diff --git a/Cargo.lock b/Cargo.lock
index 8c0ce985..545f2e19 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2576,6 +2576,20 @@ dependencies = [
  "memchr",
 ]
 
+[[package]]
+name = "review_sdk"
+version = "0.1.0"
+dependencies = [
+ "clap",
+ "hipcheck-sdk",
+ "log",
+ "schemars",
+ "serde",
+ "serde_json",
+ "tokio",
+ "url",
+]
+
 [[package]]
 name = "ring"
 version = "0.17.8"
diff --git a/Cargo.toml b/Cargo.toml
index 213b4b39..4cc6aed3 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -29,6 +29,7 @@ members = [
     "plugins/fuzz",
     "plugins/entropy",
     "plugins/linguist",
+    "plugins/review"
 ]
 
 # Make sure Hipcheck is run with `cargo run`.
diff --git a/plugins/github_api/plugin.kdl b/plugins/github_api/plugin.kdl
new file mode 100644
index 00000000..59879c62
--- /dev/null
+++ b/plugins/github_api/plugin.kdl
@@ -0,0 +1,10 @@
+publisher "mitre"
+name "github_api"
+version "0.1.0"
+license "Apache-2.0"
+entrypoint {
+  on arch="aarch64-apple-darwin" "./hc-mitre-github_api"
+  on arch="x86_64-apple-darwin" "./hc-mitre-github_api"
+  on arch="x86_64-unknown-linux-gnu" "./hc-mitre-github_api"
+  on arch="x86_64-pc-windows-msvc" "./hc-mitre-github_api"
+}
\ No newline at end of file
diff --git a/plugins/review/Cargo.toml b/plugins/review/Cargo.toml
new file mode 100644
index 00000000..9b0b2136
--- /dev/null
+++ b/plugins/review/Cargo.toml
@@ -0,0 +1,19 @@
+[package]
+name = "review_sdk"
+version = "0.1.0"
+license = "Apache-2.0"
+edition = "2021"
+publish = false
+
+[dependencies]
+clap = { version = "4.5.18", features = ["derive"] }
+hipcheck-sdk = { path = "../../sdk/rust", features = ["macros"] }
+log = "0.4.22"
+schemars = { version = "0.8.21", features = ["url"] }
+serde = { version = "1.0.210", features = ["derive", "rc"] }
+serde_json = "1.0.128"
+tokio = { version = "1.40.0", features = ["rt"] }
+url = "2.5.2"
+
+[dev-dependencies]
+hipcheck-sdk = { path = "../../sdk/rust", features = ["mock_engine"] }
diff --git a/plugins/review/plugin.kdl b/plugins/review/plugin.kdl
new file mode 100644
index 00000000..83f03557
--- /dev/null
+++ b/plugins/review/plugin.kdl
@@ -0,0 +1,14 @@
+publisher "mitre"
+name "review"
+version "0.1.0"
+license "Apache-2.0"
+entrypoint {
+  on arch="aarch64-apple-darwin" "./hc-mitre-review"
+  on arch="x86_64-apple-darwin" "./hc-mitre-review"
+  on arch="x86_64-unknown-linux-gnu" "./hc-mitre-review"
+  on arch="x86_64-pc-windows-msvc" "./hc-mitre-review"
+}
+
+dependencies {
+  plugin "mitre/github_api" version="0.1.0" manifest="./plugins/github_api/plugin.kdl"
+}
\ No newline at end of file
diff --git a/plugins/review/src/main.rs b/plugins/review/src/main.rs
new file mode 100644
index 00000000..0d6e4963
--- /dev/null
+++ b/plugins/review/src/main.rs
@@ -0,0 +1,193 @@
+// SPDX-License-Identifier: Apache-2.0
+
+//! Plugin for querying what percentage of pull requests were merged without review
+
+use clap::Parser;
+use hipcheck_sdk::{prelude::*, types::Target};
+use schemars::JsonSchema;
+use serde::{Deserialize, Serialize};
+use std::{result::Result as StdResult, sync::OnceLock};
+
+#[derive(Deserialize)]
+struct Config {
+	percent_threshold: Option<f64>,
+}
+
+static CONFIG: OnceLock<Config> = OnceLock::new();
+
+#[derive(Debug, Clone, Copy, Serialize, Deserialize, JsonSchema, PartialEq, Eq)]
+pub struct PullRequest {
+	pub id: u64,
+	pub reviews: u64,
+}
+
+#[derive(Debug, Clone, Eq, PartialEq)]
+pub struct PullReview {
+	pub pull_request: PullRequest,
+	pub has_review: bool,
+}
+
+/// Returns the percentage of commits to the repo that were merged without review
+#[query]
+async fn review(engine: &mut PluginEngine, value: Target) -> Result<f64> {
+	log::debug!("running review metric");
+
+	// Confirm that the target is a GitHub repo
+	let Some(remote) = value.remote else {
+		log::error!("target repository does not have a remote repository URL");
+		return Err(Error::UnexpectedPluginQueryInputFormat);
+	};
+	let Some(known_remote) = remote.known_remote else {
+		log::error!("target repository is not a GitHub repository or else is missing GitHub repo information");
+		return Err(Error::UnexpectedPluginQueryInputFormat);
+	};
+
+	// Get a list of all pull requests to the repo, with their corresponding number of reviews
