diff --git a/apps/docs/src/components/test-zkapp.tsx b/apps/docs/src/components/test-zkapp.tsx
index fb24a28..d8bedaf 100644
--- a/apps/docs/src/components/test-zkapp.tsx
+++ b/apps/docs/src/components/test-zkapp.tsx
@@ -5,6 +5,36 @@ import { useState, useSyncExternalStore } from "react";
 
 const store = createStore();
 
+const sampleCredential = {
+	version: "v0",
+	witness: {
+		type: "simple",
+		issuer: {
+			_type: "PublicKey",
+			value: "B62qqMxueXzenrchT5CKC5eCSmfcbHic9wJd9GEdHVcd9uCWrjPJjHS",
+		},
+		issuerSignature: {
+			_type: "Signature",
+			value: {
+				r: "27355434072539307953235904941558417174103383443074165997458891331674091021280",
+				s: "22156398191479529717864137276005168653180340733374387165875910835098679659803",
+			},
+		},
+	},
+	credential: {
+		owner: {
+			_type: "PublicKey",
+			value: "B62qqCMx9YvvjhMFVcRXBqHtAbjWWUhyA9HmgpYCehLHTGKgXsxiZpz",
+		},
+		data: {
+			age: {
+				_type: "Field",
+				value: "25",
+			},
+		},
+	},
+};
+
 export const TestZkApp = () => {
 	const [currentProvider, setCurrentProvider] = useLocalStorage(
 		"minajs:provider",
@@ -12,6 +42,9 @@ export const TestZkApp = () => {
 	);
 	const [message, setMessage] = useState("A message to sign");
 	const [fields, setFields] = useState('["1", "2", "3"]');
+	const [credentialInput, setCredentialInput] = useState(
+		JSON.stringify(sampleCredential, null, 2),
+	);
 	const [transactionBody, setTransactionBody] = useObjectState({
 		to: "B62qnVUL6A53E4ZaGd3qbTr6RCtEZYTu3kTijVrrquNpPo4d3MuJ3nb",
 		amount: "3000000000",
@@ -27,11 +60,31 @@ export const TestZkApp = () => {
 		mina_signFields: "",
 		mina_signTransaction: "",
 		mina_switchChain: "",
+		mina_storePrivateCredential: "",
 	});
 	const providers = useSyncExternalStore(store.subscribe, store.getProviders);
 	const provider = providers.find(
 		(p) => p.info.slug === currentProvider,
 	)?.provider;
+
+	const storePrivateCredential = async () => {
+		if (!provider) return;
+		try {
+			const parsedCredential = JSON.parse(credentialInput);
+			const { result } = await provider.request({
+				method: "mina_storePrivateCredential",
+				params: [parsedCredential],
+			});
+			setResults(() => ({
+				mina_storePrivateCredential: JSON.stringify(result, null, 2),
+			}));
+		} catch (error) {
+			setResults(() => ({
+				mina_storePrivateCredential: `Error: ${error.message}`,
+			}));
+		}
+	};
+
 	const fetchAccounts = async () => {
 		if (!provider) return;
 		const { result } = await provider.request({
@@ -397,6 +450,35 @@ export const TestZkApp = () => {
 					</div>
 				</div>
 			</section>
+			<section className="card bg-neutral">
+				<div className="card-body gap-4">
+					<h2 className="card-title">Store Private Credential</h2>
+					<p>mina_storePrivateCredential</p>
+					<div className="flex flex-col gap-2">
+						<div className="flex flex-col gap-4">
+							<textarea
+								value={credentialInput}
+								onChange={(event) => setCredentialInput(event.target.value)}
+								className="textarea textarea-bordered h-48 font-mono text-sm"
+								placeholder="Enter credential JSON..."
+							/>
+							<button
+								type="button"
+								className="btn btn-primary"
+								onClick={storePrivateCredential}
+							>
+								Store Private Credential
+							</button>
+						</div>
+						<label>Result</label>
+						<textarea
+							value={results.mina_storePrivateCredential}
+							readOnly
+							className="textarea textarea-bordered h-24 resize-none font-mono"
+						/>
+					</div>
+				</div>
+			</section>
 		</main>
 	);
 };
diff --git a/packages/providers/src/validation.ts b/packages/providers/src/validation.ts
index 2423a89..f7ce318 100644
--- a/packages/providers/src/validation.ts
+++ b/packages/providers/src/validation.ts
@@ -7,6 +7,7 @@ import {
 	SignedFieldsSchema,
 	SignedMessageSchema,
 	SignedTransactionSchema,
+	StoredCredentialSchema,
 	TransactionPayloadSchema,
 	TransactionReceiptSchema,
 	TypedSendableSchema,
@@ -85,6 +86,11 @@ export const GetStateRequestParamsSchema = RequestWithContext.extend({
 	method: z.literal("mina_getState"),
 	params: z.array(JsonSchema),
 }).strict();
+export const StorePrivateCredentialRequestParamsSchema =
+	RequestWithContext.extend({
+		method: z.literal("mina_storePrivateCredential"),
+		params: z.array(StoredCredentialSchema),
+	}).strict();
 
