diff --git a/examples/verifier/package.json b/examples/verifier/package.json
index 4fcf300a..b4275b27 100644
--- a/examples/verifier/package.json
+++ b/examples/verifier/package.json
@@ -29,5 +29,8 @@
     "agentcommercekit": "workspace:*",
     "hono": "catalog:",
     "valibot": "catalog:"
+  },
+  "devDependencies": {
+    "vite-tsconfig-paths": "6.1.1"
   }
 }
diff --git a/examples/verifier/src/routes/verify.test.ts b/examples/verifier/src/routes/verify.test.ts
new file mode 100644
index 00000000..47295d27
--- /dev/null
+++ b/examples/verifier/src/routes/verify.test.ts
@@ -0,0 +1,355 @@
+import {
+  bytesToHexString,
+  createControllerCredential,
+  createCredential,
+  createDidWebDocumentFromKeypair,
+  createDidWebUri,
+  createJwtSigner,
+  createPaymentReceipt,
+  DidResolver,
+  generateKeypair,
+  getDidResolver,
+  parseJwtCredential,
+  signCredential,
+  type DidUri,
+  type Keypair,
+} from "agentcommercekit"
+import {
+  afterEach,
+  beforeAll,
+  beforeEach,
+  describe,
+  expect,
+  it,
+  vi,
+} from "vitest"
+
+import app from "../index"
+
+// Mock the DID resolver to return our pre-populated cache
+vi.mock("agentcommercekit", async () => {
+  const actual = await vi.importActual("agentcommercekit")
+  return {
+    ...actual,
+    getDidResolver: vi.fn<() => DidResolver>(),
+  }
+})
+
+describe("Verifier Example Service", () => {
+  let trustedIssuerKeypair: Keypair
+  let trustedIssuerDid: DidUri
+  let untrustedIssuerKeypair: Keypair
+  let untrustedIssuerDid: DidUri
+  let controllerKeypair: Keypair
+  let controllerDid: DidUri
+  let targetKeypair: Keypair
+  let targetDid: DidUri
+  let resolver: DidResolver
+
+  beforeAll(async () => {
+    // Trusted issuer as configured in verify.ts: http://localhost:3456
+    trustedIssuerKeypair = await generateKeypair("secp256k1")
+    trustedIssuerDid = createDidWebUri(new URL("http://localhost:3456"))
+
+    // Untrusted issuer
+    untrustedIssuerKeypair = await generateKeypair("secp256k1")
+    untrustedIssuerDid = createDidWebUri(
+      new URL("https://untrusted-issuer.example.com"),
+    )
+
+    // Controller and controlled agent
+    controllerKeypair = await generateKeypair("secp256k1")
+    controllerDid = createDidWebUri(new URL("https://controller.example.com"))
+
+    targetKeypair = await generateKeypair("secp256k1")
+    targetDid = createDidWebUri(new URL("https://target.example.com"))
+
+    process.env.VERIFIER_PRIVATE_KEY = bytesToHexString(
+      trustedIssuerKeypair.privateKey,
+    )
+    process.env.BASE_URL = "https://verifier.example.com"
+  })
+
+  beforeEach(() => {
+    resolver = new DidResolver()
+
+    // Add trusted issuer DID document
+    const { didDocument: trustedIssuerDoc } = createDidWebDocumentFromKeypair({
+      keypair: trustedIssuerKeypair,
+      baseUrl: "http://localhost:3456",
+      encoding: "jwk",
+    })
+    resolver.addToCache(trustedIssuerDid, trustedIssuerDoc)
+
+    // Add untrusted issuer DID document
+    const { didDocument: untrustedIssuerDoc } = createDidWebDocumentFromKeypair(
+      {
+        keypair: untrustedIssuerKeypair,
+        baseUrl: "https://untrusted-issuer.example.com",
+        encoding: "jwk",
+      },
+    )
+    resolver.addToCache(untrustedIssuerDid, untrustedIssuerDoc)
+
+    // Add controller DID document
+    const { didDocument: controllerDoc } = createDidWebDocumentFromKeypair({
+      keypair: controllerKeypair,
+      baseUrl: "https://controller.example.com",
+      encoding: "jwk",
+    })
+    resolver.addToCache(controllerDid, controllerDoc)
+
+    // Add target agent DID document with controller set
+    const { didDocument: targetDoc } = createDidWebDocumentFromKeypair({
+      keypair: targetKeypair,
+      baseUrl: "https://target.example.com",
+      controller: controllerDid,
+      encoding: "jwk",
+    })
+    resolver.addToCache(targetDid, targetDoc)
+
+    vi.mocked(getDidResolver).mockReturnValue(resolver)
+  })
+
+  afterEach(() => {
+    vi.clearAllMocks()
+  })
+
+  describe("POST /verify", () => {
