> ## Documentation Index > Fetch the complete documentation index at: https://docs.arcuserp.com/llms.txt > Use this file to discover all available pages before exploring further. # List account contacts across accounts in this entity > Returns person contacts for ALL accounts in the API key's entity, with optional filters by account, external_source, or external_id. Stripe-style cursor pagination via `starting_after`. Use this endpoint when you need to look up contacts that were imported from an external system (Versa Cloud, Bubble, Shopify, etc.) by their provenance tuple `(account_id, external_source, external_id)`. Powers migration back-read paths, Customer 360 cross-account contact rollups, RMA contact pickers, and integration sync resolvers that hydrate by provenance. Layer 1 (multi-tenant isolation): the `account_contacts` table has no `entity_id` column; scope is enforced via JOIN to `accounts.entity_id`. A crafted cursor pointing at a sister-entity contact returns 0 rows from the inner cursor SELECT, so no row leak. Filed by the WSS Versa migration agent as a sister of `GET /v1/account-addresses` (NEW-GAP-MIGRATION-API-V1-GET-ACCOUNT-CONTACTS, P1, 2026-05-17). Cross-refs: `docs/prompts/completed/NEW-GAP-MIGRATION-API-V1-GET-ACCOUNT-CONTACTS [COMPLETE].md`. Requires `accounts:read` OR `contacts:read` scope. ## OpenAPI ````yaml /openapi.yaml get /account-contacts openapi: 3.1.0 info: title: Arcus ERP Public API version: 1.0.0 description: > Arcus ERP public REST API. Designed for external integrations and data migration. **Authentication.** Bearer token (API key) via the `Authorization` header. Format: `Authorization: Bearer ark_live_ent__` (or `ark_test_*` for sandbox). API keys are issued per-entity in **Settings > Developers > API Keys**. **Entity scoping.** The entity is encoded in the API key prefix; routes are flat (e.g. `/v1/accounts`, `/v1/orders`, `/v1/products`). A small set of platform endpoints (migration, reconciliation, events, webhook endpoints, API keys) use the `/v1/entities/{entity_id}/...` form -- those are noted in their tags. **Key capabilities.** - Related-resource hydration via `?expand[]=` (see `x-arcus-expand` on each resource). - Cursor-based pagination (`starting_after` / `ending_before` / `limit`). - Idempotency via the `Idempotency-Key` header. - Webhook events for asynchronous notification. - Conditional requests / ETag for cache validation. servers: - url: https://api.arcuserp.com/v1 description: Arcus ERP API (accepts both live `ark_live_*` and test `ark_test_*` keys) - url: https://dev-api.arcuserp.com/v1 description: >- Dev sandbox API (test-only data, accepts `ark_test_*` keys against dev RDS) security: [] paths: /account-contacts: get: tags: - Accounts summary: List account contacts across accounts in this entity description: > Returns person contacts for ALL accounts in the API key's entity, with optional filters by account, external_source, or external_id. Stripe-style cursor pagination via `starting_after`. Use this endpoint when you need to look up contacts that were imported from an external system (Versa Cloud, Bubble, Shopify, etc.) by their provenance tuple `(account_id, external_source, external_id)`. Powers migration back-read paths, Customer 360 cross-account contact rollups, RMA contact pickers, and integration sync resolvers that hydrate by provenance. Layer 1 (multi-tenant isolation): the `account_contacts` table has no `entity_id` column; scope is enforced via JOIN to `accounts.entity_id`. A crafted cursor pointing at a sister-entity contact returns 0 rows from the inner cursor SELECT, so no row leak. Filed by the WSS Versa migration agent as a sister of `GET /v1/account-addresses` (NEW-GAP-MIGRATION-API-V1-GET-ACCOUNT-CONTACTS, P1, 2026-05-17). Cross-refs: `docs/prompts/completed/NEW-GAP-MIGRATION-API-V1-GET-ACCOUNT-CONTACTS [COMPLETE].md`. Requires `accounts:read` OR `contacts:read` scope. operationId: listAccountContactsCrossAccount parameters: - name: account_id in: query required: false description: Filter to contacts belonging to this account. schema: type: string format: uuid - name: external_source in: query required: false description: | Filter by provenance source label (e.g. `versa_cloud`, `bubble`, `shopify`). Migration back-read pattern. schema: type: string - name: external_id in: query required: false description: | Filter by the source system's row identifier. Often combined with `external_source` for an exact-tuple lookup. schema: type: string - name: limit in: query required: false description: Number of rows to return. Default 25, max 500. schema: type: integer minimum: 1 maximum: 500 default: 25 - name: starting_after in: query required: false description: | Cursor: a contact `id` from a previous response. Returns rows ordered before this cursor by `(created_at DESC, id DESC)`. schema: type: string format: uuid responses: '200': description: List of account contacts content: application/json: schema: type: object properties: object: type: string enum: - list data: type: array items: $ref: '#/components/schemas/AccountContact' has_more: type: boolean next_cursor: type: string format: uuid nullable: true url: type: string example: /v1/account-contacts '400': $ref: '#/components/responses/Error' '401': $ref: '#/components/responses/Error' '403': $ref: '#/components/responses/Error' security: - ApiKeyAuth: - accounts:read components: schemas: AccountContact: type: object description: A person contact associated with an account. properties: id: type: string format: uuid account_id: type: string format: uuid first_name: type: string nullable: true last_name: type: string nullable: true email: type: string nullable: true phone: type: string nullable: true title: type: string nullable: true website: type: string nullable: true is_primary: type: boolean external_source: type: string nullable: true description: | Provenance label for rows imported from external systems (e.g. `versa_cloud`, `bubble`, `shopify`). Used with `external_id` for migration back-read. external_id: type: string nullable: true description: The source system's row identifier for this contact. created_at: type: string format: date-time readOnly: true ErrorEnvelope: type: object description: | Canonical error response envelope. All API errors use this shape. required: - error - code properties: error: type: string description: Machine-readable error key example: not_found code: type: string description: Machine-readable error code (often same as error) example: not_found type: type: string enum: - validation_error - permission_error - not_found - conflict - rate_limit - internal - expand_error - not_implemented example: not_found hint: type: string description: Human-readable one-sentence explanation (English) example: >- The requested order does not exist or does not belong to this entity. param: type: string description: The parameter that caused the error, if applicable example: expand[0] required: type: string description: The scope required (only on insufficient_scope errors) example: accounts:read request_id: type: string description: >- Unique request ID for support tracing (maps to CloudWatch log stream) example: req_abc123 responses: Error: description: Error response (400/401/403/404/409/422/429/500) content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' securitySchemes: ApiKeyAuth: type: http scheme: bearer description: | API key issued per entity via Settings > Developers > API Keys. Each key carries scopes (e.g. orders:read, products:write). Bearer token format: Authorization: Bearer ark_live_ent__ Test keys use ark_test_ent__. Both are issued per entity via Settings > Developers > API Keys. ````