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Mockfly

Freemium#12 of 26 in API Mocking Tools

Mockfly: A flexible API mocking service combining hosted endpoints, local serving, and dynamic responses. Ranked #12 of 26 in API Mocking Tools by our editors (7.9/10); pricing: Free plan; best for small teams wanting hosted mocks plus local CLI.

7.9/10Editor score
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Mockfly7.9 Visit Mockfly

At a glance

  • Editor score
    7.9 / 10
  • Pricing
    Free plan
  • Best for
    Small teams wanting hosted mocks plus local CLI
  • Free plan
    Yes
  • Paid from
    €15/mo
  • Dynamic responses
    Yes
  • Founded
    2023
  • Facts checked
    20 Sep 2026
Mockfly screenshot

  • Where it wins

    • Conditional matching across paths, queries, headers, and request bodies
    • OpenAPI, Swagger, Postman, and HAR support with automatic documentation
    • Hosted HTTPS endpoints plus offline local CLI and WebSocket mocking

  • Where it doesn't

    • Starter is limited to 500 requests per day, one project, and four endpoints
    • Advanced collaboration and administration begin on higher-priced plans
    • Custom domains with TLS are available only on the Pro plan

Our verdict on Mockfly

Mockfly is a browser-based API mocking service for developers and frontend teams that need testable endpoints before production APIs are available. It supports hosted HTTPS mock endpoints, configurable methods and responses, status codes, headers, delays, conditional rules, and dynamic routes. A local CLI server provides an offline option, while WebSocket mocking extends the service beyond standard REST workflows.

The pricing structure starts with a free Starter plan providing 500 requests per day, one project, four endpoints, and two responses per endpoint. Pro costs €15 per month and adds unlimited requests, projects, endpoints, and responses per endpoint, along with AI-generated mock API JSON and a custom domain with TLS. Team costs €49 per month and includes five seats, everything in Pro, priority support, and a centralized team invoice. Company costs €199 per month and adds OpenAPI or Postman import setup, centralized billing, custom seats and integrations, and an SLA. The plans make the free tier suitable for small, bounded projects, while paid tiers remove usage and project limits and add team controls.

Mockfly’s main strength is the depth of its response modeling. Conditional rules can inspect paths, queries, headers, and bodies; Faker.js supports dynamic data templating; and request logs and automatic API documentation help teams inspect and share mock behavior. OpenAPI and Swagger imports can reduce manual setup, with Postman, HAR, a Chrome Extension, WebSocket support, and a public REST API broadening its ecosystem fit. Choose Mockfly when hosted HTTPS mocks, local CLI execution, dynamic responses, or WebSocket support matter together. Teams needing only a small number of fixed endpoints may find Starter sufficient, while organizations seeking broader administration should consider the Team or Company plans.

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Mockfly pricing

Plans Free planFreemium A usable free plan; paid tiers unlock the limits above. Prices checked 20 Sep 2026.
See plans on mockfly.dev

All 4 Mockfly plans and prices →

Mockfly fact sheet

Free planYes
Paid from€15/mo
Dynamic responsesYes
OpenAPI importYes
Request matchingNot verified
Mock data generationYes
Local deploymentYes
Supported protocolsREST, WebSocket
DeploymentCloud, Browser extension
PlatformsWeb, Chrome extension
SupportEmail, Docs
Built forSolo, Small business, Mid-market, Enterprise (editorial estimate)
Integrations7 integrations: OpenAPI, Swagger, Postman, HAR, Chrome Extension, WebSocket …
PricingFree plan (source)
Websitemockfly.dev
Facts checked20 Sep 2026

Mockfly integrations

Mockfly lists 7 integrations on its own site.

  • OpenAPI
  • Swagger
  • Postman
  • HAR
  • Chrome Extension
  • WebSocket
  • Public REST API

Alternatives to Mockfly

See all Mockfly alternatives →

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Featured on iTechGuides

Featured on iTechGuides — Mockfly 7.9/10

Mockfly is listed in our API Mocking Tools directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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