> ## Documentation Index > Fetch the complete documentation index at: https://phaseo.app/docs/llms.txt > Use this file to discover all available pages before exploring further. # Guides > Find the right Phaseo guide for first setup, feature work, integrations, and production operations. Use this page when you know the kind of work you are doing and want the shortest route to the right guide. ## New integration path If this is your first Phaseo integration, follow these in order: 1. [Quickstart](../quickstart): make one successful request. 2. [Authentication](../developers/authentication): store and send keys safely. 3. [Examples](./examples): copy request patterns into your app. You can call `:free` models without depositing credits. Paid models still require available wallet balance. ## Build app features Use these guides when a basic request is already working and you are adding product behavior. Scenario-driven recipes for free routing, presets, async jobs, and coding-agent setup. Control provider order, failover behavior, and reliability tradeoffs. Implement function tools, safety checks, and stable tool loops. Use Phaseo-operated datetime, web search, web fetch, and Advisor tools. Use schemas for predictable machine-readable responses. Ship low-latency responses with SSE and production guardrails. Reuse stable prompt context across Chat Completions, Responses, and Anthropic Messages. ## Operate in production Use these guides when traffic, reliability, security, and key lifecycle start to matter. Debug by status code, error shape, and retry strategy. Operational checklists for provider activation, async endpoints, metadata rollout, and validation hygiene. Plan for throughput and backoff under load. Hardening checklist for reliability and safety. Automate key lifecycle and environment isolation.