diff --git a/README.md b/README.md
index 4261343..dfa6984 100644
--- a/README.md
+++ b/README.md
@@ -9,5 +9,12 @@ subbeat grafana http://localhost:3000 eyJrIjoiWnRRMTNmcGpvTHNPb3UzNzdUNUphRm53Rk
 
 
 ### Datasources
+
+#### Prometheus
+
+```
+subbeat prometheus http://localhost:9090/ "rate(go_memstats_alloc_bytes_total[5m])" 1634172070 1635110190 15
+```
+
 #### Grafana
 * Prometheus
diff --git a/src/datasources.rs b/src/datasources.rs
index c2caf0b..f115b38 100644
--- a/src/datasources.rs
+++ b/src/datasources.rs
@@ -6,7 +6,7 @@ use crate::{
 pub mod grafana;
 pub mod prometheus;
 
-pub fn resolve(query_config: &QueryConfig) -> Box<dyn Metric> {
+pub fn resolve(query_config: &QueryConfig) -> Box<dyn Metric + Sync> {
     if query_config.datasource_type == DatasourceType::Grafana {
         let gs = grafana::Grafana::new(
             query_config.url.to_string(),
diff --git a/src/datasources/prometheus.rs b/src/datasources/prometheus.rs
index b3ee628..fee38cf 100644
--- a/src/datasources/prometheus.rs
+++ b/src/datasources/prometheus.rs
@@ -1,11 +1,15 @@
 use async_trait::async_trait;
 use hyper::{Body, Client, Method, Request, StatusCode};
 
+use serde_derive::{Deserialize, Serialize};
+
 use crate::{
     metric::{Metric, MetricResult},
     types,
 };
 
+use serde_qs as qs;
+
 use bytes::Buf as _;
 
 pub struct Prometheus {
@@ -13,6 +17,14 @@ pub struct Prometheus {
     query: String,
 }
 
+#[derive(Deserialize, Serialize)]
+struct Query {
+    query: String,
+    start: u64,
+    end: u64,
+    step: u64,
+}
+
 impl Prometheus {
     pub fn new(url: &String, query: &String) -> Prometheus {
         Prometheus {
@@ -44,6 +56,15 @@ impl Prometheus {
 #[async_trait]
 impl Metric for Prometheus {
     async fn query_chunk(&self, from: u64, to: u64, step: u64) -> types::Result<MetricResult> {
+        let q = Query {
+            query: self.query.to_owned(),
+            start: from,
+            end: to,
+            step,
+        };
+        let qs = qs::to_string(&q)?;
+
+        println!("prom str: {}", qs);
         // TODO: query
         // TODO: parse
         return Ok(Default::default());
diff --git a/src/main.rs b/src/main.rs
index 622c18d..8a7c3ad 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,4 +1,7 @@
-use subbeat::{datasources::grafana, metric::Metric};
+use subbeat::{
+    datasources::{grafana, resolve},
+    metric::Metric,
+};
 
 mod cli;
 mod types;
@@ -7,14 +10,9 @@ mod types;
 async fn main() -> types::Result<()> {
     let cli = cli::CLI::new();
 
-    let gs = grafana::Grafana::new(
-        cli.query_config.url.to_string(),
-        cli.query_config.key.to_string(),
-        cli.query_config.datasource_url.to_string(),
-        cli.query_config.query.to_string(),
-    );
+    let ds = resolve(&cli.query_config);
 
-    let r = gs
+    let r = ds
         .query(
             cli.query_config.from,
             cli.query_config.to,