# 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).

Extends an existing Browserbase browser session by adding more prepaid time to prevent it from expiring

## Facts

- Endpoint: POST https://x402.browserbase.com/browser/session/:id/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-8c770da3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_55nVP_hv4fSkcWH89AsVn

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-8c770da3 -d '<json body>'
```

Example prompt: My Browserbase session abc123 is about to expire — add another 10 minutes of prepaid time to keep it alive.

## 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 only way to extend an existing session's duration rather than creating a new one and losing the current browser state, cookies, and navigation context.

## Known failure modes

- Session ID not found or already expired — 404 error
- Insufficient payment or payment processing failure — 402 error
- Session has already reached maximum allowed duration
- Invalid session ID format in path parameter
- Session already terminated by user or system

## How this service works

Extend an existing Browserbase session by adding more prepaid time

## Output

Returns confirmation that the session has been extended with updated expiry time and remaining prepaid duration for the specified session ID.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/browserbase-session-extend-8c770da3/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)