diff --git a/docs/.nojekyll b/docs/.nojekyll
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--- /dev/null
+++ b/docs/.nojekyll
@@ -0,0 +1 @@
+TypeDoc added this file to prevent GitHub Pages from using Jekyll. You can turn off this behavior by setting the `githubPages` option to false.
\ No newline at end of file
diff --git a/docs/README.md b/docs/README.md
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+++ b/docs/README.md
@@ -0,0 +1,9 @@
+# bir1
+
+## Modules
+
+- [\<internal\>](modules/internal_.md)
+
+## Classes
+
+- [Bir](classes/Bir.md)
diff --git a/docs/classes/Bir.md b/docs/classes/Bir.md
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+++ b/docs/classes/Bir.md
@@ -0,0 +1,177 @@
+# Class: Bir
+
+Class Bir provides access to REGON API
+
+**`Example`**
+
+```js
+  import Bir from 'bir1'
+  const bir = new Bir()
+  await bir.login()
+  console.log(await bir.search({ nip: '5261040567' }))
+  // output:
+  // {
+  //   regon: '011417295',
+  //   nip: '5261040567',
+  //   statusNip: '',
+  //   nazwa: 'T-MOBILE POLSKA SPÓŁKA AKCYJNA',
+  //   ...
+  // }
+```
+
+## Constructors
+
+### constructor
+
+• **new Bir**(`options?`): [`Bir`](Bir.md)
+
+Create a new Bir instance
+
+#### Parameters
+
+| Name | Type | Description |
+| :------ | :------ | :------ |
+| `options` | `Object` | - |
+| `options.key?` | `string` | API key provided by GUS. **`Remarks`** If `options.key` is not provided, the internally stored public API key is used to access non-production GUS database. It allows quick start, however non-production database contains old and anonymized data. Providing GUS provided key connects to the production database. |
+| `options.parseOptions?` | [`ParseOptions`](../interfaces/internal_.ParseOptions.md) | Additional parse options for XML parser |
+
+#### Returns
+
+[`Bir`](Bir.md)
+
+#### Defined in
+
+[bir.ts:53](https://github.com/pawel-id/bir1/blob/140054f/src/bir.ts#L53)
+
+## Methods
+
+### login
+
+▸ **login**(): `Promise`\<`void`\>
+
+Login to the API (method: Zaloguj)
+
+#### Returns
+
+`Promise`\<`void`\>
+
+**`Remarks`**
+
+This method must be called before any other method. It is not called
+automatically to allow for more control over the login process.
+
+#### Defined in
+
+[bir.ts:113](https://github.com/pawel-id/bir1/blob/140054f/src/bir.ts#L113)
+
+___
+
+### value
+
+▸ **value**(`value`): `Promise`\<`string`\>
+
+Get diagnostic information (method: GetValue)
+
+#### Parameters
+
+| Name | Type | Description |
+| :------ | :------ | :------ |
+| `value` | [`GetValueOptions`](../modules/internal_.md#getvalueoptions) | value to retrieve |
+
+#### Returns
+
+`Promise`\<`string`\>
+
+#### Defined in
+
+[bir.ts:126](https://github.com/pawel-id/bir1/blob/140054f/src/bir.ts#L126)
+
+___
+
+### search
+
+▸ **search**(`query`): `Promise`\<`any`\>
+
+Search (method: DaneSzukajPodmioty)
+
+#### Parameters
+
+| Name | Type |
+| :------ | :------ |
+| `query` | \{ `nip`: `string`  } \| \{ `regon`: `string`  } \| \{ `krs`: `string`  } |
+
+#### Returns
+
+`Promise`\<`any`\>
+
+**`Remarks`**
+
+Only one of the query parameters can be used at a time.
