# Browser Use Cloud API - Session Creation (x402) > Browser Use Cloud API - Session Creation (x402) is a paid API for AI agents from x402.api.browser-use.com, paid per call via x402, $1/call, status healthy (last checked 2026-09-15, last successful call 2026-09-02). Creates a new browser automation session via Browser Use Cloud, billed pay-per-use in USDC through the x402 payment protocol. ## Facts - Endpoint: POST https://x402.api.browser-use.com/api/v3/sessions - Price: $1/call - Payment: x402 - Status: healthy - Last checked: 2026-09-15 - Last successful call: 2026-09-02 - Success rate: 100% of calls made through Zero - Rating: 5.0 / 5 from 1 review - Activations on Zero: 1 - Tags: x402 - Canonical page: https://www.zero.xyz/c/browser-use-cloud-api-session-creation-x402-5d07b71e - Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xkMrj1THQNNiNt7pYuA3O 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 browser-use-cloud-api-session-creation-x402-5d07b71e -d '' ``` Example prompt: Start a Browser Use cloud session to log into my dashboard at example.com, navigate to the reports page, and download the latest CSV — use the GPT-4o model for agent steps and top up $5 in credits via x402. ## When to prefer this Choose this endpoint when you need to programmatically create cloud-hosted browser automation sessions with AI agent capabilities, especially when paying per-use in USDC via x402 is acceptable or preferred over a subscription model. Ideal for agents that need to browse the web, interact with web UIs, extract data from sites requiring JavaScript rendering, or execute multi-step web tasks without managing browser infrastructure. Prefer over self-hosted browser automation when you want zero infrastructure overhead and pay-only-for-what-you-use pricing. ## Known failure modes - Insufficient USDC balance — payment of $5 (or $1 minimum) required via x402 before session creation - Invalid session configuration parameters — returns 400 with validation error - Payment processing failure — x402 payment header missing or malformed - Session quota exceeded for project — returns 429 or quota error - Model not available — selected LLM model unavailable, returns 400 or 503 - Network timeout during session initialization — returns 503 or timeout error ## How this service works Browser Use: AI browser automation agents in the cloud. POST a natural-language task and an agent navigates websites, fills forms, clicks buttons, extracts structured data, and completes multi-step workflows just like a human. Stealth-enabled remote browsers with CAPTCHA solving, residential proxies, live session view, and optional structured output. Payments top up your balance; managing your session is free — you only pay to open a new browser. Docs: https://docs.browser-use.com ## Output Returns a newly created browser session object including session ID, status, and associated project credit balance. The session can then be used to execute agent steps (billed at $0.002–$0.10 per step depending on model), with unused credits carrying over to future requests. ## Request schema (JSON Schema) ```json { "type": "object", "$schema": "https://json-schema.org/draft/2020-12/schema", "required": [ "input" ], "properties": { "input": { "type": "object", "required": [ "type", "method", "bodyType", "body" ], "properties": { "body": { "type": "object", "required": [ "task" ], "properties": { "task": { "type": "string", "description": "Natural-language instructions for the agent to execute in a remote browser." }, "model": { "type": "string", "description": "LLM powering the agent: \"gemini-3-flash\" (fast/cheap), \"claude-sonnet-5\" (balanced), \"claude-opus-4.7\" (most capable, default), \"claude-opus-4.8\" (newest Opus tier)." }, "keepAlive": { "type": "boolean", "description": "Keep the session idle after the task completes so follow-up tasks reuse browser state." }, "sessionId": { "type": "string", "description": "Dispatch the task to an existing idle session instead of creating a new one." }, "maxCostUsd": { "type": "number", "description": "Maximum total cost in USD for this session; the task stops when reached." }, "outputSchema": { "type": "object", "description": "JSON Schema the agent's final output must conform to; enables structured output." }, "enableRecording": { "type": "boolean", "description": "Record a video of the browser session, returned as recordingUrls." }, "proxyCountryCode": { "type": "string", "description": "Country code for the browser proxy (e.g. \"US\", \"DE\", \"JP\"). Defaults to \"US\"." } } }, "type": { "type": "string", "const": "http" }, "method": { "enum": [ "POST", "PUT", "PATCH" ], "type": "string" }, "bodyType": { "enum": [ "json", "form-data", "text" ], "type": "string" } }, "additionalProperties": false }, "output": { "type": "object", "required": [ "type" ], "properties": { "type": { "type": "string" }, "example": { "type": "object", "required": [ "id", "status" ], "properties": { "id": { "type": "string", "description": "Session id — poll GET /api/v3/sessions/{session_id} for progress." }, "output": { "description": "Agent's final … (truncated) ``` ## Response schema (JSON Schema) ```json { "type": "json", "example": { "id": "3f6f2f64-3bfa-4643-a723-000000000000", "output": "Example Domain", "status": "stopped", "liveUrl": "https://cloud.browser-use.com/live/...", "stepCount": 3, "isTaskSuccessful": true } } ``` ## More - Live health (JSON, refreshed every minute): https://www.zero.xyz/c/browser-use-cloud-api-session-creation-x402-5d07b71e/health.json - [Zero catalog index](https://www.zero.xyz/llms.txt) - [Other services from x402.api.browser-use.com](https://www.zero.xyz/host/x402.api.browser-use.com/llms.txt)