How to Choose an Identity Verification API
Every identity verification vendor will tell you they are fast, accurate, and global. The useful question is not whether they make those claims — it is how you check them against your actual use case. Here is a practical checklist for evaluating an identity verification or KYC API.
1. Document coverage
Coverage is the single biggest differentiator. Ask:
- How many document types and countries are supported — and is the list of real, recognized templates, or a marketing number?
- Does it handle the documents your users actually carry, including regional and older versions?
- Does it read MRZ (passports), PDF417 barcodes (North American licenses), and the visual zone when neither is present?
A platform that covers 3,000+ document formats across 190+ countries will fail far less often on a real, messy applicant base than one tuned to a handful of countries.
2. The full check, or just OCR?
Reading data off a document is the easy part. A complete decision needs more:
- Document authentication — is the document genuine, or tampered / a known fake?
- Biometric face match — does the selfie match the document photo?
- Liveness — is the selfie a real, present person?
- AML / PEP screening — is this identity on a sanctions or watchlist?
Heads up
If a vendor only does OCR, you will end up stitching three more vendors together — with three audit trails. Prefer a platform that returns one verdict for the whole flow.
3. Integration shape
How the API fits your stack matters more than a demo:
- A clean REST API that returns structured JSON you can act on immediately.
- A no-code / hosted flow (like DocuPass) for teams that do not want to build a capture front-end.
- Official server SDKs for your language.
- Webhooks for asynchronous results.
4. Deployment & data residency
For regulated or privacy-sensitive industries, ask where the data goes:
- Is there an on-premise option for full data sovereignty?
- Can you control retention — including not storing anything at all?
- What region is data processed in?
5. Compliance & auditability
Finally, the questions procurement always asks:
- Is the infrastructure ISO 27001 certified?
- Does it map to GDPR, HIPAA, and identity-assurance frameworks like NIST IAL-2?
- Is there a tamper-evident audit trail you can replay for a regulator?
A simple way to compare
Run your own sample documents — including a few deliberately bad captures (blur, glare, partial frames) and a known fake — through each vendor's trial. The one that returns the right structured answer, fast, on your real-world inputs is the one to pick. Marketing accuracy figures are easy; passing your edge cases is not.
