Pharmacy Claims API Comparison: Starlight vs the Rest
If you need to submit pharmacy claims programmatically, you have three broad options: direct switch integration, a PBM-focused platform like TransactRx, or a developer-first API like Starlight. Each approach has different tradeoffs in setup time, cost, flexibility, and developer experience. This guide breaks them down honestly.
Option 1: Traditional pharmacy switches
Companies like RelayHealth (Change Healthcare/Optum), Rx Linc, and SSI Group are the backbone of pharmacy claim routing. They've been doing this for 30+ years.
Best for:
- • Established pharmacy chains with dedicated engineering teams
- • Organizations that already have NCPDP expertise in-house
- • High-volume operations (50K+ claims/month) where per-claim cost matters most
- • Companies that need direct control over the entire claim lifecycle
Not ideal for:
- • Startups or small teams without NCPDP experience
- • Companies that need to ship quickly (MVP in weeks, not months)
- • Software vendors building claims as a feature (not the core product)
Option 2: TransactRx
TransactRx operates as a cloud-based claims clearinghouse and PBM platform. They offer a REST API for eligibility and claims, primarily targeting discount Rx card programs, copay assistance programs, and private-label PBMs.
Getting started with TransactRx is not straightforward. There is no public signup, no sandbox you can try, and no documentation you can read before committing. You start by contacting their sales team, then go through a qualification process where they evaluate whether your use case fits their platform. From there, expect contract negotiation, onboarding calls, and a multi-week integration timeline before you can submit your first test claim. For companies that need to move fast or just want to evaluate the technology, this creates a significant barrier to entry.
Best for:
- • Companies building or operating a PBM
- • Discount card programs that need full adjudication capabilities
- • Organizations that want a turnkey PBM platform, not just a claims API
Not ideal for:
- • Developers who want to evaluate the API before committing to a sales process
- • Startups that need to move fast and can't wait weeks for access
- • POS/PMS vendors who just need claims routing (not PBM functionality)
- • Teams that prefer self-serve, documentation-first integration
- • Anyone who wants to know pricing before getting on a call
Option 3: Starlight API
Starlight is the first developer-first JSON REST API purpose-built for NCPDP pharmacy claims. The design philosophy: make NCPDP D.0 feel like any other modern API.
Best for:
- • Startups building pharmacy-adjacent products (discount cards, eligibility tools, POS systems)
- • Developers who want to integrate claims without learning NCPDP
- • Teams that need to ship an MVP quickly and iterate
- • Companies without a pharmacy license (Instant Access tier)
- • Anyone who values self-serve documentation and transparent pricing
Not ideal for:
- • Organizations that need to operate as a PBM (TransactRx is more appropriate)
- • Very high-volume operations (100K+ claims/month) where $0.05/claim switch pricing is critical (though Starlight's enterprise tier starts at $0.10)
Side-by-side comparison
What about Stedi?
Stedi is often mentioned in the same breath as modern healthcare APIs. They're excellent: developer-first, great documentation, transparent pricing. But there's an important distinction:
Stedi focuses on medical claims (X12 837/835) and eligibility (X12 270/271). These are the ANSI X12 standards used by hospitals, physicians, and medical facilities. Pharmacy claims use a completely different standard: NCPDP Telecommunication D.0. Stedi does not process NCPDP transactions. If you need pharmacy claims (B1/B2/E1), Stedi isn't the right tool. If you need medical claims, Stedi is excellent and Starlight isn't the right tool.
Making the decision
The right choice depends on where you are and what you're building:
→ Start with Starlight. Ship your MVP in days, not months. Upgrade to Growth tier when volume warrants it.
→ Starlight as middleware eliminates the NCPDP learning curve. Your engineers focus on POS features, not protocol encoding.
→ TransactRx is purpose-built for this. You need adjudication capabilities, not just claims routing.
→ Direct switch integration gives you the lowest per-claim cost and maximum control. You have the team to handle it.
→ Start with Starlight's free sandbox. Test the API, understand the data model, then decide your long-term architecture.
Related guides
- • How to Submit Pharmacy Claims via API — step-by-step first claim tutorial
- • Pharmacy Claims Processing Workflow — understand the full claim lifecycle
- • Pharmacy Switch Integration Guide — what traditional switch setup looks like
- • Insurance Eligibility Verification API — check coverage before billing
Try the API, no commitment needed
Free sandbox, public docs, no sales call. Submit your first test claim in minutes and see if Starlight is the right fit.