 // Returns
 export const AccountsRequestReturnSchema = z
@@ -171,6 +177,12 @@ export const GetStateRequestReturnSchema = z
 		result: JsonSchema,
 	})
 	.strict();
+export const StorePrivateCredentialReturnSchema = z
+	.object({
+		method: z.literal("mina_storePrivateCredential"),
+		result: z.object({ success: z.boolean() }).strict(),
+	})
+	.strict();
 
 export const RpcReturnTypesUnion = z.discriminatedUnion("method", [
 	AccountsRequestReturnSchema,
@@ -187,6 +199,7 @@ export const RpcReturnTypesUnion = z.discriminatedUnion("method", [
 	AddChainRequestReturnSchema,
 	SetStateRequestReturnSchema,
 	GetStateRequestReturnSchema,
+	StorePrivateCredentialReturnSchema,
 ]);
 
 export const ProviderRequestParamsUnion = z.discriminatedUnion("method", [
@@ -204,6 +217,7 @@ export const ProviderRequestParamsUnion = z.discriminatedUnion("method", [
 	AddChainRequestParamsSchema,
 	SetStateRequestParamsSchema,
 	GetStateRequestParamsSchema,
+	StorePrivateCredentialRequestParamsSchema,
 ]);
 export type RpcReturnTypesUnionType = z.infer<typeof RpcReturnTypesUnion>;
 export type ResultType<M extends string> = {
diff --git a/packages/utils/src/types.ts b/packages/utils/src/types.ts
index b523f96..ff76188 100644
--- a/packages/utils/src/types.ts
+++ b/packages/utils/src/types.ts
@@ -12,6 +12,7 @@ import type {
 	SignedFieldsSchema,
 	SignedMessageSchema,
 	SignedTransactionSchema,
+	StoredCredentialSchema,
 	TransactionBodySchema,
 	TransactionPayloadSchema,
 	TransactionReceiptSchema,
@@ -48,3 +49,8 @@ export type TransactionReceipt = z.infer<typeof TransactionReceiptSchema>;
 export type KlesiaRpcMethodType = z.infer<typeof KlesiaRpcMethod>;
 export type KlesiaRpcRequestType = z.infer<typeof KlesiaRpcMethodSchema>;
 export type KlesiaRpcResponseType = z.infer<typeof KlesiaRpcResponseSchema>;
+
+/**
+ * Private Credential types
+ */
+export type StoredPrivateCredential = z.infer<typeof StoredCredentialSchema>;
diff --git a/packages/utils/src/validation.ts b/packages/utils/src/validation.ts
index b173013..b3cf68a 100644
--- a/packages/utils/src/validation.ts
+++ b/packages/utils/src/validation.ts
@@ -240,3 +240,203 @@ export const KlesiaRpcResponseSchema = z.union([
 	]),
 	ErrorSchema,
 ]);
+
+// TODO: Should probably move these validations to a separate file
+
+interface ProofType {
+	name: string;
+	publicInput: SerializedType;
+	publicOutput: SerializedType;
+	maxProofsVerified: number;
+	featureFlags: Record<string, unknown>;
+}
+
+interface SerializedType {
+	_type?: string;
+	// TODO: update based on mina-credentials
+	type?: "Constant";
+	value?: string;
+	size?: number;
+	proof?: ProofType;
+	innerType?: SerializedType;
+	[key: string]: SerializedType | string | number | ProofType | undefined;
+}
+
+// Private Credentials: Serialized Type and Value Schemas
+
+const SerializedValueSchema = z
+	.object({
+		_type: z.string(),
+		value: JsonSchema,
+		properties: z.record(z.any()).optional(),
+	})
+	.strict();
+
+const ProofTypeSchema: z.ZodType<ProofType> = z.lazy(() =>
+	z
+		.object({
+			name: z.string(),
+			publicInput: SerializedTypeSchema,
+			publicOutput: SerializedTypeSchema,
