diff --git a/examples/testapp/src/components/RpcMethods/method/signMessageMethods.ts b/examples/testapp/src/components/RpcMethods/method/signMessageMethods.ts
index 45399add..0f983422 100644
--- a/examples/testapp/src/components/RpcMethods/method/signMessageMethods.ts
+++ b/examples/testapp/src/components/RpcMethods/method/signMessageMethods.ts
@@ -77,12 +77,22 @@ const ethSignTypedDataV4: RpcRequestInput = {
 	],
 }
 
+const walletSignRawDigest: RpcRequestInput = {
+	method: 'wallet_signRawDigest',
+	params: [
+		{ key: 'digest', required: true },
+		{ key: 'address', required: true },
+	],
+	format: (data: Record<string, string>) => [data.digest, data.address],
+}
+
 export const signMessageMethods = [
 	ethSign,
 	personalSign,
 	ethSignTypedDataV1,
 	ethSignTypedDataV3,
 	ethSignTypedDataV4,
+	walletSignRawDigest,
 ]
 
 export const verifySignMsg = async ({
diff --git a/examples/testapp/src/components/RpcMethods/shortcut/signMessageShortcuts.ts b/examples/testapp/src/components/RpcMethods/shortcut/signMessageShortcuts.ts
index 5c40d2d1..ee6c812f 100644
--- a/examples/testapp/src/components/RpcMethods/shortcut/signMessageShortcuts.ts
+++ b/examples/testapp/src/components/RpcMethods/shortcut/signMessageShortcuts.ts
@@ -11,6 +11,16 @@ const personalSignShortcuts: ShortcutType[] = [
 	},
 ]
 
+const walletSignRawDigestShortcuts: ShortcutType[] = [
+	{
+		key: 'Example digest',
+		data: {
+			digest: `0x${'ab'.repeat(32)}`,
+			address: ADDR_TO_FILL,
+		},
+	},
+]
+
 const ethSignTypedDataV1Shortcuts: ShortcutType[] = [
 	{
 		key: EXAMPLE_MESSAGE,
@@ -180,4 +190,5 @@ export const signMessageShortcutsMap = (chainId: number) => ({
 	eth_signTypedData_v1: ethSignTypedDataV1Shortcuts,
 	eth_signTypedData_v3: ethSignTypedDataV3Shortcuts(chainId),
 	eth_signTypedData_v4: ethSignTypedDataV4Shortcuts(chainId),
+	wallet_signRawDigest: walletSignRawDigestShortcuts,
 })
diff --git a/packages/app-sdk/package.json b/packages/app-sdk/package.json
index 76469267..f666d705 100644
--- a/packages/app-sdk/package.json
+++ b/packages/app-sdk/package.json
@@ -32,6 +32,11 @@
 			"import": "./dist/interface/public-utilities/spend-permission/index.js",
 			"require": "./dist/interface/public-utilities/spend-permission/index.js"
 		},
+		"./raw-digest-sign": {
+			"types": "./dist/interface/public-utilities/raw-digest-sign/index.d.ts",
+			"import": "./dist/interface/public-utilities/raw-digest-sign/index.js",
+			"require": "./dist/interface/public-utilities/raw-digest-sign/index.js"
+		},
 		"./ui-assets": {
 			"types": "./dist/ui/assets/index.d.ts",
 			"import": "./dist/ui/assets/index.js",
@@ -117,4 +122,4 @@
 			"import": "*"
 		}
 	]
-}
+}
\ No newline at end of file
diff --git a/packages/app-sdk/src/browser-entry.ts b/packages/app-sdk/src/browser-entry.ts
index 685d787a..f000555a 100644
--- a/packages/app-sdk/src/browser-entry.ts
+++ b/packages/app-sdk/src/browser-entry.ts
@@ -31,6 +31,8 @@ export type {
 } from ':core/provider/interface.js'
 export { createStartaleAccountSDK } from './interface/builder/core/createStartaleAccountSDK.js'
 export { getCryptoKeyAccount, removeCryptoKey } from './kms/crypto-key/index.js'
+export { requestSignRawDigest } from './interface/public-utilities/raw-digest-sign/index.js'
+export type { RequestSignRawDigestType } from './interface/public-utilities/raw-digest-sign/index.js'
 export { base, CHAIN_IDS, getPaymentStatus, pay, TOKENS }
 export type {
 	InfoRequest,
diff --git a/packages/app-sdk/src/index.ts b/packages/app-sdk/src/index.ts
index 97f63987..a443f5cb 100644
--- a/packages/app-sdk/src/index.ts
+++ b/packages/app-sdk/src/index.ts
@@ -12,6 +12,10 @@ export { createStartaleAccountSDK } from './interface/builder/core/createStartal
 
 export { getCryptoKeyAccount, removeCryptoKey } from './kms/crypto-key/index.js'
 
