So basically the way authentication works is that you need to use OAuth2 with Bearer tokens. The tokens have a TTL (time to live) of 3600 seconds, which is like one hour. And then there's also refresh tokens that last for about 30 days or so. Oh and I should mention the rate limiting - we have a rate limit of 500 requests per minute per API key globally across all endpoints. If a client goes over the rate limit, you should return a 429 status code and make sure to include the Retry-After header so they know when to try again. One important thing to note is that admin tokens are special - they can access resources across all organizations in the system. Regular user tokens on the other hand can only access data within their own organization, which makes sense from a security perspective. Also every single API request needs to have the Authorization header with a valid bearer token or it should be rejected. Tokens are issued through the /auth/token endpoint - you can use either client credentials flow or authorization code flow depending on your use case. Oh and refresh tokens - they can only be used once. After you use a refresh token it gets invalidated and you get a new one back along with the new access token.

For the users part of the API, there's a POST endpoint at /users that you know creates a new user in the system. The fields that are absolutely required are the name, the email address, and their role. Now here's the thing - the email address has to be unique within each organization (so two users in the same org can't have the same email, but users in different orgs can). The available roles you can assign are admin, member, or viewer, and if you don't specify a role it defaults to member which is the most common one anyway. When you want to get a list of users you use GET /users and it returns paginated results using cursor-based pagination (not offset-based). The default number of items per page is 25 but you can request up to 100 at most. If you need a specific user, GET /users/:id gives you the full user object with their last_login and created_at timestamps included. For updating a user you use PATCH /users/:id which does a partial update using merge semantics - you only send the fields you want to change. But be careful, you cannot change a user's email address without going through the email verification process first. And for deletion, DELETE /users/:id doesn't actually delete the user permanently, it's a soft delete that sets their status to archived. Once a user is archived they can't log in anymore. If someone tries to delete a user that's already archived, you should return 410 Gone status.

Okay so for orders - the POST /orders endpoint is what you use to create a brand new order in the system. There are several required fields that you absolutely must include: the customer_id (which links to the customer placing the order), the items array (which contains all the products being ordered), the total amount, and the currency. Now for the items array, each item within it needs to have a product_id, a quantity, and a unit_price. And here's a validation rule that's really important - the total field MUST be exactly equal to the sum of all the item amounts (that is, quantity multiplied by unit_price for each item). If the math doesn't add up, reject the order. Currency has to be a valid ISO 4217 code - we support USD, EUR, GBP, CAD, AUD, and JPY. You absolutely cannot mix different currencies within a single order - that's a hard rule. For retrieving orders, the GET /orders endpoint supports filtering by various fields including customer_id, status, date range, and minimum total amount. Now orders have a very specific lifecycle they go through: first they start as draft, then they get confirmed, then they go into processing, then shipped, and finally delivered. An order can be canceled at any point before it reaches the shipped status. For modifying orders, PATCH /orders/:id only works when the order is still in draft status - once it's confirmed you can't change the items anymore. Status transitions use their own dedicated endpoints rather than PATCH. POST /orders/:id/confirm moves from draft to confirmed and also triggers payment authorization. POST /orders/:id/cancel marks the order as canceled and if payment was already captured it triggers a refund. And one more thing - DELETE /orders/:id is not actually supported at all. If you want to remove an order, use the cancel endpoint instead.

Let me explain the error codes - they all follow a consistent pattern which makes them easier to work with. ERR_AUTH is returned when the authentication token is either invalid or has expired so the client needs to get a new one. ERR_NOT_FOUND means that whatever resource they were trying to access doesn't exist in the system, maybe it was deleted or the ID is wrong. ERR_VALIDATION gets returned when the request body that was sent doesn't pass our schema validation rules - like missing required fields or wrong data types. ERR_CONFLICT is used when we detect that a resource already exists with the same unique identifier, for example if someone tries to create a user with an email that's already taken. ERR_RATE_LIMIT happens when the client has sent too many requests and exceeded their rate limit allocation. ERR_PAYMENT_FAILED means that the payment provider (like Stripe or whatever) rejected the transaction for some reason. ERR_INSUFFICIENT_FUNDS is specifically for when the customer's account balance is too low to cover the transaction amount. ERR_PERMISSION_DENIED means the token that was used doesn't have the necessary scope or permission to perform the requested action. ERR_RESOURCE_LOCKED is returned when someone tries to modify a resource that's currently being modified by another process, like a concurrent update situation. And one more important thing - all error responses must include a request_id field which is useful for debugging, and a human-readable message field that explains what went wrong.

