NOW IN BETA — Join our early access program
NOW IN BETA — Join our early access program
Nintei-X – The Complete FIX Automated Testing Platform
Multi-session connectivity. Automated regression. Real-time FIX analysis. Built for electronic trading — on Linux and Windows, in GUI or CLI mode.
The next generation of Nintei — trusted in capital markets since 2012, reimagined for today’s trading infrastructure.
Currently available as a beta release — be among the first firms to put it to work.
A Proven FIX Testing Tool — Now Rebuilt for Modern Trading
Nintei has been serving trading firms, brokers, and exchanges since 2012 as a dependable FIX automated testing and simulation tool. Today, we are relaunching it as Nintei-X — engineered from the ground up to match the scale, speed, and complexity of modern electronic trading environments.
Nintei-X is currently available as a beta release. We are actively onboarding a select group of early-access firms whose feedback will directly shape the General Availability build. Beta participants get hands-on access to every feature, direct engagement with our engineering team, and the opportunity to influence the product roadmap.
Nintei-X gives QA teams, trading technology leads, and exchange connectivity engineers a single platform to validate FIX connectivity, simulate message flows, run regression cycles, and stress-test trading platforms — without writing a single line of code.
Built for:
Buy-Side Firms
Validate DMA, algo, and broker connectivity
Sell-Side Brokers
Certify routing rules, risk checks, and order handling
Exchanges
Certify member firm connections and engine upgrades
Technology Vendors & OMS/EMS Providers
Prove stability before client rollout
What’s New in Nintei-X
Six major upgrades that make Nintei-X a true enterprise-grade FIX testing platform.
Multi-Session Connectivity
Connect and test multiple FIX venues simultaneously from a single interface. Each session runs independently with its own logs, settings, and test suite — perfect for firms that certify across several counterparties at once.
Repeating Group Support
Full authoring support for FIX repeating groups in test cases. Add, edit, and validate any NoXxx group — NoLegs, NoAllocs, NoPartyIDs, NoOrders, and more. Repeating groups are auto-detected when you import from captured logs.
Custom Dictionary Support
Upload your proprietary FIX dictionary with custom tags and message types. Used consistently across session setup, test case authoring, and the inline FIX Analyzer — so your house extensions are first-class citizens in every workflow.
Cross-Platform — Linux & Windows
Native support on both Linux and Windows, with no dependency conflicts. Deploy Nintei-X anywhere in your infrastructure — developer workstations, QA servers, or containerized CI runners.
Command-Line / Batch Mode
Run full test suites without the GUI. Schedule overnight regression cycles, integrate directly into CI/CD pipelines, and drive execution with simple command switches (-a -b -l -i -p). Fully scriptable, fully automated.
Inline FIX Analyzer
Click any live FIX message to instantly decode it — tag names, values, and full descriptions including repeating groups — right inside the session view. No more copy-paste into external parsers.
Everything You Expect from a Professional FIX Testing Tool
Nintei-X retains every capability that made Nintei trusted in capital markets — refined and expanded.
Dynamic Test Case Creation
Build test cases that adapt in real time — inject live inputs, parameterize values, and respond to changes in business logic or updated FIX specifications without rewriting scenarios. Keep your test library relevant as your trading workflows evolve, and eliminate the maintenance overhead of brittle, hard-coded scripts.
All FIX Protocol Versions
Complete support for FIX 4.0, 4.1, 4.2, 4.3, 4.4, 5.0, 5.0 SP1, 5.0 SP2, plus custom versions and all major asset classes.
Automated Regression & QA
Catch issues in the development phase — long before production rollout. Run the same test suite across every release, every environment, every time.
Scenario Builder (No-Code)
Define test scenarios through a business-friendly interface. No scripting or programming expertise required — QA analysts and business users can author tests directly.
Positive & Negative Validation
Validate both success paths and failure conditions. Thorough outcome reporting makes every edge case visible.
Performance & Stress Testing
Send bulk orders and messages to verify how your trading platform holds up under load. Ideal for capacity planning and peak-day preparation.
Build from Existing Logs
Turn captured FIX log files into reusable test cases in minutes. Replay production scenarios safely in your test environment.
