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diff --git a/packages/taler-harness/src/integrationtests/test-exchange-purse.ts b/packages/taler-harness/src/integrationtests/test-exchange-purse.ts
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+++ b/packages/taler-harness/src/integrationtests/test-exchange-purse.ts
@@ -0,0 +1,224 @@
+/*
+ This file is part of GNU Taler
+ (C) 2023 Taler Systems S.A.
+
+ GNU Taler is free software; you can redistribute it and/or modify it under the
+ terms of the GNU General Public License as published by the Free Software
+ Foundation; either version 3, or (at your option) any later version.
+
+ GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along with
+ GNU Taler; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+/**
+ * Imports.
+ */
+import {
+  AbsoluteTime,
+  AmountString,
+  ContractTermsUtil,
+  decodeCrock,
+  Duration,
+  encodeCrock,
+  getRandomBytes,
+  hash,
+  j2s,
+  PeerContractTerms,
+  TalerError,
+} from "@gnu-taler/taler-util";
+import {
+  CryptoDispatcher,
+  EncryptContractRequest,
+  SpendCoinDetails,
+  SynchronousCryptoWorkerFactoryPlain,
+} from "@gnu-taler/taler-wallet-core";
+import {
+  checkReserve,
+  downloadExchangeInfo,
+  findDenomOrThrow,
+  topupReserveWithBank,
+  withdrawCoin,
+} from "@gnu-taler/taler-wallet-core/dbless";
+import { GlobalTestState, harnessHttpLib } from "../harness/harness.js";
+import { createSimpleTestkudosEnvironmentV2 } from "../harness/helpers.js";
+
+/**
+ * Test the exchange's purse API.
+ */
+export async function runExchangePurseTest(t: GlobalTestState) {
+  // Set up test environment
+
+  const { bank, exchange } = await createSimpleTestkudosEnvironmentV2(t);
+
+  const http = harnessHttpLib;
+  const cryptoDisp = new CryptoDispatcher(
+    new SynchronousCryptoWorkerFactoryPlain(),
+  );
+  const cryptoApi = cryptoDisp.cryptoApi;
+
+  try {
+    // Withdraw digital cash into the wallet.
+
+    const exchangeInfo = await downloadExchangeInfo(exchange.baseUrl, http);
+
+    const reserveKeyPair = await cryptoApi.createEddsaKeypair({});
+
+    let reserveUrl = new URL(
+      `reserves/${reserveKeyPair.pub}`,
+      exchange.baseUrl,
+    );
+    reserveUrl.searchParams.set("timeout_ms", "30000");
+    const longpollReq = http.fetch(reserveUrl.href, {
+      method: "GET",
+    });
+
+    await topupReserveWithBank({
+      amount: "TESTKUDOS:10" as AmountString,
+      http,
+      reservePub: reserveKeyPair.pub,
+      corebankApiBaseUrl: bank.corebankApiBaseUrl,
+      exchangeInfo,
+    });
+
+    console.log("waiting for longpoll request");
+    const resp = await longpollReq;
+    console.log(`got response, status ${resp.status}`);
+
+    console.log(exchangeInfo);
+
+    await checkReserve(http, exchange.baseUrl, reserveKeyPair.pub);
+
+    const d1 = findDenomOrThrow(
+      exchangeInfo,
+      "TESTKUDOS:8" as AmountString,
+      {},
+    );
+
+    const coin = await withdrawCoin({
+      http,
+      cryptoApi,
+      reserveKeyPair: {
+        reservePriv: reserveKeyPair.priv,
+        reservePub: reserveKeyPair.pub,
+      },
+      denom: d1,
+      exchangeBaseUrl: exchange.baseUrl,
+    });
+
+    const amount = "TESTKUDOS:5" as AmountString;
+
+    const contractTerms: PeerContractTerms = {
+      amount,
+      summary: "Hello",
+      purse_expiration: AbsoluteTime.toProtocolTimestamp(
+        AbsoluteTime.addDuration(
+          AbsoluteTime.now(),
+          Duration.fromSpec({ minutes: 1 }),
+        ),
+      ),
+    };
+
+    const mergeReservePair = await cryptoApi.createEddsaKeypair({});
+    const pursePair = await cryptoApi.createEddsaKeypair({});
+    const mergePair = await cryptoApi.createEddsaKeypair({});
+    const contractPair = await cryptoApi.createEddsaKeypair({});
+    const contractEncNonce = encodeCrock(getRandomBytes(24));
+
+    const pursePub = pursePair.pub;
+
+    const hContractTerms = ContractTermsUtil.hashContractTerms(contractTerms);
+
+    const purseSigResp = await cryptoApi.signPurseCreation({
+      hContractTerms,
+      mergePub: mergePair.pub,
+      minAge: 0,
+      purseAmount: amount,
+      purseExpiration: contractTerms.purse_expiration,
+      pursePriv: pursePair.priv,
+    });
+
+    const coinSpend: SpendCoinDetails = {
+      ageCommitmentProof: undefined,
+      coinPriv: coin.coinPriv,
+      coinPub: coin.coinPub,
+      contribution: amount,
+      denomPubHash: coin.denomPubHash,
+      denomSig: coin.denomSig,
+    };
+
+    const depositSigsResp = await cryptoApi.signPurseDeposits({
+      exchangeBaseUrl: exchange.baseUrl,
+      pursePub: pursePair.pub,
+      coins: [coinSpend],
+    });
+
+    const encryptContractRequest: EncryptContractRequest = {
+      contractTerms: contractTerms,
+      mergePriv: mergePair.priv,
+      pursePriv: pursePair.priv,
+      pursePub: pursePair.pub,
+      contractPriv: contractPair.priv,
+      contractPub: contractPair.pub,
+      nonce: contractEncNonce,
+    };
+
+    const econtractResp = await cryptoApi.encryptContractForMerge(
+      encryptContractRequest,
+    );
+
+    const econtractHash = encodeCrock(
+      hash(decodeCrock(econtractResp.econtract.econtract)),
+    );
+
+    const createPurseUrl = new URL(
+      `purses/${pursePair.pub}/create`,
+      exchange.baseUrl,
+    );
+
+    const reqBody = {
+      amount: amount,
+      merge_pub: mergePair.pub,
+      purse_sig: purseSigResp.sig,
+      h_contract_terms: hContractTerms,
+      purse_expiration: contractTerms.purse_expiration,
+      deposits: depositSigsResp.deposits,
+      min_age: 0,
+      econtract: econtractResp.econtract,
+    };
+
+    const httpResp = await http.fetch(createPurseUrl.href, {
+      method: "POST",
+      body: reqBody,
+    });
+
+    const respBody = await httpResp.json();
+
+    console.log("status", httpResp.status);
+
+    console.log(j2s(respBody));
+
+    const mergeUrl = new URL(`purses/${pursePub}/merge`, exchange.baseUrl);
+    mergeUrl.searchParams.set("timeout_ms", "300");
+    const statusResp = await http.fetch(mergeUrl.href, {});
+
+    const statusRespBody = await statusResp.json();
+
+    console.log(j2s(statusRespBody));
+
+    t.assertTrue(statusRespBody.merge_timestamp === undefined);
+  } catch (e) {
+    if (e instanceof TalerError) {
+      console.log(e);
+      console.log(j2s(e.errorDetail));
+    } else {
+      console.log(e);
+    }
+    throw e;
+  }
+}
+
+runExchangePurseTest.suites = ["wallet"];