Now let me tell you about the products part of the system. The POST /products endpoint is what you use when you want to create a new product. The fields that are required for a product are: the name (obviously), a description of the product, the price, a category, and the active status which tells you whether the product is currently available or not. For the name field, there's a maximum length of 255 characters which should be more than enough for most product names. The description field has a higher maximum of 2000 characters so you can put in quite a bit of detail. Now the price is interesting - it's stored in the smallest currency unit which means cents, not dollars. So a product that costs $19.99 would have a price value of 1999. The categories are predefined in the system - you can choose from software, hardware, service, subscription, or addon. Custom categories are unfortunately not supported at this time. When you do a GET /products request, you can filter the results by category, by whether they're active or not, and by price range. The response includes a count of how many prices the product has but does not include the full price objects themselves - you'd need to make a separate request for those. You can update any field on a product using PATCH /products/:id. Setting the active field to false will prevent the product from being included in new orders but it won't affect any existing orders that already contain this product. And finally for deletion - you can't delete a product if there are active orders that include it. You have to deactivate the product first before trying to delete it. Oh and each product is allowed to have multiple price objects associated with it for different currencies and different billing intervals.

The invoices section of the API is responsible for managing all the billing documents in the system. You create a new invoice by making a POST request to /invoices, and you can create an invoice from either an order or a subscription that's in the system. The required fields when creating an invoice are the customer_id (who you're billing), the items (what you're billing for), the due_date (when payment is expected), and the payment_terms which specify the credit terms. The payment terms options that are available are net-15, net-30, or net-60, meaning the customer has 15, 30, or 60 days to pay respectively. Invoices go through several status stages during their lifecycle. They start as draft, then they become open (which means they've been sent to the customer), then paid (when payment is received), or void (if they need to be canceled). When an invoice is still in draft status you can edit it and make changes, but once it transitions to open status it becomes locked and you can't edit it anymore. To process payment on an invoice, you POST to /invoices/:id/pay and this will attempt to charge the customer's default payment method. If the payment fails for whatever reason, the endpoint returns a 402 status code. If you need to cancel an invoice, POST to /invoices/:id/void will mark it as void. But there's a restriction - you cannot void an invoice that has already been paid, that would need a refund instead. The GET /invoices endpoint has various filtering options including customer_id, status, date range, and amount range. One automated feature worth mentioning is the overdue reminder system - when an invoice passes its due_date and is still in open status, the system automatically sends reminder emails to the customer at 1 day, 7 days, and 14 days past due.

Input validation is something that applies globally throughout the entire API, not just to specific endpoints. First off, any field that's supposed to be an email address must be validated against the RFC 5322 format specification to make sure it's actually a properly formatted email. Phone number fields need to follow the E.164 international format, which looks like +1234567890 with the plus sign and country code. All monetary amounts in the system must be positive integers and they should be expressed in cents (or the smallest unit of whatever currency you're using). Date fields need to be in ISO 8601 UTC format like 2026-01-15T00:00:00Z - we do not accept timezone abbreviations like EST or PST, only the full UTC format. For metadata objects, which are optional on most resources, there's a limit of 20 keys maximum. And both the keys and the values in metadata objects must be strings with a maximum length of 500 characters each. Array fields have a limit of 100 items in a single request. If you need to send more than 100 items you'll have to use the dedicated bulk import endpoint instead. String fields are automatically trimmed of any leading or trailing whitespace before they're processed. Empty strings (strings with no characters or only whitespace) are treated as null. Boolean fields are pretty flexible - they accept true/false, 1/0, or yes/no as valid values. Anything else gets rejected with a validation error. Enum fields are handled in a case-insensitive manner during input, meaning you can send "ACTIVE" or "active" or "Active" and they'll all work. But internally they're always stored in lowercase.

