ApiError"
            }
          }
        }
      },
      "401": {
        "description": "Credencial inválida o ausente.\n\n`unauthenticated`",
        "headers": {
          "Request-Id": {
            "$ref": "#/components/headers/RequestId"
          },
          "WWW-Authenticate": {
            "$ref": "#/components/headers/WWWAuthenticate"
          }
        },
        "content": {
          "application/json": {
            "schema": {
              "$ref": "#/components/schemas/ApiError"
            }
          }
        }
      },
      "403": {
        "description": "La credencial no incluye el permiso `imports:read`.\n\n`forbidden`",
        "headers": {
          "Request-Id": {
            "$ref": "#/components/headers/RequestId"
          },
          "WWW-Authenticate": {
            "$ref": "#/components/headers/WWWAuthenticate"
          }
        },
        "content": {
          "application/json": {
            "schema": {
              "$ref": "#/components/schemas/ApiError"
            }
          }
        }
      },
      "404": {
        "description": "Recurso no encontrado.\n\n`not_found`",
        "headers": {
          "Request-Id": {
            "$ref": "#/components/headers/RequestId"
          }
        },
        "content": {
          "application/json": {
            "schema": {
              "$ref": "#/components/schemas/ApiError"
            }
          }
        }
      },
      "405": {
        "description": "Método no permitido.\n\n`method_not_allowed`",
        "headers": {
          "Request-Id": {
            "$ref": "#/components/headers/RequestId"
          },
          "Allow": {
            "$ref": "#/components/headers/Allow"
          }
        },
        "content": {
          "application/json": {
            "schema": {
              "$ref": "#/components/schemas/ApiError"
            }
          }
        }
      },
      "429": {
        "description": "Demasiadas solicitudes.\n\n`rate_limited`",
        "headers": {
          "Request-Id": {
            "$ref": "#/components/headers/RequestId"
          },
          "Retry-After": {
            "$ref": "#/components/headers/RetryAfter"
          }
        },
        "content": {
          "application/json": {
            "schema": {
              "$ref": "#/components/schemas/ApiError"
            }
          }
        }
      },
      "500": {
        "description": "Error interno del servidor.\n\n`internal`",
        "headers": {
          "Request-Id": {
            "$ref": "#/components/headers/RequestId"
          }
        },
        "content": {
          "application/json": {
            "schema": {
              "$ref": "#/components/schemas/ApiError"
            }
          }
        }
      },
      "503": {
        "description": "Servicio temporalmente no disponible.\n\n`provider_unavailable`",
        "headers": {
          "Request-Id": {
            "$ref": "#/components/headers/RequestId"
          },
          "Retry-After": {
            "$ref": "#/components/headers/RetryAfter"
          }
        },
        "content": {
          "application/json": {
            "schema": {
              "$ref": "#/components/schemas/ApiError"
            }
          }
        }
      }
    },
    "x-exac-environments": [
      "production"
    ]
  },
  "components": {
    "schemas": {
      "ApiError": {
        "type": "object",
        "properties": {
          "error": {
            "$ref": "#/components/schemas/ProgrammaticError"
          }
        },
        "required": [
          "error"
        ],
        "additionalProperties": false
      },
      "ProgrammaticError": {
        "type": "object",
        "properties": {
          "code": {
            "type": "string",
            "enum": [
              "validation_error",
              "unauthenticated",
              "forbidden",
              "not_found",
              "method_not_allowed",
              "conflict",
              "idempotency_conflict",
              "operation_in_progress",
              "recovery_required",
              "rate_limited",
              "provider_unavailable",
              "internal"
            ],
            "description": "Acción recomendada por código:\n\n- `validation_error` — Corrige cada elemento de details.issues usando su path y código estable.\n- `unauthenticated` — Proporciona una API key o un token de acceso OAuth válido.\n- `forbidden` — Usa una credencial con el permiso requerido.\n- `not_found` — Verifica el identificador del recurso dentro de la organización.\n- `method_not_allowed` — Usa el método HTTP documentado.\n- `conflict` — Actualiza el recurso y resuelve su estado actual.\n- `idempotency_conflict` — Usa otra clave de idempotencia para una solicitud modificada.\n- `operation_in_progress` — Espera el tiempo de Retry-After y repite la misma solicitud.\n- `recovery_required` — No reintentes automáticamente; reconcilia el resultado del proveedor.\n- `rate_limited` — Espera el tiempo de Retry-After antes de reintentar.\n- `provider_unavailable` — Reintenta solo cuando la respuesta marque la falla como reintentable.\n- `internal` — Reintenta después y contacta a soporte si el error persiste."
          },
          "message": {
            "type": "string"
          },
          "details": {
            "type": "object",
            "properties": {
              "issues": {
                "type": "array",
                "items": {
                  "type": "object",
                  "properties": {
                    "path": {
                      "type": "array",
                      "items": {
                        "anyOf": [
                          {
                            "type": "string"
                          },
                          {
                            "type": "number"
                          }
                        ]
                      }
                    },
                    "message": {
                      "type": "string"
                    },
                    "code": {
                      "type": "string"
                    }
                  },
                  "required": [
                    "path",
                    "message"
                  ],
                  "additionalProperties": false
                }
              },
              "retryable": {
                "type": "boolean"
              },
              "retryAfterSeconds": {
                "type": "integer",
                "exclusiveMinimum": 0,
                "maximum": 9007199254740991
              }
            },
            "additionalProperties": false
          },
          "status": {
            "type": "integer",
            "minimum": -9007199254740991,
            "maximum": 9007199254740991
          }
        },
        "required": [
          "code",
          "message",
          "status"
        ],
        "additionalProperties": false
      }
    }
  }
}
```

[OpenAPI 3.1](/openapi.json)

Documentación completa: https://exac.mx/docs.md
Índice para agentes: https://exac.mx/docs/llms.txt