diff --git a/.travis.yml b/.travis.yml
index 9f50bdb011..33f9cb5d21 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -33,7 +33,7 @@ cache:
 env:
   global:
     # If changing this number, please also change it in `testing/testing.go`.
-    - STRIPE_MOCK_VERSION=0.54.0
+    - STRIPE_MOCK_VERSION=0.56.0
 
 go:
   - "1.9.x"
diff --git a/capability.go b/capability.go
new file mode 100644
index 0000000000..c09b28ecce
--- /dev/null
+++ b/capability.go
@@ -0,0 +1,88 @@
+package stripe
+
+import "encoding/json"
+
+// CapabilityDisabledReason describes why a capability is disabled.
+type CapabilityDisabledReason string
+
+// List of values that CapabilityDisabledReason can take.
+const (
+	CapabilityDisabledReasonPendingOnboarding        CapabilityDisabledReason = "pending.onboarding"
+	CapabilityDisabledReasonPendingReview            CapabilityDisabledReason = "pending.review"
+	CapabilityDisabledReasonRejectedFraud            CapabilityDisabledReason = "rejected_fraud"
+	CapabilityDisabledReasonRejectedListed           CapabilityDisabledReason = "rejected.listed"
+	CapabilityDisabledReasonRejectedOther            CapabilityDisabledReason = "rejected.other"
+	CapabilityDisabledReasonRequirementsFieldsNeeded CapabilityDisabledReason = "requirement.fields_needed"
+)
+
+// CapabilityStatus describes the different statuses for a capability's status.
+type CapabilityStatus string
+
+// List of values that CapabilityStatus can take.
+const (
+	CapabilityStatusActive      CapabilityStatus = "active"
+	CapabilityStatusInactive    CapabilityStatus = "inactive"
+	CapabilityStatusPending     CapabilityStatus = "pending"
+	CapabilityStatusUnrequested CapabilityStatus = "unrequested"
+)
+
+// CapabilityParams is the set of parameters that can be used when updating a capability.
+// For more details see https://stripe.com/docs/api/capabilities/update
+type CapabilityParams struct {
+	Params    `form:"*"`
+	Account   *string `form:"-"` // Included in URL
+	Requested *bool   `form:"requested"`
+}
+
+// CapabilityListParams is the set of parameters that can be used when listing capabilities.
+// For more detail see https://stripe.com/docs/api/capabilities/list
+type CapabilityListParams struct {
+	ListParams `form:"*"`
+	Account    *string `form:"-"` // Included in URL
+}
+
+// CapabilityRequirements represents information that needs to be collected for a capability.
+type CapabilityRequirements struct {
+	CurrentDeadline int64                    `json:"current_deadline"`
+	CurrentlyDue    []string                 `json:"currently_due"`
+	DisabledReason  CapabilityDisabledReason `json:"disabled_reason"`
+	EventuallyDue   []string                 `json:"eventually_due"`
+	PastDue         []string                 `json:"past_due"`
+}
+
+// Capability is the resource representing a Stripe capability.
+// For more details see https://stripe.com/docs/api/capabilities
+type Capability struct {
+	Account      *Account                `json:"account"`
+	ID           string                  `json:"id"`
+	Object       string                  `json:"object"`
+	Requested    bool                    `json:"requested"`
+	RequestedAt  int64                   `json:"requested_at"`
+	Requirements *CapabilityRequirements `json:"requirements"`
+	Status       CapabilityStatus        `json:"status"`
+}
+
+// CapabilityList is a list of capabilities as retrieved from a list endpoint.
+type CapabilityList struct {
+	ListMeta
+	Data []*Capability `json:"data"`
+}
+
+// UnmarshalJSON handles deserialization of a Capability.
+// This custom unmarshaling is needed because the resulting
+// property may be an id or the full struct if it was expanded.
+func (c *Capability) UnmarshalJSON(data []byte) error {
+	if id, ok := ParseID(data); ok {
+		c.ID = id
+		return nil
+	}
+
+	type capability Capability
+	var v capability
+	if err := json.Unmarshal(data, &v); err != nil {
+		return err
+	}
+
+	*c = Capability(v)
+	return nil
+}
diff --git a/capability/client.go b/capability/client.go
new file mode 100644
index 0000000000..3e2a7faa67
--- /dev/null
+++ b/capability/client.go
@@ -0,0 +1,84 @@
+// Package capability provides the /accounts/capabilities APIs
+package capability
+
+import (
+	"fmt"
+	"net/http"
+
+	stripe "github.com/stripe/stripe-go"
+	"github.com/stripe/stripe-go/form"
+)
+
+// Client is used to invoke /accounts/capabilities APIs.
+type Client struct {
+	B   stripe.Backend
+	Key string
+}
+
+// Get returns the details of a account capability.
+func Get(id string, params *stripe.CapabilityParams) (*stripe.Capability, error) {
+	return getC().Get(id, params)
+}
+
+// Get returns the details of a account capability.
+func (c Client) Get(id string, params *stripe.CapabilityParams) (*stripe.Capability, error) {
+	if params == nil {
+		return nil, fmt.Errorf("params cannot be nil, and params.Account must be set")
+	}
+
+	path := stripe.FormatURLPath("/v1/accounts/%s/capabilities/%s",
+		stripe.StringValue(params.Account), id)
+	capability := &stripe.Capability{}
+	err := c.B.Call(http.MethodGet, path, c.Key, params, capability)
+	return capability, err
+}
+
+// Update updates a account capability's properties.