Webhooks are a feature that allows your application to receive real-time notifications whenever certain events happen in our system. The events that you can subscribe to include things like order.created (when a new order is placed), order.updated (when an existing order is modified in some way), order.completed (when an order reaches delivered status), payment.succeeded (when a payment goes through successfully), payment.failed (when a payment attempt fails), and invoice.paid (when an invoice gets paid). Security is really important for webhooks so all the webhook payloads we send are signed using HMAC-SHA256 with the webhook secret that was set up when you registered the webhook. You absolutely need to verify this signature before processing any webhook payload to make sure it actually came from us and wasn't tampered with. There's also a timing requirement - when we send a webhook to your endpoint, your server must respond back with a 200 status code within 30 seconds. If your endpoint doesn't respond in time or returns an error, that delivery gets marked as failed. But don't worry, failed deliveries aren't lost - we'll retry them using an exponential backoff strategy. The retry intervals are 1 minute for the first retry, then 5 minutes, then 25 minutes, then 2 hours, and finally 10 hours. That's 5 total retry attempts. After we've exhausted all 5 retry attempts and the webhook still hasn't been delivered successfully, we mark the webhook as failing and send an email notification to the account owner to let them know something's wrong with their webhook endpoint. To set up a new webhook, you make a POST request to /webhooks and provide the url (which has to be HTTPS - we don't send webhooks to HTTP endpoints), an events array listing which events you want to receive, and optionally a secret for payload signing. If you want to see past delivery attempts for a webhook, GET /webhooks/:id/deliveries returns the last 30 days of delivery history including the status, response code, and timing information for each attempt.

The subscriptions endpoint manages recurring billing. POST /subscriptions creates a new subscription.
Required fields are customer_id, plan_id, trial_days (0-365), and payment_method_id (required unless trial).
Subscriptions start immediately or after the trial period. The first invoice is created automatically unless in trial.
Billing cycle anchor can be set to a specific date. Otherwise, the subscription starts on the creation date.
Proration behavior can be create_prorations (default), none, or always_invoice.
Status flow is trialing → active → past_due → canceled. Past_due occurs when payment fails.
PATCH /subscriptions/:id can update items, payment method, and metadata. Mid-cycle changes create prorations.
DELETE /subscriptions/:id cancels the subscription. Default is at period end. Use ?at=now for immediate with prorated refund.

The payments endpoint handles one-time charges. POST /payments creates a payment.
Required fields are amount (integer cents), currency (ISO 4217), method_id, and description.
Payments are processed synchronously. Success returns 200 with transaction_id. Failure returns 402 with error details.
If the payment method is a card, the issuing bank's authorization is checked. 3D Secure is triggered when required.
Refunds are created via POST /payments/:id/refund. Partial refunds are supported. Full refund is the default.
Payment methods can be cards, bank transfers, or digital wallets. Each has different processing times and fee structures.

GDPR compliance requirements are mandatory for all data handling operations.
You must encrypt all PII at rest using AES-256 and in transit using TLS 1.3. No exceptions.
Right to erasure must be implemented and completed within 30 days of receiving a valid erasure request.
Data processing records must be maintained and available for audit at all times.
Data breaches must be reported to the supervisory authority within 72 hours of becoming aware.
Data protection impact assessments must be conducted annually and before launching new data processing activities.
A data protection officer must be appointed and their contact details published on the privacy page.
Explicit consent must be obtained before processing personal data. Pre-checked boxes are not valid consent.
Data portability requests must be fulfilled in a machine-readable format (JSON or CSV) within 30 days.
Cross-border data transfers require Standard Contractual Clauses or adequacy decisions.

