# Anchor Browser Session Creation

> Anchor Browser Session Creation is a paid API for AI agents from api.anchorbrowser.io, paid per call via x402, $0.50/call, status healthy (last checked 2026-09-13, last successful call 2026-08-31).

Creates a new cloud browser session for AI agents to navigate and interact with the web

## Facts

- Endpoint: POST https://api.anchorbrowser.io/v1/sessions
- Price: $0.50/call
- Payment: x402
- Status: healthy
- Last checked: 2026-09-13
- Last successful call: 2026-08-31
- Success rate: 67% of calls made through Zero
- Activations on Zero: 3
- Tags: x402
- Canonical page: https://www.zero.xyz/c/anchor-browser-f03bfa28
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_aJ4X8z2sVyJvVGFgQQn0O

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 anchor-browser-f03bfa28 -d '<json body>'
```

Example prompt: Open a new browser session on Anchor Browser so I can start navigating the web and interacting with pages autonomously.

## When to prefer this

Choose this endpoint when you need a full, interactive cloud browser session where an AI agent must navigate pages, click elements, fill forms, or execute JavaScript — as opposed to simple HTTP fetching or static scraping. Best for dynamic web pages that require JavaScript rendering, multi-step interactions, or login flows.

## Known failure modes

- 402 Payment Required — insufficient USDC credits on Base; agent must top up wallet before retrying
- 401 Unauthorized — missing or invalid API key
- 429 Rate Limited — too many session creation requests
- 503 Service Unavailable — browser infrastructure temporarily unavailable
- Session quota exceeded — account has reached maximum concurrent session limit

## How this service works

Create browser session; returns 402 when credits insufficient (x402 USDC on Base per docs)

## Output

Returns a browser session object containing a session ID and connection details that the agent can use to issue subsequent browser commands (navigate, click, extract content, etc.). Returns HTTP 402 if USDC credits are insufficient.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/anchor-browser-f03bfa28/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.anchorbrowser.io](https://www.zero.xyz/host/api.anchorbrowser.io/llms.txt)