json-server

5.6easy start · #22 of 27
in API Mocking Tools

Runs on api, self-hosted.

json-server is ranked #22 of 27 in API mocking tools on The Geeks Club. It runs on API, Self-hosted. There is a free plan.

json-server plans and pricing

json-server Free MIT-licensed open-source package · runs locally from a JSON or JSON5 file github.com · 4 Oct 2026

WireMock 0 of 4 in the starter kit Lesson 17.8 WireMock 0 of 4 in the starter kit Lesson 27.6 Microcks 0 of 4 in the starter kit Lesson 37.4 Mockzilla 0 of 4 in the starter kit Lesson 47.4 Parasoft SOAtest 0 of 4 in the starter kit Lesson 57.3 Knockout API 0 of 4 in the starter kit Lesson 67.2

Purpose: json-server creates a fake REST API with zero coding for testing and prototyping.
Data files: It reads a db.json or db.json5 file and starts a local server at http://localhost:3000.
HTTP routes: Array resources support GET, POST, PUT, PATCH and DELETE routes, while object resources support GET, PUT and PATCH.
Filtering: Query filters support comparison operators, membership, case-insensitive string matching and nested fields.
Sorting and pagination: Requests can sort results and paginate them with _page and _per_page; the documented default page size is 10.
Relationships: The _embed query parameter includes related resources, and DELETE supports a _dependent parameter for dependents.
Static files: It serves files from ./public by default and can serve additional directories passed with -s.
Install and runtime: The package is installed with npm, and its package metadata specifies Node.js >=22.12.0.
License: The repository is licensed under the MIT License.
Version status: The README identifies the displayed v1 documentation as beta and warns users to expect breaking changes.
Compatibility: The README describes the tool as a fake REST API; its repository topics include frontend, mock, REST and test.
Security and compliance: The opened project pages provide no security or compliance certification statements.
Price from: Free

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