diff --git a/package.json b/package.json
index 6907d6b..c49069d 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@knocklabs/node",
-  "version": "0.6.4",
+  "version": "0.6.5",
   "description": "Library for interacting with the Knock API",
   "homepage": "https://github.com/knocklabs/knock-node",
   "author": "@knocklabs",
diff --git a/src/common/fetchClient.ts b/src/common/fetchClient.ts
index 51045b7..57dc620 100644
--- a/src/common/fetchClient.ts
+++ b/src/common/fetchClient.ts
@@ -90,17 +90,32 @@ export default class FetchClient {
   private buildUrl(path: string, params?: FetchRequestConfig["params"]): URL {
     const url = new URL(this.config.baseURL + path);
 
-    if (params) {
-      Object.entries(params).forEach(([key, value]) => {
+    function appendParams(key: string, value: any, parentKey?: string) {
+      const fullKey = parentKey ? `${parentKey}[${key}]` : key;
+
+      if (
+        typeof value === "object" &&
+        value !== null &&
+        !(value instanceof Date) &&
+        !(value instanceof Array)
+      ) {
+        // If value is an object, recurse
+        Object.entries(value).forEach(([nestedKey, nestedValue]) => {
+          appendParams(nestedKey, nestedValue, fullKey);
+        });
+      } else if (Array.isArray(value)) {
         // Send array values as individual values instead of a comma separated list
         // e.g. key[]=1&key[]=2&key[]=3 instead of key=1,2,3
-        if (Array.isArray(value)) {
-          for (const val of value) {
-            url.searchParams.append(`${key}[]`, val);
-          }
-        } else {
-          url.searchParams.append(key, value);
-        }
+        value.forEach((val) => url.searchParams.append(`${fullKey}[]`, val));
+      } else {
+        // For primitive values, simply append them
+        url.searchParams.append(fullKey, value);
+      }
+    }
+
+    if (params) {
+      Object.entries(params).forEach(([key, value]) => {
+        appendParams(key, value);
       });
     }
 
diff --git a/src/index.ts b/src/index.ts
index 97a4ecd..ddda1b2 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,6 +1,7 @@
 export * from "./resources/workflows/interfaces";
 export * from "./resources/users/interfaces";
 export * from "./resources/preferences/interfaces";
+export * from "./resources/slack/interfaces";
 export * from "./common/interfaces";
 
 export { Knock } from "./knock";
diff --git a/src/knock.ts b/src/knock.ts
index 22acd66..aab43d8 100644
--- a/src/knock.ts
+++ b/src/knock.ts
@@ -30,6 +30,7 @@ import {
   TokenGrant,
   TokenGrantOptions,
 } from "./common/userTokens";
+import { Slack } from "./resources/slack";
 
 const DEFAULT_HOSTNAME = "https://api.knock.app";
 
@@ -44,6 +45,7 @@ class Knock {
   readonly objects = new Objects(this);
   readonly messages = new Messages(this);
   readonly tenants = new Tenants(this);
+  readonly slack = new Slack(this);
 
   constructor(readonly key?: string, readonly options: KnockOptions = {}) {
     if (!key) {
diff --git a/src/resources/slack/index.ts b/src/resources/slack/index.ts
new file mode 100644
index 0000000..c484afc
--- /dev/null
+++ b/src/resources/slack/index.ts
@@ -0,0 +1,85 @@
+import { Knock } from "../../knock";
+import {
+  AuthCheckInput,
+  GetSlackChannelsInput,
+  PaginatedSlackChannelResponse,
+  RevokeAccessTokenInput,
+} from "./interfaces";
+
+const TENANT_COLLECTION = "$tenants";
+
+function removeNullKeys<T extends object>(obj: T): Partial<T> {
+  Object.keys(obj).forEach((key) => {
+    if (obj[key as keyof T] === null) {
+      delete obj[key as keyof T];
+    }
+  });
+  return obj;
+}
+
+export class Slack {
+  constructor(readonly knock: Knock) {}
+
+  async getChannels(
+    input: GetSlackChannelsInput,
+  ): Promise<PaginatedSlackChannelResponse> {
+    const { knockChannelId, tenant } = input;
+    const queryOptions = input.queryOptions || {};
+
+    const params = {
+      access_token_object: {
+        object_id: tenant,
+        collection: TENANT_COLLECTION,
+      },
+      channel_id: knockChannelId,
+      query_options: removeNullKeys({
+        cursor: queryOptions.cursor || null,
+        limit: queryOptions.limit || null,
+        exclude_archived: queryOptions.excludeArchived || null,
+        team_id: queryOptions.teamId || null,
+        types: queryOptions.types || null,
+      }),
+    };
+
+    const { data } = await this.knock.get(
+      `/v1/providers/slack/${knockChannelId}/channels`,
+      params,
+    );
+
+    return data;
+  }
+
+  async authCheck({ tenant, knockChannelId }: AuthCheckInput) {
+    const params = {
+      access_token_object: {
+        object_id: tenant,
+        collection: TENANT_COLLECTION,
+      },
+      channel_id: knockChannelId,
+    };
+
+    const { data } = await this.knock.get(
+      `/v1/providers/slack/${knockChannelId}/auth_check`,
+      params,
+    );
+
+    return data;
+  }
+
+  async revokeAccessToken({ tenant, knockChannelId }: RevokeAccessTokenInput) {
+    const params = {
+      access_token_object: {
+        object_id: tenant,
+        collection: TENANT_COLLECTION,
+      },
+      channel_id: knockChannelId,
+    };
+
+    const { data } = await this.knock.get(
+      `/v1/providers/slack/${knockChannelId}/revoke_access`,
+      params,
+    );
+
+    return data;
+  }
+}
diff --git a/src/resources/slack/interfaces.ts b/src/resources/slack/interfaces.ts
new file mode 100644
index 0000000..1077def
--- /dev/null
+++ b/src/resources/slack/interfaces.ts
@@ -0,0 +1,34 @@
+export type GetSlackChannelsInput = {
+  tenant: string;
+  knockChannelId: string;
+  queryOptions?: {
+    limit?: number;
+    cursor?: string;
+    excludeArchived?: boolean;
+    teamId?: string;
+    types?: string;
+  };
+};
+
+export type SlackChannel = {
+  name: string;
+  id: string;
+  is_private: boolean;
+  is_im: boolean;
+  context_team_id: boolean;
+};
+
+export type PaginatedSlackChannelResponse = {
+  slack_channels: SlackChannel[];
+  next_cursor: string;
+};
+
+export type AuthCheckInput = {
+  tenant: string;
+  knockChannelId: string;
+};
+
+export type RevokeAccessTokenInput = {
+  tenant: string;
+  knockChannelId: string;
+};