Mockfly

Web · Linux · Self-hosted · API · Extension · paid plans from €15/mo

Freedom report

Two barsScore 6.5

Free tierA free tier is on its own pricing page
Open codeNo open-source code on record
Runs widely2 of 6 device platforms
DocumentedPlans, terms and facts published

Mockfly is ranked #5 of 27 in API mocking tools on Freedom251. It runs on API, Browser extension, Linux, Self-hosted, Web. There is a free plan. Paid plans start at €15/mo.

Mockfly plans and pricing

All plans

Starter Free 0€ per month 500 requests per day · 1 project · 4 endpoints · 2 responses per endpoint mockfly.dev · 29 Sept 2026

Pro €15/mo 15€ per month Unlimited requests, projects, endpoints and responses per endpoint · custom domain · AI generation · support mockfly.dev · 29 Sept 2026

Team €49/mo 49€ per month · 5 seats Everything in Pro · 5 seats included · 9€ a month per extra seat · priority support mockfly.dev · 29 Sept 2026

Company €199/mo From 199€ per month Everything in Team · setup assistance · custom seats, integrations and SLA mockfly.dev · 29 Sept 2026

Compared on API mocking tools

Free plan: Yes
Dynamic responses: Yes
OpenAPI import: Yes
Mock data generation: Yes
Local deployment: Yes
Supported protocols: REST, WebSocket

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The record

Purpose: Mockfly creates hosted mock REST API endpoints so teams can build and test before a backend is ready.
Responses: Each endpoint can have multiple responses selected by conditional rules based on incoming requests.
Data formats: Endpoints can return JSON, XML, or files such as PDF and CSV.
Data generation: Mockfly supports Faker.js templates and AI-generated JSON payloads.
Imports: Mockfly can import OpenAPI, Swagger, Postman collections, and HAR captures.
Integrations: The Chrome extension captures browser requests and adds selected endpoints to a Mockfly project.
Offline use: The mockfly-cli npm package can pull projects and serve them locally without an internet connection.
Automation: A public REST API and an MCP server can be used to create and edit mocks programmatically.
Team features: Teams can share and edit mocks, inspect request logs, and view response body history.
Security and data: Mockfly says it stores mock definitions and project request logs to run the service, does not sell that data, and does not set tracking cookies.
Support: The maker says users can email the developers directly in English or Spanish.
Intended users: Mockfly describes its users as frontend, backend, mobile, QA, and testing engineers who need shared mock APIs.
Notable free limit: The Starter plan is limited to 500 requests per day, one project, four endpoints, and two responses per endpoint.
Founded: 2023
Price from: €15/mo

Where it ranks on Freedom251

Best API Mocking Tools in 2026#5 of 27

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Sources

mockfly.dev/about/· checked 29 Sept 2026
mockfly.dev/for-teams/· checked 29 Sept 2026
mockfly.dev/docs/chrome-extension/· checked 29 Sept 2026
mockfly.dev· checked 29 Sept 2026
mockfly.dev/pricing/· checked 29 Sept 2026