diff --git a/contracts/Marketplace.sol b/contracts/Marketplace.sol
index 1f70bb9..bb2cd1b 100644
--- a/contracts/Marketplace.sol
+++ b/contracts/Marketplace.sol
@@ -19,9 +19,14 @@ contract Marketplace is SlotReservations, Proofs, StateRetrieval, Endian {
   error Marketplace_InvalidExpiry();
   error Marketplace_InvalidMaxSlotLoss();
   error Marketplace_InsufficientSlots();
+  error Marketplace_InsufficientDuration();
+  error Marketplace_InsufficientProofProbability();
+  error Marketplace_InsufficientCollateral();
+  error Marketplace_InsufficientReward();
   error Marketplace_InvalidClientAddress();
   error Marketplace_RequestAlreadyExists();
   error Marketplace_InvalidSlot();
+  error Marketplace_InvalidCid();
   error Marketplace_SlotNotFree();
   error Marketplace_InvalidSlotHost();
   error Marketplace_AlreadyPaid();
@@ -126,6 +131,21 @@ contract Marketplace is SlotReservations, Proofs, StateRetrieval, Endian {
     if (request.ask.slots == 0) revert Marketplace_InsufficientSlots();
     if (request.ask.maxSlotLoss > request.ask.slots)
       revert Marketplace_InvalidMaxSlotLoss();
+    if (request.ask.duration == 0) {
+      revert Marketplace_InsufficientDuration();
+    }
+    if (request.ask.proofProbability == 0) {
+      revert Marketplace_InsufficientProofProbability();
+    }
+    if (request.ask.collateral == 0) {
+      revert Marketplace_InsufficientCollateral();
+    }
+    if (request.ask.reward == 0) {
+      revert Marketplace_InsufficientReward();
+    }
+    if (bytes(request.content.cid).length == 0) {
+      revert Marketplace_InvalidCid();
+    }
 
     _requests[id] = request;
     _requestContexts[id].endsAt = block.timestamp + request.ask.duration;
diff --git a/test/Marketplace.test.js b/test/Marketplace.test.js
index e2fefd6..a997c94 100644
--- a/test/Marketplace.test.js
+++ b/test/Marketplace.test.js
@@ -238,6 +238,44 @@ describe("Marketplace", function () {
         "Marketplace_RequestAlreadyExists"
       )
     })
+
+    it("is rejected when insufficient duration", async function () {
+      request.ask.duration = 0
+      await expect(marketplace.requestStorage(request)).to.be.revertedWith(
+        // request.expiry has to be > 0 and
+        // request.expiry < request.ask.duration
+        // so request.ask.duration will trigger "Marketplace_InvalidExpiry"
+        "Marketplace_InvalidExpiry"
+      )
+    })
+
+    it("is rejected when insufficient proofProbability", async function () {
+      request.ask.proofProbability = 0
+      await expect(marketplace.requestStorage(request)).to.be.revertedWith(
+        "Marketplace_InsufficientProofProbability"
+      )
+    })
+
+    it("is rejected when insufficient collateral", async function () {
+      request.ask.collateral = 0
+      await expect(marketplace.requestStorage(request)).to.be.revertedWith(
+        "Marketplace_InsufficientCollateral"
+      )
+    })
+
+    it("is rejected when insufficient reward", async function () {
+      request.ask.reward = 0
+      await expect(marketplace.requestStorage(request)).to.be.revertedWith(
+        "Marketplace_InsufficientReward"
+      )
+    })
+
+    it("is rejected when cid is missing", async function () {
+      request.content.cid = ""
+      await expect(marketplace.requestStorage(request)).to.be.revertedWith(
+        "Marketplace_InvalidCid"
+      )
+    })
   })
 
   describe("filling a slot with collateral", function () {