diff --git a/.changeset/four-jars-laugh.md b/.changeset/four-jars-laugh.md
new file mode 100644
index 00000000..2348f91c
--- /dev/null
+++ b/.changeset/four-jars-laugh.md
@@ -0,0 +1,5 @@
+---
+"@xmtp/frames-client": patch
+---
+
+Adds ability to post frame to a destination and see an updated response
diff --git a/packages/frames-client/README.md b/packages/frames-client/README.md
index cdc25b1a..361522b5 100644
--- a/packages/frames-client/README.md
+++ b/packages/frames-client/README.md
@@ -1 +1,17 @@
 # frames-client
+
+## Usage
+
+```ts
+const xmtpClient = await Client.create(wallet);
+const framesClient = new FramesClient(xmtpClient);
+
+const frameUrl = "https://www.myframe.xyz";
+
+// Read data from a frame
+const frameMetadata = await readMetadata(frameUrl);
+
+// Handle a click to button 2 from a conversation with topic "/xmtp/0/123" on messageId "45678"
+const payload = await signFrameAction(frameUrl, 2, "/xmtp/0/123", "45678");
+const updatedFrameMetadata = await postToFrame(frameUrl, payload);
+```
diff --git a/packages/frames-client/package.json b/packages/frames-client/package.json
index 04e33827..a0161c7c 100644
--- a/packages/frames-client/package.json
+++ b/packages/frames-client/package.json
@@ -60,8 +60,10 @@
     "@rollup/plugin-terser": "^0.4.4",
     "@rollup/plugin-typescript": "^11.1.6",
     "@xmtp/tsconfig": "workspace:*",
+    "@xmtp/xmtp-js": "^11.3.7",
     "eslint": "^8.56.0",
     "eslint-config-xmtp-web": "workspace:*",
+    "ethers": "^6.10.0",
     "prettier": "^3.2.4",
     "rollup": "^4.9.6",
     "rollup-plugin-dts": "^6.1.0",
diff --git a/packages/frames-client/src/converters.test.ts b/packages/frames-client/src/converters.test.ts
new file mode 100644
index 00000000..ce939eb6
--- /dev/null
+++ b/packages/frames-client/src/converters.test.ts
@@ -0,0 +1,17 @@
+import { Wallet } from "ethers";
+import { it, expect, describe } from "vitest";
+import { PrivateKeyBundleV1, SignedPublicKeyBundle } from "@xmtp/xmtp-js";
+import { v1ToV2Bundle } from "./converters";
+
+describe("converters", () => {
+  it("can convert a valid public key bundle", async () => {
+    const v1Bundle = await PrivateKeyBundleV1.generate(Wallet.createRandom());
+    const publicKeyBundle = v1Bundle.getPublicKeyBundle();
+
+    const v2Bundle = v1ToV2Bundle(publicKeyBundle);
+    const v2BundleInstance = new SignedPublicKeyBundle(v2Bundle);
+    const downgradedBundle = v2BundleInstance.toLegacyBundle();
+
+    expect(downgradedBundle.equals(publicKeyBundle)).toBe(true);
+  });
+});
diff --git a/packages/frames-client/src/crypto.ts b/packages/frames-client/src/crypto.ts
index b45c2f8f..6505e0b3 100644
--- a/packages/frames-client/src/crypto.ts
+++ b/packages/frames-client/src/crypto.ts
@@ -1,4 +1,9 @@
+// eslint-disable-next-line
+const webCrypto: Crypto =
+  // eslint-disable-next-line
+  typeof crypto === "undefined" ? require("crypto").webcrypto : crypto;
+
 export async function sha256(data: Uint8Array): Promise<Uint8Array> {
-  const digest = await crypto.subtle.digest("SHA-256", data);
+  const digest = await webCrypto.subtle.digest("SHA-256", data);
   return new Uint8Array(digest);
 }
diff --git a/packages/frames-client/src/index.test.ts b/packages/frames-client/src/index.test.ts
new file mode 100644
index 00000000..9f0b9fa2
--- /dev/null
+++ b/packages/frames-client/src/index.test.ts
@@ -0,0 +1,82 @@
+import { Client, Signature, SignedPublicKey } from "@xmtp/xmtp-js";
