# Reloop

> Reloop is high-performance, open-source email infrastructure for developers—transactional and marketing email, SMTP, webhooks, analytics, and agent-ready APIs. Use Reloop hosted or self-host.

Important notes:

- Authentication uses the `x-api-key` header with API keys prefixed with `rl_`
- Prefer markdown: append `.md` where available (blog, pricing, docs)
- **All agent discovery files are hosted on this site (web)** — not under the docs app
- Product HTML docs still live under `/docs/*` with `.md` twins for page content

## Agent discovery (source of truth)

- [Site index](https://reloop.sh/llms.txt): This file
- [Marketing corpus](https://reloop.sh/llms-full.txt): Home, pricing, agent pages, published blog
- [Docs index](https://reloop.sh/llms-docs.txt): Curated API, learn, and integration map
- [Docs full corpus](https://reloop.sh/llms-full-docs.txt): Full documentation snapshot
- [Product skill](https://reloop.sh/skill.md): Capabilities, auth, constraints
- [Pricing (markdown)](https://reloop.sh/pricing.md): Structured plan and price data
- [Sitemap (markdown)](https://reloop.sh/sitemap.md): All public marketing URLs
- [Site MCP](https://reloop.sh/mcp): Search marketing content
- [Docs MCP](https://reloop.sh/docs/mcp): Search product documentation (runtime API on docs app)
- [MCP discovery](https://reloop.sh/.well-known/mcp.json): Machine-readable MCP location

## Marketing

- [Home](https://reloop.sh/) · [markdown](https://reloop.sh/index.md)
- [Pricing](https://reloop.sh/pricing) · [markdown](https://reloop.sh/pricing.md)
- [Developers](https://reloop.sh/developers) · [markdown](https://reloop.sh/developers.md)
- [About](https://reloop.sh/about) · [markdown](https://reloop.sh/about.md)
- [Features](https://reloop.sh/features)
- [Blog](https://reloop.sh/blog)
- [Changelog](https://reloop.sh/changelog)
- [Compare](https://reloop.sh/compare)
- [Glossary](https://reloop.sh/glossary)
- [Contact](https://reloop.sh/contact)

## Product documentation (HTML + .md under /docs)

Prefer [llms-docs.txt](https://reloop.sh/llms-docs.txt) for the full map. High-signal entry points:

- [API Keys (agent)](https://reloop.sh/docs/learn/ai/api-keys.md)
- [Introduction](https://reloop.sh/docs/introduction.md)
- [API reference](https://reloop.sh/docs/api.md)
- [MCP server guide](https://reloop.sh/docs/integrations/ai-tools/mcp-server)

## Blog (published; prefer `/blog/<slug>.md`)

- [Email provider comparison 2026](https://reloop.sh/blog/email-provider-comparison-2026.md)
- [Self-hosted email infrastructure](https://reloop.sh/blog/self-hosted-email-infrastructure.md)
- [SPF, DKIM, DMARC setup](https://reloop.sh/blog/spf-dkim-dmarc-setup-guide.md)
- [Migrating from SendGrid](https://reloop.sh/blog/migrating-from-sendgrid.md)
- [Transactional email best practices](https://reloop.sh/blog/transactional-email-best-practices.md)

## Optional

- [GitHub](https://github.com/reloop-labs/reloop)
- [License](https://reloop.sh/license)
- [Privacy](https://reloop.sh/privacy)