---
title: "Create a new IP address
Position is automatically assigned to the end of the host's IP address list."
method: POST
path: "/api/v1/ip-addresses"
tags: ["IP Addresses"]
---

# Create a new IP address
Position is automatically assigned to the end of the host's IP address list.

`POST /api/v1/ip-addresses`

## Request body

- IPAddress
  - `host_id` string, uuid, required
  - `ip_address` string, required
  - `mac_address` string, nullable — MAC address discovered from ARP, SNMP, or Docker - immutable once set
  - `name` string, nullable, required
  - `network_id` string, uuid, required
  - `position` integer — Position of this IP address in the host's IP address list (for ordering)
  - `subnet_id` string, uuid, required
  - `created_at` string, date-time, required
  - `first_discovery_id` string, uuid, nullable
  - `id` string, uuid, required
  - `last_discovery_id` string, uuid, nullable
  - `last_seen_at` string, date-time
  - `lineage_id` string, uuid, nullable
  - `updated_at` string, date-time, required
  - `valid_from` string, date-time
  - `valid_to` string, date-time, nullable

## Response `200`

IP address created successfully

- ApiResponseIPAddress
  - `data` object
    - `host_id` string, uuid, required
    - `ip_address` string, required
    - `mac_address` string, nullable — MAC address discovered from ARP, SNMP, or Docker - immutable once set
    - `name` string, nullable, required
    - `network_id` string, uuid, required
    - `position` integer — Position of this IP address in the host's IP address list (for ordering)
    - `subnet_id` string, uuid, required
    - `created_at` string, date-time, required
    - `first_discovery_id` string, uuid, nullable
    - `id` string, uuid, required
    - `last_discovery_id` string, uuid, nullable
    - `last_seen_at` string, date-time
    - `lineage_id` string, uuid, nullable
    - `updated_at` string, date-time, required
    - `valid_from` string, date-time
    - `valid_to` string, date-time, nullable
  - `error` string, nullable
  - `meta` ApiMeta, required — API metadata included in all responses
    - `api_version` integer, required — API version (integer, increments on breaking changes)
    - `server_version` string, required — Server version (semver)
  - `success` boolean, required

## Other responses

- `400` — Network mismatch or invalid request

## Changes

- **2026-05-03** `d38c20597ec1` — 6 info
  - added the optional property `data/allOf[subschema #2]/first_discovery_id` to the response with the `200` status
  - added the optional property `data/allOf[subschema #2]/last_discovery_id` to the response with the `200` status
  - added the optional property `data/allOf[subschema #2]/last_seen_at` to the response with the `200` status
  - added the optional property `data/allOf[subschema #2]/lineage_id` to the response with the `200` status
  - …2 more
- **2026-04-20** `f04499e2280f` — 6 warning
  - removed the optional property `data/allOf[subschema #2]/first_discovery_id` from the response with the `200` status
  - removed the optional property `data/allOf[subschema #2]/last_discovery_id` from the response with the `200` status
  - removed the optional property `data/allOf[subschema #2]/last_seen_at` from the response with the `200` status
  - removed the optional property `data/allOf[subschema #2]/lineage_id` from the response with the `200` status
  - …2 more

[Change history](https://skmtc.dev/scanopy/apis/scanopy-api/changes/api/v1/ip-addresses/post.md)

---

[API](https://skmtc.dev/scanopy/apis/scanopy-api.md) · [All operations](https://skmtc.dev/scanopy/apis/scanopy-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/scanopy/scanopy-api/revisions/87fbc9fdb32c/schema)