+func Update(id string, params *stripe.CapabilityParams) (*stripe.Capability, error) {
+	return getC().Update(id, params)
+}
+
+// Update updates a account capability's properties.
+func (c Client) Update(id string, params *stripe.CapabilityParams) (*stripe.Capability, error) {
+	path := stripe.FormatURLPath("/v1/accounts/%s/capabilities/%s",
+		stripe.StringValue(params.Account), id)
+	capability := &stripe.Capability{}
+	err := c.B.Call(http.MethodPost, path, c.Key, params, capability)
+	return capability, err
+}
+
+// List returns a list of account capabilities.
+func List(params *stripe.CapabilityListParams) *Iter {
+	return getC().List(params)
+}
+
+// List returns a list of account capabilities.
+func (c Client) List(listParams *stripe.CapabilityListParams) *Iter {
+	path := stripe.FormatURLPath("/v1/accounts/%s/capabilities", stripe.StringValue(listParams.Account))
+
+	return &Iter{stripe.GetIter(listParams, func(p *stripe.Params, b *form.Values) ([]interface{}, stripe.ListMeta, error) {
+		list := &stripe.CapabilityList{}
+		err := c.B.CallRaw(http.MethodGet, path, c.Key, b, p, list)
+
+		ret := make([]interface{}, len(list.Data))
+		for i, v := range list.Data {
+			ret[i] = v
+		}
+
+		return ret, list.ListMeta, err
+	})}
+}
+
+// Iter is an iterator for account capabilities.
+type Iter struct {
+	*stripe.Iter
+}
+
+// Capability returns the account capability which the iterator is currently pointing to.
+func (i *Iter) Capability() *stripe.Capability {
+	return i.Current().(*stripe.Capability)
+}
+
+func getC() Client {
+	return Client{stripe.GetBackend(stripe.APIBackend), stripe.Key}
+}
diff --git a/capability/client_test.go b/capability/client_test.go
new file mode 100644
index 0000000000..e3819df8fc
--- /dev/null
+++ b/capability/client_test.go
@@ -0,0 +1,37 @@
+package capability
+
+import (
+	"testing"
+
+	assert "github.com/stretchr/testify/require"
+	stripe "github.com/stripe/stripe-go"
+	_ "github.com/stripe/stripe-go/testing"
+)
+
+func TestCapabilityGet(t *testing.T) {
+	capability, err := Get("acap_123", &stripe.CapabilityParams{
+		Account: stripe.String("acct_123"),
+	})
+	assert.Nil(t, err)
+	assert.NotNil(t, capability)
+}
+
+func TestCapabilityList(t *testing.T) {
+	i := List(&stripe.CapabilityListParams{
+		Account: stripe.String("acct_123"),
+	})
+
+	// Verify that we can get at least one capability
+	assert.True(t, i.Next())
+	assert.Nil(t, i.Err())
+	assert.NotNil(t, i.Capability())
+}
+
+func TestCapabilityUpdate(t *testing.T) {
+	capability, err := Update("acap_123", &stripe.CapabilityParams{
+		Account:   stripe.String("acct_123"),
+		Requested: stripe.Bool(true),
+	})
+	assert.Nil(t, err)
+	assert.NotNil(t, capability)
+}
diff --git a/client/api.go b/client/api.go
index b9f0d075c3..3d38367430 100644
--- a/client/api.go
+++ b/client/api.go
@@ -10,6 +10,7 @@ import (
 	"github.com/stripe/stripe-go/bankaccount"
 	"github.com/stripe/stripe-go/bitcoinreceiver"
 	"github.com/stripe/stripe-go/bitcointransaction"
+	"github.com/stripe/stripe-go/capability"
 	"github.com/stripe/stripe-go/card"
 	"github.com/stripe/stripe-go/charge"
 	checkoutsession "github.com/stripe/stripe-go/checkout/session"
@@ -90,6 +91,8 @@ type API struct {
 	BitcoinReceivers *bitcoinreceiver.Client
 	// BitcoinTransactions is the client used to invoke /bitcoin/transactions APIs.
 	BitcoinTransactions *bitcointransaction.Client
+	// Capabilities is the client used to invoke capability related APIs.
+	Capabilities *capability.Client
 	// Cards is the client used to invoke card related APIs.
 	Cards *card.Client
 	// Charges is the client used to invoke /charges APIs.
@@ -233,6 +236,7 @@ func (a *API) Init(key string, backends *stripe.Backends) {
 	a.BankAccounts = &bankaccount.Client{B: backends.API, Key: key}
 	a.BitcoinReceivers = &bitcoinreceiver.Client{B: backends.API, Key: key}
 	a.BitcoinTransactions = &bitcointransaction.Client{B: backends.API, Key: key}
+	a.Capabilities = &capability.Client{B: backends.API, Key: key}
 	a.Cards = &card.Client{B: backends.API, Key: key}
 	a.Charges = &charge.Client{B: backends.API, Key: key}
 	a.CheckoutSessions = &checkoutsession.Client{B: backends.API, Key: key}
diff --git a/testing/testing.go b/testing/testing.go
index 075d5e438b..b9ab2cfc03 100644
--- a/testing/testing.go
+++ b/testing/testing.go
@@ -25,7 +25,7 @@ const (
 	// added in a more recent version of stripe-mock, we can show people a
 	// better error message instead of the test suite crashing with a bunch of
 	// confusing 404 errors or the like.
-	MockMinimumVersion = "0.54.0"
+	MockMinimumVersion = "0.56.0"
 
 	// TestMerchantID is a token that can be used to represent a merchant ID in
 	// simple tests.