diff --git a/model/offer/offer-apis.smithy b/model/offer/offer-apis.smithy
new file mode 100644
index 0000000..2645640
--- /dev/null
+++ b/model/offer/offer-apis.smithy
@@ -0,0 +1,80 @@
+$version: "2"
+
+namespace com.shopping.inandout.offer
+
+use com.shopping.inandout#ResourceAlreadyExistsError
+use com.shopping.inandout#ResourceNotFoundError
+use com.shopping.inandout.util#ID
+use com.shopping.inandout.util#NaturalNumber
+use com.shopping.inandout.util#Percentage
+use com.shopping.inandout.util#Slug
+use com.shopping.inandout.util#SlugList
+use com.shopping.inandout.util#TimeRange
+use com.shopping.inandout.util#UIDList
+
+resource Offer {
+    identifiers: {
+        brandSlug: Slug
+        offerId: ID
+    }
+    properties: {
+        percentage: Percentage
+        storeIdList: UIDList
+        articleSlugList: SlugList
+        dependencyList: DependencyList
+        timeRange: TimeRange
+        lifetime: NaturalNumber
+        createdAt: Timestamp
+        updatedAt: Timestamp
+    }
+    create: CreateOffer
+    read: GetOffer
+    list: ListOffers
+    update: UpdateOffer
+    delete: DeleteOffer
+}
+
+@http(method: "POST", uri: "/api/brands/{brandSlug}/offers")
+operation CreateOffer {
+    input: CreateOfferInput
+    output: OfferSummary
+    errors: [
+        ResourceAlreadyExistsError
+    ]
+}
+
+@readonly
+@http(method: "GET", uri: "/api/brands/{brandSlug}/offers/{offerId}")
+operation GetOffer {
+    input: GetOfferInput
+    output: OfferSummary
+    errors: [
+        ResourceNotFoundError
+    ]
+}
+
+@readonly
+@paginated
+@http(method: "GET", uri: "/api/brands/{brandSlug}/offers")
+operation ListOffers {
+    input: ListOffersInput
+    output: OfferSummaries
+}
+
+@http(method: "PATCH", uri: "/api/brands/{brandSlug}/offers/{offerId}")
+@documentation("Non-idempotent cascading operation, creates/deletes internal resources as needed")
+operation UpdateOffer {
+    input: UpdateOfferInput
+    output: OfferSummary
+    errors: [
+        ResourceNotFoundError
+    ]
+}
+
+@idempotent
+@http(method: "DELETE", uri: "/api/brands/{brandSlug}/offers/{offerId}")
+@documentation("Not restricted cascading operation, deletes discounts, dependencies, etc.")
+operation DeleteOffer {
+    input: DeleteOfferInput
+    output: OfferSummary
+}
diff --git a/model/offer/offer-io.smithy b/model/offer/offer-io.smithy
new file mode 100644
index 0000000..fb497b5
--- /dev/null
+++ b/model/offer/offer-io.smithy
@@ -0,0 +1,81 @@
+$version: "2"
+
+namespace com.shopping.inandout.offer
+
+use com.shopping.inandout.util#ID
+use com.shopping.inandout.util#InputPagination
+use com.shopping.inandout.util#NaturalNumber
+use com.shopping.inandout.util#Percentage
+use com.shopping.inandout.util#Slug
+use com.shopping.inandout.util#SlugList
+use com.shopping.inandout.util#TimeRange
+use com.shopping.inandout.util#UIDList
+
+structure CreateOfferInput {
+    @required
+    @httpLabel
+    brandSlug: Slug
+
+    @required
+    percentage: Percentage
+
+    storeIdList: UIDList
+
+    @required
+    articleSlugList: SlugList
+
+    dependencyList: DependencyList
+
+    timeRange: TimeRange
+
+    @required
+    lifetime: NaturalNumber
+}
+
+structure GetOfferInput {
+    @required
+    @httpLabel
+    brandSlug: Slug
+
+    @required
+    @httpLabel
+    offerId: ID
+}
+
+structure ListOffersInput with [InputPagination] {
+    @required
+    @httpLabel
+    brandSlug: Slug
+}
+
+structure UpdateOfferInput {
+    @required
+    @httpLabel
+    brandSlug: Slug
+
+    @required
+    @httpLabel
+    offerId: ID
+
+    percentage: Percentage
+
+    storeIdList: UIDList
+
+    articleSlugList: SlugList
+
+    dependencyList: DependencyList
+
+    timeRange: TimeRange
+
+    lifetime: NaturalNumber
+}
+
+structure DeleteOfferInput {
+    @required
+    @httpLabel
+    brandSlug: Slug
+
+    @required
+    @httpLabel
+    offerId: ID
+}
diff --git a/model/offer/offer-types.smithy b/model/offer/offer-types.smithy
new file mode 100644
index 0000000..4bd90b6
--- /dev/null
+++ b/model/offer/offer-types.smithy
@@ -0,0 +1,61 @@
+$version: "2"
+
+namespace com.shopping.inandout.offer
+
+use com.shopping.inandout.util#ID
+use com.shopping.inandout.util#NaturalNumber
+use com.shopping.inandout.util#OutputPagination
+use com.shopping.inandout.util#Percentage
+use com.shopping.inandout.util#Slug
+use com.shopping.inandout.util#SlugList
+use com.shopping.inandout.util#TimeRange
+use com.shopping.inandout.util#UIDList
+
+@documentation("Product dependency; it must be bought in order for the offer to activate.")
+structure Dependency {
+    @required
+    articleSlug: Slug
+
+    quantity: NaturalNumber
+}
+
+list DependencyList {
+    member: Dependency
+}
+
+structure OfferSummary {
+    @required
+    brandSlug: Slug
+
+    @required
+    offerId: ID
+
+    @required
+    percentage: Percentage
+
+    storeIdList: UIDList
+
+    @required
+    articleSlugList: SlugList
+
+    dependencyList: DependencyList
+
+    timeRange: TimeRange
+
+    @required
+    lifetime: NaturalNumber
+
+    @required
+    createdAt: Timestamp
+
+    @required
+    updatedAt: Timestamp
+}
+
+list OfferSummaryList {
+    member: OfferSummary
+}
+
+structure OfferSummaries with [OutputPagination] {
+    tokens: OfferSummaryList
+}