diff --git a/src/core/input.ts b/src/core/input.ts
index 2e17ff6..69492ac 100644
--- a/src/core/input.ts
+++ b/src/core/input.ts
@@ -14,7 +14,8 @@ export function classifyInput(input: string, chain?: ChainKey): InputType {
       chain === "litecoin" ||
       chain === "ecash" ||
       chain === "tron" ||
-      chain === "cardano") &&
+      chain === "cardano" ||
+      chain === "pepecoin") &&
       /^[0-9a-fA-F]{64}$/.test(trimmed)) ||
     (chain === "solana" && /^[1-9A-HJ-NP-Za-km-z]{64,88}$/.test(trimmed)) ||
     (chain === "sui" && /^[1-9A-HJ-NP-Za-km-z]{43,44}$/.test(trimmed))
diff --git a/src/core/types.ts b/src/core/types.ts
index 7046a0f..91f4952 100644
--- a/src/core/types.ts
+++ b/src/core/types.ts
@@ -143,7 +143,13 @@ export interface ContractInfo {
 }
 
 /** Unit used by a provider's fee suggestions. */
-export type GasUnit = "gwei" | "sat/vB" | "litoshi/vB" | "micro-lamports/CU" | "MIST";
+export type GasUnit =
+  | "gwei"
+  | "sat/vB"
+  | "litoshi/vB"
+  | "pepetoshi/vB"
+  | "micro-lamports/CU"
+  | "MIST";
 
 /** Gas or fee-market data in provider-native units. */
 export interface GasData {
diff --git a/src/providers/index.ts b/src/providers/index.ts
index a530ad3..2a72cb3 100644
--- a/src/providers/index.ts
+++ b/src/providers/index.ts
@@ -51,7 +51,7 @@ export const builtins: readonly ProviderEntry[] = [
   },
   {
     key: "mempool",
-    chains: ["bitcoin", "litecoin"],
+    chains: ["bitcoin", "litecoin", "pepecoin"],
     defaultURL: "https://mempool.space",
     load: () => import("./mempool.js").then((m) => m.Mempool),
   },
diff --git a/src/providers/mempool.ts b/src/providers/mempool.ts
index f6b7881..744d1c0 100644
--- a/src/providers/mempool.ts
+++ b/src/providers/mempool.ts
@@ -33,12 +33,14 @@ const DEFAULT_BASE = "https://mempool.space";
 const CHAIN_BASES: Partial<Record<ChainKey, string>> = {
   bitcoin: DEFAULT_BASE,
   litecoin: "https://litecoinspace.org",
+  pepecoin: "https://peppool.space",
 };
 
 /** Fee rates come back in the chain's smallest unit per virtual byte. */
 const FEE_UNITS: Partial<Record<ChainKey, GasUnit>> = {
   bitcoin: "sat/vB",
   litecoin: "litoshi/vB",
+  pepecoin: "pepetoshi/vB",
 };
 
 interface MempoolAddressSummary {
diff --git a/test/unit/mempool.test.ts b/test/unit/mempool.test.ts
index b3b1bd4..5b913fc 100644
--- a/test/unit/mempool.test.ts
+++ b/test/unit/mempool.test.ts
@@ -12,6 +12,9 @@ const KNOWN_BTC = "bc1qxy2kgdygjrsqtzq2n0yrf2493p83kkfjhx0wlh";
 // A Litecoin mining pool address with tens of thousands of transactions
 const KNOWN_LTC = "LfdYLbP9F9CpmCX6atZnHZb8KkS8T6x4DK";
 
+// A Pepecoin address
+const KNOWN_PEP = "Pu5spyDwNEQxmWLkUHv779AWNkpMdQ29SZ";
+
 afterEach(() => {
   vi.unstubAllGlobals();
 });
@@ -102,6 +105,40 @@ describe("mempool provider", () => {
     expect(gas.unit).toBe("litoshi/vB");
   });
 
+  it("getBalance returns PEP balance from peppool", async () => {
+    const balance = await provider.getBalance(KNOWN_PEP, "pepecoin");
+
+    expect(balance.address).toBe(KNOWN_PEP);
+    expect(balance.chain).toBe("pepecoin");
+    expect(balance.symbol).toBe("PEP");
+    expect(balance.balance).toMatch(/^-?\d+$/);
+    expect(Number(balance.balanceFormatted)).toBeGreaterThanOrEqual(0);
+  });
+
+  it("routes pepecoin calls to peppool.space", async () => {
+    const fetch = stubJSON({
+      chain_stats: {
+        funded_txo_count: 1,
+        funded_txo_sum: 10,
+        spent_txo_count: 0,
+        spent_txo_sum: 0,
+      },
+    });
+
+    await provider.getBalance(KNOWN_PEP, "pepecoin");
+
+    expect(String(fetch.mock.calls[0]?.[0])).toBe(`https://peppool.space/api/address/${KNOWN_PEP}`);
+  });
+
+  it("labels pepecoin fee estimates in pepetoshi/vB", async () => {
+    stubJSON({ fastestFee: 2, halfHourFee: 1, hourFee: 1, economyFee: 1, minimumFee: 1 });
+
+    const gas = await provider.getGasData!("pepecoin");
+
+    expect(gas.chain).toBe("pepecoin");
+    expect(gas.unit).toBe("pepetoshi/vB");
+  });
+
   it("joins custom base URLs with exactly one separator", async () => {
     const fetch = vi.fn(async () => {
       return new Response(
diff --git a/test/unit/resolve.test.ts b/test/unit/resolve.test.ts
index 0123020..a943040 100644
--- a/test/unit/resolve.test.ts
+++ b/test/unit/resolve.test.ts
@@ -47,6 +47,7 @@ describe("resolveProvider", () => {
 
     expect(resolveProvider(undefined, "bitcoin")).toBe("mempool");
     expect(resolveProvider(undefined, "litecoin")).toBe("mempool");
+    expect(resolveProvider(undefined, "pepecoin")).toBe("mempool");
   });
 
   it("keeps a configured provider that serves the requested chain", () => {