diff --git a/src/app/api/common/impactMetrics/getImpactMetrics.ts b/src/app/api/common/impactMetrics/getImpactMetrics.ts
new file mode 100644
index 000000000..a9d07bdcc
--- /dev/null
+++ b/src/app/api/common/impactMetrics/getImpactMetrics.ts
@@ -0,0 +1,57 @@
+import { cache } from "react";
+
+async function getImpactMetricsApi(
+  roundId: string,
+  ballotCasterAddressOrEns?: string
+) {
+  const defaultPageMetadata = {
+    hasNext: false,
+    totalReturned: 1,
+    nextOffset: 0,
+  };
+  const defaultComments = [
+    {
+      id: "1",
+      content: "Comment 1",
+      commenter: "0x1234",
+      createdAt: "2021-10-01T00:00:00Z",
+      editedAt: "2021-10-01T00:00:00Z",
+    },
+  ];
+  const defaultImpactMetrics = [
+    {
+      id: "1",
+      name: "Impact Metric 1",
+      description: "Description of Impact Metric 1",
+      externalLink: "https://www.opensource.observer/",
+      comments: defaultComments,
+    },
+  ];
+  return {
+    metadata: defaultPageMetadata,
+    impactMetrics: defaultImpactMetrics,
+  };
+}
+
+async function getImpactMetricApi(impactMetricId: string) {
+  const defaultComments = [
+    {
+      id: "1",
+      content: "Comment 1",
+      commenter: "0x1234",
+      createdAt: "2021-10-01T00:00:00Z",
+      editedAt: "2021-10-01T00:00:00Z",
+    },
+  ];
+  const defaultImpactMetric = {
+    id: impactMetricId,
+    name: `Impact Metric ${impactMetricId}`,
+    description: `Description of Impact Metric ${impactMetricId}`,
+    externalLink: "https://www.opensource.observer/",
+    comments: defaultComments,
+  };
+  return defaultImpactMetric;
+}
+
+export const fetchImpactMetricsApi = cache(getImpactMetricsApi);
+export const fetchImpactMetricApi = cache(getImpactMetricApi);
diff --git a/src/app/api/v1/retrofunding/rounds/[roundId]/ballots/[ballotCasterAddressOrEns]/impactMetrics/[impactMetricId]/route.ts b/src/app/api/v1/retrofunding/rounds/[roundId]/ballots/[ballotCasterAddressOrEns]/impactMetrics/[impactMetricId]/route.ts
new file mode 100644
index 000000000..ef18706d9
--- /dev/null
+++ b/src/app/api/v1/retrofunding/rounds/[roundId]/ballots/[ballotCasterAddressOrEns]/impactMetrics/[impactMetricId]/route.ts
@@ -0,0 +1,15 @@
+export async function DELETE(
+  request: Request,
+  route: {
+    params: {
+      roundId: string;
+      ballotCasterAddressOrEns: string;
+      impactMetricId: string;
+    };
+  }
+) {
+  const { roundId, ballotCasterAddressOrEns, impactMetricId } = route.params;
+  return new Response(null, {
+    status: 200,
+  });
+}
diff --git a/src/app/api/v1/retrofunding/rounds/[roundId]/ballots/[ballotCasterAddressOrEns]/impactMetrics/route.ts b/src/app/api/v1/retrofunding/rounds/[roundId]/ballots/[ballotCasterAddressOrEns]/impactMetrics/route.ts
new file mode 100644
index 000000000..da9f07903
--- /dev/null
+++ b/src/app/api/v1/retrofunding/rounds/[roundId]/ballots/[ballotCasterAddressOrEns]/impactMetrics/route.ts
@@ -0,0 +1,29 @@
+import { fetchImpactMetricsApi } from "@/app/api/common/impactMetrics/getImpactMetrics";
+
+export async function GET(
+  request: Request,
+  route: { params: { roundId: string; ballotCasterAddressOrEns: string } }
+) {
+  const { roundId, ballotCasterAddressOrEns } = route.params;
+  const impactMetrics = await fetchImpactMetricsApi(
+    roundId,
+    ballotCasterAddressOrEns
+  );
+  return new Response(JSON.stringify(impactMetrics), {
+    status: 200,
+  });
+}
+
+export async function POST(
+  request: Request,
+  route: { params: { roundId: string; ballotCasterAddressOrEns: string } }
+) {
+  const { roundId, ballotCasterAddressOrEns } = route.params;
+  const impactMetrics = await fetchImpactMetricsApi(
+    roundId,
+    ballotCasterAddressOrEns
+  );
+  return new Response(JSON.stringify(impactMetrics), {
+    status: 200,
+  });
+}
diff --git a/src/app/api/v1/retrofunding/rounds/[roundId]/impactMetrics/[impactMetricId]/route.ts b/src/app/api/v1/retrofunding/rounds/[roundId]/impactMetrics/[impactMetricId]/route.ts
new file mode 100644
index 000000000..795503cef
--- /dev/null
+++ b/src/app/api/v1/retrofunding/rounds/[roundId]/impactMetrics/[impactMetricId]/route.ts
@@ -0,0 +1,18 @@
+import { fetchImpactMetricApi } from "@/app/api/common/impactMetrics/getImpactMetrics";
+
+export async function GET(
+  request: Request,
+  route: {
+    params: {
+      roundId: string;
+      ballotCasterAddressOrEns: string;
+      impactMetricId: string;
+    };
+  }
+) {
+  const { roundId, ballotCasterAddressOrEns, impactMetricId } = route.params;
+  const impactMetrics = await fetchImpactMetricApi(impactMetricId);
+  return new Response(JSON.stringify(impactMetrics), {
+    status: 200,
+  });
+}
diff --git a/src/app/api/v1/retrofunding/rounds/[roundId]/impactMetrics/route.ts b/src/app/api/v1/retrofunding/rounds/[roundId]/impactMetrics/route.ts
new file mode 100644
index 000000000..5c17a77d2
--- /dev/null
+++ b/src/app/api/v1/retrofunding/rounds/[roundId]/impactMetrics/route.ts
@@ -0,0 +1,12 @@
+import { fetchImpactMetricsApi } from "@/app/api/common/impactMetrics/getImpactMetrics";
+
+export async function GET(
+  request: Request,
+  route: { params: { roundId: string } }
+) {
+  const { roundId } = route.params;
+  const impactMetrics = await fetchImpactMetricsApi(roundId);
+  return new Response(JSON.stringify(impactMetrics), {
+    status: 200,
+  });
+}