diff --git a/backend/openapi.yaml b/backend/openapi.yaml
index 3060a05506..f6f3b6db34 100644
--- a/backend/openapi.yaml
+++ b/backend/openapi.yaml
@@ -3117,8 +3117,15 @@ components:
               name:
                 type: string
               typ:
-                type: string
-                enum: ["str", "float", "int", "bool", "unknown"]
+                oneOf:
+                  - type: string
+                    enum: ["str", "float", "int", "bool", "unknown"]
+                  - type: object
+                    properties:
+                      resourcetype:
+                        type: string
+                    required:
+                      - resourcetype
               has_default:
                 type: boolean
               default: {}
diff --git a/backend/src/parser.rs b/backend/src/parser.rs
index ac48a5a443..31af756ae6 100644
--- a/backend/src/parser.rs
+++ b/backend/src/parser.rs
@@ -36,6 +36,7 @@ pub enum Typ {
     List,
     Bytes,
     Datetime,
+    ResourceType(String),
     Unknown,
 }
 
@@ -119,7 +120,7 @@ use swc_common::sync::Lrc;
 use swc_common::{FileName, SourceMap};
 use swc_ecma_ast::{
     AssignPat, BindingIdent, Decl, ExportDecl, FnDecl, Ident, ModuleDecl, ModuleItem, Pat,
-    TsKeywordTypeKind, TsType,
+    TsEntityName, TsKeywordTypeKind, TsType, TsTypeRef,
 };
 use swc_ecma_parser::{lexer::Lexer, Parser, StringInput, Syntax, TsConfig};
 
@@ -239,6 +240,33 @@ fn binding_ident_to_arg(
                 },
                 // TODO: we can do better here and extract the inner type of array
                 TsType::TsArrayType(_) => Typ::List,
+                TsType::TsTypeRef(TsTypeRef {
+                    span: _,
+                    type_name:
+                        TsEntityName::Ident(Ident {
+                            span: _,
+                            sym,
+                            optional: _,
+                        }),
+                    type_params,
+                }) => {
+                    println!("N{sym:?}\nP{type_params:?}");
+                    match sym.to_string().as_str() {
+                        "ResourceType" => Typ::ResourceType(
+                            type_params
+                                .as_ref()
+                                .and_then(|x| {
+                                    x.params.get(0).and_then(|y| {
+                                        y.as_ts_lit_type().and_then(|z| {
+                                            z.lit.as_str().map(|a| a.to_owned().value.to_string())
+                                        })
+                                    })
+                                })
+                                .unwrap_or_else(|| "unknown".to_string()),
+                        ),
+                        _ => Typ::Unknown,
+                    }
+                }
                 _ => Typ::Unknown,
             })
             .unwrap_or(Typ::Unknown),
@@ -724,7 +752,8 @@ def main():
     fn test_parse_deno_sig() -> anyhow::Result<()> {
         let code = "
 
-export function main(test1: string, test2: string = \"burkina\") {
+export function main(test1: string, test2: string = \"burkina\",
+    test3: ResourceType<'rt'>, email: email_string) {
     console.log(42)
 }
 
diff --git a/deno-client/index.ts b/deno-client/index.ts
index 1bdfdcd890..8124bf1467 100644
--- a/deno-client/index.ts
+++ b/deno-client/index.ts
@@ -7,6 +7,11 @@ export {
     UserApi, WorkspaceApi
 } from './windmill-api/index.ts'
 
+export type string_regex<S extends string> = String
+export type string_email = String
+
+export type ResourceType<S extends string> = {}
+
 /**
  * Create a client configuration from env variables
  * @returns client configuration
diff --git a/frontend/src/infer.ts b/frontend/src/infer.ts
index 91bb59da98..a60025f6f0 100644
--- a/frontend/src/infer.ts
+++ b/frontend/src/infer.ts
@@ -31,7 +31,7 @@ export async function inferArgs(
 			} else {
 				schema.properties[arg.name] = oldProperties[arg.name]
 			}
-			pythonToJsonSchemaType(arg.typ, schema.properties[arg.name])
+			argSigToJsonSchemaType(arg.typ, schema.properties[arg.name])
 			schema.properties[arg.name].default = arg.default
 
 			if (!arg.has_default) {
@@ -44,7 +44,7 @@ export async function inferArgs(
 	}
 }
 
-function pythonToJsonSchemaType(t: string, s: SchemaProperty): void {
+function argSigToJsonSchemaType(t: string | { resourcetype: string }, s: SchemaProperty): void {
 	if (t === 'int') {
 		s.type = 'integer'
 	} else if (t === 'float') {
@@ -63,6 +63,9 @@ function pythonToJsonSchemaType(t: string, s: SchemaProperty): void {
 	} else if (t === 'datetime') {
 		s.type = 'string'
 		s.format = 'date-time'
+	} else if (typeof t !== 'string' && t.resourcetype != undefined) {
+		s.type = 'object'
+		s.format = `resource-${t.resourcetype}`
 	} else {
 		s.type = undefined
 	}