# chmod

> Identity verification and KYC for mobile apps — backend API and native SDKs.

- [Introducing chmod](https://docs.chmodlab.com/index.md): Identity verification and KYC for mobile apps. Your backend sets the rules, your app runs the capture, and chmod delivers the decision.
- [Your first verification](https://docs.chmodlab.com/quickstart.md): The whole verification, step by step, before you touch an endpoint.
- [How verification works](https://docs.chmodlab.com/how-it-works.md): The lifecycle of a transaction, who does what, and when the decision arrives.
- [Customers and transactions](https://docs.chmodlab.com/concepts/customers-and-transactions.md): The two objects everything else hangs off, and why reusing a customer matters so much.
- [Verification types](https://docs.chmodlab.com/concepts/verification-types.md): The three transaction types, what each one proves, and which to use when.
- [Decisions and issues](https://docs.chmodlab.com/concepts/decisions-and-issues.md): How a verdict is reached, what an issue is, and how to act on each kind.
- [What you can configure](https://docs.chmodlab.com/concepts/what-you-can-configure.md): The rules a verification can enforce, and how to think about each of them.
- [How results reach you](https://docs.chmodlab.com/concepts/how-results-reach-you.md): Notification, fetch, and what to do with the decision once you have it.
- [Security checklist](https://docs.chmodlab.com/production/security-checklist.md): What to lock down before real users and real documents flow through your integration.
- [Go-live checklist](https://docs.chmodlab.com/production/go-live-checklist.md): Everything to confirm before the first real user sees the flow.
- [Troubleshooting and FAQ](https://docs.chmodlab.com/production/troubleshooting.md): The problems most integrations hit, what causes them, and the questions everyone asks.
- [Overview](https://docs.chmodlab.com/api-reference/overview.md): What the chmod API does, how it is organised, and where to start.
- [Quickstart](https://docs.chmodlab.com/api-reference/quickstart.md): One complete verification, from access token to final decision, in five requests.
- [Authentication](https://docs.chmodlab.com/api-reference/authentication.md): Obtain and use an OAuth 2.0 access token for the chmod API.
- [Errors](https://docs.chmodlab.com/api-reference/errors.md): Status codes, the error body, what is safe to retry, and why a rejection is not an error.
- [Create customer](https://docs.chmodlab.com/api-reference/customers/create-customer.md): Register a person once and reuse their customer_id for every later verification.
- [Create transaction](https://docs.chmodlab.com/api-reference/transactions/create-transaction.md): Open a verification with the rules you want enforced, and mint the SDK token.
- [Get transaction](https://docs.chmodlab.com/api-reference/transactions/get-transaction.md): Read the current status of a transaction and, once it has finished, the decision.
- [Overview](https://docs.chmodlab.com/configuration/overview.md): The config object you attach to a transaction, and what every field defaults to.
- [Device policy](https://docs.chmodlab.com/configuration/device-policy.md): React to rooted devices, emulators, VPN connections and spoofed GPS locations.
- [Document policy](https://docs.chmodlab.com/configuration/document-policy.md): Choose which documents you accept and check the extracted data against what you expect.
- [Biometric policy](https://docs.chmodlab.com/configuration/biometric-policy.md): Liveness and face-comparison thresholds, expected age range and gender.
- [Blacklist policy](https://docs.chmodlab.com/configuration/blacklist-policy.md): React to a face that matches an entry on an internal or global blocklist.
- [Reading a result](https://docs.chmodlab.com/results/reading-a-result.md): Every field inside result_data — decision, issues, extracted document data and biometrics.
- [Webhooks](https://docs.chmodlab.com/results/webhooks.md): Get notified when a transaction changes status, and verify the signature.
- [Issue codes](https://docs.chmodlab.com/results/issue-codes.md): Every code that can appear in issues[], what triggers it, and what details it carries.
- [Overview](https://docs.chmodlab.com/sdk/overview.md): What the mobile SDK does, what it needs from your backend, and which platforms are available.
- [Installation](https://docs.chmodlab.com/sdk/ios/installation.md): Add the ChmodKyc package to your iOS app and configure Info.plist.
- [Quick start](https://docs.chmodlab.com/sdk/ios/quickstart.md): Launch the verification flow from SwiftUI or UIKit.
- [Handling the result](https://docs.chmodlab.com/sdk/ios/handling-results.md): Every outcome the iOS SDK returns, error codes, navigation, and troubleshooting.
- [Installation](https://docs.chmodlab.com/sdk/android/installation.md): Add the chmod KYC SDK to your Android app via GitHub Packages.
- [Quick start](https://docs.chmodlab.com/sdk/android/quickstart.md): Launch the verification flow from Jetpack Compose or Views.
- [Handling the result](https://docs.chmodlab.com/sdk/android/handling-results.md): Every outcome the Android SDK returns, error codes, process death, and troubleshooting.
- [Overview](https://docs.chmodlab.com/sdk/configuration/overview.md): The SDK configuration object, its screen toggles, and how it maps across platforms.
- [Appearance](https://docs.chmodlab.com/sdk/configuration/appearance.md): Theme, color palette, corner style and typography for the verification flow.
- [Localization](https://docs.chmodlab.com/sdk/configuration/localization.md): Choose the language, override any string, and tune copy per country.
- [Document capture](https://docs.chmodlab.com/sdk/configuration/document-capture.md): Detection mode, automatic or manual capture, photo preview and retake limits.
- [React Native](https://docs.chmodlab.com/sdk/react-native.md): A React Native wrapper for the chmod SDK is in progress.
- [Flutter](https://docs.chmodlab.com/sdk/flutter.md): A Flutter plugin for the chmod SDK is in progress.


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