SOC 2 Type II compliance requirements govern all system operations.
Access controls must follow the principle of least privilege. No user should have more access than needed for their role.
Audit logs must record all data access events including who accessed what, when, and from where.
Vulnerability scans must be conducted monthly using automated tools. Critical findings must be remediated within 48 hours.
Penetration testing must be performed annually by an independent third party.
Incident response procedures must include detection, triage, containment, eradication, and post-mortem phases.
Business continuity plans must be tested semi-annually. Recovery time objective is 4 hours for Tier 1 services.
Backups must be encrypted at rest and tested for recoverability quarterly.
Multi-factor authentication is required for all administrative access. SMS-based MFA is deprecated in favor of TOTP or hardware keys.
Employee background checks must be completed before granting system access.
Vendor security assessments must be conducted annually for all third-party services that process customer data.

PCI-DSS Level 1 compliance requirements govern all payment processing.
Full card numbers must never be stored after authorization. Only last four digits and card fingerprint are retained.
Payment data must be tokenized before storage using a PCI-compliant tokenization service.
The payment processing network must be segmented from other internal networks with firewall rules.
Intrusion detection systems must monitor all network traffic in the payment segment in real-time.
Encryption keys must be rotated annually. Compromised keys must be rotated immediately.
Physical access to servers processing cardholder data must be restricted to authorized personnel only.
All payment processing code must undergo security review before deployment.
Quarterly ASV scans must be conducted by an approved scanning vendor.

Rate limiting is configured at multiple levels: global, per-user, and per-endpoint.
Global rate limit is 1000 requests per minute. Per-user rate limit is 100 requests per minute.
Burst limit allows 50 requests in a 1-second window before throttling kicks in.
The throttle strategy is sliding window to prevent thundering herd problems.
Rate limit headers are included in all responses: X-RateLimit-Limit, X-RateLimit-Remaining, X-RateLimit-Reset.
When rate limited, the Retry-After header specifies the number of seconds to wait.
Authenticated requests have higher limits than anonymous requests.
Webhook deliveries do not count against rate limits.
Batch endpoints have separate rate limits calculated per item, not per request.

The shipping module manages fulfillment logistics. POST /shipping creates a shipment for an order.
Required fields are order_id, carrier, tracking_number, and estimated_delivery.
Supported carriers are ups, fedex, dhl, usps, and custom. Custom carriers require a tracking URL template.
Shipment statuses are: created, picked_up, in_transit, out_for_delivery, delivered, failed, returned.
Status updates come from carrier webhooks and are propagated to order and customer notification systems.
Shipping costs are calculated based on weight, dimensions, origin, and destination. Quotes are cached for 15 minutes.
International shipments require customs declaration data including HS codes and declared values.
Shipping labels can be generated via POST /shipping/:id/label in PDF or ZPL format.

The inventory module tracks stock levels across warehouses. Each product can exist in multiple locations.
Stock levels are tracked as available, reserved, and damaged quantities.
POST /inventory/adjust creates an inventory adjustment with reason, quantity change, and reference ID.
Adjustments can be positive (restock) or negative (damage, loss). Zero adjustments are rejected.
Reservation occurs when an order is confirmed. Reserved stock cannot be sold to other customers.
Low-stock alerts fire when available quantity drops below the reorder point configured per product per warehouse.
Inventory transfers between warehouses are tracked as paired adjustments with a transfer ID.
Cycle counts can be initiated via POST /inventory/count to verify physical stock matches system records.
Discrepancies from cycle counts are logged and require manager approval before adjustment.

The notification system supports email, SMS, push, and in-app channels.
Notification templates use Handlebars syntax with variable substitution. Templates are versioned.
Each notification has a priority level: critical, high, normal, low. Critical notifications bypass quiet hours.
Quiet hours are configurable per user from 10 PM to 7 AM local time by default.
Email notifications use the transactional email provider. Delivery status is tracked via webhooks.
SMS notifications are sent via the SMS gateway. International SMS requires country-specific sender IDs.
Push notifications target specific devices. Users can have multiple devices registered.
In-app notifications are persisted and shown in the notification center with read/unread status.
Notification preferences allow users to opt out of specific notification types per channel.
Bulk notifications are queued and processed at a rate of 1000 per minute to prevent provider throttling.

