Know which APIs
developers can trust.
Independent quality intelligence for developer-first APIs — mapping documentation, auth clarity, error handling, SDK coverage, pricing transparency, and reliability signals.
API categories become
living territories.
Indexera scans developer-first API markets as classified terrain — tracking coverage, confidence, and freshness signals across identity, fintech, data, and AI APIs.
Authentication should feel like a marked route, not a locked gate.
Indexera evaluates whether APIs document auth flows clearly enough for developers to integrate without guessing.
Weak error handling breaks the path to production.
Indexera traces the route from documentation to production deployment, identifying where error handling, retry logic, and incident response break down.
SDK coverage is maintained infrastructure.
Indexera tracks official and community SDKs, update freshness, example quality, and package health for every indexed API.
Pricing transparency should be visible before the first API call.
Clear water means clear commercial terms. Indexera tracks what developers can see before signup — and what stays hidden until a sales conversation.
API trust reports, ranked by evidence.
Scores are earned from observable documentation, specs, auth guidance, SDK maintenance, transparency, and reliability signals.
| API | Grade | Docs | Auth | Errors | SDKs | Transp. | Reliab. | Status | Checked |
|---|---|---|---|---|---|---|---|---|---|
| Onfido | A- | 85 | 92 | 78 | 88 | 65 | 90 | Verified | 2d ago |
| Sumsub | B+ | 81 | 86 | 74 | 79 | 70 | 84 | Stable | 5d ago |
| Veriff | B+ | 83 | 84 | 76 | 81 | 68 | 86 | Stable | 3d ago |
| Persona | A | 91 | 93 | 88 | 86 | 78 | 89 | Verified | 1d ago |
| Trulioo | B | 76 | 80 | 69 | 73 | 61 | 82 | Review | 7d ago |
Scores are earned from evidence, not bought.
Indexera applies a transparent, public methodology to every API assessment. Every grade is backed by observable signals and documented evidence.
Public rubric
Every API is evaluated against the same documented criteria. Documentation quality, OpenAPI completeness, auth clarity, error examples, SDK availability, pricing transparency, and reliability signals.
Observable signals
Scores are derived from what developers can see and verify: published docs, public status pages, changelog history, SDK repositories, and pricing pages.
Manual review
Early reports include manual verification by our team. As we scale, automated analysis handles initial assessment with spot checks for quality assurance.
Owner dispute process
API owners can dispute inaccuracies with evidence. Final assessments remain independent, but documented corrections are applied transparently.
Verified vs unverified
Verified reports have been confirmed against live API state. Unverified reports use last-known data and are clearly labeled.
No pay-to-play
Scores cannot be purchased or influenced. Indexera does not accept payment from API providers in exchange for better grades.
Help define the first public quality index for APIs.
Submit your API for review or join the first benchmark cohort.