+// Raw digest sign interface exports
+export { requestSignRawDigest } from './interface/public-utilities/raw-digest-sign/index.js'
+export type { RequestSignRawDigestType } from './interface/public-utilities/raw-digest-sign/index.js'
+
 // Payment interface exports
 export { base, getPaymentStatus, pay } from './interface/payment/index.js'
 export type {
diff --git a/packages/app-sdk/src/interface/public-utilities/raw-digest-sign/index.test.ts b/packages/app-sdk/src/interface/public-utilities/raw-digest-sign/index.test.ts
new file mode 100644
index 00000000..93e3c073
--- /dev/null
+++ b/packages/app-sdk/src/interface/public-utilities/raw-digest-sign/index.test.ts
@@ -0,0 +1,55 @@
+import { describe, expect, it, vi } from 'vitest'
+
+import { ProviderInterface } from ':core/provider/interface.js'
+import { requestSignRawDigest } from './index.js'
+
+describe('requestSignRawDigest', () => {
+	const address = '0x1234567890abcdef1234567890abcdef12345678' as const
+	const digest = `0x${'ab'.repeat(32)}` as const
+
+	const makeProvider = (returnValue: string): ProviderInterface =>
+		({
+			request: vi.fn().mockResolvedValue(returnValue),
+		}) as unknown as ProviderInterface
+
+	it('forwards a 32-byte digest to wallet_signRawDigest', async () => {
+		const provider = makeProvider('0xdeadbeef')
+
+		const signature = await requestSignRawDigest({
+			provider,
+			digest,
+			address,
+		})
+
+		expect(provider.request).toHaveBeenCalledWith({
+			method: 'wallet_signRawDigest',
+			params: [digest, address],
+		})
+		expect(signature).toBe('0xdeadbeef')
+	})
+
+	it('rejects digests that are not exactly 32 bytes', async () => {
+		const provider = makeProvider('0xdeadbeef')
+
+		await expect(
+			requestSignRawDigest({
+				provider,
+				digest: '0x1234' as `0x${string}`,
+				address,
+			}),
+		).rejects.toThrow('digest must be a 32-byte hex string')
+		expect(provider.request).not.toHaveBeenCalled()
+	})
+
+	it('rejects non-hex digests of the right length', async () => {
+		const provider = makeProvider('0xdeadbeef')
+
+		await expect(
+			requestSignRawDigest({
+				provider,
+				digest: `0x${'zz'.repeat(32)}` as `0x${string}`,
+				address,
+			}),
+		).rejects.toThrow('digest must be a 32-byte hex string')
+	})
+})
diff --git a/packages/app-sdk/src/interface/public-utilities/raw-digest-sign/index.ts b/packages/app-sdk/src/interface/public-utilities/raw-digest-sign/index.ts
new file mode 100644
index 00000000..99f49996
--- /dev/null
+++ b/packages/app-sdk/src/interface/public-utilities/raw-digest-sign/index.ts
@@ -0,0 +1,46 @@
+import { type Address, type Hex } from 'viem'
+
+import { ProviderInterface } from ':core/provider/interface.js'
+
+export type RequestSignRawDigestType = {
+	provider: ProviderInterface
+	/** 32-byte signing digest (0x + 64 hex chars) */
+	digest: Hex
+	address: Address
+}
+
+const DIGEST_PATTERN = /^0x[0-9a-fA-F]{64}$/
+
+/**
+ * Asks the popup to raw-sign a 32-byte digest with the user's embedded
+ * wallet (EOA) — plain secp256k1 ECDSA over the exact digest bytes, with no
+ * EIP-191 prefix and no re-hashing.
+ *
+ * The signature bytes vary across calls (MPC signing is non-deterministic),
+ * but `ecrecover(digest, signature)` always yields the same signer address.
+ * Callers should rely on the recovered key, never on signature stability.
+ *
