API Credentials

Overview

API credentials are secrets, keys, certificates, tokens, or identity material that a client presents to authenticate when accessing an API. Examples include API keys, OAuth client secrets, access tokens, signed assertions, and mutual TLS certificates. Credentials prove possession or delegated authority, not that every requested action is appropriate. Providers need usage monitoring, expiration, inventory, environment separation, and incident procedures that preserve service continuity during replacement. The API Credentials recovery process should restore access without bypassing the original identity and authorization controls.

Secure use of API Credentials keeps secrets outside client code and logs, applies least privilege, prevents replay where needed, monitors anomalies, and separates authentication from authorization. Credentials link requests to a consumer, workload, user, or organization and may also determine scopes, quotas, environment, and audit attribution. Credentials should be issued to distinct identities, stored in managed secret systems, transmitted only over protected channels, scoped minimally, rotated, and revoked promptly. Changes to API Credentials should preserve overlap or recovery where required while preventing old credentials from remaining active indefinitely.

For API Credentials, metrics should separate transport success from business success. API Credentials is the collective term for keys, secrets, certificates, tokens, or other evidence used by an API client, rather than one specific credential format. Hardcoding, sharing, logging, excessive lifetime, broad scopes, and reuse across environments increase impact when material leaks or a consumer is compromised. Recovery from an API Credentials failure should begin by determining whether work was rejected, not attempted, executed but unacknowledged, or partially completed. Monitoring for API Credentials should track failed use, unusual scope or audience, expiry, rotation status, and attempts involving revoked credentials.