DEVELOPER DOCUMENTS

Set up, debug, estimate cost

Start with what you need: learn Codex and Claude Code in the guides, fill in your Base URL and key in the integration docs, look up errors by their message, or generate config and estimate cost in tools that run in your browser and never send your key.

31 articles · Codex CLI + Claude Code

In-depth Guides

How to install, configure, and use Codex CLI and Claude Code — from your first working task to team workflows.

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Cursor · Cline · SDK

Integration Guides

Where the Base URL goes, how to get a key, and whether the CLI can edit your config — per client, each with a connection check.

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16 common errors

Error Library

Start from the exact error message and narrow it down: is it the key, the model name, rate limiting, or the network and gateway?

Open the error library

Config generator + cost estimator

Tools

Generate client config, estimate token cost, and check compatibility in the browser — requests never go through our servers.

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Content Standards and Trust CenterThree things this page covers: how the public guides are produced, how key claims are verified, and how we disclose comparisons and third-party relationships — with the same update and verification dates as the rest of the content.3 / Last verified: 2026-07-19Read the full policy