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# X Developer Platform > Build, analyze, and innovate with X's real-time, global data and APIs. Comprehensive documentation for the X API v2, Ads API, Enterprise APIs (Account Activity, X Activity, GNIP/PowerTrack), official SDKs, tutorials, and AI-agent tools (llms.txt, skill.md, MCP). ## Start Here - [Overview](https://docs.x.com/overview.md): Introduction to the X Developer Platform - [Getting Access & First Request](https://docs.x.com/make-your-first-request.md): Quickstart for new developers - [What to Build](https://docs.x.com/what-to-build.md): Use-case ideas and inspiration - [Developer Guidelines & Policies](https://docs.x.com/developer-guidelines.md): Rules for building responsibly - [AI & Agent Resources](https://docs.x.com/tools/ai.md): llms.txt, skill.md, MCP, and Grok/Cursor integration ## Major Documentation Areas (Nested Indexes) - [X API v2 — Full Index](https://docs.x.com/x-api/llms.txt): 370+ reference pages (Posts, Users, DMs, Lists, Spaces, Streams, Compliance, Webhooks, Media, etc.) - [Enterprise APIs — Full Index](https://docs.x.com/enterprise-api/llms.txt): Account Activity, X Activity (XAA), Compliance, Chat, Communities, Direct Messages, News, Trends, Webhooks, and historical GNIP/PowerTrack - [Ads API — Full Index](https://docs.x.com/x-ads-api/llms.txt): Campaign management, creatives, audiences, analytics, measurement, and conversions - [SDKs (XDKs) — Full Index](https://docs.x.com/xdks/llms.txt): Python + TypeScript/JavaScript SDK clients, models, and references - [Python XDK Detail](https://docs.x.com/xdks/python/llms.txt) · [TypeScript XDK Detail](https://docs.x.com/xdks/typescript/llms.txt) ## Key Fundamentals & Tools - [X API Fundamentals](https://docs.x.com/x-api/fundamentals/data-dictionary.md): Fields, expansions, pagination, versioning, consistency, rate limits - [Authentication Guides](https://docs.x.com/fundamentals/authentication/overview.md): OAuth 1.0a, OAuth 2.0, Bearer tokens, app-only, user context - [Tools & Libraries](https://docs.x.com/tools-and-libraries.md): Official SDKs, Postman, twurl, xurl - [Changelog](https://docs.x.com/changelog.md): Platform updates and new endpoints - [Tutorials](https://docs.x.com/tutorials.md): In-depth code examples and integration guides ## For AI Agents & LLMs - [AGENTS.md](https://docs.x.com/AGENTS.md) / [AGENT.md](https://docs.x.com/AGENT.md): Explicit instructions for AI agents on how to best use this documentation - [llms-full.txt](https://docs.x.com/llms-full.txt): Entire documentation set as a single Markdown file (maximum context) - [Raw Markdown for any page](https://docs.x.com/tools/llms-txt.md): Append `.md` to any docs.x.com URL - [skill.md](https://docs.x.com/tools/skill-md.md): Structured capability summary (agentskills.io) - [MCP Server](https://docs.x.com/tools/mcp.md): Hosted X MCP (api.x.com/mcp via xurl) + docs search MCP - [OpenAPI Specification](https://docs.x.com/openapi.json): Machine-readable contract All pages are also available under `/.well-known/llms.txt`. Every documentation page supports the `.md` suffix for clean Markdown retrieval by agents.