+
+#### Defined in
+
+[bir.ts:142](https://github.com/pawel-id/bir1/blob/140054f/src/bir.ts#L142)
+
+___
+
+### report
+
+▸ **report**(`query`): `Promise`\<`any`\>
+
+Retrive report (method: DanePobierzPelnyRaport)
+
+#### Parameters
+
+| Name | Type | Description |
+| :------ | :------ | :------ |
+| `query` | `Object` | - |
+| `query.regon` | `string` | REGON number |
+| `query.report` | [`DanePobierzPelnyRaportOptions`](../modules/internal_.md#danepobierzpelnyraportoptions) | report name |
+
+#### Returns
+
+`Promise`\<`any`\>
+
+#### Defined in
+
+[bir.ts:153](https://github.com/pawel-id/bir1/blob/140054f/src/bir.ts#L153)
+
+___
+
+### summary
+
+▸ **summary**(`query`): `Promise`\<`any`\>
+
+Retrive summary report (method: DanePobierzRaportZbiorczy)
+
+#### Parameters
+
+| Name | Type | Description |
+| :------ | :------ | :------ |
+| `query` | `Object` | - |
+| `query.date` | `string` | date in format YYYY-MM-DD not earlier than week before |
+| `query.report` | [`DanePobierzRaportZbiorczyOptions`](../modules/internal_.md#danepobierzraportzbiorczyoptions) | report name |
+
+#### Returns
+
+`Promise`\<`any`\>
+
+#### Defined in
+
+[bir.ts:167](https://github.com/pawel-id/bir1/blob/140054f/src/bir.ts#L167)
+
+___
+
+### logout
+
+▸ **logout**(): `Promise`\<`void`\>
+
+Logout (method: Wyloguj)
+
+#### Returns
+
+`Promise`\<`void`\>
+
+#### Defined in
+
+[bir.ts:179](https://github.com/pawel-id/bir1/blob/140054f/src/bir.ts#L179)
diff --git a/docs/classes/internal_.Xml.md b/docs/classes/internal_.Xml.md
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index 0000000..611e7fc
--- /dev/null
+++ b/docs/classes/internal_.Xml.md
@@ -0,0 +1,43 @@
+# Class: Xml
+
+[\<internal\>](../modules/internal_.md).Xml
+
+## Constructors
+
+### constructor
+
+• **new Xml**(`options?`): [`Xml`](internal_.Xml.md)
+
+#### Parameters
+
+| Name | Type |
+| :------ | :------ |
+| `options` | `Partial`\<[`ParseOptions`](../interfaces/internal_.ParseOptions.md)\> |
+
+#### Returns
+
+[`Xml`](internal_.Xml.md)
+
+#### Defined in
+
+[xml.ts:62](https://github.com/pawel-id/bir1/blob/140054f/src/xml.ts#L62)
+
+## Methods
+
+### parse
+
+▸ **parse**(`xml`): `any`
+
+#### Parameters
+
+| Name | Type |
+| :------ | :------ |
+| `xml` | `string` |
+
+#### Returns
+
+`any`
+
+#### Defined in
+
+[xml.ts:74](https://github.com/pawel-id/bir1/blob/140054f/src/xml.ts#L74)
diff --git a/docs/interfaces/internal_.ParseOptions.md b/docs/interfaces/internal_.ParseOptions.md
new file mode 100644
index 0000000..0ade739
--- /dev/null
+++ b/docs/interfaces/internal_.ParseOptions.md
@@ -0,0 +1,33 @@
+# Interface: ParseOptions
+
+[\<internal\>](../modules/internal_.md).ParseOptions
+
+## Properties
+
+### emptyTag
+
+• `Optional` **emptyTag**: [`EmptyTag`](../modules/internal_.md#emptytag)
+
+When parsing XML the empty tags are replaced by '' - this is the default
+behavior of fast-ml-parser. When this variable is set to any other value,
+the empty tags are futher replaced by that value, overriding default ''.
+
+#### Defined in
+
+[xml.ts:14](https://github.com/pawel-id/bir1/blob/140054f/src/xml.ts#L14)
+
+___
+
+### xmlOptions
+
+• `Optional` **xmlOptions**: `Partial`\<`X2jOptions`\>
+
+Additional parse options for XML parser. Any option of fast-xml-parser
+can be used here. This object is passed to the constructor of
+fast-xml-parser. Then parser is used to parse XML response from GUS.
+
+See [fast-xml-parser](https://github.com/NaturalIntelligence/fast-xml-parser/blob/HEAD/docs/v4/2.XMLparseOptions.md)
+
+#### Defined in
+
+[xml.ts:23](https://github.com/pawel-id/bir1/blob/140054f/src/xml.ts#L23)
diff --git a/docs/modules/internal_.md b/docs/modules/internal_.md
new file mode 100644
index 0000000..15fbad6
--- /dev/null
+++ b/docs/modules/internal_.md
@@ -0,0 +1,55 @@
+# Module: \<internal\>
+
+## Classes
+
+- [Xml](../classes/internal_.Xml.md)
+
+## Interfaces
+
+- [ParseOptions](../interfaces/internal_.ParseOptions.md)
+
+## Type Aliases
+
+### GetValueOptions
+
+Ƭ **GetValueOptions**: ``"StanDanych"`` \| ``"KomunikatKod"`` \| ``"KomunikatTresc"`` \| ``"StatusSesji"`` \| ``"StatusUslugi"`` \| ``"KomunikatUslugi"``
+
+Options for method `GetValue`.
