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What is fx?

fx is a compact, open-source coding agent and command-line interface (CLI) crafted in Zig, tailored for research purposes, performance enhancement, and smooth integration into larger frameworks. Its design philosophy highlights minimalism across the system prompt, available functionalities, memory efficiency, and achieves a compact binary size of just 6 MB, striving for a user experience reminiscent of a Unix shell instead of a bulky terminal IDE. With an outstanding cold start time measured in microseconds, fx efficiently bypasses unnecessary tasks or I/O actions prior to command receipt, making it particularly well-suited for programmatic environments, resource-constrained settings, and agent sandboxes. Developers can effortlessly launch it within any project to execute a variety of functions including file reading, code searching, command execution, change implementation, test running, and real-time tool activation streaming. Its underlying architecture is model- and provider-agnostic, allowing for compatibility with local models, API gateways, direct provider connections, and cloud-based inference options. By prioritizing context efficiency, it employs a concise system prompt and a streamlined toolset to reduce token overhead and improve the speed of generating the first response token. Furthermore, this focused approach on lightweight operations and rapid interactions empowers developers to sustain their productivity without the common burdens associated with more intricate environments. In essence, fx represents a significant advancement in efficient coding tools, catering to the needs of modern developers while ensuring a straightforward operational flow.

What is epho?

Epho reimagines coding agents by turning them into a multifunctional API, which permits developers to run Claude Code, Codex, or OpenCode within secure cloud sandboxes through a single HTTP endpoint. Users have the ability to input prompts, choose a harness and model, link repositories and files, connect to MCP servers, and provide necessary environment variables or provider credentials; subsequently, Epho will set up the environment, replicate the code, integrate essential tools, and provide a real-time stream of the agent’s progress. The platform accommodates both synchronous operations, which can provide live updates, tool invocations, modifications, final outputs, and other artifacts, as well as asynchronous execution that includes polling and webhook notifications. Notably, chat sessions are designed to be persistent, ensuring that future interactions can pick up from the same filesystem, checkout, agent session, system prompt, model, and MCP configuration, even if the original sandbox is no longer available. It supports private repositories from platforms like GitHub, GitLab, and Bitbucket, with agents adept at reading code, making alterations, running tests, and debugging errors in a manner akin to a local setup. Additionally, every event is securely logged, allowing for the smooth reconnection of interrupted streams without the risk of losing data during a session. This sophisticated framework not only boosts productivity but also cultivates a more streamlined and effective coding process, ultimately empowering developers to innovate with greater ease and confidence.

Media

Media

Integrations Supported

Bitbucket
Claude Code
GitHub
GitLab
Model Context Protocol (MCP)
OpenAI Codex
OpenCode

Integrations Supported

Bitbucket
Claude Code
GitHub
GitLab
Model Context Protocol (MCP)
OpenAI Codex
OpenCode

API Availability

Has API

API Availability

Has API

Pricing Information

Free
Free Version
Free Trial Offered?

Pricing Information

$0.00013 per GiB per hour
Free Version
Free Trial Offered?

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Company Facts

Organization Name

Vercel

Date Founded

2015

Company Location

United States

Company Website

fx.sh/

Company Facts

Organization Name

epho

Company Location

United States

Company Website

epho.io

Categories and Features

Categories and Features

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