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Extend session timeout

POSThttps://api.vercel.com/v2/sandboxes/sessions/{sessionId}/extend-timeout
Extends the maximum execution time of a running session. The session must be active and able to accept commands. The total timeout cannot exceed the maximum allowed limit for your account.
Request
import { Vercel } from "@vercel/sdk";


const vercel = new Vercel({
  bearerToken: "<YOUR_BEARER_TOKEN_HERE>",
});


async function run() {
  const result = await vercel.sandboxes.extendSessionTimeout({
    sessionId: "sbx_abc123",
    teamId: "team_1a2b3c4d5e6f7g8h9i0j1k2l",
    slug: "my-team-url-slug",
    requestBody: {
      duration: 300000,
    },
  });


  console.log(result);
}


run();
Response
{
  "session": {
    "abortedAt": "1750344501629",
    "activeCpuDurationMs": "42",
    "architecture": "amd64",
    "createdAt": "1750344501629",
    "cwd": "/vercel/sandbox",
    "duration": "3600000",
    "id": "sbx_123a6c5209bc3778245d011443644c8d27dc2c50",
    "memory": "2048",
    "networkPolicy": {
      "allowedCIDRs": [],
      "allowedDomains": [],
      "deniedCIDRs": [],
      "injectionRules": [
        {
          "domain": "api.vercel.com",
          "headerNames": []
        }
      ],
      "mode": "custom"
    },
    "networkTransfer": {
      "egress": "123",
      "ingress": "123"
    },
    "projectId": "prj_123a6c5209bc3778245d011443644c8d27dc2c50",
    "region": "iad1",
    "requestedAt": "1750344501629",
    "requestedStopAt": "1750344501629",
    "runtime": "node22",
    "snapshottedAt": "1750344501629",
    "sourceSandboxName": "my-sandbox",
    "sourceSnapshotId": "snap_123a6c5209bc3778245d011443644c8d27dc2c50",
    "startedAt": "1750344501629",
    "status": "running",
    "stoppedAt": "1750344501629",
    "timeout": "3600000",
    "updatedAt": "1750344501629",
    "v0": "false",
    "vcpus": "2"
  }
}

Authentication

AuthorizationbearerToken

Default authentication mechanism

Path parameters

sessionIdstringRequired
The unique identifier of the session to extend the timeout for.

Query parameters

teamIdstringOptional
The Team identifier to perform the request on behalf of.
slugstringOptional
The Team slug to perform the request on behalf of.

Body

application/json
durationnumberRequired
The amount of time in milliseconds to add to the current timeout. Must be at least 1000ms (1 second).

Response

200The session timeout was extended successfully.
sessionobjectRequired
This object contains information related to a Vercel Sandbox Session. v2 endpoints return "session" instead of "sandbox" as the response wrapper key.

Errors

400One of the provided values in the request body is invalid. One of the provided values in the request query is invalid.
401The request is not authorized.
403You do not have permission to access this resource.
404Error
410Error
422Error
429Error
500Error