json-server
Rapidly create a mock REST API from JSON data for development and testing
- Also known as
- json-server
What is json-server?
An open-source tool that generates a full-featured REST API server from a JSON or JSON5 file, enabling rapid prototyping and testing without backend development.
json-server pricing
We don't have json-server's full plan breakdown yet (its pricing page resisted automated reading). Here's what we could confirm. Always check live pricing for exact numbers.
What json-server does
The capabilities that matter for api mocking, normalised so it lines up with every alternative. “-” means we haven't confirmed it, not that it's missing.
- Mocking mode
- Static
- Stateful scenarios
- -
- Fault chaos injection
- -
- Openapi import
- -
- Proxy passthrough
- -
- Admin API
- -
- Deployment
- CLI binary
- Legacy protocol virtualization
- -
- Collaboration sharing
- -
- Ci cd integration
- -
- Open source
- ✓
- Market segment
- Dev tool
- Pricing model
- Open source
Platform & deployment
Independently observed- CLI
- Web
- Self-hosted
Security & compliance
Known vulnerabilities: 0 (0 in the last 12 months) sourcea count reflects scale & disclosure, not quality
json-server FAQ
Common questions about json-server, answered from independent, dated evidence.
What is json-server?
An open-source tool that generates a full-featured REST API server from a JSON or JSON5 file, enabling rapid prototyping and testing without backend development. It is indexed under API Mocking.
Source: https://github.com/pricing
Is json-server free to use?
json-server is open source, so it can be self-hosted and used at no licence cost. It is released under the MIT licence. Pricing changes often, so verify at source before relying on it.
Source: https://github.com/pricing
What platforms does json-server support?
json-server supports the web and a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.
Source: https://github.com/pricing
Can json-server be self-hosted?
Yes. json-server can be deployed self-hosted, so it does not have to run on the vendor's infrastructure.
Source: https://github.com/pricing
Is json-server open source?
Yes. json-server is published under the MIT licence, a permissive licence that generally allows commercial use and modification. Licence terms can change between releases, so verify against the repository for the version you intend to use.
json-server alternatives
Other api mocking we track, ranked by the same independent score.
- BeeceptorCreate and manage mock API servers for testing and developmentmedium · 74%
- Mockoonmedium · 72%
- Mock Service Worker (MSW)A reusable API mocking library that intercepts network requests for testing and development across JavaScript environmentshigh · 79%
- NockA Node.js library for mocking HTTP interactions in testsmedium · 67%
- WireMockAn open source tool for creating and testing mock APIslow · 17%
- Traffic ParrotEnables teams to mock external APIs and services locally during development and testingmedium · 72%
Compare json-server
Side by side against other api mocking, attribute by attribute, with a source on every value.
The vioscaleAI score: one lens on the evidence
Not user reviews and not a paid placement: a confidence-weighted blend of the independent signals below (adoption, activity, security posture, and more), which you can sort and re-weight yourself. Vendors can correct their listing but can never move their rank, and stars are weighted low as a vanity metric. It is one way to read the evidence for json-server, not the verdict.
| Signal | Score | Weight | Contribution | Evidence |
|---|---|---|---|---|
| Dependent projects | 82 | 0.08 | 6.6 | ✓ |
| Release cadence | 97 | 0.07 | 6.5 | ✓ |
| Stars | 92 | 0.03 | 3.0 | ✓ |
| Capabilities | 29 | 0.08 | 2.4 | ✓ |
| Security score | 36 | 0.05 | 1.9 | ✓ |
| Integrations | 0 | 0.05 | 0.0 | - |
| Development activity | 0 | 0.12 | 0.0 | - |
| Security posture | 0 | 0.09 | 0.0 | - |
| Package downloads | 0 | 0.17 | 0.0 | - |
| Developer Q&A activity | 0 | 0.08 | 0.0 | - |
Computed . Re-weight it by intent, or see the full method.
All data & sourcesshow ↓
Every value we hold, with its source, retrieval date, and confidence. This is the evidence behind the score: don't trust it, verify it.
Adoption
Content
| Attribute | Value | Evidence |
|---|---|---|
| Faq | 5 items | mediumsource · 2026-09-10 · 67% |
Features
| Attribute | Value | Evidence |
|---|---|---|
| Capabilities | Deployment: cli_binary · Open source: Yes · Mocking mode: static · Pricing model: open_source · Market segment: dev-tool | mediumsource · 2026-10-14 · 60% |
Language
| Attribute | Value | Evidence |
|---|---|---|
| Primary | JavaScript | highsource · 2026-10-14 · 90% |
License
| Attribute | Value | Evidence |
|---|---|---|
| Spdx | MIT | highsource · 2026-10-14 · 95% |
Pricing
Release
Security
| Attribute | Value | Evidence |
|---|---|---|
| Scorecard | 3.6 | highsource · 2026-10-14 · 90% |
| Vulnerabilities | Count: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=json-server&per_page=100 · Last 12m: 0 | highsource · 2026-10-14 · 90% |
| Trust center | https://github.com/security | mediumsource · 2026-10-14 · 60% |
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