Free
Free
MIT-licensed open-source CLI installable via npm at no charge
- Access
- MIT-licensed open-source CLI installable via npm at no charge
Finding the possibilities
OpenSpec
● Identity checkedAssistant · Vendor site 2026-10-04
OpenSpec is a lightweight, configurable spec framework for software teams and coding agents. It helps groups capture living specifications, refine requirements, validate intent, and verify implementations stay aligned as code evolves.
- Category
- Assistant
- Free access
- MIT-licensed open-source CLI installable via npm at no charge
- API access
- Not confirmed
Is OpenSpec right for you?
A good fit for
Engineering teams and agent workflows that need structured specs compatible with Claude Code, Cursor, Copilot, and dozens of other tools.
Before you choose
Specs require team discipline to keep updated; the framework does not replace product discovery on its own.
Spec framework for agents
OpenSpec advertises tens of thousands of GitHub stars and rapid community adoption for keeping humans and coding agents aligned on requirements.
What it can do
Features & capabilities
Unknown is different from unavailable. Each fact carries its own evidence.
| Capability | Value | Evidence | Checked |
|---|---|---|---|
| Install | Site documents npm install -g @fission-ai/openspec@latest. | Facts sourced | 2026-10-04 |
| Compatibility | Lists integrations with Claude Code, Codex, Cursor, Copilot, Gemini CLI, and many other agent environments. | Facts sourced | 2026-10-04 |
| Workflow | Provides /opsx commands such as explore, propose, and refine for spec-driven development. | Facts sourced | 2026-10-04 |
Understand the total cost
OpenSpec pricing & plans
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Frequently asked questions
What is OpenSpec used for?
OpenSpec is a lightweight, configurable spec framework for software teams and coding agents. It helps groups capture living specifications, refine requirements, validate intent, and verify implementations stay aligned as code evolves.
Does OpenSpec have a free plan?
MIT-licensed open-source CLI installable via npm at no charge. This record lists ongoing free access; check the plan limits before starting.
How much does OpenSpec cost?
No paid monthly price is listed; this record treats the product as free to start. See the plan cards for entitlements, billing commitments and seat minimums.
Can I use OpenSpec through an API?
Not confirmed. API access and subscription access may have different terms; consult the linked sources.
What should I check before choosing it?
Specs require team discipline to keep updated; the framework does not replace product discovery on its own.
Price history
No retained pricing changes yet. A current price alone does not establish a historical trend.
How this profile is supported
Identity and profile
Reviewed vendor source
Read original source ↗Facts apply to the named version and check date. Send a sourced correction if something changed.