+import { Wallet } from "ethers";
+import { frames, fetcher } from "@xmtp/proto";
+import { it, expect, describe, beforeEach } from "vitest";
+import { FramesClient } from ".";
+import { sha256 } from "./crypto";
+
+const { b64Decode } = fetcher;
+
+describe("signFrameAction", () => {
+  let client: Client;
+  let framesClient: FramesClient;
+  beforeEach(async () => {
+    client = await Client.create(Wallet.createRandom());
+    framesClient = new FramesClient(client);
+  });
+  it("should sign a frame action with a valid signature", async () => {
+    const frameUrl = "https://example.com";
+    const buttonIndex = 1;
+    const conversationIdentifier = "testConversationIdentifier";
+    const messageId = "testMessageId";
+
+    const signedPayload = await framesClient.signFrameAction(
+      frameUrl,
+      buttonIndex,
+      conversationIdentifier,
+      messageId,
+    );
+
+    expect(signedPayload.untrustedData.walletAddress).toEqual(client.address);
+    expect(signedPayload.untrustedData.url).toEqual(frameUrl);
+    expect(signedPayload.untrustedData.buttonIndex).toEqual(buttonIndex);
+    expect(signedPayload.untrustedData.conversationIdentifier).toEqual(
+      conversationIdentifier,
+    );
+    expect(signedPayload.untrustedData.timestamp).toBeGreaterThan(0);
+
+    const signedPayloadProto = frames.FrameAction.decode(
+      b64Decode(signedPayload.trustedData.messageBytes),
+    );
+    expect(signedPayloadProto.actionBody).toBeDefined();
+    expect(signedPayloadProto.signature).toBeDefined();
+    expect(signedPayloadProto.signedPublicKeyBundle).toBeDefined();
+
+    const signedPayloadBody = frames.FrameActionBody.decode(
+      signedPayloadProto.actionBody,
+    );
+    expect(signedPayloadBody.messageId).toEqual(messageId);
+    expect(new TextDecoder().decode(signedPayloadBody.buttonIndex)).toEqual(
+      buttonIndex.toString(),
+    );
+    expect(new TextDecoder().decode(signedPayloadBody.frameUrl)).toEqual(
+      frameUrl,
+    );
+    expect(signedPayloadBody.conversationIdentifier).toEqual(
+      conversationIdentifier,
+    );
+    expect(new TextDecoder().decode(signedPayloadBody.frameUrl)).toEqual(
+      frameUrl,
+    );
+
+    if (
+      !signedPayloadProto.signature ||
+      !signedPayloadProto?.signedPublicKeyBundle?.identityKey
+    ) {
+      throw new Error("Missing signature");
+    }
+
+    const signatureInstance = new Signature(signedPayloadProto.signature);
+    const digest = await sha256(signedPayloadProto.actionBody);
+    // Ensure the signature is valid
+    expect(
+      signatureInstance
+        .getPublicKey(digest)
+        ?.equals(
+          new SignedPublicKey(
+            signedPayloadProto.signedPublicKeyBundle.identityKey,
+          ).toLegacyKey(),
+        ),
+    );
+  });
+});
diff --git a/packages/frames-client/src/index.ts b/packages/frames-client/src/index.ts
index 22b78c89..d47c9810 100644
--- a/packages/frames-client/src/index.ts
+++ b/packages/frames-client/src/index.ts
@@ -21,6 +21,30 @@ export class FramesClient {
     return (await response.json()) as FramesApiResponse;
   }
 
+  static async postToFrame(
+    url: string,
+    payload: FramePostPayload,
+  ): Promise<FramesApiResponse> {
+    const response = await fetch(
+      `${OG_PROXY_URL}?url=${encodeURIComponent(url)}`,
+      {
+        method: "POST",
+        body: JSON.stringify(payload),
+        headers: {
