diff --git a/Cargo.lock b/Cargo.lock
index 2f5fa4eb0..70d7fadf3 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4658,7 +4658,7 @@ dependencies = [
 [[package]]
 name = "wasi-experimental-http-wasmtime"
 version = "0.9.0"
-source = "git+https://github.com/deislabs/wasi-experimental-http?rev=4ed321d6943f75546e38bba80e14a59797aa29de#4ed321d6943f75546e38bba80e14a59797aa29de"
+source = "git+https://github.com/deislabs/wasi-experimental-http?rev=9a143fa7d8be2a66d6d636c5c1b0c6e2bad68912#9a143fa7d8be2a66d6d636c5c1b0c6e2bad68912"
 dependencies = [
  "anyhow",
  "bytes 1.1.0",
@@ -4689,7 +4689,7 @@ dependencies = [
  "tracing",
  "tracing-futures",
  "url 2.2.2",
- "wasi-experimental-http-wasmtime 0.9.0 (git+https://github.com/deislabs/wasi-experimental-http?rev=4ed321d6943f75546e38bba80e14a59797aa29de)",
+ "wasi-experimental-http-wasmtime 0.9.0 (git+https://github.com/deislabs/wasi-experimental-http?rev=9a143fa7d8be2a66d6d636c5c1b0c6e2bad68912)",
  "wit-bindgen-wasmtime",
 ]
 
diff --git a/crates/outbound-http/Cargo.toml b/crates/outbound-http/Cargo.toml
index 2302c5105..f54e4f388 100644
--- a/crates/outbound-http/Cargo.toml
+++ b/crates/outbound-http/Cargo.toml
@@ -19,5 +19,5 @@ tokio = { version = "1.4.0", features = [ "full" ] }
 tracing = { version = "0.1", features = [ "log" ] }
 tracing-futures = "0.2"
 url = "2.2.1"
-wasi-experimental-http-wasmtime = { git = "https://github.com/deislabs/wasi-experimental-http", rev = "4ed321d6943f75546e38bba80e14a59797aa29de" }
-wit-bindgen-wasmtime = { git = "https://github.com/bytecodealliance/wit-bindgen", rev = "2f46ce4cc072107153da0cefe15bdc69aa5b84d0" }
\ No newline at end of file
+wasi-experimental-http-wasmtime = { git = "https://github.com/deislabs/wasi-experimental-http", rev = "9a143fa7d8be2a66d6d636c5c1b0c6e2bad68912" }
+wit-bindgen-wasmtime = { git = "https://github.com/bytecodealliance/wit-bindgen", rev = "2f46ce4cc072107153da0cefe15bdc69aa5b84d0" }
diff --git a/crates/outbound-http/src/lib.rs b/crates/outbound-http/src/lib.rs
index f1fd0bf43..d0c558ef0 100644
--- a/crates/outbound-http/src/lib.rs
+++ b/crates/outbound-http/src/lib.rs
@@ -12,6 +12,8 @@ pub use wasi_outbound_http::add_to_linker;
 
 wit_bindgen_wasmtime::export!("../../wit/ephemeral/wasi-outbound-http.wit");
 
+const ALLOW_ALL_HOSTS: &str = "insecure:allow-all";
+
 /// A very simple implementation for outbound HTTP requests.
 #[derive(Default, Clone)]
 pub struct OutboundHttp {
@@ -25,7 +27,8 @@ impl OutboundHttp {
     }
 
     /// Check if guest module is allowed to send request to URL, based on the list of
-    /// allowed hosts defined by the runtime.
+    /// allowed hosts defined by the runtime. If the list of allowed hosts contains
+    /// `insecure:allow-all`, then all hosts are allowed.
     /// If `None` is passed, the guest module is not allowed to send the request.
