diff --git a/bounded-collections/Cargo.toml b/bounded-collections/Cargo.toml
index 17a9ecb4..fb14da38 100644
--- a/bounded-collections/Cargo.toml
+++ b/bounded-collections/Cargo.toml
@@ -13,12 +13,14 @@ serde = { version = "1.0.101", default-features = false, optional = true, featur
 codec = { version = "3.3.0", default-features = false, features = ["max-encoded-len"], package = "parity-scale-codec" }
 scale-info = { version = ">=1.0, <3", features = ["derive"], default-features = false }
 log = { version = "0.4.17", default-features = false }
+schemars = { version = ">=0.8.12", default-features = true, optional = true }
 
 [dev-dependencies]
 serde_json = "1.0.41"
 
 [features]
 default = ["std"]
+json-schema = ["dep:schemars"]
 std = [
     "log/std",
     "codec/std",
diff --git a/bounded-collections/src/bounded_vec.rs b/bounded-collections/src/bounded_vec.rs
index cd26afb1..3d426995 100644
--- a/bounded-collections/src/bounded_vec.rs
+++ b/bounded-collections/src/bounded_vec.rs
@@ -43,6 +43,7 @@ use serde::{
 #[cfg_attr(feature = "serde", derive(Serialize), serde(transparent))]
 #[derive(Encode, scale_info::TypeInfo)]
 #[scale_info(skip_type_params(S))]
+#[cfg_attr(feature = "json-schema", derive(schemars::JsonSchema))]
 pub struct BoundedVec<T, S>(pub(super) Vec<T>, #[cfg_attr(feature = "serde", serde(skip_serializing))] PhantomData<S>);
 
 /// Create an object through truncation.
diff --git a/primitive-types/Cargo.toml b/primitive-types/Cargo.toml
index 7aa3d2e9..d642effc 100644
--- a/primitive-types/Cargo.toml
+++ b/primitive-types/Cargo.toml
@@ -16,6 +16,7 @@ impl-codec = { version = "0.6.0", path = "impls/codec", default-features = false
 impl-num-traits = { version = "0.1.0", path = "impls/num-traits", default-features = false, optional = true }
 impl-rlp = { version = "0.3", path = "impls/rlp", default-features = false, optional = true }
 scale-info-crate = { package = "scale-info", version = ">=0.9, <3", features = ["derive"], default-features = false, optional = true }
+schemars = { version = ">=0.8.12", default-features = true, optional = true }
 
 [dev-dependencies]
 num-traits = "0.2"
@@ -26,6 +27,7 @@ std = ["uint/std", "fixed-hash/std", "impl-codec?/std"]
 byteorder = ["fixed-hash/byteorder"]
 rustc-hex = ["fixed-hash/rustc-hex"]
 serde = ["std", "impl-serde", "impl-serde/std"]
+json-schema = ["dep:schemars"]
 serde_no_std = ["impl-serde"]
 codec = ["impl-codec"]
 scale-info = ["codec", "scale-info-crate"]
diff --git a/primitive-types/src/lib.rs b/primitive-types/src/lib.rs
index dd372a9e..d80a312f 100644
--- a/primitive-types/src/lib.rs
+++ b/primitive-types/src/lib.rs
@@ -105,6 +105,23 @@ mod serde {
 	impl_fixed_hash_serde!(H768, 96);
 }
 
+// true that no need std, but need to do no_std alloc than, so simplified for now
+// also no macro, but easy to create
+#[cfg(all(feature = "std", feature = "json-schema"))]
+mod json_schema {
+	use super::*;
+
+	impl schemars::JsonSchema for H160 {
+		fn schema_name() -> String {
+			"0xPrefixedHexString".to_string()
+		}
+
+		fn json_schema(gen: &mut schemars::gen::SchemaGenerator) -> schemars::schema::Schema {
+			String::json_schema(gen)
+		}
+	}
+}
+
 #[cfg(feature = "impl-codec")]
 mod codec {
 	use super::*;