eve

eve

Vercel
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About

OpenHarness is an open-source TypeScript SDK for developers building custom AI-agent applications, including coding agents, CLI tools, and web-based assistants. It provides stateless agent execution, explicit conversation-state handling, streaming events, composable middleware for retries, persistence and context compaction, hierarchical subagents, and permission-controlled tools. Developers can connect model providers through the Vercel AI SDK, add external capabilities through Model Context Protocol (MCP), and use filesystem or shell tools through configurable providers. The SDK also offers React hooks and Vue composables for streaming agent output into application interfaces. OpenHarness is installed as an npm package and is intended to be embedded in projects running on Node.js or edge runtimes; it is a developer library rather than a hosted end-user agent service.

About

Eve is the framework for building agents, like Next.js for web apps, but for agents. It uses Markdown for instructions and skills, TypeScript for tools, and durable execution by default. An agent is a directory that defines instructions and skills in Markdown, tools in TypeScript, and then deploys. Eve compiles the directory, wires up durable workflows, and connects channels, giving developers a structured way to build production agents without gluing together point solutions. An instructions.md file can be a complete agent, while agent.ts lets teams choose a model or configure the runtime. Reusable skills are Markdown playbooks loaded when relevant, so the agent gets focused guidance without carrying everything in every prompt. Tools are added as TypeScript files, with the filename becoming the tool name, and no registration is required. Every agent includes an isolated sandbox and file tools, with support for custom sandbox setup.

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Not Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

Software developers and engineering teams building custom AI-agent applications, including coding agents, CLI tools, and web assistants.

Audience

Developers seeking to build and deploy durable AI agents using Markdown instructions, reusable skills, and TypeScript tools

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Not Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Supported

API

Offers API Supported

Screenshots and Videos

No images available

Screenshots and Videos

Pricing

No information available.
Free Version Not Supported
Free Trial Not Supported

Pricing

No information available.
Free Version Not Supported
Free Trial Not Supported

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Supported
Live Online Supported
In Person Not Supported

Company Information

OpenHarness
open-harness.dev/

Company Information

Vercel
Founded: 2015
United States
vercel.com/eve

Alternatives

Deep Agents

Deep Agents

LangChain

Alternatives

Mastra

Mastra

Mastra AI
eve

eve

Vercel
Mastra

Mastra

Mastra AI
eve

eve

Vercel

Categories

Categories

Integrations

Anthropic Supported
Discord Not Supported
Facebook Messenger Not Supported
GitHub Not Supported
Google Chat Not Supported
Linear Not Supported
Markdown Not Supported
Microsoft Teams Not Supported
Model Context Protocol (MCP) Supported
Next.js Not Supported
OpenAI Supported
Slack Not Supported
Stripe Not Supported
Twilio Not Supported
TypeScript Not Supported
Vercel Not Supported
Vercel AI SDK Supported
WhatsApp Not Supported

Integrations

Anthropic Not Supported
Discord Supported
Facebook Messenger Supported
GitHub Supported
Google Chat Supported
Linear Supported
Markdown Supported
Microsoft Teams Supported
Model Context Protocol (MCP) Not Supported
Next.js Supported
OpenAI Not Supported
Slack Supported
Stripe Supported
Twilio Supported
TypeScript Supported
Vercel Supported
Vercel AI SDK Not Supported
WhatsApp Supported
Claim OpenHarness and update features and information
Claim OpenHarness and update features and information
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