     fn is_allowed(url: &str, allowed_hosts: Option<Vec<String>>) -> Result<bool, HttpError> {
         let url_host = Url::parse(url)
@@ -35,13 +38,20 @@ impl OutboundHttp {
             .to_owned();
         match allowed_hosts.as_deref() {
             Some(domains) => {
-                let allowed: Result<Vec<_>, _> = domains.iter().map(|d| Url::parse(d)).collect();
-                let allowed = allowed.map_err(|_| HttpError::InvalidUrl)?;
-
-                Ok(allowed
-                    .iter()
-                    .map(|u| u.host_str().unwrap())
-                    .any(|x| x == url_host.as_str()))
+                tracing::info!("Allowed hosts: {:?}", domains);
+                // check domains has any "insecure:allow-all" wildcard
+                if domains.iter().any(|domain| domain == ALLOW_ALL_HOSTS) {
+                    Ok(true)
+                } else {
+                    let allowed: Result<Vec<_>, _> =
+                        domains.iter().map(|d| Url::parse(d)).collect();
+                    let allowed = allowed.map_err(|_| HttpError::InvalidUrl)?;
+
+                    Ok(allowed
+                        .iter()
+                        .map(|u| u.host_str().unwrap())
+                        .any(|x| x == url_host.as_str()))
+                }
             }
             None => Ok(false),
         }
diff --git a/examples/http-rust-oubound-http/.cargo/config.toml b/examples/http-rust-oubound-http/.cargo/config.toml
new file mode 100644
index 000000000..bc255e30b
--- /dev/null
+++ b/examples/http-rust-oubound-http/.cargo/config.toml
@@ -0,0 +1,2 @@
+[build]
+target = "wasm32-wasi"
\ No newline at end of file
diff --git a/examples/http-rust-oubound-http/Cargo.lock b/examples/http-rust-oubound-http/Cargo.lock
new file mode 100644
index 000000000..624475e4e
--- /dev/null
+++ b/examples/http-rust-oubound-http/Cargo.lock
@@ -0,0 +1,358 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "anyhow"
+version = "1.0.57"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "08f9b8508dccb7687a1d6c4ce66b2b0ecef467c94667de27d8d7fe1f8d2a9cdc"
+
+[[package]]
+name = "async-trait"
+version = "0.1.53"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ed6aa3524a2dfcf9fe180c51eae2b58738348d819517ceadf95789c51fff7600"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "bitflags"
+version = "1.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
+
+[[package]]
+name = "bytes"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c4872d67bab6358e59559027aa3b9157c53d9358c51423c17554809a8858e0f8"
+
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
+[[package]]
+name = "fnv"
+version = "1.0.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3f9eec918d3f24069decb9af1554cad7c880e2da24a9afd88aca000531ab82c1"
+
+[[package]]
+name = "heck"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6d621efb26863f0e9924c6ac577e8275e5e6b77455db64ffa6c65c904e9e132c"
+dependencies = [
+ "unicode-segmentation",
+]
+
+[[package]]
+name = "http"
+version = "0.2.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ff8670570af52249509a86f5e3e18a08c60b177071826898fde8997cf5f6bfbb"
+dependencies = [
+ "bytes",
+ "fnv",
+ "itoa",
+]
+
+[[package]]
+name = "http-rust-outbound-http"
+version = "0.1.0"
+dependencies = [
+ "anyhow",
+ "bytes",
+ "http",
+ "spin-sdk",
+ "wit-bindgen-rust",
+]
+
+[[package]]
+name = "id-arena"
+version = "2.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "25a2bc672d1148e28034f176e01fffebb08b35768468cc954630da77a1449005"
+
+[[package]]
+name = "itoa"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1aab8fc367588b89dcee83ab0fd66b72b50b72fa1904d7095045ace2b0c81c35"
+
+[[package]]
+name = "lazy_static"
+version = "1.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
+
+[[package]]
+name = "log"
+version = "0.4.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6389c490849ff5bc16be905ae24bc913a9c8892e19b2341dbc175e14c341c2b8"
+dependencies = [
+ "cfg-if",
+]
+
+[[package]]
+name = "memchr"
+version = "2.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2dffe52ecf27772e601905b7522cb4ef790d2cc203488bbd0e2fe85fcb74566d"
+
+[[package]]
+name = "pin-project-lite"