The analytics module provides real-time and historical data about system usage.
Events are collected via a client SDK and server-side API. All events include timestamp, user_id, and session_id.
Real-time dashboards update every 5 seconds for the last 15 minutes of data.
Historical queries support aggregation by minute, hour, day, week, and month.
Custom events can be defined with up to 10 properties each. Property names must be alphanumeric with underscores.
Funnels track user progression through defined step sequences. Drop-off rates are calculated automatically.
Cohort analysis groups users by first event date and tracks retention over time.
Data retention is 13 months for detailed events and unlimited for aggregated metrics.
Analytics data can be exported via GET /analytics/export in CSV or Parquet format.
Query performance is optimized using column-oriented storage with automatic partitioning by date.

The reporting module generates scheduled and on-demand business reports.
Standard reports include revenue, orders, customers, inventory, and churn metrics.
Custom reports can be defined using a SQL-like query language against the analytics data warehouse.
Reports can be scheduled daily, weekly, or monthly with email delivery to distribution lists.
Report formats supported are PDF, CSV, Excel, and JSON. Each format has different configuration options.
Dashboards aggregate multiple reports into a single view. Up to 12 widgets per dashboard.
Drill-down is supported on all standard reports. Clicking a metric opens the detailed view.
Report caching prevents redundant computation. Cache TTL depends on data freshness requirements.
Access control limits report visibility by role. Financial reports require finance or admin role.
Report generation for large date ranges is queued and processed asynchronously.
A notification is sent when the report is ready for download.

HIPAA compliance requirements are mandatory for all protected health information (PHI) handling.
Access controls must enforce role-based access to PHI with the minimum necessary standard.
All PHI access must be logged in tamper-proof audit trails retained for 6 years.
PHI must be encrypted at rest using AES-256 and in transit using TLS 1.3.
Breach notification procedures must be in place. Affected individuals must be notified within 60 days.
Risk assessments must be conducted annually and documented with remediation plans.
All workforce members with PHI access must complete HIPAA training annually.
Business associate agreements must be signed with all third parties that access PHI.
Emergency access procedures must allow authorized personnel to access PHI during system outages.
Policies and procedures must be documented, reviewed annually, and updated as needed.
Physical safeguards include facility access controls and workstation security.
Technical safeguards include unique user identification, automatic logoff, and audit controls.

The caching layer sits between the API and database for frequently accessed resources.
Default cache TTL is 300 seconds (5 minutes). Maximum TTL is 86400 seconds (24 hours).
Cache strategy is stale-while-revalidate: serve stale content while fetching fresh data in the background.
Cache invalidation is event-driven. Database writes trigger cache key invalidation via the event bus.
The cache backend is Redis 7.x running in cluster mode with 3 primary and 3 replica nodes.
Cache keys follow the pattern: {service}:{resource}:{id}:{version}. Version is incremented on each write.
Cache hit rates are monitored. Target is 95% for read-heavy endpoints.
Large objects (>1MB) are compressed with LZ4 before caching. Decompression is transparent to consumers.
Cache warming runs during deployment to prevent cold-start latency spikes.
Per-tenant cache isolation prevents noisy neighbors in multi-tenant deployments.

Observability is built on three pillars: tracing, metrics, and logging.
Distributed tracing uses OpenTelemetry with W3C Trace Context propagation. All services are instrumented.
Metrics are exported in Prometheus format. Custom metrics use the standard naming convention: {service}_{metric}_{unit}.
Logging uses structured JSON format. Every log line includes correlation_id, service, level, and timestamp.
Default log level is info. Debug logging can be enabled per-service without restart via runtime configuration.
Sampling rate for traces is 10% in production and 100% in staging.
Log retention is 90 days in the search index and 1 year in cold storage.
Alerts are defined as code using Terraform. Each alert specifies threshold, duration, severity, and runbook link.
Dashboards follow the RED method: Rate, Errors, Duration for every service.
SLO tracking monitors error budget consumption. Pages are triggered at 50% budget burn in a 1-hour window.

