Cloud simulators for legacy banking APIs – test integrations without the mainframe.
Enterprise fintech teams struggle to integrate modern APIs into legacy banking systems, causing significant delays in product rollouts.
LegacyMock creates instant, accurate mock servers mimicking legacy banking endpoints based on protocol docs or traffic captures. Fintech teams spin up isolated sandboxes for parallel dev/testing, catching issues pre-prod without risking legacy systems. Export mocks to CI/CD for automated regression testing.
Enterprise fintech teams building or updating banking products
Protocol-aware mocks with stateful sessions, not generic API mockers.
supportive
Import legacy specs (ISO 8583, FIX) or HAR files to build mocks.
Generate and launch stateful mock endpoints instantly.
Define response scenarios, delays, and error injections.
Integrated UI to run API tests against mocks.
Proxy real traffic to learn and refine mocks.
Export mock as Docker image for pipelines.
Collaborate on mocks with team access.
Replay captured traffic for load testing.
| Column | Type | Nullable |
|---|---|---|
| id | uuid | No |
| text | No |
Relationships:
| Column | Type | Nullable |
|---|---|---|
| id | uuid | No |
| user_id | uuid | No |
| name | text | No |
Relationships:
| Column | Type | Nullable |
|---|---|---|
| id | uuid | No |
| project_id | uuid | No |
| endpoint | text | No |
| scenarios_json | text | No |
| active | bool | No |
Relationships:
| Column | Type | Nullable |
|---|---|---|
| id | uuid | No |
| mock_id | uuid | No |
| results_json | text | No |
| timestamp | timestamp | No |
Relationships:
/api/projectsCreate project
/api/mocksCreate mock from import
/api/mocks/:id/run-testExecute test suite
/api/test-runs/:mockIdList test results
1k req/mo
50k req/mo
None
| Month | Users | Conversion | MRR | ARR |
|---|---|---|---|---|
| Month 1 | 60 | 3% | $54 | $648 |
| Month 6 | 250 | 7% | $525 | $6,300 |
Accelerate dev cycles with accurate, cloud-based simulators.
Share demo video on Twitter/X fintech threads; Join Discord communities for banking devs; Run $100 LinkedIn ads targeting 'fintech integration' keywords.
General mocking
No banking protocols
Fintech-specific with state
Growing library of user-submitted protocol mocks creating network effects.
DevOps shift in fintech demands fast testing amid talent shortages.
Mock fidelity
User feedback loops
Build delays
Modular dev
Low conversions
Freemium ramps
Success: 80% interest
Success: 3 paying
Success: 100 users
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