+version = "0.2.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e0a7ae3ac2f1173085d398531c705756c94a4c56843785df85a60c1a0afac116"
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.37"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ec757218438d5fda206afc041538b2f6d889286160d649a86a24d37e1235afd1"
+dependencies = [
+ "unicode-xid",
+]
+
+[[package]]
+name = "pulldown-cmark"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ffade02495f22453cd593159ea2f59827aae7f53fa8323f756799b670881dcf8"
+dependencies = [
+ "bitflags",
+ "memchr",
+ "unicase",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a1feb54ed693b93a84e14094943b84b7c4eae204c512b7ccb95ab0c66d278ad1"
+dependencies = [
+ "proc-macro2",
+]
+
+[[package]]
+name = "spin-macro"
+version = "0.1.0"
+dependencies = [
+ "anyhow",
+ "bytes",
+ "http",
+ "proc-macro2",
+ "quote",
+ "syn",
+ "wit-bindgen-gen-core",
+ "wit-bindgen-gen-rust-wasm",
+ "wit-bindgen-rust",
+]
+
+[[package]]
+name = "spin-sdk"
+version = "0.1.0"
+dependencies = [
+ "anyhow",
+ "bytes",
+ "http",
+ "spin-macro",
+ "wasi-experimental-http",
+ "wit-bindgen-rust",
+]
+
+[[package]]
+name = "syn"
+version = "1.0.92"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7ff7c592601f11445996a06f8ad0c27f094a58857c2f89e97974ab9235b92c52"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-xid",
+]
+
+[[package]]
+name = "thiserror"
+version = "1.0.31"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bd829fe32373d27f76265620b5309d0340cb8550f523c1dda251d6298069069a"
+dependencies = [
+ "thiserror-impl",
+]
+
+[[package]]
+name = "thiserror-impl"
+version = "1.0.31"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0396bc89e626244658bef819e22d0cc459e795a5ebe878e6ec336d1674a8d79a"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "tinyvec"
+version = "1.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "87cc5ceb3875bb20c2890005a4e226a4651264a5c75edb2421b52861a0a0cb50"
+dependencies = [
+ "tinyvec_macros",
+]
+
+[[package]]
+name = "tinyvec_macros"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cda74da7e1a664f795bb1f8a87ec406fb89a02522cf6e50620d016add6dbbf5c"
+
+[[package]]
+name = "tracing"
+version = "0.1.34"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5d0ecdcb44a79f0fe9844f0c4f33a342cbcbb5117de8001e6ba0dc2351327d09"
+dependencies = [
+ "cfg-if",
+ "log",
+ "pin-project-lite",
+ "tracing-attributes",
+ "tracing-core",
+]
+
+[[package]]
+name = "tracing-attributes"
+version = "0.1.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cc6b8ad3567499f98a1db7a752b07a7c8c7c7c34c332ec00effb2b0027974b7c"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "tracing-core"
+version = "0.1.26"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f54c8ca710e81886d498c2fd3331b56c93aa248d49de2222ad2742247c60072f"
+dependencies = [
+ "lazy_static",
+]
+
+[[package]]
+name = "unicase"
+version = "2.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "50f37be617794602aabbeee0be4f259dc1778fabe05e2d67ee8f79326d5cb4f6"
+dependencies = [
+ "version_check",
+]
+
+[[package]]
+name = "unicode-normalization"
+version = "0.1.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d54590932941a9e9266f0832deed84ebe1bf2e4c9e4a3554d393d18f5e854bf9"
+dependencies = [
+ "tinyvec",
+]
+
+[[package]]
+name = "unicode-segmentation"
+version = "1.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7e8820f5d777f6224dc4be3632222971ac30164d4a258d595640799554ebfd99"
+
+[[package]]
+name = "unicode-xid"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8ccb82d61f80a663efe1f787a51b16b5a51e3314d6ac365b08639f52387b33f3"
+
+[[package]]
+name = "version_check"
+version = "0.9.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
+
+[[package]]
+name = "wasi-experimental-http"
+version = "0.9.0"
+source = "git+https://github.com/deislabs/wasi-experimental-http?rev=a82ae3d6c85c4251b3663035febeb8100068f51d#a82ae3d6c85c4251b3663035febeb8100068f51d"
+dependencies = [
+ "anyhow",
+ "bytes",
+ "http",
+ "thiserror",
+ "tracing",
+]
+
+[[package]]
+name = "wit-bindgen-gen-core"
+version = "0.1.0"
+source = "git+https://github.com/bytecodealliance/wit-bindgen?rev=2f46ce4cc072107153da0cefe15bdc69aa5b84d0#2f46ce4cc072107153da0cefe15bdc69aa5b84d0"
+dependencies = [
+ "anyhow",
+ "wit-parser",
+]