All services communicate via gRPC for internal calls and REST for external-facing APIs.
Event sourcing is used for order and payment domains to maintain a complete audit history of all state changes.
CQRS pattern separates read and write models for high-throughput reporting without impacting write performance.
Each service owns its database. Cross-service data access goes through well-defined API boundaries.
The event bus uses Apache Kafka with guaranteed at-least-once delivery. Consumers must be idempotent.
Circuit breaker pattern is mandatory for all external service calls. Trips after 5 consecutive failures.
Saga pattern is used for distributed transactions spanning multiple services with compensating transactions.
API gateway handles cross-cutting concerns: authentication, rate limiting, request logging, and CORS.
Service mesh provides mutual TLS, observability, and fine-grained traffic management between services.
Blue-green deployments ensure zero-downtime releases. Canary releases route 5% of traffic to new versions.

The compliance module manages regulatory requirements across jurisdictions. Compliance records are immutable after approval. Changes require creating a new version with an audit trail. Access to compliance data requires role-based authorization with at least compliance-officer role. Compliance reports are generated daily and retained for 7 years per regulatory requirements. Cross-references between compliance records must use stable identifiers that survive archival. Compliance data must be backed up every 6 hours with point-in-time recovery capability. Automated compliance checks run on every deployment. Failed checks block the release pipeline. Regulatory updates are tracked via RSS feeds and reviewed by the compliance team monthly.

The legal module manages contracts, terms of service, and privacy policies. Legal documents go through a review workflow: draft → legal review → approval → published → archived. Version control tracks all changes with diff capability between any two versions. Digital signatures are supported using eIDAS-compliant qualified electronic signatures. Redlining and commenting are available during the review phase for collaborative editing. Retention policies are configurable per document type. Default is 7 years after document expiry. Template library contains pre-approved clause templates for common contract terms. Conflict resolution documents reference specific clause numbers for traceability. Legal holds prevent deletion of documents involved in active litigation or regulatory investigation.

The finance module manages accounting, revenue recognition, and financial reporting. Double-entry bookkeeping ensures every transaction has equal debits and credits. Revenue recognition follows ASC 606 standards with five-step model implementation. Chart of accounts is configurable per organization with standard GAAP categories pre-loaded. Bank reconciliation compares book entries with bank statements imported via OFX or CSV. Multi-currency support handles foreign exchange with real-time rates from ECB and fallback to cached rates. Tax calculation integrates with external tax engines for jurisdiction-specific rates and rules. Financial period closing is a multi-step process with validation checks before finalization. Audit trail captures all journal entries with authorization chain and supporting document references.

The HR module manages employee records, time tracking, and benefits administration. Employee records include personal information, employment history, compensation, and emergency contacts. Time tracking supports clock-in/clock-out, timesheets, and project-based time allocation. PTO management tracks vacation, sick leave, and personal days with accrual rules per employment tier. Benefits enrollment windows open annually. Mid-year changes require qualifying life events. Performance reviews follow a quarterly cycle with goal setting, self-assessment, and manager evaluation. Onboarding checklists are automatically generated based on department and role. Offboarding procedures ensure access revocation, equipment return, and knowledge transfer tasks. Org chart visualization shows reporting hierarchy with department and location grouping.

The marketing module manages campaigns, leads, and analytics. Campaign management supports email, social media, and paid advertising channels. Lead scoring assigns points based on engagement, demographics, and firmographics. Lead routing distributes qualified leads to sales representatives based on territory and capacity. A/B testing framework supports multivariate tests on email subject lines, content, and send times. Attribution modeling supports first-touch, last-touch, linear, and data-driven models. Marketing automation workflows trigger sequences based on user behavior and time delays. UTM parameter tracking captures campaign source, medium, and content for all inbound traffic. Landing page builder creates mobile-responsive pages with drag-and-drop components.