+    it("verifies a valid JWT-encoded ControllerCredential", async () => {
+      const baseCredential = createControllerCredential({
+        issuer: trustedIssuerDid,
+        controller: controllerDid,
+        subject: targetDid,
+      })
+
+      const jwt = await signCredential(baseCredential, {
+        did: trustedIssuerDid,
+        signer: createJwtSigner(trustedIssuerKeypair),
+      })
+
+      const res = await app.request("/verify", {
+        method: "POST",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({ credential: jwt }),
+      })
+
+      expect(res.status).toBe(200)
+      const json = await res.json()
+      expect(json).toEqual({
+        ok: true,
+        data: null,
+      })
+    })
+
+    it("verifies a valid JSON-object ControllerCredential", async () => {
+      const baseCredential = createControllerCredential({
+        issuer: trustedIssuerDid,
+        controller: controllerDid,
+        subject: targetDid,
+      })
+
+      const jwt = await signCredential(baseCredential, {
+        did: trustedIssuerDid,
+        signer: createJwtSigner(trustedIssuerKeypair),
+      })
+
+      const parsed = await parseJwtCredential(jwt, resolver)
+
+      const res = await app.request("/verify", {
+        method: "POST",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({ credential: parsed }),
+      })
+
+      expect(res.status).toBe(200)
+      const json = await res.json()
+      expect(json).toEqual({
+        ok: true,
+        data: null,
+      })
+    })
+
+    it("verifies a valid PaymentReceiptCredential", async () => {
+      const baseCredential = createPaymentReceipt({
+        paymentRequestToken: "test.jwt.token",
+        paymentOptionId: "option-1",
+        issuer: trustedIssuerDid,
+        payerDid: targetDid,
+      })
+
+      const jwt = await signCredential(baseCredential, {
+        did: trustedIssuerDid,
+        signer: createJwtSigner(trustedIssuerKeypair),
+      })
+
+      const res = await app.request("/verify", {
+        method: "POST",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({ credential: jwt }),
+      })
+
+      expect(res.status).toBe(200)
+      const json = await res.json()
+      expect(json).toEqual({
+        ok: true,
+        data: null,
+      })
+    })
+
+    it("rejects a credential from an untrusted issuer", async () => {
+      const baseCredential = createControllerCredential({
+        issuer: untrustedIssuerDid,
+        controller: controllerDid,
+        subject: targetDid,
+      })
+
+      const jwt = await signCredential(baseCredential, {
+        did: untrustedIssuerDid,
+        signer: createJwtSigner(untrustedIssuerKeypair),
+      })
+
+      const res = await app.request("/verify", {
+        method: "POST",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({ credential: jwt }),
+      })
+
+      expect(res.status).toBe(400)
+      const json = await res.json()
+      expect(json.ok).toBe(false)
+      expect(json.error).toContain("Issuer is not trusted")
+    })
+
+    it("rejects a credential with an invalid or tampered proof", async () => {
+      const baseCredential = createControllerCredential({
+        issuer: trustedIssuerDid,
+        controller: controllerDid,
+        subject: targetDid,
+      })
+
+      const jwt = await signCredential(baseCredential, {
+        did: trustedIssuerDid,
+        signer: createJwtSigner(trustedIssuerKeypair),
+      })
+
+      const parsed = await parseJwtCredential(jwt, resolver)
+      // Tamper with the proof JWT signature
+      const tampered = {
+        ...parsed,
+        proof: {
+          ...parsed.proof,
+          // oxlint-disable-next-line typescript/no-unsafe-type-assertion
+          jwt: (parsed.proof.jwt.slice(0, -5) +
+            "xxxxx") as unknown as typeof parsed.proof.jwt,
+        },
+      }
+
+      const res = await app.request("/verify", {
+        method: "POST",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({ credential: tampered }),
+      })
+
+      expect(res.status).toBe(400)
+      const json = await res.json()
+      expect(json.ok).toBe(false)
