Embed ACH Validation & Generation in Your SaaS Platform
Your customers want to send ACH from inside your product. Add white-label NACHA validation today — and white-label file generation on the same API near-term — without becoming an ACH spec expert or paying enterprise treasury pricing.
Embed-priced for vertical SaaS. Same API, same key, same response shape across both paths.
Your Customers Are Asking For ACH. Building It Yourself Is a Trap.
Three paths usually fail. Here's why.
Building It In-House Burns Years
NACHA validation alone is hundreds of edge cases — balanced files, prenotes, return codes, NOC handling, SEC code rules. Generation adds bank-specific formatting quirks. That's a multi-quarter project before your first customer benefits.
Stripe ACH Rents Your Customer
It's simple to integrate, but you hand the payment relationship and the data to a third party. You can't offer NACHA file generation, can't support customers who use their own bank, and can't price it as a premium feature in your own product.
Treasury APIs Are Priced for Banks
Modern Treasury and Dwolla can do the job — if you're a fintech with an enterprise budget. Vertical SaaS embedding ACH as one feature among many shouldn't pay six-figure platform fees just to ship it.
Two Integration Paths, One API
Validation is in production today. White-label generation is the next major release on the same API surface — same auth, same key, same response shape.
Validation API
Drop our NACHA validator into your product. Your users upload or generate an ACH file in your UI; you call our API and get a structured list of errors with severity, category, and line location.
- Two endpoints: JSON body and raw file upload
- Single
X-API-Keyheader — no OAuth dance - RFC 7807 problem-detail error responses
- OpenAPI 3.1 spec, importable into Postman or your SDK generator
- Per-key rate limits and daily usage metering
File Generation API
Send raw payment data — recipients, amounts, effective date — and receive a NACHA-compliant ACH file in response. Built for platforms that want to keep the customer relationship and the bank-of-record arrangement in their own product.
- Same
X-API-Keyheader, same auth model - Same RFC 7807 error model your team already integrated
- White-label by design — FiSTWorks branding never appears
- Validation customers get first access
Want to compare the embed model against the API? Our browser-side validator widget keeps file data on the client — useful when your platform handles sensitive customer files and you want a narrow vendor scope. Mention it on the discovery call.
Security & Compliance By Path
What your security team will ask — answered up front, by integration path.
| Validation API (today) | Generation API (roadmap) | |
|---|---|---|
| Where does ACH file data flow? | Through our API for inspection only — not retained | Through our API; generated file returned in the response |
| Encryption at rest | Always Encrypted (AES-256) on sensitive fields | Always Encrypted (AES-256) on sensitive fields |
| Encryption in transit | TLS 1.2+ | TLS 1.2+ |
| Authentication | X-API-Key header, key rotation supported |
Same X-API-Key header, same key |
| SOC 2 posture | Type 1 targeted Q4 2026 | Type 1 targeted Q4 2026 |
| Audit trail | Per-key usage metering and request logs | Per-key usage metering and request logs |
| White-label | You own the UI | You own the UI & the file |
SOC 2 Type 1 is an active roadmap item. Until then, we're happy to share our SIG questionnaire response and architecture diagrams to support interim vendor approval at your platform.
The Economics for Your Platform
Illustrative example for a vertical SaaS — payroll or property management — with 300 customers running ACH.
Engineering Time Avoided
Building NACHA validation in-house is 2–3 senior engineers for 6–9 months, plus ongoing edge-case maintenance every NACHA rule update. Embedding the API turns months of work into days — and the maintenance burden moves off your roadmap.
Avoided Customer Returns
300 customers × 3 files/mo × 2% return rate × $15 avg return cost = ~$270/mo of returns avoided across your customer base — plus the support tickets and reputation hits that come with them.
New Premium Tier Revenue
Charge $20/mo per customer for an "ACH Pro" tier with validation and (soon) generation = $6,000/mo new recurring revenue at 300 customers, compounding as you onboard more. Your margin, your pricing.
Your Cost
Embed pricing starts in the low four figures per month with volume-based rates and pilot terms for early integrations — orders of magnitude below treasury-API platform fees. Final scoping happens on the discovery call.
Illustrative scenario. Actual numbers vary by customer base, file volume, and how aggressively you price the premium tier — we'll model the ROI against your real product on the first call.
Battle-Tested in Production Every Day
FiSTWorks also serves end-customer businesses directly — not enterprise software that exists only in demos.
Property managers, payroll bureaus, bookkeepers, and small manufacturers use FiSTWorks every day to generate NACHA-compliant files and transmit them to their banks. The same validation engine and file builder you'll embed in your product are tested against real ACH files in production — not from a demo environment.
When you embed FiSTWorks in your platform, you're shipping an engine that already has paying users, real bank traffic, and battle-scarred edge-case coverage — not a vendor's roadmap.
Security Posture Today
What's in place now, and where the SOC 2 roadmap is headed.
Always Encrypted
AES-256 on sensitive fields — invisible to database administrators.
Clerk OAuth + MFA
Passwordless authentication. Optional MFA enforcement at the org level.
Azure Infrastructure
SOC 2 Type II, ISO 27001, and PCI DSS certified hosting with Azure Front Door WAF.
Audit Trail
Every action logged immutably — who did what, and when.
SOC 2 Type 1 Roadmap
Targeted Q4 2026. Security policies drafted; Type 2 observation to follow.
For platforms where vendor SOC 2 is a gate, we'll share our SIG questionnaire response, architecture diagrams, and (when available) a penetration test report to support interim vendor approval. We're also open to a mutual NDA for deeper review.
Let's Scope Your ACH Embed
First call is 20 minutes. We learn what your customers are asking for, share what we've seen work at other vertical SaaS platforms, and let you decide if a pilot is worth scoping. No pressure.
Start the ConversationEmbed pricing starts in the low four figures per month with volume-based rates. Pilot terms available for early integrations — this is a favorable moment to scope one.