# 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 2026-09-15).

Extends the duration of an existing Browserbase headless browser session by adding more prepaid time

## Facts

- Endpoint: POST https://x402.browserbase.com/browser/session/test-session-4471/extend
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/browserbase-session-extend-6869fda8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6whDVfm3mrk9tapghBHQO

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-6869fda8 -d '<json body>'
```

Example prompt: My Browserbase session test-session-4471 is about to run out of time — can you extend it so it stays alive for a bit longer?

## When to prefer this

Use this endpoint when you have an existing active Browserbase session that needs more runtime before it expires, rather than creating a brand new session. This avoids losing browser state, cookies, and navigation history that would be reset on a fresh session. Prefer this over creating a new session when you are mid-task and need continuity.

## Known failure modes

- Session ID not found or already expired — session cannot be extended after it has closed
- Insufficient payment or USDC balance to cover the extension cost
- Invalid session ID format in the URL path
- Session extension rejected due to platform limits on maximum session duration
- Payment processing failure via x402 protocol

## How this service works

Extend an existing Browserbase session by adding more prepaid time

## Output

A confirmation that the existing Browserbase session has been extended with additional prepaid time, along with updated session metadata such as the new expiry time or remaining duration.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/browserbase-session-extend-6869fda8/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)