+			maxProofsVerified: z.number(),
+			featureFlags: z.record(z.any()),
+		})
+		.strict(),
+);
+
+const SerializedTypeSchema: z.ZodType<SerializedType> = z.lazy(() =>
+	z.union([
+		// Basic type
+		z
+			.object({
+				_type: z.string(),
+			})
+			.strict(),
+		// Constant type
+		z
+			.object({
+				type: z.literal("Constant"),
+				value: z.string(),
+			})
+			.strict(),
+		// Bytes type
+		z
+			.object({
+				_type: z.literal("Bytes"),
+				size: z.number(),
+			})
+			.strict(),
+		// Proof type
+		z
+			.object({
+				_type: z.literal("Proof"),
+				proof: ProofTypeSchema,
+			})
+			.strict(),
+		// Array type
+		z
+			.object({
+				_type: z.literal("Array"),
+				innerType: SerializedTypeSchema,
+				size: z.number(),
+			})
+			.strict(),
+		// Allow records of nested types for Struct
+		z.record(SerializedTypeSchema),
+	]),
+);
+
+const SerializedFieldSchema = z
+	.object({
+		_type: z.literal("Field"),
+		value: z.string(),
+	})
+	.strict();
+
+const SerializedPublicKeySchema = z
+	.object({
+		_type: z.literal("PublicKey"),
+		value: z.string(),
+	})
+	.strict();
+
+const SerializedPublicKeyTypeSchema = z
+	.object({
+		_type: z.literal("PublicKey"),
+	})
+	.strict();
+
+const SerializedSignatureSchema = z
+	.object({
+		_type: z.literal("Signature"),
+		value: z.object({
+			r: z.string(),
+			s: z.string(),
+		}),
+	})
+	.strict();
+
+// Private Credentials: Witness Schemas
+
+const SimpleWitnessSchema = z
+	.object({
+		type: z.literal("simple"),
+		issuer: SerializedPublicKeySchema,
+		issuerSignature: SerializedSignatureSchema,
+	})
+	.strict();
+
+const RecursiveWitnessSchema = z
+	.object({
+		type: z.literal("recursive"),
+		vk: z
+			.object({
+				data: z.string(),
+				hash: SerializedFieldSchema,
+			})
+			.strict(),
+		proof: z
+			.object({
+				_type: z.literal("Proof"),
+				value: z
+					.object({
+						publicInput: JsonSchema,
+						publicOutput: JsonSchema,
+						maxProofsVerified: z.number().min(0).max(2),
+						proof: z.string(),
+					})
+					.strict(),
+			})
+			.strict(),
+	})
+	.strict();
+
+const UnsignedWitnessSchema = z
+	.object({
+		type: z.literal("unsigned"),
+	})
+	.strict();
+
+const WitnessSchema = z.discriminatedUnion("type", [
+	SimpleWitnessSchema,
+	RecursiveWitnessSchema,
+	UnsignedWitnessSchema,
+]);
+
+// Private Credentials: Credential Schemas
+
+const SimpleCredentialSchema = z
+	.object({
+		owner: SerializedPublicKeySchema,
+		data: z.record(SerializedValueSchema),
+	})
+	.strict();
+
+const StructCredentialSchema = z
+	.object({
+		_type: z.literal("Struct"),
+		properties: z
+			.object({
+				owner: SerializedPublicKeyTypeSchema,
+				data: JsonSchema,
+			})
+			.strict(),
+		value: z
+			.object({
+				owner: PublicKeySchema,
+				data: JsonSchema,
+			})
+			.strict(),
+	})
+	.strict();
+
+// Private Credentials: Stored Credential Schema
+
+export const StoredCredentialSchema = z
+	.object({
+		version: z.literal("v0"),
+		witness: WitnessSchema,
+		metadata: JsonSchema.optional(),
+		credential: z.union([SimpleCredentialSchema, StructCredentialSchema]),
+	})
+	.strict();