diff --git a/.gitignore b/.gitignore
index df67443..bce809d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,6 +7,8 @@ yarn-error.log*
 .pnpm-debug.log*
 
 node_modules/
+# OS
+.DS_Store
 
 # Runtime data
 pids
@@ -32,4 +34,4 @@ e2e-results/
 # Editor
 .idea
 
-.eslintcache
\ No newline at end of file
+.eslintcache
diff --git a/src/datasources/tag/README.md b/src/datasources/tag/README.md
new file mode 100644
index 0000000..a552bc1
--- /dev/null
+++ b/src/datasources/tag/README.md
@@ -0,0 +1,4 @@
+# SystemLink Tag data source
+
+This is a plugin for the Tag Service. It allows you to: 
+- Populate a Stat, Gauge, table, or other panel with the current value, min, max, average values, of a tag. The tag datatype may be numeric or string.
diff --git a/src/datasources/tag/TagDataSource.ts b/src/datasources/tag/TagDataSource.ts
new file mode 100644
index 0000000..ac2d005
--- /dev/null
+++ b/src/datasources/tag/TagDataSource.ts
@@ -0,0 +1,46 @@
+import {
+  DataQueryRequest,
+  DataQueryResponse,
+  DataSourceApi,
+  DataSourceInstanceSettings,
+  MutableDataFrame,
+  FieldType,
+} from '@grafana/data';
+
+import { TestingStatus, getBackendSrv } from '@grafana/runtime';
+
+import { TagQuery } from './types';
+
+export class TagDataSource extends DataSourceApi<TagQuery> {
+  baseUrl: string;
+  constructor(private instanceSettings: DataSourceInstanceSettings) {
+    super(instanceSettings);
+    // TODO: set base path of the service
+    this.baseUrl = this.instanceSettings.url + '/nifoo/v2';
+  }
+
+  async query(options: DataQueryRequest<TagQuery>): Promise<DataQueryResponse> {
+    const { range } = options;
+    const from = range!.from.valueOf();
+    const to = range!.to.valueOf();
+
+    // Return a constant for each query.
+    const data = options.targets.map((target) => {
+      return new MutableDataFrame({
+        refId: target.refId,
+        fields: [
+          { name: 'Time', values: [from, to], type: FieldType.time },
+          { name: 'Value', values: [target.constant, target.constant], type: FieldType.number },
+        ],
+      });
+    });
+
+    return { data };
+  }
+
+  async testDatasource(): Promise<TestingStatus> {
+    // TODO: Implement a health and authentication check
+    await getBackendSrv().get(this.baseUrl + '/bar');
+    return { status: 'success', message: 'Data source connected and authentication successful!' };
+  }
+}
diff --git a/src/datasources/tag/components/TagQueryEditor.tsx b/src/datasources/tag/components/TagQueryEditor.tsx
new file mode 100644
index 0000000..a32aeab
--- /dev/null
+++ b/src/datasources/tag/components/TagQueryEditor.tsx
@@ -0,0 +1,32 @@
+import React, { ChangeEvent } from 'react';
+import { InlineField, Input } from '@grafana/ui';
+import { QueryEditorProps } from '@grafana/data';
+import { TagDataSource } from '../TagDataSource';
+import { TagQuery } from '../types';
+
+type Props = QueryEditorProps<TagDataSource, TagQuery>;
+
+export function TagQueryEditor({ query, onChange, onRunQuery }: Props) {
+  const onQueryTextChange = (event: ChangeEvent<HTMLInputElement>) => {
+    onChange({ ...query, queryText: event.target.value });
+  };
+
+  const onConstantChange = (event: ChangeEvent<HTMLInputElement>) => {
+    onChange({ ...query, constant: parseFloat(event.target.value) });
+    // executes the query
+    onRunQuery();
+  };
+
+  const { queryText, constant } = query;
+
+  return (
+    <div className="gf-form">
+      <InlineField label="Constant">
+        <Input onChange={onConstantChange} value={constant} width={8} type="number" step="0.1" />
+      </InlineField>
+      <InlineField label="Query Text" labelWidth={16} tooltip="Not used yet">
+        <Input onChange={onQueryTextChange} value={queryText || ''} />
+      </InlineField>
+    </div>
+  );
+}
diff --git a/src/datasources/tag/img/logo-ni.svg b/src/datasources/tag/img/logo-ni.svg
new file mode 100644
index 0000000..76f8758
--- /dev/null
+++ b/src/datasources/tag/img/logo-ni.svg
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg width="43px" height="29px" viewBox="0 0 43 29" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+    <title>9B441361-9BF9-4E57-A772-8A5F7846467E</title>
+    <g id="Login" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
+        <g id="Logging-In-Loader" transform="translate(-864.000000, -139.000000)" fill="#00B383">
+            <g id="NI-logo" transform="translate(864.000000, 139.000000)">
+                <path d="M9.98214286,9.92105263 L9.98214286,29 L0,29 L0,9.92105263 L9.98214286,9.92105263 Z M43,0 L43,29 C37.4870147,29 33.0178571,24.5308424 33.0178571,19.0178571 L33.0178571,0 L43,0 Z M18.4107143,0 C23.9335618,-1.01453063e-15 28.4107143,4.4771525 28.4107143,10 L28.4107143,29 L18.4293773,29 L18.4293773,10.9210526 C18.4293439,10.3687809 17.981649,9.92107107 17.4293773,9.92101925 L9.98214286,9.92077061 L9.98214286,0 L18.4107143,0 Z"></path>
+            </g>
+        </g>
+    </g>
+</svg>
\ No newline at end of file
diff --git a/src/datasources/tag/module.ts b/src/datasources/tag/module.ts
new file mode 100644
index 0000000..f59b1e7
--- /dev/null
+++ b/src/datasources/tag/module.ts
@@ -0,0 +1,8 @@
+import { DataSourcePlugin } from '@grafana/data';
+import { TagDataSource } from './TagDataSource';
+import { TagQueryEditor } from './components/TagQueryEditor';
+import { HttpConfigEditor } from 'core/HttpConfigEditor';
+
+export const plugin = new DataSourcePlugin(TagDataSource)
+  .setConfigEditor(HttpConfigEditor)
+  .setQueryEditor(TagQueryEditor);
diff --git a/src/datasources/tag/plugin.json b/src/datasources/tag/plugin.json
new file mode 100644
index 0000000..dd199d8
--- /dev/null
+++ b/src/datasources/tag/plugin.json
@@ -0,0 +1,15 @@
+{
+  "type": "datasource",
+  "name": "SystemLink Tags",
+  "id": "ni-sltag-datasource",
+  "metrics": true,
+  "info": {
+    "author": {
+      "name": "NI"
+    },
+    "logos": {
+      "small": "img/logo-ni.svg",
+      "large": "img/logo-ni.svg"
+    }
+  }
+}
diff --git a/src/datasources/tag/types.ts b/src/datasources/tag/types.ts
new file mode 100644
index 0000000..e23c2c5
--- /dev/null
+++ b/src/datasources/tag/types.ts
@@ -0,0 +1,6 @@
+import { DataQuery } from '@grafana/schema'
+
+export interface TagQuery extends DataQuery {
+  queryText?: string;
+  constant: number;
+}