Custom Tags & Messages
Full support for custom FIX tags and non-standard message types — essential for proprietary trading workflows.
Detailed PDF Reports
Auto-generated, timestamped reports suitable for internal audits, regulatory evidence, and counterparty certification records.
Scenario Refactoring
Bulk-refactor test suites at scale — rapid environment migration (UAT → PROD, client A → client B) without re-authoring.
Environmental Overrides
Change test parameters on the fly — SenderCompID, TargetCompID, session settings — without modifying the original test cases.
Manual Testing vs. Nintei-X Automation — The Measurable Difference
Every dimension that matters for FIX QA — better, faster, cheaper.
Firms switching from manual or script-heavy FIX testing typically see dramatic reductions in QA effort and release cycle time — while improving test coverage and audit readiness.
Why Trading Firms Choose Nintei-X
Faster Time to Market
Automated regression cycles shrink testing windows from days to hours. Ship FIX changes with confidence.
Lower QA Costs
Reduce dependency on large manual QA teams without compromising test coverage or accuracy.
Audit-Ready Reporting
Every run produces timestamped, detailed PDF reports suitable for internal audit, regulatory review, and counterparty evidence.
No Specialist Skills Needed
Business analysts, QA testers, and trading operations staff can author and run tests — no FIX programming required.
Built by Capital Markets Practitioners
Designed by engineers who have lived the FIX connectivity problem — at buy-side firms, sell-side brokers, exchanges, and vendors.
Scales with You
From a single certification session to hundreds of concurrent venue connections — Nintei-X grows with your infrastructure.
Built for Every Player in the FIX Ecosystem
NINTEI was built by industry professionals to meet the real-world challenges of electronic trading. It’s designed to:
Buy-Side Firms
Certify new broker connections, validate execution algos, and regression-test DMA flows before production cutover.
Sell-Side Brokers
Validate order routing, pre-trade risk checks, smart order routing logic, and client FIX onboarding scenarios.
Exchanges
Certify member firm FIX connections, test matching engine upgrades, and run conformance testing at scale.
Technology Vendors & OMS/EMS Providers
Prove platform stability and FIX conformance before shipping to clients — and maintain quality through every release.
Common Nintei-X Use Cases
- Client FIX Onboarding & Certification — run standardized certification scripts for every new counterparty
- Dynamic Test Case Authoring — build parameter-driven test cases that adapt to live inputs, spec changes, and different trading workflows without rewrites
- Nightly Regression Runs — schedule CLI-mode test suites to execute overnight against UAT environments
- CI/CD Integration — trigger FIX regression suites on every commit, pull request, or release candidate build
- Exchange Engine Upgrade Validation — verify behavior across protocol versions before production cutover
- Multi-Venue Smart Order Router Testing — validate routing decisions across simultaneous FIX sessions
- Log-Based Incident Reproduction — rebuild test cases from production logs to diagnose and fix issues safely
- Load & Capacity Planning — simulate peak-day order volumes to prove platform headroom
- Algo Behavior Verification — validate child order generation, cancel/replace sequences, and edge-case responses
Technical Highlights
| Operating Systems | Linux (major distributions) and Windows |
| FIX Versions | 4.0 through 5.0 SP2, plus custom/proprietary versions |
| Session Management | Multi-session, multi-venue, independent logging per session |
| Quick Onboarding | Faster adapter integration of clients and counterparties |
| Deployment Modes | GUI, CLI / Batch, CI/CD pipeline integration |
| Reporting | Auto-generated timestamped PDF reports |
| Extensibility | Custom FIX dictionaries, custom tags, non-standard messages |
| Asset Class Coverage | Equities, Futures, Options, FX, Fixed Income, and more |
FROM NINTEI TO NINTEI-X
13+ Years of FIX Testing Expertise — Reimagined
Since 2012, Nintei has helped trading firms, brokers, and exchanges test FIX connectivity with confidence. Over the years our users asked for more — more sessions, richer protocol support, deeper automation, and cleaner CI/CD integration. Nintei-X is our answer.
