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Mock Servers

Ready-to-go mock servers for 800+ real-world APIs. One credential. Realistic responses.

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The problem

Testing code that calls external APIs is painful:
  • Stripe needs test keys and a dashboard account
  • Shopify needs a partner account and test store
  • SendGrid needs API keys and domain verification
  • Loop Returns needs a merchant account and API access
Each service has different setup, different rate limits, different quirks. You just want to test your code. Instead, you’re managing credentials. 
# The credential hell you're escaping
STRIPE_TEST_KEY=sk_test_xxxxxxxxxxxxxxxxxxxx
STRIPE_WEBHOOK_SECRET=whsec_...
SHOPIFY_API_KEY=...
SHOPIFY_API_SECRET=...
SHOPIFY_ACCESS_TOKEN=shpat_...
SENDGRID_API_KEY=SG....
LOOP_API_KEY=loop_test_...
# ... 15 more services

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The solution

Mokra provides mock servers that behave like the real thing: 
# One key for everything
MOKRA_API_KEY=mk_live_...
  • One API key gives you access to Stripe, Shopify, SendGrid, and 800+ more
  • Realistic responses with the same structure, fields, and behavior as production
  • Stateful — create a payment, then refund it. The refund knows about the payment.
  • No rate limits — test as fast as you can code
  • Fresh state — no pollution from previous tests

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How it works

┌─────────────────────────────────────────────────────────────┐
│                     Your Code                                │
│  ┌─────────────────────────────────────────────────────┐    │
│  │  Stripe::Charge.create(amount: 5000, currency: "usd")│    │
│  └─────────────────────────────────────────────────────┘    │
└─────────────────────────────────────────────────────────────┘
                              │
                              ▼
┌─────────────────────────────────────────────────────────────┐
│                   Mokra Interceptor                          │
│                                                              │
│   https://api.stripe.com/v1/charges                          │
│                     ↓                                        │
│   https://api.mokra.ai/mock/stripe/v1/charges                │
│                                                              │
└─────────────────────────────────────────────────────────────┘
                              │
                              ▼
┌─────────────────────────────────────────────────────────────┐
│              Mokra Mock Server                               │
│                                                              │
│   Returns realistic response:                                │
│   {                                                          │
│     "id": "ch_mock_abc123",                                  │
│     "amount": 5000,                                          │
│     "currency": "usd",                                       │
│     "status": "succeeded"                                    │
│   }                                                          │
└─────────────────────────────────────────────────────────────┘
Your code makes normal API calls. Mokra intercepts them and returns realistic responses.

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Quick example

require 'mockworld'

Mockworld.configure do |config|
  config.api_key = ENV['MOKRA_API_KEY']
end

# Your code stays exactly the same
charge = Stripe::Charge.create(
  amount: 5000,
  currency: "usd",
  source: "tok_visa"
)

# Returns a realistic charge object:
# {
#   "id": "ch_mock_abc123",
#   "amount": 5000,
#   "currency": "usd",
#   "status": "succeeded",
#   ...
# }

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Who uses mock servers

  • Backend developers testing API integrations
  • Frontend developers building against API response shapes
  • AI systems that generate or test code
  • CI/CD pipelines that need reliable, fast tests
  • QA engineers testing integration flows

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Key features

One Credential

One API key for 800+ services. No more credential management.

Realistic Responses

Same structure, fields, and types as production APIs.

Stateful

Create resources, then reference them. State persists within a session.

No Rate Limits

Test as fast as you can code. No throttling.

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Next steps

Quickstart

Get realistic API responses in 2 minutes