+
+#### Defined in
+
+[types.ts:4](https://github.com/pawel-id/bir1/blob/140054f/src/types.ts#L4)
+
+___
+
+### DanePobierzPelnyRaportOptions
+
+Ƭ **DanePobierzPelnyRaportOptions**: ``"PublDaneRaportFizycznaOsoba"`` \| ``"PublDaneRaportDzialalnoscFizycznejCeidg"`` \| ``"PublDaneRaportDzialalnoscFizycznejRolnicza"`` \| ``"PublDaneRaportDzialalnoscFizycznejPozostala"`` \| ``"PublDaneRaportDzialalnoscFizycznejWKrupgn"`` \| ``"PublDaneRaportDzialalnosciFizycznej"`` \| ``"PublDaneRaportLokalneFizycznej"`` \| ``"PublDaneRaportLokalnaFizycznej"`` \| ``"PublDaneRaportDzialalnosciLokalnejFizycznej"`` \| ``"PublDaneRaportPrawna"`` \| ``"PublDaneRaportDzialalnosciPrawnej"`` \| ``"PublDaneRaportLokalnePrawnej"`` \| ``"PublDaneRaportLokalnaPrawnej"`` \| ``"PublDaneRaportDzialalnosciLokalnejPrawnej"`` \| ``"PublDaneRaportWspolnicyPrawnej"`` \| ``"PublDaneRaportTypJednostki"`` \| ``"BIR11OsFizycznaDaneOgolne"`` \| ``"BIR11OsFizycznaDzialalnoscCeidg"`` \| ``"BIR11OsFizycznaDzialalnoscRolnicza"`` \| ``"BIR11OsFizycznaDzialalnoscPozostala"`` \| ``"BIR11OsFizycznaDzialalnoscSkreslonaDo20141108"`` \| ``"BIR11OsFizycznaPkd"`` \| ``"BIR11OsFizycznaListaJednLokalnych"`` \| ``"BIR11JednLokalnaOsFizycznej"`` \| ``"BIR11JednLokalnaOsFizycznejPkd"`` \| ``"BIR11OsPrawna"`` \| ``"BIR11OsPrawnaPkd"`` \| ``"BIR11OsPrawnaListaJednLokalnych"`` \| ``"BIR11JednLokalnaOsPrawnej"`` \| ``"BIR11JednLokalnaOsPrawnejPkd"`` \| ``"BIR11OsPrawnaSpCywilnaWspolnicy"`` \| ``"BIR11TypPodmiotu"``
+
+Reports for method `DanePobierzPelnyRaport`.
+
+#### Defined in
+
+[types.ts:28](https://github.com/pawel-id/bir1/blob/140054f/src/types.ts#L28)
+
+___
+
+### DanePobierzRaportZbiorczyOptions
+
+Ƭ **DanePobierzRaportZbiorczyOptions**: ``"BIR11NowePodmiotyPrawneOrazDzialalnosciOsFizycznych"`` \| ``"BIR11AktualizowanePodmiotyPrawneOrazDzialalnosciOsFizycznych"`` \| ``"BIR11SkreslonePodmiotyPrawneOrazDzialalnosciOsFizycznych"`` \| ``"BIR11NoweJednostkiLokalne"`` \| ``"BIR11AktualizowaneJednostkiLokalne"`` \| ``"BIR11SkresloneJednostkiLokalne"``
+
+Reports for method `DanePobierzRaportZbiorczy`.
+
+#### Defined in
+
+[types.ts:65](https://github.com/pawel-id/bir1/blob/140054f/src/types.ts#L65)
+
+___
+
+### EmptyTag
+
+Ƭ **EmptyTag**: `string` \| ``null`` \| `undefined`
+
+#### Defined in
+
+[xml.ts:5](https://github.com/pawel-id/bir1/blob/140054f/src/xml.ts#L5)
diff --git a/package.json b/package.json
index e8586b4..24735f9 100644
--- a/package.json
+++ b/package.json
@@ -20,7 +20,7 @@
     "templates"
   ],
   "scripts": {
-    "build": "rimraf dist && tsc",
+    "build": "rimraf docs dist && typedoc && tsc",
     "dev": "tsc -w",
     "test": "tap"
   },
diff --git a/typedoc.json b/typedoc.json
index 9a13263..5a0e303 100644
--- a/typedoc.json
+++ b/typedoc.json
@@ -14,5 +14,5 @@
   "sort": ["source-order"],
   "entryPoints": ["./src/"],
   "readme": "none",
-  "out": "./doc"
+  "out": "./docs"
 }