diff --git a/CHANGELOG.md b/CHANGELOG.md
index 76c646c..a04a9bb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,12 @@
 
 ### Unreleased
 
+
+### [3.0.0-alpha.4] - 2024-03-05
+
+- feat(lib/nameserver): added, with tests
+
+
 ### 3.0.0-alpha.3
 
 - routes/permission: added GET, POST, DELETE
@@ -14,3 +20,4 @@
 
 
 [3.0.0-alpha.3]: https://github.com/NicTool/api/releases/tag/3.0.0-alpha.3
+[3.0.0-alpha.4]: https://github.com/NicTool/api/releases/tag/3.0.0-alpha.4
diff --git a/lib/nameserver.js b/lib/nameserver.js
new file mode 100644
index 0000000..682a044
--- /dev/null
+++ b/lib/nameserver.js
@@ -0,0 +1,125 @@
+import Mysql from './mysql.js'
+import { mapToDbColumn } from './util.js'
+
+const nsDbMap = { id: 'nt_nameserver_id', gid: 'nt_group_id' }
+const boolFields = ['deleted', 'export_serials']
+
+class Nameserver {
+  constructor() {
+    this.mysql = Mysql
+  }
+
+  async create(args) {
+    if (args.id) {
+      const g = await this.get({ id: args.id })
+      if (g.length === 1) return g[0].id
+    }
+
+    if (args.export.type) {
+      const rows = await Mysql.execute(...Mysql.select('SELECT id FROM nt_nameserver_export_type', { name: args.export.type }))
+      args.export_type_id = rows[0].id
+      delete args.export.type
+    }
+
+    return await Mysql.execute(
+      ...Mysql.insert(`nt_nameserver`, mapToDbColumn(objectToDb(args), nsDbMap)),
+    )
+  }
+
+  async get(args) {
+    if (args.name !== undefined) {
+      args['ns.name'] = args.name
+      delete args.name
+    }
+    const rows = await Mysql.execute(
+      ...Mysql.select(
+        `SELECT ns.nt_nameserver_id AS id
+        , ns.nt_group_id AS gid
+        , ns.name
+        , ns.ttl
+        , ns.description
+        , ns.address
+        , ns.address6
+        , ns.remote_login
+        , ns.logdir
+        , ns.datadir
+        , ns.export_interval
+        , ns.export_serials
+        , ns.export_status
+        , ns.deleted
+        , t.name AS export_type
+      FROM nt_nameserver ns
+      JOIN nt_nameserver_export_type t ON ns.export_type_id=t.id`,
+        mapToDbColumn(args, nsDbMap),
+      ),
+    )
+    for (const r of rows) {
+      for (const b of boolFields) {
+        r[b] = r[b] === 1
+      }
+    }
+    return dbToObject(rows)
+  }
+
+  async put(args) {
+    if (!args.id) return false
+    const id = args.id
+    delete args.id
+    // Mysql.debug(1)
+    const r = await Mysql.execute(
+      ...Mysql.update(
+        `nt_nameserver`,
+        `nt_nameserver_id=${id}`,
+        mapToDbColumn(args, nsDbMap),
+      ),
+    )
+    // console.log(r)
+    return r.changedRows === 1
+  }
+
+  async delete(args) {
+    await Mysql.execute(`UPDATE nt_nameserver SET deleted=? WHERE nt_nameserver_id=?`, [
+      args.deleted ?? 1,
+      args.id,
+    ])
+    return true
+  }
+
+  async destroy(args) {
+    return await Mysql.execute(
+      ...Mysql.delete(`nt_nameserver`, { nt_nameserver_id: args.id }),
+    )
+  }
+}
+
+export default new Nameserver()
+
+
+function dbToObject(rows) {
+  for (const row of rows) {
+    for (const f of ['export']) {
+      for (const p of ['type', 'interval', 'serials', 'status']) {
+        if (row[`${f}_${p}`] !== undefined) {
+          if (row[f] === undefined) row[f] = {}
+          row[f][p] = row[`${f}_${p}`]
+          delete row[`${f}_${p}`]
+        }
+      }
+    }
+  }
+  return rows
+}
+
+function objectToDb(row) {
+  const newRow = JSON.parse(JSON.stringify(row))
+  for (const f of ['export']) {
+    for (const p of ['interval', 'serials', 'status']) {
+      if (newRow[f] === undefined) continue
+      if (newRow[f][p] === undefined) continue
+      newRow[`${f}_${p}`] = newRow[f][p]
+      delete newRow[f][p]
+    }
+    delete newRow[f]
+  }
+  return newRow
+}
diff --git a/lib/nameserver.test.js b/lib/nameserver.test.js
new file mode 100644
index 0000000..8e91b1e
--- /dev/null
+++ b/lib/nameserver.test.js
@@ -0,0 +1,44 @@
+import assert from 'node:assert/strict'
+import { describe, it, after, before } from 'node:test'
+
+import Nameserver from './nameserver.js'
+
+import testCase from './test/nameserver.json' with { type: 'json' }
+
+before(async () => {
+  await Nameserver.create(testCase)
+})
+
+after(async () => {
+  // Nameserver.destroy({ id: testCase.id })
+  Nameserver.mysql.disconnect()
+})
+
+describe('nameserver', function () {
+
+  it('gets nameserver by id', async () => {
+    const g = await Nameserver.get({ id: testCase.id })
+    assert.deepEqual(g[0], testCase)
+  })
+
+  it('gets nameserver by name', async () => {
+    const g = await Nameserver.get({ name: testCase.name })
+    assert.deepEqual(g[0], testCase)
+  })
+
+  it('changes a nameserver', async () => {
+    assert.ok(await Nameserver.put({ id: testCase.id, name: 'b.ns.example.com.' }))
+    const ns = await Nameserver.get({ id: testCase.id })
+    assert.deepEqual(ns[0].name, 'b.ns.example.com.')
+    assert.ok(await Nameserver.put({ id: testCase.id, name: testCase.name }))
+  })
+
+  it('deletes a nameserver', async () => {
+    assert.ok(await Nameserver.delete({ id: testCase.id }))
+    let g = await Nameserver.get({ id: testCase.id, deleted: 1 })
+    assert.equal(g[0]?.deleted, true)
+    await Nameserver.delete({ id: testCase.id, deleted: 0 }) // restore
+    g = await Nameserver.get({ id: testCase.id })
+    assert.equal(g[0].deleted, false)
+  })
+})
diff --git a/lib/test/nameserver.json b/lib/test/nameserver.json
new file mode 100644
index 0000000..6888ab9
--- /dev/null
+++ b/lib/test/nameserver.json
@@ -0,0 +1,19 @@
+{
+  "id": 4096,
+  "gid": 4096,
+  "name": "a.ns.example.com.",
+  "description": "",
+  "address": "1.2.3.4",
+  "address6": "2001:DB8::1",
+  "remote_login": "nsd",
+  "logdir": "/foo",
+  "datadir": "/bar",
+  "export": {
+    "interval": 0,
+    "serials": true,
+    "status": "last run:03-05 15:25<br>last cp :09-20 12:59",
+    "type": "NSD"
+  },
+  "ttl": 3600,
+  "deleted": false
+}
diff --git a/package.json b/package.json
index 0d79d33..9c6e38c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@nictool/api",
-  "version": "3.0.0-alpha.3",
+  "version": "3.0.0-alpha.4",
   "description": "NicTool API",
   "main": "index.js",
   "type": "module",