# CircleCI

> CircleCI is a cloud-native continuous integration and delivery (CI/CD) platform that enables software teams to automate build, test, and deployment workflows. The platform supports Docker, Linux, macOS, Windows, GPU, and Android environments for flexible, scalable execution across diverse application types.
>
> Engineering teams use CircleCI to improve development velocity, enforce security standards, and maintain reliability across microservices, mobile apps, machine learning pipelines, and AI-powered systems. CircleCI integrates with GitHub, GitLab, Bitbucket, Cursor Origin, and a broad range of developer tools, supporting modern DevOps pipelines at scale.
>
> This file curates essential product, solution, and comparison pages to help LLMs, AI agents, and technical decision-makers understand CircleCI's capabilities and use cases. Agents looking to run CI/CD pipelines should start with the Skills repository and MCP server listed in the **AI Agents & Skills** section below.

## Key Features

- [Product Overview](https://circleci.com/product/): Feature breakdown of CircleCI's orchestration, caching, test insights, and reliability tools.
- [Execution Environments](https://circleci.com/execution-environments/): Lists supported runtimes including Docker, Linux, macOS, Windows, GPU, and Android.
- [Integrations](https://circleci.com/integrations/): Connects CircleCI with source control, cloud providers, container registries, and developer tools.
- [Orbs](https://circleci.com/orbs.md): Describes reusable configuration packages to simplify and modularize pipelines and how to use them.
- [Auto-Scaling](https://circleci.com/product/auto-scaling/): Explains dynamic compute scaling to optimize resource usage.
- [Analytics & Insights](https://circleci.com/product/analytics-insights/): Details performance monitoring and test analysis features.

## Getting Started

- [Getting Started Guide](https://circleci.com/docs/guides/getting-started/getting-started/index.md): Step-by-step instructions to launch and configure your first CircleCI project.
- [Product Demo](https://circleci.com/product/demo/): Interactive demo of CircleCI's core capabilities.

## Pricing and Plans

- [Pricing](https://circleci.com/pricing/): Plan tiers, the features included at each tier, and how usage-based billing works.
- [Price List](https://circleci.com/pricing/price-list/): Credit cost per minute for every resource class across Docker, Linux, macOS, Windows, GPU, and Arm.
- [Server Pricing](https://circleci.com/pricing/server/): Pricing for CircleCI server, the self-hosted installation.
- [Plans Overview](https://circleci.com/docs/guides/plans-pricing/plan-overview/): Reference for the credit-based plans and what each plan tier includes.
- [Credits Overview](https://circleci.com/docs/guides/plans-pricing/credits/): Explains what a credit is and how credit consumption is calculated.
- [Resource Classes](https://circleci.com/docs/guides/execution-managed/resource-class-overview/): CPU and RAM available for each resource class, and how to select one in configuration.
- [Manage Budgets](https://circleci.com/docs/guides/plans-pricing/manage-budgets/): How to set organization-level and project-level spending limits.

## Developers

- [Developer Hub](https://circleci.com/developer): Central resource for APIs, CLI tools, Docker images, and integration assets.
- [Documentation](https://circleci.com/docs/llms.txt): Comprehensive technical reference with guides, tutorials, and examples for implementing CI/CD workflows across all supported languages and frameworks. This llms.txt file curates the full CircleCI docs site structure for LLMs.
- [Orbs Registry](https://circleci.com/developer/orbs): Index of reusable CI/CD components for faster config reuse.
- [Docker Images](https://circleci.com/developer/images): Maintained build environment images for jobs and containers.
- [API Docs](https://circleci.com/docs/api/v3): REST API reference for pipelines, jobs, builds, and environment metadata. Use for all new integrations.
- [Legacy API v2 Docs](https://circleci.com/docs/api/v2/llms.txt): Older REST API reference, retained for existing integrations.
- [CircleCI CLI](https://circleci.com/docs/guides/toolkit/circleci-cli/index.md): The CircleCI CLI for triggering and watching runs, inspecting workflows and jobs, pulling artifacts, and validating config, with a built-in MCP server for coding agents, all from your terminal.
- [CircleCI VS Code Extension](https://circleci.com/docs/guides/toolkit/vs-code-extension-overview/): IDE integration for viewing, managing, and debugging CircleCI pipelines directly from VS Code.