We rebuilt the platform around a new session architecture, added full support for repeating groups and custom dictionaries, delivered a command-line mode for automation, and made it run natively on both Linux and Windows. The simplicity and usability that made Nintei trusted remain — everything else is new.
Join the Nintei-X Beta Program
Get early access. Shape the roadmap. Lock in preferred terms.
Nintei-X is currently a beta release, and we are working closely with a select group of early-adopter firms before General Availability. Beta participation is ideal for trading firms, brokers, exchanges, and vendors who want to:
- Get hands-on early with a next-generation FIX testing platform
- Influence the product — your feedback directly informs feature priorities, UX refinements, and protocol coverage
- Work directly with our engineers — dedicated support channel for beta users, faster issue resolution, and deeper technical collaboration
- Lock in preferred terms — early-access pricing and licensing advantages carried forward into the GA release
What to Expect During Beta
- Full access to all Nintei-X features documented on this page
- Regular build updates as new capabilities land
- Direct feedback loop with the Nintei-X product team
- As with any beta, some edges are still being polished — your input helps us find and fix them faster
Frequently Asked Questions (FAQs)
What is Nintei-X?
Nintei-X is FIXSOL’s next-generation FIX automated testing and simulation platform. It helps buy-side, sell-side, exchange, and vendor teams validate FIX connectivity, run regression tests, and stress-test trading platforms — through a GUI or the command line.
How is Nintei-X different from Nintei?
Nintei-X adds multi-session connectivity, full FIX repeating group support, custom dictionary uploads, native Linux and Windows support, a command-line / batch mode for CI/CD, and an inline FIX Analyzer — while keeping the scenario builder, no-code test authoring, and reporting that made Nintei trusted since 2012.
Does Nintei-X support custom FIX tags and messages?
Yes. Upload your proprietary FIX dictionary and custom tags are recognized consistently across session setup, test case authoring, and the FIX Analyzer.
Can Nintei-X integrate with our CI/CD pipeline?
Yes. Nintei-X offers a full command-line / batch mode with switches for automated runs, making it easy to trigger test suites from Jenkins, GitLab CI, GitHub Actions, or any other pipeline tool.
Which FIX protocol versions are supported?
FIX 4.0, 4.1, 4.2, 4.3, 4.4, 5.0, 5.0 SP1, 5.0 SP2, plus custom and proprietary versions.
Do I need programming skills to use Nintei-X?
No. The scenario builder is designed for business analysts and QA testers. No scripting or coding is required to author, run, or analyze test cases.
What does “dynamic test case creation” mean in Nintei-X?
It means your test cases adapt to real-time inputs and changing business logic rather than being hard-coded. You can parameterize values, respond to updated FIX specifications, and reuse scenarios across environments without rewriting them — dramatically reducing test maintenance effort as your trading workflows evolve.
Can I build test cases from existing FIX logs?
Yes. Import captured FIX log files and Nintei-X will auto-detect messages and repeating groups, letting you convert them into reusable test cases.
Is Nintei-X available on Linux?
Yes. Nintei-X runs natively on both Linux and Windows.
Is Nintei-X production-ready?
Nintei-X is currently a beta release. All features listed on this page are functional and available to beta participants. We are actively refining stability, performance, and UX based on real-world feedback from early-access firms before the General Availability launch. Beta users work with a dedicated engineering contact to resolve issues quickly.
What does beta participation involve?
Beta users get full access to Nintei-X, direct support from our product team, regular build updates, and the ability to shape the feature roadmap. In return, we ask for feedback on what works, what doesn’t, and what’s missing. There are no hidden obligations — firms can evaluate Nintei-X in their own environments at their own pace.
What happens to beta users after General Availability?
Beta participants carry forward preferred licensing terms and receive priority onboarding support when Nintei-X reaches GA.
Be Among the First to Run on Nintei-X
Nintei-X is in beta and we are actively onboarding early-access firms. Book a live demo with our FIX testing specialists — we’ll walk through your specific workflow (multi-venue certification, CI/CD regression, exchange conformance, or whatever matters most to your team) and discuss how to get your firm onto the beta program.