diff --git a/checker/interactive.go b/checker/interactive.go
new file mode 100644
index 0000000..4c00bd5
--- /dev/null
+++ b/checker/interactive.go
@@ -0,0 +1,48 @@
+package checker
+
+import (
+	"errors"
+	"net/http"
+	"strings"
+
+	sdk "git.happydns.org/checker-sdk-go/checker"
+)
+
+// RenderForm implements sdk.CheckerInteractive.
+func (p *matrixProvider) RenderForm() []sdk.CheckerOptionField {
+	return []sdk.CheckerOptionField{
+		{
+			Id:          "serviceDomain",
+			Type:        "string",
+			Label:       "Matrix domain",
+			Placeholder: "matrix.org",
+			Required:    true,
+		},
+		{
+			Id:          "federationTesterServer",
+			Type:        "string",
+			Label:       "Federation Tester Server",
+			Placeholder: "https://federationtester.matrix.org/api/report?server_name=%s",
+			Default:     "https://federationtester.matrix.org/api/report?server_name=%s",
+			Description: "URL template of the federation tester API; %s is replaced by the domain.",
+		},
+	}
+}
+
+// ParseForm implements sdk.CheckerInteractive.
+func (p *matrixProvider) ParseForm(r *http.Request) (sdk.CheckerOptions, error) {
+	domain := strings.TrimSpace(r.FormValue("serviceDomain"))
+	if domain == "" {
+		return nil, errors.New("Matrix domain is required")
+	}
+
+	opts := sdk.CheckerOptions{
+		"serviceDomain": domain,
+	}
+
+	if tester := strings.TrimSpace(r.FormValue("federationTesterServer")); tester != "" {
+		opts["federationTesterServer"] = tester
+	}
+
+	return opts, nil
+}