+
+[[package]]
+name = "wit-bindgen-gen-rust"
+version = "0.1.0"
+source = "git+https://github.com/bytecodealliance/wit-bindgen?rev=2f46ce4cc072107153da0cefe15bdc69aa5b84d0#2f46ce4cc072107153da0cefe15bdc69aa5b84d0"
+dependencies = [
+ "heck",
+ "wit-bindgen-gen-core",
+]
+
+[[package]]
+name = "wit-bindgen-gen-rust-wasm"
+version = "0.1.0"
+source = "git+https://github.com/bytecodealliance/wit-bindgen?rev=2f46ce4cc072107153da0cefe15bdc69aa5b84d0#2f46ce4cc072107153da0cefe15bdc69aa5b84d0"
+dependencies = [
+ "heck",
+ "wit-bindgen-gen-core",
+ "wit-bindgen-gen-rust",
+]
+
+[[package]]
+name = "wit-bindgen-rust"
+version = "0.1.0"
+source = "git+https://github.com/bytecodealliance/wit-bindgen?rev=2f46ce4cc072107153da0cefe15bdc69aa5b84d0#2f46ce4cc072107153da0cefe15bdc69aa5b84d0"
+dependencies = [
+ "async-trait",
+ "bitflags",
+ "wit-bindgen-rust-impl",
+]
+
+[[package]]
+name = "wit-bindgen-rust-impl"
+version = "0.1.0"
+source = "git+https://github.com/bytecodealliance/wit-bindgen?rev=2f46ce4cc072107153da0cefe15bdc69aa5b84d0#2f46ce4cc072107153da0cefe15bdc69aa5b84d0"
+dependencies = [
+ "proc-macro2",
+ "syn",
+ "wit-bindgen-gen-core",
+ "wit-bindgen-gen-rust-wasm",
+]
+
+[[package]]
+name = "wit-parser"
+version = "0.1.0"
+source = "git+https://github.com/bytecodealliance/wit-bindgen?rev=2f46ce4cc072107153da0cefe15bdc69aa5b84d0#2f46ce4cc072107153da0cefe15bdc69aa5b84d0"
+dependencies = [
+ "anyhow",
+ "id-arena",
+ "pulldown-cmark",
+ "unicode-normalization",
+ "unicode-xid",
+]
diff --git a/examples/http-rust-oubound-http/Cargo.toml b/examples/http-rust-oubound-http/Cargo.toml
new file mode 100644
index 000000000..860c58041
--- /dev/null
+++ b/examples/http-rust-oubound-http/Cargo.toml
@@ -0,0 +1,21 @@
+[package]
+name = "http-rust-outbound-http"
+version = "0.1.0"
+edition = "2021"
+
+[lib]
+crate-type = [ "cdylib" ]
+
+[dependencies]
+# Useful crate to handle errors.
+anyhow = "1"
+# Crate to simplify working with bytes.
+bytes = "1"
+# General-purpose crate with common HTTP types.
+http = "0.2"
+# The Spin SDK.
+spin-sdk = { path = "../../sdk/rust", version = "0.1.0" }
+# Crate that generates Rust Wasm bindings from a WebAssembly interface.
+wit-bindgen-rust = { git = "https://github.com/bytecodealliance/wit-bindgen", rev = "2f46ce4cc072107153da0cefe15bdc69aa5b84d0" }
+
+[workspace]
\ No newline at end of file
diff --git a/examples/http-rust-oubound-http/spin.toml b/examples/http-rust-oubound-http/spin.toml
new file mode 100644
index 000000000..ceb8c7907
--- /dev/null
+++ b/examples/http-rust-oubound-http/spin.toml
@@ -0,0 +1,24 @@
+spin_version = "1"
+authors = ["Fermyon Engineering <engineering@fermyon.com>"]
+description = "A simple application that makes an outbound http call."
+name = "spin-outbound-http"
+trigger = { type = "http", base = "/" }
+version = "1.0.0"
+
+[[component]]
+id = "rust-outbound-http"
+source = "target/wasm32-wasi/release/http_rust_outbound_http.wasm"
+allowed_http_hosts = ["https://some-random-api.ml"]
+[component.trigger]
+route = "/outbound"
+[component.build]
+command = "cargo build --target wasm32-wasi --release"
+
+[[component]]
+id = "rust-outbound-http-wildcard"
+source = "target/wasm32-wasi/release/http_rust_outbound_http.wasm"
+allowed_http_hosts = ["insecure:allow-all"]
+[component.trigger]
+route = "/wildcard"
+[component.build]
+command = "cargo build --target wasm32-wasi --release"
diff --git a/examples/http-rust-oubound-http/src/lib.rs b/examples/http-rust-oubound-http/src/lib.rs
new file mode 100644
index 000000000..b245e2c70
--- /dev/null
+++ b/examples/http-rust-oubound-http/src/lib.rs
@@ -0,0 +1,20 @@
+use anyhow::Result;
+use spin_sdk::{
+    http::{Request, Response},
+    http_component,
+};
+
+/// Send an HTTP request and return the response.
+#[http_component]
+fn send_outbound(_req: Request) -> Result<Response> {
+    let mut res = spin_sdk::outbound_http::send_request(
+        http::Request::builder()
+            .method("GET")
+            .uri("https://some-random-api.ml/facts/dog")
+            .body(None)?,
+    )?;
+    res.headers_mut()
+        .insert("spin-component", "rust-outbound-http".try_into()?);
+    println!("{:?}", res);
+    Ok(res)
+}
\ No newline at end of file