diff --git a/config/credential/Credential.go b/config/credential/Credential.go
new file mode 100644
index 0000000..b09c7c4
--- /dev/null
+++ b/config/credential/Credential.go
@@ -0,0 +1,44 @@
+package credential
+
+import (
+	"encoding/json"
+	"errors"
+
+	"git.loafle.net/overflow/model/meta"
+)
+
+type Credential struct {
+}
+
+type CredentialMap map[string]*Credential
+
+func (m *CredentialMap) UnmarshalJSON(data []byte) error {
+	credentials := make(map[string]json.RawMessage)
+	err := json.Unmarshal(data, &credentials)
+	if nil != err {
+		return err
+	}
+
+	result := make(CredentialMap)
+	for k, v := range credentials {
+		var i interface{}
+
+		switch meta.ToMetaCredentialTypeEnum(&meta.MetaCredentialType{Key: k}) {
+		case meta.MetaCredentialTypeEnumSNMP:
+			i = &SNMPCredential{}
+		case meta.MetaCredentialTypeEnumWindows:
+			i = &WindowsCredential{}
+		default:
+			return errors.New("Unrecognized Credential")
+		}
+
+		err := json.Unmarshal(v, i)
+		if nil != err {
+			return err
+		}
+		result[k] = i.(*Credential)
+	}
+	*m = result
+
+	return nil
+}
diff --git a/config/credential/SNMPCredential.go b/config/credential/SNMPCredential.go
new file mode 100644
index 0000000..ce42ae5
--- /dev/null
+++ b/config/credential/SNMPCredential.go
@@ -0,0 +1,17 @@
+package credential
+
+import "encoding/json"
+
+type SNMPCredential struct {
+	Credential
+	Version            string      `json:"version,omitempty"`
+	Community          string      `json:"community,omitempty"`
+	AuthenticationType string      `json:"authenticationType,omitempty"`
+	User               string      `json:"user,omitempty"`
+	Password           string      `json:"password,omitempty"`
+	EncryptionType     string      `json:"encryptionType,omitempty"`
+	DataEncryptionKey  string      `json:"dataEncryptionKey,omitempty"`
+	ContextName        string      `json:"contextName,omitempty"`
+	Port               json.Number `json:"port,Number,omitempty"`
+	Timeout            json.Number `json:"timeout,Number,omitempty"`
+}
diff --git a/config/credential/UnixCredential.go b/config/credential/UnixCredential.go
new file mode 100644
index 0000000..85e6a77
--- /dev/null
+++ b/config/credential/UnixCredential.go
@@ -0,0 +1,15 @@
+package credential
+
+import "encoding/json"
+
+type UnixCredential struct {
+	Credential
+	User                   string      `json:"user,omitempty"`
+	LoginType              string      `json:"loginType,omitempty"`
+	Password               string      `json:"password,omitempty"`
+	PrivateKey             string      `json:"privateKey,omitempty"`
+	SSHPort                json.Number `json:"sshPort,Number,omitempty"`
+	SSHRightsElevationType string      `json:"sshRightsElevationType,omitempty"`
+	TargetUser             string      `json:"targetUser,omitempty"`
+	TargetUserPassword     string      `json:"targetUserPassword,omitempty"`
+}
diff --git a/config/credential/WindowsCredential.go b/config/credential/WindowsCredential.go
new file mode 100644
index 0000000..81bac02
--- /dev/null
+++ b/config/credential/WindowsCredential.go
@@ -0,0 +1,8 @@
+package credential
+
+type WindowsCredential struct {
+	Credential
+	DomainName string `json:"domainName,omitempty"`
+	User       string `json:"user,omitempty"`
+	Password   string `json:"password,omitempty"`
+}
diff --git a/discovery/DiscoveryConfig.go b/discovery/DiscoveryConfig.go
new file mode 100644
index 0000000..e24517b
--- /dev/null
+++ b/discovery/DiscoveryConfig.go
@@ -0,0 +1,9 @@
+package discovery
+
+import (
+	"git.loafle.net/overflow/model/config/credential"
+)
+
+type DiscoveryConfig struct {
+	Credentials credential.CredentialMap `json:"credentials,omitempty"`
+}
diff --git a/meta/MetaCredentialType.go b/meta/MetaCredentialType.go
new file mode 100644
index 0000000..8bd9b7e
--- /dev/null
+++ b/meta/MetaCredentialType.go
@@ -0,0 +1,71 @@
+package meta
+
+import (
+	"encoding/json"
+
+	"git.loafle.net/overflow/model/util"
+)
+
+type MetaCredentialType struct {
+	ID         json.Number     `json:"id,Number,omitempty"`
+	Name       string          `json:"name,omitempty"`
+	Key        string          `json:"key,omitempty"`
+	CreateDate *util.Timestamp `json:"createDate,omitempty"`
+}
+
+type MetaCredentialTypeEnum int
+
+const (
+	MetaCredentialTypeEnumNONE MetaCredentialTypeEnum = iota + 1
+	MetaCredentialTypeEnumWindows
+	MetaCredentialTypeEnumLinux
+	MetaCredentialTypeEnumSolaris
+	MetaCredentialTypeEnumMacOS
+	MetaCredentialTypeEnumVMWare
+	MetaCredentialTypeEnumXenServer
+	MetaCredentialTypeEnumSNMP
+	MetaCredentialTypeEnumDatabase
+	MetaCredentialTypeEnumAmazoneCloudWatch
+)
+
+var (
+	metaCredentialTypeEnumID = map[MetaCredentialTypeEnum]string{
+		MetaCredentialTypeEnumNONE:              "NONE",
+		MetaCredentialTypeEnumWindows:           "WINDOWS",
+		MetaCredentialTypeEnumLinux:             "LINUX",
+		MetaCredentialTypeEnumSolaris:           "SOLARIS",
+		MetaCredentialTypeEnumMacOS:             "MACOS",
+		MetaCredentialTypeEnumVMWare:            "VMWARE",
+		MetaCredentialTypeEnumXenServer:         "XENSERVER",
+		MetaCredentialTypeEnumSNMP:              "SNMP",
+		MetaCredentialTypeEnumDatabase:          "DATABASE",
+		MetaCredentialTypeEnumAmazoneCloudWatch: "AMAZON_CLOUDWATCH",
+	}
+
+	metaCredentialTypeEnumKey = map[string]MetaCredentialTypeEnum{
+		"NONE":              MetaCredentialTypeEnumNONE,
+		"WINDOWS":           MetaCredentialTypeEnumWindows,
+		"LINUX":             MetaCredentialTypeEnumLinux,
+		"SOLARIS":           MetaCredentialTypeEnumSolaris,
+		"MACOS":             MetaCredentialTypeEnumMacOS,
+		"VMWARE":            MetaCredentialTypeEnumVMWare,
+		"XENSERVER":         MetaCredentialTypeEnumXenServer,
+		"SNMP":              MetaCredentialTypeEnumSNMP,
+		"DATABASE":          MetaCredentialTypeEnumDatabase,
+		"AMAZON_CLOUDWATCH": MetaCredentialTypeEnumAmazoneCloudWatch,
+	}
+)
+
+func (e MetaCredentialTypeEnum) String() string {
+	return metaCredentialTypeEnumID[e]
+}
+
+func ToMetaCredentialTypeEnum(v *MetaCredentialType) MetaCredentialTypeEnum {
+	return metaCredentialTypeEnumKey[v.Key]
+}
+
+func ToMetaCredentialType(v MetaCredentialTypeEnum) *MetaCredentialType {
+	return &MetaCredentialType{
+		Key: metaCredentialTypeEnumID[v],
+	}
+}