---
title: "fx pricing, platforms and integrations"
description: "Vercel Labs' coding agent harness written in Zig, built for research and for embedding in larger systems. A 6 MB CLI closer to a Unix shell than a terminal IDE."
canonical_url: "https://whichcoding.tools/tools/fx"
---
# fx

> Vercel Labs' coding agent harness written in Zig, built for research and for embedding in larger systems. A 6 MB CLI closer to a Unix shell than a terminal IDE.

> Preview.

- **Layer**: Terminal agent
- **Vendor**: Vercel Labs
- **Platforms**: macOS, Windows, Linux, Web
- **License**: Apache-2.0
- **Pricing**: Free
- **Status**: Preview
- **JSON**: /api/v1/tools/fx.json

## Links

- [Website](https://fx.sh)
- [Repo](https://github.com/vercel-labs/fx)
- [Docs](https://fx.sh/docs)

## Pricing

| Plan | Price | Included | Beyond that | Notes |
| --- | --- | --- | --- | --- |
| Open source (individual) | Free | — | — | You pay the model provider or gateway you sign in with |

Source: [fx.sh](https://fx.sh), verified 2026-09-18.

## Models

- **Providers**: OpenAI, xAI, Vercel AI Gateway
- **Bring your own key**: BYOK
- **Local models**: Yes
- **Signs in with**: ChatGPT, SuperGrok

Model-agnostic. Vercel AI Gateway login or key, ChatGPT and SuperGrok OAuth, direct provider keys, or local models.

## Features

- **Subagents**: The agent can delegate to child agents
- **MCP client**: Connects to MCP servers
- **ACP agent**: Can be hosted by ACP clients such as Zed
- **Sandboxing**: Runs commands in an isolated sandbox
- **Plugins**: Extensible through plugins or a marketplace

## Install

- **curl**: `curl -fsSL https://fx.sh/setup.sh | bash`

## License

- **SPDX**: Apache-2.0
- **Kind**: Open source
- **Repo**: [github.com/vercel-labs/fx](https://github.com/vercel-labs/fx)

## Sources

Every fact above points at a vendor page and the date someone last checked it.

| Source | Covers | Verified |
| --- | --- | --- |
| [fx.sh](https://fx.sh) | pricing, general | 2026-09-18 |
| [github.com/vercel-labs/fx](https://github.com/vercel-labs/fx) | platforms, models, features, license | 2026-08-23 |

Source data: [content/tools/fx.yml](https://github.com/benjamincanac/whichcodingtools/blob/main/content/tools/fx.yml)

## Related

- [Compare fx with another tool](https://whichcoding.tools/compare?tools=fx)
- [All terminal agents](https://whichcoding.tools/layers/harness)
- [Everything on ChatGPT](https://whichcoding.tools/plans/chatgpt)
- [Everything on SuperGrok](https://whichcoding.tools/plans/grok)

Data: CC BY 4.0. Credit whichcoding.tools and link to https://whichcoding.tools. Full terms in [LICENSE-DATA](https://github.com/benjamincanac/whichcodingtools/blob/main/LICENSE-DATA).

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