---
title: "Scalar Mock Server Skill - Air Market"
description: "You need something that answers like your API before the real one exists, or so you can develop against it. This helps you build that mock server from your API description, customize how it responds,…"
canonical: "https://airmarket.ai/app/mock-server"
---

[Air Market](/) / [Developer Tools](/category/devtools) / Scalar Mock Server Skill

Skill by [Scalar](/@scalar)

# Scalar Mock Server Skill

Stand up a fake API from your OpenAPI file

## What this does

You need something that answers like your API before the real one exists, or so you can develop against it. This helps you build that mock server from your API description, customize how it responds, and sort out problems when it does not behave. Reach for it when the real backend is not there yet.

### Top 3 things it does for you

- Build a mock server from my OpenAPI spec
- Add custom handlers and seed data to a mock
- Work out why my mock server is misbehaving

## Information

**Scalar Mock Server Skill at a glance**

|  |  |
| --- | --- |
| Kind | Skill |
| Publisher | [Scalar](/@scalar) |
| Category | [Developer Tools](/category/devtools) |
| Works with | Agent Skills - an open standard supported by 40+ agents |
| Size | 4 KB |
| Licence | MIT |
| Repository | [scalar/scalar](https://github.com/scalar/scalar/tree/6566533ad93a41c4743dc78a1d46557c097772e6/.agents/skills/mock-server) |
| GitHub stars | 15,979 (as of Nov 2026) |
| Installs | 25, counted by skills.sh (Nov 2026) |

## Security report

**Verified.** AIR scanned this exact version of Scalar Mock Server Skill and flagged nothing. AIR's verdict: **safe**.

**What Scalar Mock Server Skill's check was run against**

|  |  |
| --- | --- |
| Commit | 6566533ad93a41c4743dc78a1d46557c097772e6 |
| Content hash | db1f9615d2681010b12d371ef30e1581fc728491d3f0b22088aab7673a5be56d |
| Files read | [Browse the files at this exact commit](https://github.com/scalar/scalar/blob/6566533ad93a41c4743dc78a1d46557c097772e6/.agents/skills/mock-server/SKILL.md) |

A scan is named by the exact content it read, not by a version number. A different version is a different artifact, and nothing here applies to a version AIR has not scanned.

[Read the full security report for Scalar Mock Server Skill](/security/mock-server)

## About Scalar Mock Server Skill

This covers building, customizing, and troubleshooting OpenAPI mock servers with @scalar/mock-server.

Customization and setup are part of it, not just the basic case: x-handler and x-seed for shaping responses and data, authentication, and running under Docker.

## What's inside

- SKILL.md - instructions

## Questions

### Is Scalar Mock Server Skill safe to install?

AIR scanned this exact version of Scalar Mock Server Skill and flagged nothing. AIR's verdict: safe. The verdict is named by the content that was read, at commit 6566533ad93a, so it cannot drift onto a version nobody scanned. The full report is at https://airmarket.ai/security/mock-server.

### How do I install Scalar Mock Server Skill?

Open https://airmarket.ai/app/mock-server on Air Market and use the install action: Air Market hands Claude a prompt naming this exact skill, and Claude sets it up. Source, pinned to the exact commit this listing describes: https://github.com/scalar/scalar/tree/6566533ad93a41c4743dc78a1d46557c097772e6/.agents/skills/mock-server. Install from that link, not the branch.

## Related on Air Market

- [More Developer Tools listings](/category/devtools)
- [Everything by Scalar](/@scalar)

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Canonical URL: <https://airmarket.ai/app/mock-server>