+ * Typical use cases: recovering a stable user address via ecrecover, and
+ * signing externally-computed digests such as Substrate extrinsic payloads
+ * for ethereum-type (AccountId20) chains.
+ */
+const requestSignRawDigestFn = async ({
+	provider,
+	digest,
+	address,
+}: RequestSignRawDigestType): Promise<Hex> => {
+	if (!DIGEST_PATTERN.test(digest)) {
+		throw new Error(
+			'digest must be a 32-byte hex string (0x followed by 64 hex chars)',
+		)
+	}
+
+	const signature = (await provider.request({
+		method: 'wallet_signRawDigest',
+		params: [digest, address],
+	})) as Hex
+
+	return signature
+}
+
+export const requestSignRawDigest = requestSignRawDigestFn
diff --git a/packages/app-sdk/src/sign/app-sdk/Signer.test.ts b/packages/app-sdk/src/sign/app-sdk/Signer.test.ts
index c09f057e..0c8c1175 100644
--- a/packages/app-sdk/src/sign/app-sdk/Signer.test.ts
+++ b/packages/app-sdk/src/sign/app-sdk/Signer.test.ts
@@ -449,6 +449,7 @@ describe('Signer', () => {
 			'eth_ecRecover',
 			'personal_sign',
 			'wallet_sign',
+			'wallet_signRawDigest',
 			'personal_ecRecover',
 			'eth_signTransaction',
 			'eth_sendTransaction',
diff --git a/packages/app-sdk/src/sign/app-sdk/Signer.ts b/packages/app-sdk/src/sign/app-sdk/Signer.ts
index 00728fe9..794360ee 100644
--- a/packages/app-sdk/src/sign/app-sdk/Signer.ts
+++ b/packages/app-sdk/src/sign/app-sdk/Signer.ts
@@ -269,6 +269,7 @@ export class Signer {
 			case 'eth_ecRecover':
 			case 'personal_sign':
 			case 'wallet_sign':
+			case 'wallet_signRawDigest':
 			case 'personal_ecRecover':
 			case 'eth_signTransaction':
 			case 'eth_sendTransaction':
diff --git a/packages/app-sdk/src/sign/app-sdk/utils.test.ts b/packages/app-sdk/src/sign/app-sdk/utils.test.ts
index f7eccde3..4882e4d1 100644
--- a/packages/app-sdk/src/sign/app-sdk/utils.test.ts
+++ b/packages/app-sdk/src/sign/app-sdk/utils.test.ts
@@ -34,6 +34,7 @@ describe('utils', () => {
 			['wallet_sendCalls', [{ from: sender }], sender],
 			['eth_signTypedData_v4', [sender, {}], sender],
 			['personal_sign', ['message', sender], sender],
+			['wallet_signRawDigest', ['message', sender], sender],
 		])(
 			'should return the sender from the request for %s',
 			(method, params, sender) => {
@@ -50,6 +51,7 @@ describe('utils', () => {
 			['wallet_sendCalls', [{}], [{ from: '0x123' }]],
 			['eth_signTypedData_v4', [undefined, {}], ['0x123', {}]],
 			['personal_sign', ['hello', undefined], ['hello', '0x123']],
+			['wallet_signRawDigest', ['hello', undefined], ['hello', '0x123']],
 		])(
 			'should enhance the request params for %s',
 			(method, params, expectedParams) => {
diff --git a/packages/app-sdk/src/sign/app-sdk/utils.ts b/packages/app-sdk/src/sign/app-sdk/utils.ts
index 3b8716f6..7924603a 100644
--- a/packages/app-sdk/src/sign/app-sdk/utils.ts
+++ b/packages/app-sdk/src/sign/app-sdk/utils.ts
@@ -40,6 +40,7 @@ export function getSenderFromRequest(request: RequestArguments) {
 	}
 	switch (request.method) {
 		case 'personal_sign':
+		case 'wallet_signRawDigest':
 			return request.params[1] as Address
 		case 'eth_signTypedData_v4':
 			return request.params[0] as Address
@@ -67,6 +68,7 @@ export function addSenderToRequest(request: RequestArguments, sender: Address) {
 			params[0] = sender
 			break
 		case 'personal_sign':
+		case 'wallet_signRawDigest':
 			params[1] = sender
 			break
 		default: