> ## Documentation Index > Fetch the complete documentation index at: https://withforerunner.com/docs/llms.txt > Use this file to discover all available pages before exploring further. # Update SI/SD > Updates an SI/SD record and recomputes the property's threshold warnings. Every field is optional, but send at least one. `address`, `parcelId`, `coordinates`, and `externalSystemId` will not move the record — delete it and resubmit to change where it is attached. Account-specific identifiers your community requires may be sent as extra top-level fields. Updating an id that does not exist returns a 400 with `Improvement not found`, not a 404. ## OpenAPI ````yaml /developers/v1/openapi.json patch /api/v1/sisd/{id} openapi: 3.1.0 info: title: Forerunner Integration API v1 version: 1.0.0 description: >- Read and write floodplain data in Forerunner. This is the v1 contract; each version is documented separately and evolves on its own. v1 is the current version. It covers files, properties, records, and SI/SD, and is the one to build against. Its record endpoints handle `Log` records only; use v2 for any other record type. Every request needs an `Authorization: Bearer ` header. List endpoints return 25 results per page; page through them with `page` and read `pageInfo` for the totals. Every JSON response carries an `errors` array, empty when the request succeeded; the `401`, `403`, and `429` responses are plain text or HTML instead. Develop against the staging server, which is a separate account with separate API keys and separate data. Requests are rate limited per IP at the CDN. A request over the limit is answered with a `429` and an HTML body, not the JSON error shape. servers: - url: https://app.withforerunner.com description: Production - url: https://app.staging.withforerunner.com description: Staging, for development and testing security: - bearerAuth: [] tags: - name: Files description: >- Upload, retrieve, and update documents such as Elevation Certificates and permits. - name: Properties description: Query the properties in your account. - name: Records description: >- Read, create, update, and delete `Log` records. Other record types are available on v2. - name: SI/SD description: >- Track substantial improvement and substantial damage against your community's thresholds. paths: /api/v1/sisd/{id}: patch: tags: - SI/SD summary: Update SI/SD description: >- Updates an SI/SD record and recomputes the property's threshold warnings. Every field is optional, but send at least one. `address`, `parcelId`, `coordinates`, and `externalSystemId` will not move the record — delete it and resubmit to change where it is attached. Account-specific identifiers your community requires may be sent as extra top-level fields. Updating an id that does not exist returns a 400 with `Improvement not found`, not a 404. operationId: updateSISD parameters: - name: id in: path required: true description: UUID of the resource in Forerunner. schema: type: string format: uuid example: f8a3b2c1-d4e5-4789-abcd-ef0123456789 requestBody: required: true content: application/json: schema: type: object properties: type: type: string enum: - improvement - damage description: Whether this records an improvement or damage. example: damage value: type: number minimum: 0 description: Cost of the improvement or damage, in dollars. example: 125000 propertyMarketValue: description: >- Market value of the structure before the improvement or damage, in dollars. example: 200000 type: number minimum: 0 description: description: What the improvement or damage was. Send `null` to clear it. example: Flood damage from March storm type: - string - 'null' date: type: string description: >- When the improvement or damage occurred. Accepts ISO 8601 (`2024-03-15`) or `MM/DD/YYYY` (`03/15/2024`). example: '2024-03-15' additionalProperties: {} responses: '200': description: Success. `errors` is empty. content: application/json: schema: $ref: '#/components/schemas/V1UpdateSISDResponse' example: errors: [] sisd: id: a1b2c3d4-e5f6-4890-abcd-ef1234567890 property: warnings: - message: >- The damage costs recorded for this property meet or exceed your community's Substantial Damage threshold. Further action might be necessary to ensure compliance. '400': description: The request failed validation. `errors` names each field at fault. content: application/json: schema: anyOf: - $ref: '#/components/schemas/V1UpdateSISDResponse' - $ref: '#/components/schemas/APIResponse' example: errors: - message: Invalid UUID format for id parameter field: id sisd: null property: null '401': description: >- Missing or invalid API key. The body is plain text, not the JSON error shape. '403': description: >- Blocked by our web application firewall, which answers with an HTML body rather than the JSON error shape. Most often caused by a client sending a `PostmanRuntime`, `python-requests`, or `HeadlessChrome` `User-Agent`; clear that header and retry. '429': description: >- Too many requests from your IP. Rate limiting is applied at the CDN, so the body is HTML rather than the JSON error shape. Back off and retry. components: schemas: V1UpdateSISDResponse: type: object properties: errors: type: array items: $ref: '#/components/schemas/APIError' description: >- Empty when the request succeeded. Otherwise one entry per failure, and the resource fields on the response are empty: `null` for single resources, `[]` for lists, with `pageInfo` omitted. example: [] sisd: anyOf: - $ref: '#/components/schemas/V1SISDReference' - type: 'null' description: The updated SI/SD record. Null when the update failed. property: anyOf: - $ref: '#/components/schemas/V1SISDPropertyWarnings' - type: 'null' description: Threshold warnings for the property this record was saved against. required: - errors - sisd - property additionalProperties: false APIResponse: type: object properties: errors: type: array items: $ref: '#/components/schemas/APIError' description: >- Empty when the request succeeded. Otherwise one entry per failure, and the resource fields on the response are empty: `null` for single resources, `[]` for lists, with `pageInfo` omitted. example: [] required: - errors additionalProperties: false description: Every response carries an `errors` array alongside its resource fields. APIError: type: object properties: message: type: string description: Human-readable description of what went wrong. example: Required field: type: string description: The request field that caused the error, as a dot-separated path. example: data.type required: - message - field additionalProperties: false description: A single validation or processing failure. V1SISDReference: type: object properties: id: type: string description: UUID of the SI/SD record. example: a1b2c3d4-e5f6-4890-abcd-ef1234567890 required: - id additionalProperties: false V1SISDPropertyWarnings: type: object properties: warnings: type: array items: type: object properties: message: type: string description: The warning text. example: >- The damage costs recorded for this property meet or exceed your community's Substantial Damage threshold. Further action might be necessary to ensure compliance. required: - message additionalProperties: false description: >- Threshold warnings raised for the property after this record was saved. Empty when no threshold was met. required: - warnings additionalProperties: false description: Compliance warnings for the property this record was saved against. securitySchemes: bearerAuth: type: http scheme: bearer description: >- Your account's API key, sent as `Authorization: Bearer `. Keys are issued per environment, so a staging key will not work against production. ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.