# llms.txt for developers.facebook.com # See https://llmstxt.org/ for specification > Facebook Developer Documentation This site contains developer documentation for Facebook platforms and APIs. ## Documentation Sections - /docs/ - API and SDK documentation - /blog/ - Developer blog and announcements - /tools/ - Developer tools and utilities - /products/ - Product documentation ## WhatsApp Cloud API Guides & Documentation - [All Guides & Docs llms.txt](https://developers.facebook.com/documentation/business-messaging/whatsapp/llms.txt): Full index of WhatsApp Cloud API guides and documentation - [API References llms.txt](https://developers.facebook.com/documentation/business-messaging/whatsapp/reference/llms.txt): Full index of WhatsApp Cloud API endpoint reference docs ## Additional Resources - https://developers.meta.com - Meta Developer Platform - https://ai.meta.com - Meta AI - https://llama.meta.com - Llama models ## Meta Marketing API Guidelines for AI agents and automated tools using the Meta Marketing API (Graph API) and Ads MCP Server. ### Agent Self-Identification Include structured identification in your User-Agent HTTP header on all requests. Format: / () Examples: User-Agent: MyAdBot/1.3 (GPT-4o) python-requests/2.31.0 User-Agent: CampaignAgent/2.0 (Claude-Sonnet-4) axios/1.7.2 User-Agent: AdOptimizer/0.9 (Gemini-2.5-Flash) curl/8.4.0 Fields: - AgentName (required): Your agent or product name. Be consistent across requests. - Version (required): Semantic version of your agent. - ModelName (recommended): LLM model powering the agent. Omit if unknown. - HTTPClient (existing): Keep your HTTP library's default UA string. Rules: - Append agent info to the existing User-Agent. Do not replace it. - Use the same agent name on every request. Do not randomize. - Do not impersonate other agents.