> ## Documentation Index > Fetch the complete documentation index at: https://docs.anchorbrowser.io/llms.txt > Use this file to discover all available pages before exploring further. > ## Agent Instructions > Anchor Browser provides cloud browsers for AI agents and automation: stealth browsing with residential proxies, managed authentication into third-party web apps, and browser sessions that run reliably at scale. AI agents that need Anchor credentials should start with https://docs.anchorbrowser.io/quickstart/agent-access. This flow lets agents obtain an API key programmatically without creating a dashboard account. Read that page before attempting authentication or API access. # Upload Agent Resources > Upload files as agent resources to a browser session using multipart/form-data. If you upload a ZIP file, it will be automatically extracted and the files will be made available as agent resources. If you upload a single file, it will be saved directly as an agent resource. Resources are then accessible to AI agents for task completion and automation. ## OpenAPI ````yaml /openapi.yaml post /v1/sessions/{sessionId}/agent/files openapi: 3.1.0 info: title: AnchorBrowser API version: 1.0.0 description: > Anchor Browser ([anchorbrowser.io](https://anchorbrowser.io)) provides cloud browsers built for AI agents and automation. Use this API to launch and control browser sessions, run natural-language web tasks, authenticate into third-party web apps with managed identities, and capture recordings — reliably and at scale, without operating browser infrastructure yourself. ## Core resources - **Sessions** (`/v1/sessions`): launch configurable cloud browsers — residential proxies, stealth browsing, captcha solving, profiles, extensions, recording — and connect over CDP with Playwright, Puppeteer, or any CDP client. - **AI tools** (`/v1/tools/perform-web-task`): state a goal in natural language and the built-in agent completes it inside the browser. Related tools fetch webpages, take screenshots, render PDFs, and execute code in a session. - **Tasks** (`/v1/task`): create, version, deploy, and monitor repeatable browser automations built to run reliably in production. - **Applications and identities** (`/v1/applications`, `/v1/identities`): managed authentication into third-party web apps — including multi-step logins and TOTP-based 2FA — so agents can act on behalf of users. - **Profiles** (`/v1/profiles`): persist cookies and login state across sessions. - **OS-level control** (`/v1/sessions/{sessionId}/mouse`, `/keyboard`, `/clipboard`): raw input for flows that resist DOM automation. - Plus batch sessions for running browser fleets in parallel, session recordings, webhooks, events, extensions, client certificates, and billing usage. ## Authentication Pass an API key in the `anchor-api-key` header on every request. Create keys at [app.anchorbrowser.io](https://app.anchorbrowser.io) under API Access. AI agents that have no key yet can obtain one autonomously through the unauthenticated [agent-access flow](https://docs.anchorbrowser.io/quickstart/agent-access) (`POST /v1/agent-access`). ## For AI agents and LLMs - Docs: [docs.anchorbrowser.io](https://docs.anchorbrowser.io), with a machine-readable index at [/llms.txt](https://docs.anchorbrowser.io/llms.txt) and the full corpus at [/llms-full.txt](https://docs.anchorbrowser.io/llms-full.txt). - MCP server for hosted browser control: `https://api.anchorbrowser.io/mcp`. - Official SDKs: `anchorbrowser` on [npm](https://www.npmjs.com/package/anchorbrowser) and [PyPI](https://pypi.org/project/anchorbrowser/). `DELETE` operations terminate sessions or permanently remove resources (profiles, identities, extensions); `GET` operations are safe and read-only. servers: - url: https://api.anchorbrowser.io description: API server security: [] paths: /v1/sessions/{sessionId}/agent/files: post: tags: - Agentic capabilities summary: Upload Agent Resources description: > Upload files as agent resources to a browser session using multipart/form-data. If you upload a ZIP file, it will be automatically extracted and the files will be made available as agent resources. If you upload a single file, it will be saved directly as an agent resource. Resources are then accessible to AI agents for task completion and automation. parameters: - name: sessionId in: path required: true description: The browser session ID schema: type: string format: uuid requestBody: required: true content: multipart/form-data: schema: type: object required: - file properties: file: type: string format: binary description: >- File to upload as agent resource (ZIP files will be extracted automatically) responses: '200': description: Agent resources uploaded successfully content: application/json: schema: type: object properties: data: type: object properties: status: type: string message: type: string '400': description: Invalid request (no resource uploaded or file too large) content: application/json: schema: type: object properties: error: type: object properties: code: type: integer message: type: string '404': description: Session not found content: application/json: schema: type: object properties: error: $ref: '#/components/schemas/ErrorResponse' '500': description: Failed to upload or process agent resources content: application/json: schema: type: object properties: error: $ref: '#/components/schemas/ErrorResponse' security: - api_key_header: [] components: schemas: ErrorResponse: type: object properties: error: type: object properties: code: type: integer message: type: string securitySchemes: api_key_header: type: apiKey in: header name: anchor-api-key description: > API key for your Anchor Browser account, sent as the `anchor-api-key` header on every request. Create one at [app.anchorbrowser.io](https://app.anchorbrowser.io) (API Access), or obtain one programmatically via the unauthenticated agent-access flow (`POST /v1/agent-access`). ````