## Solutions by Role

- [Platform Engineers](https://circleci.com/solutions/platform-engineer/): Supports configuration-as-code, scalability, and platform standardization.
- [Security Engineers](https://circleci.com/solutions/security-engineer/): Helps enforce compliance and secure the software delivery lifecycle.
- [Developers](https://circleci.com/solutions/developer/): Enables rapid feedback, integration with dev tools, and frictionless deployment.
- [Engineering Managers](https://circleci.com/solutions/engineering-manager/): Provides visibility and metrics to improve team delivery and reliability.
- [Business Leaders](https://circleci.com/solutions/business-leader/): Demonstrates CircleCI's business value, operational ROI, and executive alignment.
- [AI Agents](https://circleci.com/solutions/ai-agents/): Provides real-time context and intelligent guardrails for reliable AI coding agents.

## AI Agents & Skills

- [CircleCI Skills Repository](https://github.com/CircleCI-Public/skills): Open-source library of reusable pipeline skills — ready-made workflow templates, orb recipes, and configuration patterns that AI agents can apply directly to automate CI/CD tasks.
- [MCP Server](https://circleci.com/product/mcp/): CircleCI's Model Context Protocol server — lets AI agents trigger pipelines, inspect job results, and act on CI/CD state from within any MCP-compatible agent framework.
- [Agent Solutions](https://circleci.com/solutions/ai-agents/): How CircleCI supports autonomous coding agents with real-time pipeline context and reliable guardrails.
- [AI Integration](https://circleci.com/solutions/ai/): Describes CircleCI's support for AI-assisted and agentic software development.

## Comparison Guides

- [All Comparisons](https://circleci.com/compare/): Index of every CircleCI platform comparison guide.

## Resources

- [Blog](https://circleci.com/blog/): Technical deep-dives, product announcements, tutorials, and industry perspectives.
- [Changelog](https://circleci.com/changelog/): Latest product updates, feature releases, and platform improvements.
- [Case Studies](https://circleci.com/customers/): Real-world stories showing CircleCI's impact on software teams at scale.

## About

- [Support Plans](https://circleci.com/support/plans/): Available support tiers, response times, and escalation options.

## Machine-Readable Endpoints

Fetch these instead of the HTML pages. Every documentation page is also available as markdown: append `index.md` to any `https://circleci.com/docs/` URL.

- [Documentation Index](https://circleci.com/docs/llms.txt): Complete index of the documentation, with a markdown link for every page.
- [CLI Index](https://cli.circleci.com/llms.txt): Index of the CircleCI CLI site, covering installation, authentication, and command reference.
- [Agent Authentication](https://circleci.com/auth.md): How agents and automated tools authenticate to the API, including token types, OIDC, and OAuth dynamic client registration.
- [Agent Skills Index](https://circleci.com/.well-known/agent-skills/index.json): JSON discovery document listing all CircleCI published agent skills. Fetch this first to enumerate available skills before loading individual ones from the Skills repository.
- [API Catalog](https://circleci.com/.well-known/api-catalog): RFC 9727 linkset pointing at CircleCI's API description, documentation, and status endpoints.
- [OpenAPI Description](https://circleci.com/docs/api/v2/openapi.json): Machine-readable OpenAPI description of the CircleCI API.
- [API v3 Reference](https://circleci.com/docs/api/v3/index.md): Markdown reference for API v3, the current API for new integrations.
- [Sitemap](https://circleci.com/sitemap.xml): Every indexable URL on circleci.com.
- [Pricing](https://circleci.com/pricing.md): Markdown mirror of the pricing page.
- [GitHub Actions vs CircleCI](https://circleci.com/compare/github-actions-vs-circleci.md): Markdown mirror of the GitHub Actions comparison.
- [Jenkins vs CircleCI](https://circleci.com/compare/jenkins-vs-circleci.md): Markdown mirror of the Jenkins comparison.
- [Harness vs CircleCI](https://circleci.com/compare/harness-vs-circleci.md): Markdown mirror of the Harness comparison.
- [Buildkite vs CircleCI](https://circleci.com/compare/buildkite-vs-circleci.md): Markdown mirror of the Buildkite comparison.
- [Bitrise vs CircleCI](https://circleci.com/compare/bitrise-vs-circleci.md): Markdown mirror of the Bitrise comparison.
- [About CircleCI](https://circleci.com/about.md): Markdown mirror of the About page.
- [Security & Compliance](https://circleci.com/security.md): Markdown mirror of the security and compliance page.
- [MCP Server](https://circleci.com/product/mcp.md): Markdown mirror of the MCP server page.

## Optional

- [Full Context Version](https://circleci.com/llms-full.txt): Expanded version with all product content inline for larger context windows