Free mock API tools compared
APIMock, Beeceptor, Mockoon, MockAPI.io and Postman all let you mock an API for free. Their free tiers differ a lot in request limits, stateful data, failure testing and team access. Here's what each one gives you without paying.
Short answer: pick Mockoon if you want mocks on your own machine with no limits, APIMock if you want hosted mocks with persistent CRUD, failure testing and a team on the free tier, and Postman if your API already lives in Postman collections.
Free tier comparison table
| Free tier | APIMock | Beeceptor | Mockoon | MockAPI.io | Postman |
|---|---|---|---|---|---|
| Where mocks run | Hosted (HTTPS subdomain) | Hosted | Your machine (desktop app, CLI, Docker) | Hosted | Postman cloud |
| Free request allowance | 50,000 / month per workspace | 50 / day per endpoint | Unlimited (runs locally) | Not listed | Monthly quota, shown in your account |
| Stateful CRUD | Yes: resources with pagination, filters, seeds | 10 small objects | Yes: CRUD routes over JSON data | Yes: 1 project, 2 resources | No: returns saved examples |
| OpenAPI import | Yes | Yes (mock from specs) | Yes | Not listed | Yes |
| Failure testing | Fault injection: errors, rate limits, latency, broken payloads | Delays, timeouts, error responses | Latency; rule-based or random responses | Not listed | Fixed network delay |
| Request history | 7 days | Live only | Local logs | Not listed | Mock call log |
| Teams on the free tier | Yes: 3 workspaces, members & roles | No | No (Pro is paid) | No (collaboration is paid) | No: 1 user |
| MCP server for AI agents | Yes, on the free tier | Yes | Not listed | Not listed | Yes (official) |
| Paid plans from | None, it's free | $10 / month | €10 / license / month | $5 / month | $9 / month (billed yearly) |
APIMock: hosted, stateful, free
APIMock gives every workspace its own HTTPS subdomain, so a mock is reachable from a browser, a phone or CI the moment you create it. The free tier is the only tier: 50,000 mock requests a month per workspace, up to 3 workspaces with teammates and roles, and 7 days of request history.
Beyond static responses, you can declare resources that persist data behind real CRUD endpoints, and use fault injection to make mocks return errors, rate limits, slow responses or broken payloads. The MCP server lets Claude or Cursor build and inspect mocks for you.
Trade-offs: no custom domains yet, no self-hosted option, and no dedicated GraphQL, SOAP or gRPC tooling.
Beeceptor: many protocols, tight free limits
Beeceptor is a hosted mock server that also handles GraphQL, SOAP and gRPC. Its free tier allows 50 requests a day per endpoint and 3 mock rules, keeps 10 small objects for CRUD routes, and shows traffic live without history. Endpoints on the free tier are public, and unclaimed ones are deleted after 30 days.
Delay, timeout and error simulation is included on every plan. Private endpoints, more rules and team members start at $10 a month.
Mockoon: free and open source, on your machine
Mockoon is an MIT-licensed desktop app and CLI that runs mocks locally or in Docker, with no account and no request limits. It supports OpenAPI import and export, CRUD routes over JSON data, templating, latency and rule-based responses, and a proxy mode for routes you haven't mocked.
Trade-offs: a teammate or a phone can only reach your mock if you host it yourself. Hosted deployments, sync and collaboration are part of Mockoon Pro, at €10 per license per month.
MockAPI.io: quick CRUD prototypes
MockAPI.io generates REST resources with fake data and full CRUD. The free plan allows 1 project with 2 resources, without custom responses or collaboration. The paid plan, $5 a month or $35 a year, raises that to 20 projects and 50 resources.
It fits a small prototype well. It isn't aimed at testing failure paths or importing an existing API contract.
Postman: mocks next to your collections
Postman mock servers return the saved examples in a collection, so they work best when your API is already defined in Postman. They can simulate a fixed network delay, but they don't store data between requests.
The free plan is for one user, and mock calls count against a monthly quota shown in your account. Solo costs $9 a month and Team $19 per user a month, both billed yearly.
Which one should you use?
- Mocks only you need, offline, no limits: Mockoon.
- A hosted URL your team, phone or CI can hit, with data that persists and failures you can trigger: APIMock.
- GraphQL, SOAP or gRPC mocks: Beeceptor.
- A throwaway CRUD backend with fake data: MockAPI.io or APIMock.
- Your team already designs APIs in Postman: Postman.
Sources
Checked October 14, 2026. Plans change; check the vendor's page before you decide.
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