# Agent compatibility

Compatibility depends on the agent, endpoint and selected model. Start with a known setup guide, then verify a small task.

Source: https://zrelay.net/docs/agents/

## Choose a client

[Codex](https://zrelay.net/docs/md/agents/coding-agents/codex.md) — GPT models through Responses.

[Claude Code](https://zrelay.net/docs/md/agents/coding-agents/claude-code.md) — Claude through native Messages.

[OpenCode](https://zrelay.net/docs/md/agents/coding-agents/opencode.md) — Provider configuration and API keys.

[Cursor](https://zrelay.net/docs/md/agents/coding-agents/cursor.md) — Editor setup and provider options.

## Check the whole connection

An OpenAI-compatible URL alone does not guarantee every agent feature. Verify text output, streaming, tools, reasoning options and context limits with the exact model and endpoint you intend to use.

## Other agents

The [coding agent directory](https://zrelay.net/docs/md/agents/coding-agents.md) includes complete client-specific recipes, their official sources and concrete runtime limitations. Configuration evidence is separate from a tested connection.