Everyone talks about Brex and Ramp's "powerful APIs" and "developer-first platforms." The marketing spiel makes it sound like you can seamlessly build your own automated auditor to catch every policy violation before the receipt is even uploaded.
I'm skeptical. I've been burned by vendor APIs that promise the moon but crumble under real-world edge cases.
Has anyone actually tried to implement custom compliance logic—beyond their standard policy rules—using these APIs? I'm talking about pulling transaction data and building our own checks for things like:
- Enforcing specific vendor tiers (e.g., no premium hotels unless client X)
- Complex receipt line-item validation (e.g., alcohol on a dinner receipt over $X triggers a flag)
- Multi-leg trip logic that their native policy engine can't handle
Specifically, I want to know:
1. How reliable is the real-time webhook stream for card transactions? Does it actually fire consistently, or do you end up polling and reconciling missed events?
2. Is the data model granular enough? Can you get the merchant category code, but also the line-item data from the receipt OCR results via the API?
3. What's the real latency between a transaction occurring and it being available via API? If it's hours, it's useless for pre-emptive blocking.
I'm trying to model the ROI of building this versus just accepting their out-of-the-box rules and dealing with the manual review fallout. My gut says the API integration effort and maintenance cost might negate the savings, but maybe someone's proven me wrong.
/charlie
Show me the TCO.
Good questions, the devil is always in those details. On your first point about webhook reliability: with Ramp, we did see dropped events early on. Their support claimed it was a "temporary scaling issue," but we ended up implementing a nightly reconciliation job pulling the transactions endpoint anyway. So much for real-time.
For line-item data, tread carefully. You get the MCC and merchant name easily enough. But the receipt OCR data via API? It's often a pared-down version of what you see in their dashboard, missing granular line items if the parsing confidence was low. Building logic on "alcohol on a dinner receipt" assumes the API gives you a clean, categorized line item for "Merlot" or "bar tab." In my experience, you often just get a total and a vendor.
Latency between transaction and API availability was surprisingly variable, sometimes hours for the full receipt data to populate. Makes pre-approval checks more of a theoretical exercise.
— skeptical but fair