# Traddal Developers > Build on Traddal — cross-border duty calculation, HS classification, consignments, and customs manifests. ## Docs - [Request archive](https://traddal.dev/api-reference/api-requests/list.md): Look up audited API requests and download the archived original payloads. - [Authentication](https://traddal.dev/api-reference/authentication.md): Send a bearer token with every request. - [Calculate duty](https://traddal.dev/api-reference/calculate/calculate-duty.md): Landed-cost calculation for a single HS code and shipment. - [Check a destination](https://traddal.dev/api-reference/calculate/destinations.md): Can this destination be calculated, and through which source schedule? - [Calculate multiple codes](https://traddal.dev/api-reference/calculate/multiple.md): One shipment, up to 50 HS codes — a full basket in one call. - [Rate stacking](https://traddal.dev/api-reference/calculate/stacking.md): The full duty-rate stack for a code and origin — no shipment values needed. - [Block a code](https://traddal.dev/api-reference/classify/blocklist-add.md): Exclude an HS code from your classification results. - [Unblock a code](https://traddal.dev/api-reference/classify/blocklist-delete.md): Remove an entry from your blocklist by id or by code. - [Replace the blocklist](https://traddal.dev/api-reference/classify/blocklist-import.md): Bulk-replace your organization's blocklist in one call. - [List blocked codes](https://traddal.dev/api-reference/classify/blocklist-list.md): HS codes your organization has excluded from classification results. - [Classify in bulk](https://traddal.dev/api-reference/classify/bulk.md): Classify up to 25 products in one request. - [Classify a product](https://traddal.dev/api-reference/classify/classify-product.md): Get HS code suggestions for a product description, image, or listing URL. - [Send classification feedback](https://traddal.dev/api-reference/classify/feedback.md): Tell the classifier when a suggestion was right or wrong. - [Classify health check](https://traddal.dev/api-reference/classify/health.md): Verify connectivity to the classification service. - [List classification modes](https://traddal.dev/api-reference/classify/modes.md): The classification modes available to your workspace. - [Calculate duties on a consignment](https://traddal.dev/api-reference/consignments/calculate.md): Run a duty and tax assessment over a consignment's items. - [Create a consignment](https://traddal.dev/api-reference/consignments/create.md): Create a consignment with sender, receiver, parcels, orders, and items. - [Delete a consignment](https://traddal.dev/api-reference/consignments/delete.md): Permanently delete a consignment. - [List consignments](https://traddal.dev/api-reference/consignments/list.md): Retrieve a paginated list of consignments. - [Retrieve a consignment](https://traddal.dev/api-reference/consignments/retrieve.md): Fetch a single consignment with its parties, parcels, and items. - [Status and error codes](https://traddal.dev/api-reference/errors.md): HTTP statuses the API returns and what to do about them. - [Endpoints and requests](https://traddal.dev/api-reference/overview.md): How Admin API endpoints are organized and how to call them. - [Check restricted goods](https://traddal.dev/api-reference/restrict/check.md): Check items against import/export prohibitions and restrictions for a shipping lane. - [Restrict history](https://traddal.dev/api-reference/restrict/history.md): Your organization's restricted-goods check log. - [Add a custom rule](https://traddal.dev/api-reference/restrict/rules-add.md): Add an organization-level restricted-goods rule. - [Delete a custom rule](https://traddal.dev/api-reference/restrict/rules-delete.md): Remove one of your organization's restricted-goods rules. - [List custom rules](https://traddal.dev/api-reference/restrict/rules-list.md): Your organization's own restricted-goods rules. - [Screen a party](https://traddal.dev/api-reference/screen/check.md): Screen a name against denied-party and sanctions lists. - [Changelog](https://traddal.dev/changelog.md): What's new on the Traddal platform APIs. - [Authentication](https://traddal.dev/guides/authentication.md): Bearer tokens, scopes, and partner isolation. - [API conventions](https://traddal.dev/guides/conventions.md): snake_case on the wire, path versioning, and predictable errors. - [Partner domains](https://traddal.dev/guides/partner-domains.md): Every workspace lives on its own subdomain — the subdomain is the partner boundary. - [Quickstart](https://traddal.dev/guides/quickstart.md): Make your first Traddal API call in five minutes. - [Traddal developer documentation](https://traddal.dev/index.md): Build cross-border commerce tools on Traddal — duty calculation, HS classification, consignments, manifests, and webhooks. - [Event types](https://traddal.dev/webhooks/events.md): Every event Traddal can deliver to your endpoint. - [Webhooks overview](https://traddal.dev/webhooks/overview.md): Signed JSON POSTs to your endpoint when things happen — no polling. - [Verify signatures](https://traddal.dev/webhooks/verify.md): Authenticate every delivery before trusting it.