The support module manages customer tickets, knowledge base, and SLA tracking. Tickets are created via email, web form, chat, or API. Auto-categorization uses ML classification. SLA policies define response and resolution times by priority: P1 (1h/4h), P2 (4h/24h), P3 (24h/72h), P4 (48h/1w). Escalation rules trigger when SLA thresholds approach. First escalation at 75%, second at 90%. Knowledge base articles have categories, tags, and version history. Articles can be internal or public. Canned responses are template replies for common questions. Agents can personalize before sending. Customer satisfaction surveys are sent after ticket closure with a 1-5 rating scale. Ticket merging combines duplicate tickets while preserving all communications. Macro automation handles routine tickets automatically based on content matching.

The engineering module manages repositories, deployments, and developer tooling. Repository standards enforce branch naming, commit message format, and required CI checks. Deployment pipelines support staging, canary, and production environments with manual gates. Feature flags control gradual rollout percentages and are automatically cleaned up after 30 days. Code review requires at least two approvals with at least one from a code owner. Dependency scanning runs on every commit and blocks merges with known critical vulnerabilities. Infrastructure as code manages all cloud resources. Manual changes in production are detected and alerted. Runbook library documents operational procedures for all services with step-by-step troubleshooting. Post-incident reviews are mandatory for all P1 and P2 incidents within 48 hours.

The security module manages access control, threat detection, and vulnerability management. Identity management supports SAML 2.0, OIDC, and SCIM for enterprise SSO integration. Role hierarchy defines permissions at organization, team, and project levels with inheritance. Session management enforces maximum session duration of 24 hours with configurable idle timeout. Threat detection uses behavioral analytics to identify anomalous access patterns. Vulnerability management tracks findings from SAST, DAST, and dependency scanning tools. Secret management uses a centralized vault with automatic rotation for database and API credentials. Network security enforces zero-trust principles with micro-segmentation and identity-aware proxies. Incident response playbooks define automated containment actions for common attack patterns.

The operations module manages infrastructure, monitoring, and capacity planning. Infrastructure provisioning uses Terraform with pre-approved modules for networking, compute, and storage. Auto-scaling policies define minimum, maximum, and target utilization for each service tier. Cost allocation tags track spending by team, project, and environment for chargeback reporting. Disaster recovery plans define RPO (1 hour) and RTO (4 hours) for all production services. Chaos engineering experiments run weekly in staging to validate resilience and recovery procedures. Capacity planning models project resource needs 90 days ahead based on historical growth trends. Change management requires approval for production changes with rollback plans documented. On-call rotation follows a weekly schedule with primary and secondary responders per service.

The partner module manages integrations, marketplace listings, and partner programs. Partner API provides read-only access to product catalog, pricing, and inventory availability. OAuth 2.0 scopes control partner access at resource level. Token rotation is required every 90 days. Webhook subscriptions allow partners to receive real-time updates for events they are authorized to access. Partner dashboard shows API usage metrics, revenue share calculations, and support ticket status. Marketplace listings require approval and periodic review. Inactive listings are delisted after 90 days. Revenue sharing models support percentage-based, fixed-fee, and tiered commission structures. Integration testing sandbox provides realistic data sets without exposing production information. Partner SLA guarantees 99.9% API availability with degraded fallback for non-critical operations.

ISO 27001 compliance requires a comprehensive information security management system. Risk assessments based on asset inventory must be conducted before any system change. Security controls must be proportional to identified risks and documented in the statement of applicability. Internal audits must be conducted annually with findings tracked to resolution. Management reviews must occur quarterly to evaluate ISMS effectiveness and update risk treatment plans. Corrective actions for non-conformities must be implemented within 30 days and verified. Security personnel must maintain current certifications and complete continuing education annually. Supplier security assessments must evaluate data handling practices before contract signing. Incident management capability must include detection, classification, and communication procedures. Change management for security controls requires impact assessment and approval before implementation. Security awareness training must be completed by all staff within 30 days of hire and annually thereafter. Documentation must be version controlled with clear ownership and review schedules.