+	let value = engine
+		.query("mitre/github_api/pr_reviews", known_remote)
+		.await
+		.map_err(|e| {
+			log::error!(
+				"failed to get pull request reviews from GitHub for review query: {}",
+				e
+			);
+			Error::UnspecifiedQueryState
+		})?;
+
+	let pull_requests: Vec<PullRequest> =
+		serde_json::from_value(value).map_err(Error::InvalidJsonInQueryOutput)?;
+
+	log::trace!("got pull requests [requests='{:#?}']", pull_requests);
+
+	// Create a Vec big enough to hold every single pull request
+	let mut pull_reviews = Vec::with_capacity(pull_requests.len());
+
+	// Create a list of pull requesets, with a boolean indicating if they have at least one review or not
+	for pull_request in pull_requests {
+		let has_review = pull_request.reviews > 0;
+		pull_reviews.push(PullReview {
+			pull_request,
+			has_review,
+		});
+	}
+
+	// Calculate the percentage of unreviewed pull requests out of the total
+	// If there are no pull requests, return 0.0 to avoid a divide-by-zero error
+	let num_flagged = pull_reviews.iter().filter(|p| !p.has_review).count() as u64;
+	let percent_flagged = match (num_flagged, pull_reviews.len()) {
+		(flagged, total) if flagged != 0 && total != 0 => {
+			num_flagged as f64 / pull_reviews.len() as f64
+		}
+		_ => 0.0,
+	};
+
+	log::info!("completed review query");
+
+	Ok(percent_flagged)
+}
+
+#[derive(Clone, Debug)]
+struct ReviewPlugin;
+
+impl Plugin for ReviewPlugin {
+	const PUBLISHER: &'static str = "mitre";
+
+	const NAME: &'static str = "review";
+
+	fn set_config(&self, config: Value) -> StdResult<(), ConfigError> {
+		let conf =
+			serde_json::from_value::<Config>(config).map_err(|e| ConfigError::Unspecified {
+				message: e.to_string(),
+			})?;
+		CONFIG.set(conf).map_err(|_e| ConfigError::Unspecified {
+			message: "config was already set".to_owned(),
+		})
+	}
+
+	fn default_policy_expr(&self) -> Result<String> {
+		let Some(conf) = CONFIG.get() else {
+			log::error!("tried to access config before set by Hipcheck core!");
+			return Err(Error::UnspecifiedQueryState);
+		};
+		match conf.percent_threshold {
+			Some(threshold) => Ok(format!("lte $ {}", threshold)),
+			None => Ok("".to_owned()),
+		}
+	}
+
+	fn explain_default_query(&self) -> Result<Option<String>> {
+		Ok(Some(
+			"Percentage of unreviewed commits to the repo".to_string(),
+		))
+	}
+
+	queries! {}
+}
+
+#[derive(Parser, Debug)]
+struct Args {
+	#[arg(long)]
+	port: u16,
+}
+
+#[tokio::main(flavor = "current_thread")]
+async fn main() -> Result<()> {
+	let args = Args::try_parse().unwrap();
+	PluginServer::register(ReviewPlugin {})
+		.listen(args.port)
+		.await
+}
+
+#[cfg(test)]
+mod test {
+	use super::*;
+
+	use hipcheck_sdk::types::{KnownRemote, LocalGitRepo, RemoteGitRepo};
+	use std::result::Result as StdResult;
+	use url::Url;
+
+	fn known_remote() -> KnownRemote {
+		KnownRemote::GitHub {
+			owner: "expresjs".to_string(),
+			repo: "express".to_string(),
+		}
+	}
+
+	fn mock_responses() -> StdResult<MockResponses, Error> {
+		let known_remote = known_remote();
+
+		let pr1 = PullRequest { id: 1, reviews: 1 };
+		let pr2 = PullRequest { id: 2, reviews: 3 };
+		let pr3 = PullRequest { id: 3, reviews: 0 };
+		let pr4 = PullRequest { id: 4, reviews: 1 };
+		let prs = vec![pr1, pr2, pr3, pr4];
+
+		// when calling into query, the input known_remote gets passed to `pr_reviews`, lets assume it returns the vec of PullRequests `prs`
+		let mut mock_responses = MockResponses::new();
+		mock_responses.insert("mitre/github_api/pr_reviews", known_remote, Ok(prs))?;
+		Ok(mock_responses)
+	}
+
+	#[tokio::test]
+	async fn test_activity() {
+		let target = Target {
+			specifier: "express".to_string(),
+			local: LocalGitRepo {
+				path: "/home/users/me/.cache/hipcheck/clones/github/expressjs/express/".to_string(),
+				git_ref: "main".to_string(),
+			},
+			remote: Some(RemoteGitRepo {
+				url: Url::parse("https://github.com/expressjs/express.git").unwrap(),
+				known_remote: Some(known_remote()),
+			}),
+			package: None,
+		};
+
+		let mut engine = PluginEngine::mock(mock_responses().unwrap());
+		let result = review(&mut engine, target).await.unwrap();
+
+		let expected = 0.25;
+
+		assert_eq!(result, expected);
+	}
+}