+      expect(json.error).toBe("Invalid proof")
+    })
+
+    it("rejects an expired credential", async () => {
+      // Create credential expiring in 10 seconds
+      const expirationDate = new Date(Date.now() + 10 * 1000)
+      const baseCredential = createCredential({
+        type: "ControllerCredential",
+        issuer: trustedIssuerDid,
+        subject: targetDid,
+        expirationDate,
+        attestation: {
+          controller: controllerDid,
+        },
+      })
+
+      const jwt = await signCredential(baseCredential, {
+        did: trustedIssuerDid,
+        signer: createJwtSigner(trustedIssuerKeypair),
+      })
+
+      const parsed = await parseJwtCredential(jwt, resolver)
+
+      // Advance time past expirationDate
+      vi.useFakeTimers()
+      vi.setSystemTime(new Date(Date.now() + 60 * 1000))
+
+      try {
+        const res = await app.request("/verify", {
+          method: "POST",
+          headers: { "Content-Type": "application/json" },
+          body: JSON.stringify({ credential: parsed }),
+        })
+
+        expect(res.status).toBe(400)
+        const json = await res.json()
+        expect(json.ok).toBe(false)
+        expect(json.error).toBe("Credential is expired")
+      } finally {
+        vi.useRealTimers()
+      }
+    })
+
+    it("rejects a controller credential with mismatched controller", async () => {
+      const baseCredential = createControllerCredential({
+        issuer: trustedIssuerDid,
+        controller: untrustedIssuerDid, // Mismatched controller (target DID doc points to controllerDid)
+        subject: targetDid,
+      })
+
+      const jwt = await signCredential(baseCredential, {
+        did: trustedIssuerDid,
+        signer: createJwtSigner(trustedIssuerKeypair),
+      })
+
+      const res = await app.request("/verify", {
+        method: "POST",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({ credential: jwt }),
+      })
+
+      expect(res.status).toBe(400)
+      const json = await res.json()
+      expect(json.ok).toBe(false)
+      expect(json.error).toBe("Invalid controller claim")
+    })
+
+    it("rejects an invalid request body that violates schema", async () => {
+      const res = await app.request("/verify", {
+        method: "POST",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({ credential: 12345 }),
+      })
+
+      expect(res.status).toBe(400)
+    })
+  })
+
+  describe("GET /ping", () => {
+    it("returns pong with timestamp", async () => {
+      const res = await app.request("/ping")
+      expect(res.status).toBe(200)
+      const json = await res.json()
+      expect(json.ok).toBe(true)
+      expect(typeof json.data.pong).toBe("string")
+      expect(new Date(json.data.pong).toISOString()).toBe(json.data.pong)
+    })
+  })
+
+  describe("GET /.well-known/did.json", () => {
+    it("returns the verifier DID document", async () => {
+      const res = await app.request("/.well-known/did.json")
+      expect(res.status).toBe(200)
+      const json = await res.json()
+      expect(json.id).toBe("did:web:verifier.example.com")
+      expect(json.verificationMethod).toBeDefined()
+    })
+  })
+})
diff --git a/examples/verifier/vitest.config.ts b/examples/verifier/vitest.config.ts
index 7972f77b..0ccd5299 100644
--- a/examples/verifier/vitest.config.ts
+++ b/examples/verifier/vitest.config.ts
@@ -1,6 +1,8 @@
+import tsconfigPaths from "vite-tsconfig-paths"
 import { defineConfig } from "vitest/config"
 
 export default defineConfig({
+  plugins: [tsconfigPaths()],
   test: {
     passWithNoTests: true,
     watch: false,
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 856c25e9..49c74907 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -321,6 +321,10 @@ importers:
       valibot:
         specifier: 'catalog:'
         version: 1.4.1(typescript@6.0.3)
+    devDependencies:
+      vite-tsconfig-paths:
+        specifier: 6.1.1
+        version: 6.1.1(typescript@6.0.3)(vite@7.3.5(@types/node@25.9.4)(jiti@2.7.0)(tsx@4.22.4)(yaml@2.9.0))
 
   packages/ack-id:
     dependencies: