diff --git a/netlify.toml b/netlify.toml
index 8ac8f48..0d05dd0 100644
--- a/netlify.toml
+++ b/netlify.toml
@@ -53,6 +53,11 @@
   to = "/.netlify/functions/snapshots?key=:key"
   status = 200
 
+[[redirects]]
+  from = "/api/mcp-context"
+  to = "/.netlify/functions/mcp-context"
+  status = 200
+
 # Swagger UI
 [[redirects]]
   from = "/docs"
diff --git a/netlify/functions/helpers.js b/netlify/functions/helpers.js
index c5d50a1..641922a 100644
--- a/netlify/functions/helpers.js
+++ b/netlify/functions/helpers.js
@@ -58,4 +58,14 @@ async function getLatestSnapshot() {
   return { key: latestKey, data };
 }
 
-module.exports = { STORE_NAME, json, error, options, getLatestSnapshot, listBlobs, getBlob };
+async function putBlob(store, key, value, contentType = "application/json") {
+  const body = contentType === "application/json" ? JSON.stringify(value) : value;
+  const resp = await fetch(blobUrl(store, key), {
+    method: "PUT",
+    headers: { ...blobHeaders(), "Content-Type": contentType },
+    body,
+  });
+  if (!resp.ok) throw new Error(`Put blob failed: ${resp.status}`);
+}
+
+module.exports = { STORE_NAME, json, error, options, getLatestSnapshot, listBlobs, getBlob, putBlob, blobUrl, blobHeaders, BLOB_SITE_ID };
diff --git a/netlify/functions/mcp-context.js b/netlify/functions/mcp-context.js
new file mode 100644
index 0000000..037f8f7
--- /dev/null
+++ b/netlify/functions/mcp-context.js
@@ -0,0 +1,49 @@
+const { json, error, options, listBlobs, blobUrl, blobHeaders } = require("./helpers");
+
+const ONCALL_STORE = "oncall";
+
+exports.handler = async (event) => {
+  if (event.httpMethod === "OPTIONS") return options();
+
+  try {
+    const service = event.queryStringParameters?.service;
+
+    if (!service) {
+      const blobs = await listBlobs(ONCALL_STORE);
+      const entries = blobs.map((b) => {
+        const parts = b.key.split("/");
+        return { key: b.key, service: parts[0], timestamp: parts.slice(1).join("/") };
+      });
+      return json({ count: entries.length, entries });
+    }
+
+    const blobs = await listBlobs(ONCALL_STORE);
+    const serviceBlobs = blobs.filter((b) => b.key.startsWith(`${service}/`));
+
+    if (!serviceBlobs.length) {
+      return error(`No oncall logs found for service: ${service}`, 404);
+    }
+
+    const keys = serviceBlobs.map((b) => b.key).sort();
+    const latestKey = keys[keys.length - 1];
+
+    const resp = await fetch(blobUrl(ONCALL_STORE, latestKey), {
+      headers: blobHeaders(),
+    });
+    if (!resp.ok) return error(`Failed to fetch oncall log: ${resp.status}`, 500);
+
+    const ct = resp.headers.get("content-type") || "";
+    const content = ct.includes("application/json")
+      ? await resp.json()
+      : await resp.text();
+
+    return json({
+      service,
+      key: latestKey,
+      available_logs: keys,
+      latest_log: content,
+    });
+  } catch (e) {
+    return error(`Failed to fetch oncall context: ${e.message}`);
+  }
+};
diff --git a/public/swagger/openapi.yaml b/public/swagger/openapi.yaml
index b803bd1..028761e 100644
--- a/public/swagger/openapi.yaml
+++ b/public/swagger/openapi.yaml
@@ -147,6 +147,36 @@ paths:
               schema:
                 $ref: "#/components/schemas/Error"
 
+  /mcp-context:
+    get:
+      summary: Oncall service context
+      description: |
+        Returns oncall chat logs for a given service. Without a service parameter,
+        lists all available oncall entries. With a service name, returns the latest
+        log and all available timestamps.
+      operationId: getMcpContext
+      tags: [Oncall]
+      parameters:
+        - name: service
+          in: query
+          required: false
+          description: "Service name (e.g. allocation-engine-2.0)"
+          schema:
+            type: string
+      responses:
+        "200":
+          description: Oncall context logs
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/McpContextResponse"
+        "404":
+          description: No oncall logs found for service
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/Error"
+
 components:
   schemas:
     Error:
@@ -433,6 +463,38 @@ components:
             type: string
           description: Snapshot keys (most recent 50), newest first
 
+    McpContextResponse:
+      type: object
+      properties:
+        service:
+          type: string
+          example: allocation-engine-2.0
+        key:
+          type: string
+          description: Blob key for the latest oncall log
+        available_logs:
+          type: array
+          items:
+            type: string
+          description: All available log keys for this service
+        latest_log:
+          description: Content of the latest oncall chat log (text or JSON)
+        count:
+          type: integer
+          description: Total number of oncall entries (when listing all)
+        entries:
+          type: array
+          items:
+            type: object
+            properties:
+              key:
+                type: string
+              service:
+                type: string
+              timestamp:
+                type: string
+          description: All oncall entries across services (when listing all)
+
     SnapshotResponse:
       type: object
       properties: