> ## 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. > ## Agent Instructions > Phaseo Gateway base URL: https://api.phaseo.app/v1. Send `Authorization: Bearer $PHASEO_API_KEY` with every request. > Model IDs look like `provider/model`, for example `openai/gpt-6-astra`. Do not guess IDs: list them with `GET /v1/models` or check https://phaseo.app/models. `phaseo/free` routes to an available free model and needs no wallet balance. > For new text integrations prefer `POST /v1/responses`. `POST /v1/chat/completions` (OpenAI format) and `POST /v1/messages` (Anthropic format) suit existing code. > The full API contract is https://phaseo.app/docs/openapi/v1/openapi.yaml. Official SDKs: `@phaseo/sdk` (TypeScript) and `phaseo` (Python), plus Go, C#, PHP, Ruby and Rust. > Search these docs over MCP at https://phaseo.app/docs/mcp, and install Phaseo skills with `npx skills add https://phaseo.app/docs`. If a page is wrong or out of date, report it with the MCP `submit_feedback` tool. > Manage Phaseo accounts with the `phaseo` CLI (`npm install -g @phaseo/cli`, then `phaseo login` or `phaseo login --device-code`), the `/v1` Management API or the MCP server at `https://mcp.phaseo.app/mcp?access=manage`. Do not send users to the dashboard for account tasks. A person is still needed for sign-up, approving a sign-in, paying the first top-up on the checkout link that `phaseo credits add` returns when no card is saved, confirming each saved-card top-up from the emailed link, and account security (password, MFA, passkeys). Create API keys with `phaseo keys create --name --json`; never guess one. Credit top-ups need `phaseo login --scopes billing:write` first. Task map: https://phaseo.app/docs/v1/developers/manage-from-an-agent.md. # Integrations > Connect Phaseo to popular SDKs, frameworks, agents, and observability tools. Most integrations work by pointing an OpenAI-compatible or Anthropic-compatible client at Phaseo and using a Phaseo API key. Start with the guide for the tool you already use. ## Base URLs | Client style | Base URL | | - | - | | OpenAI-compatible clients | `https://api.phaseo.app/v1` | | Anthropic-compatible clients | `https://api.phaseo.app` | Use model ids from the [Models endpoint](https://phaseo.app/docs/v1/api-reference/endpoint/models.md). For new OpenAI-style apps, prefer [Responses](https://phaseo.app/docs/v1/api-reference/endpoint/responses.md). For older libraries, [Chat Completions](https://phaseo.app/docs/v1/api-reference/endpoint/chat-completions.md) is usually the safest path. ## SDKs and direct clients > [card] [OpenAI SDK](https://phaseo.app/docs/v1/guides/integrations/openai-sdk.md) > > Use official OpenAI clients with the Phaseo base URL. > [card] [Anthropic SDK](https://phaseo.app/docs/v1/guides/integrations/anthropic-sdk.md) > > Use Anthropic-compatible clients through `/v1/messages`. > [card] [AI SDK](https://phaseo.app/docs/v1/guides/integrations/ai-sdk.md) > > Use the first-party Phaseo provider for the Vercel AI SDK. > [card] [LiteLLM](https://phaseo.app/docs/v1/guides/integrations/litellm.md) > > Route LiteLLM traffic through Phaseo or expose Phaseo behind a LiteLLM proxy. ## App and agent frameworks > [card] [LangChain](https://phaseo.app/docs/v1/guides/integrations/langchain.md) > > Use LangChain Python with `ChatOpenAI` and the Phaseo base URL. > [card] [LlamaIndex](https://phaseo.app/docs/v1/guides/integrations/llamaindex.md) > > Use Phaseo for RAG and indexing workflows. > [card] [PydanticAI](https://phaseo.app/docs/v1/guides/integrations/pydanticai.md) > > Build typed Python agents against Phaseo. > [card] [Mastra](https://phaseo.app/docs/v1/guides/integrations/mastra.md) > > Use Phaseo inside Mastra agents and workflows. > [card] [TanStack AI](https://phaseo.app/docs/v1/guides/integrations/tanstack-ai.md) > > Connect TanStack AI's OpenAI-compatible adapter. > [card] [Effect AI SDK](https://phaseo.app/docs/v1/guides/integrations/effect-ai.md) > > Use Phaseo from Effect TypeScript applications. ## Platforms and operations > [card] [LiveKit](https://phaseo.app/docs/v1/guides/integrations/livekit.md) > > Use Phaseo models in LiveKit Agents and voice applications. > [card] [Replit](https://phaseo.app/docs/v1/guides/integrations/replit.md) > > Build and deploy Replit applications with Phaseo. > [card] [Workflow Automation](https://phaseo.app/docs/v1/guides/integrations/automation.md) > > Call Phaseo from Zapier, n8n, Pipedream, and similar platforms. > [card] [Infisical](https://phaseo.app/docs/v1/guides/integrations/infisical.md) > > Prepare scoped, zero-downtime Phaseo API key rotation. ## Coding agents and observability > [card] [Coding Agents](https://phaseo.app/docs/v1/guides/integrations/coding-assistants.md) > > Use the Phaseo CLI or manual provider settings with Cursor, VS Code, Continue, Aider, Cline, Roo Code, Kilo Code, and related tools. > [card] [Claude Code](https://phaseo.app/docs/v1/guides/integrations/claude-code.md) > > Route Claude-compatible coding workflows through Phaseo. > [card] [Codex](https://phaseo.app/docs/v1/guides/integrations/codex.md) > > Use Phaseo as a Codex provider. > [card] [DeepSeek Harness](https://phaseo.app/docs/v1/guides/integrations/deepseek-harness.md) > > Add Phaseo as a custom OpenAI-compatible provider in DeepSeek Harness. > [card] [OpenCode](https://phaseo.app/docs/v1/guides/integrations/opencode.md) > > Configure OpenCode with a custom Phaseo provider. > [card] [Pi](https://phaseo.app/docs/v1/guides/integrations/pi.md) > > Install Pi with the complete Phaseo model catalog. > [card] [oh-my-pi](https://phaseo.app/docs/v1/guides/integrations/oh-my-pi.md) > > Run oh-my-pi through Phaseo with an isolated provider catalog. > [card] [MiniMax Code](https://phaseo.app/docs/v1/guides/integrations/minimax-code.md) > > Run MiniMax Code through Phaseo with temporary provider configuration. > [card] [Muse Code](https://phaseo.app/docs/v1/guides/integrations/muse-code.md) > > Run Muse Code through Phaseo with temporary provider configuration. > [card] [Prime Agent](https://phaseo.app/docs/v1/guides/integrations/prime-agent.md) > > Configure Prime Agent for long-running work through Phaseo. > [card] [Observability](https://phaseo.app/docs/v1/guides/integrations/observability.md) > > Send Phaseo traffic through Langfuse, LangSmith, OpenTelemetry, or similar tooling. > [card] [Docs MCP](https://phaseo.app/docs/v1/guides/integrations/docs-mcp.md) > > Add live Phaseo documentation to coding agents. ## Useful defaults * Set `PHASEO_API_KEY` once and map it to the environment variable expected by the client. * Keep the model id unchanged, for example `openai/gpt-5-nano`. * Use `https://api.phaseo.app/v1` for OpenAI-compatible libraries unless the tool explicitly asks for the root host. * Use `https://api.phaseo.app` for Anthropic-compatible SDKs and tools that append `/v1/messages`. * Test streaming and tool calling in staging before moving agent traffic over. 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