FOR ENGINEERS

Stop testing financial integrations against nothing.

You're wiring up QuickBooks, Stripe, Plaid. There's nothing realistic to test against — so your tests are thin, flaky, or skipped.

SynthesizingMeridian SaaS Inc.

seed fx_a7f3c1

Initializing company DNA…▊
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The problem

Real sandboxes are expensive and disconnected — a NetSuite sandbox runs $20k+ and still doesn't talk to your Stripe fixtures. Hand-rolled JSON drifts the moment the schema changes. Recorded fixtures rot. So integration tests end up asserting against data that doesn't reconcile, and CI goes red for reasons that aren't real.

What Fictix gives you

A whole synthetic company — founders, customers, vendors, up to two years of correlated books — exposed behind native-shaped API endpoints for 20 services. Change the base URL and send your Fictix project key (X-API-Key). Responses follow each vendor's shape, so most client code works with little or no change. Pin a saved company by ID and every run reads exactly the same data, so a failing test means a real bug, not noise.

Native-shaped APIlittle to adapt

GET /v3/company/3f2a/query?query=SELECT * FROM Invoice
Base: api.fictix.ai/api/v1/orgs/acme/native/qbo   ← new base URL
X-API-Key: ••••••••   ← project key
200 OK · application/json
{ "QueryResponse": { "Invoice": [ {…}, {…} ],
    "startPosition": 1, "maxResults": 3247 } }

Same response shape. Change the base URL and send your Fictix project key.

Accounting

QuickBooks

Xero

NetSuite

Payments

Stripe

Square

Banking

Plaid

Mercury*

Cards / AP

Ramp

Brex*

BILL

Payroll / CRM

Gusto

HubSpot

Shopify

Comms / Ops

Slack

ASAsana

ATAirtable

Mail / Docs

Gmail*

Outlook

GDGoogle Drive

XLExcel

20 native adapters · approximate fidelity · * read-only preview · books tie out across 7

It fits the way you already work

Everything runs over the REST API with your project key, so the company drops into local dev and CI as plain HTTP calls. A packaged CLI is coming; an MCP server is in early access. Webhooks signed with X-Fictix-Signature let you test event-driven flows (Developer plan and above). Advance the simulation clock to test month-end, renewals, or churn on demand.

Start with a snapshot. Make it live when you're ready.

Generate your first company →

Questions

Do I have to write an adapter for each service?

Usually not. Fictix exposes endpoints shaped like each real service's API (QuickBooks looks like QuickBooks, Stripe like Stripe). Change the base URL and send your Fictix project key (X-API-Key); most client code works with little or no change.

How does it stop flaky tests?

Save the company and it gets a short ID. Fictix stores it, so every run reads exactly the same transactions and IDs, and tests assert against stable data.

Can it run in CI?

Yes, over the REST API. Store your project key as a CI secret, point tests at the company's API base URL with X-API-Key, advance the clock if a test needs it, and read precision and recall from a test run.

→ Deterministic test data that kills flaky CI → A sandbox alternative under $20k → What is a deterministic seed?