+          "Content-Type": "application/json",
+        },
+      },
+    );
+
+    if (!response.ok) {
+      throw new Error(
+        `Failed to post to frame: ${response.status} ${response.statusText}`,
+      );
+    }
+
+    return (await response.json()) as FramesApiResponse;
+  }
+
   async signFrameAction(
     frameUrl: string,
     buttonIndex: number,
diff --git a/yarn.lock b/yarn.lock
index 1a1ca439..aafc306d 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3297,6 +3297,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@types/node@npm:18.15.13":
+  version: 18.15.13
+  resolution: "@types/node@npm:18.15.13"
+  checksum: b9bbe923573797ef7c5fd2641a6793489e25d9369c32aeadcaa5c7c175c85b42eb12d6fe173f6781ab6f42eaa1ebd9576a419eeaa2a1ec810094adb8adaa9a54
+  languageName: node
+  linkType: hard
+
 "@types/node@npm:^12.12.54, @types/node@npm:^12.7.1":
   version: 12.20.55
   resolution: "@types/node@npm:12.20.55"
@@ -4306,8 +4313,10 @@ __metadata:
     "@rollup/plugin-typescript": "npm:^11.1.6"
     "@xmtp/proto": "npm:3.41.0-beta.2"
     "@xmtp/tsconfig": "workspace:*"
+    "@xmtp/xmtp-js": "npm:^11.3.7"
     eslint: "npm:^8.56.0"
     eslint-config-xmtp-web: "workspace:*"
+    ethers: "npm:^6.10.0"
     prettier: "npm:^3.2.4"
     rollup: "npm:^4.9.6"
     rollup-plugin-dts: "npm:^6.1.0"
@@ -4579,6 +4588,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"aes-js@npm:4.0.0-beta.5":
+  version: 4.0.0-beta.5
+  resolution: "aes-js@npm:4.0.0-beta.5"
+  checksum: 8f745da2e8fb38e91297a8ec13c2febe3219f8383303cd4ed4660ca67190242ccfd5fdc2f0d1642fd1ea934818fb871cd4cc28d3f28e812e3dc6c3d0f1f97c24
+  languageName: node
+  linkType: hard
+
 "aes-js@npm:^3.1.2":
   version: 3.1.2
   resolution: "aes-js@npm:3.1.2"
@@ -7198,6 +7214,21 @@ __metadata:
   languageName: node
   linkType: hard
 
+"ethers@npm:^6.10.0":
+  version: 6.10.0
+  resolution: "ethers@npm:6.10.0"
+  dependencies:
+    "@adraffy/ens-normalize": "npm:1.10.0"
+    "@noble/curves": "npm:1.2.0"
+    "@noble/hashes": "npm:1.3.2"
+    "@types/node": "npm:18.15.13"
+    aes-js: "npm:4.0.0-beta.5"
+    tslib: "npm:2.4.0"
+    ws: "npm:8.5.0"
+  checksum: 04fdd3f76ea93a8b45b2fe4d9c8e2bd0d688823faba672897dd19cc3303c202a166902fe6058004562f13aaecf9f77a9f70ff113f995e94107efef2457b016dd
+  languageName: node
+  linkType: hard
+
 "eventemitter3@npm:^4.0.7":
   version: 4.0.7
   resolution: "eventemitter3@npm:4.0.7"
@@ -12833,6 +12864,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"tslib@npm:2.4.0":
+  version: 2.4.0
+  resolution: "tslib@npm:2.4.0"
+  checksum: d8379e68b36caf082c1905ec25d17df8261e1d68ddc1abfd6c91158a064f6e4402039ae7c02cf4c81d12e3a2a2c7cd8ea2f57b233eb80136a2e3e7279daf2911
+  languageName: node
+  linkType: hard
+
 "tslib@npm:^2.0.0, tslib@npm:^2.1.0, tslib@npm:^2.3.1, tslib@npm:^2.4.0":
   version: 2.5.0
   resolution: "tslib@npm:2.5.0"
@@ -13970,6 +14008,21 @@ __metadata:
   languageName: node
   linkType: hard
 
+"ws@npm:8.5.0":
+  version: 8.5.0
+  resolution: "ws@npm:8.5.0"
+  peerDependencies:
+    bufferutil: ^4.0.1
+    utf-8-validate: ^5.0.2
+  peerDependenciesMeta:
+    bufferutil:
+      optional: true
+    utf-8-validate:
+      optional: true
+  checksum: f0ee700970a0bf925b1ec213ca3691e84fb8b435a91461fe3caf52f58c6cec57c99ed5890fbf6978824c932641932019aafc55d864cad38ac32577496efd5d3a
+  languageName: node
+  linkType: hard
+
 "ws@npm:^7.4.5, ws@npm:^7.5.1":
   version: 7.5.9
   resolution: "ws@npm:7.5.9"