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Spec0 icon

Spec0

Spec0 keeps your OpenAPI specs in one place and keeps them honest. Push specs from CI, the CLI or a GitHub app; Spec0 versions them, computes a change-log between versions, and blocks breaking changes on the pull request rather than after they ship.

API request - testing

Cost / License

  • Freemium (Subscription)
  • Open Source (MIT)

Platforms

  • Mac
  • Windows
  • Linux
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Spec0 information

  • Developed by

    DE flagSpec0

  • Licensing

    Open Source (MIT) and Freemium product.

  • Pricing

    Subscription that costs up to $10 per month + free version with limited functionality.

  • Written in

  • Alternatives

    6 alternatives listed

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  • Supported Languages

    • English

AlternativeTo Category

AI Tools & Services

GitHub repository

  •  13 Stars
  •  1 Forks
  •  5 Open Issues
  •   Updated  
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Spec0 was added to AlternativeTo by _Nakul on and this page was last updated .

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What is Spec0?

Spec0 keeps your OpenAPI specs in one place and keeps them honest. Push specs from CI, the CLI or a GitHub app; Spec0 versions them, computes a change-log between versions, and blocks breaking changes on the pull request rather than after they ship. Ownership is modelled as teams.

Every spec also gets a schema-accurate mock server, and an MCP layer serves specs to coding agents like Cursor and Claude Code, the agent queries the one operation it needs rather than having a whole spec pasted into its context.

There's a desktop client, Spec0 Studio, for macOS, Windows and Linux (MIT), which works entirely offline with no account.

The CLI, mock server and Studio are open source. EU-hosted, encrypted at rest, bring your own model key.