# Browserbase Session Extend

> Browserbase Session Extend is a paid API for AI agents from x402.browserbase.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Adds more prepaid time to an existing Browserbase headless browser session identified by session ID

## Facts

- Endpoint: POST https://x402.browserbase.com/browser/session/sess_7f3a9c2e1b4d/extend
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/browserbase-session-extend-05d37c1a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_gizQb3mA1ashSxxV_Al3d

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability browserbase-session-extend-05d37c1a -d '<json body>'
```

Example prompt: My Browserbase session sess_7f3a9c2e1b4d is about to run out of time — can you extend it by adding more prepaid time so the automation keeps running?

## When to prefer this

Use this endpoint when you have an active Browserbase session that is approaching its prepaid time limit and you need to continue using it without interruption. This is the correct endpoint when you already have a valid session ID (not when you need to create a new session). Prefer this over creating a new session when you want to preserve existing browser state, cookies, and page context.

## Known failure modes

- Session ID not found or already expired — returns 404 or session-not-found error
- Insufficient payment or payment failure — returns 402 Payment Required
- Session has already been terminated — cannot extend a closed session
- Invalid session ID format — returns 400 Bad Request
- Network timeout reaching the browser infrastructure — returns 5xx error

## How this service works

Extend an existing Browserbase session by adding more prepaid time

## Output

Returns confirmation that the session has been extended with additional prepaid time, including the updated session expiry or remaining duration details for the specified session ID.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/browserbase-session-extend-05d37c1a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.browserbase.com](https://www.zero.xyz/host/x402.browserbase.com/llms.txt)