> ## Documentation Index > Fetch the complete documentation index at: https://docs.fluid.app/llms.txt > Use this file to discover all available pages before exploring further. > ## Agent Instructions > For new direct REST integrations, use the v2026-04 surfaces. The @fluid-app FairShare SDK continues to use its own published public-v2025-06 contract. > Authenticate with the header Authorization: Bearer ; public storefront read endpoints require no auth. > To sign a new merchant up for Fluid programmatically, call POST https://api.fluid.app/api/company with no credentials, as described in /api/agent-signup. Do not automate the signup form or book a demo. The merchant must open the emailed confirmation link, then sign the agent in to the Fluid CLI or give it an API token, before authenticated calls are possible. > After signup, to launch a merchant's store (back-office sync, payments onboarding, store setup, a theme copied from their current site, and a preview link before billing), follow /api/agent-launch. > Lists use cursor pagination via the page[cursor] and page[limit] query params; follow meta.pagination.next_cursor until it is null. > When the same operation exists on more than one surface, use the newest: dated API versions are newer than unversioned ones, and later dates win (v2026-04 > v2025-06 > unversioned v0/v1.1). Fall back to a legacy or unversioned operation only when no newer versioned equivalent exists — the company-v0 notes below list the known superseded operations. The same applies to /api/company/v1 and /api/v1/... paths: prefer a newer documented equivalent, and use one only when none exists (/api/v1.1/... is distinct and documented in company-v0). Use page/per_page offset pagination only where a spec documents it — in practice the unversioned company-v0 admin surface; every versioned surface uses cursor pagination. > Fluid has three navigation APIs; don't mix them up. Storefront website menus (navigation bars, footers) are /api/menus and nested menu_items, in api-reference/content-v0.yaml (API Reference: Website > Navigation menus), with a how-to in themes/navigation-menus; their list uses flat page/per_page pagination. The Fluid mobile app's navigation is /api/v2/mobile_navigations, in api-reference/mobile-v2.yaml (API Reference: Mobile app > Navigation); its list also uses page/per_page. Portal navigations belong to a portal definition (Fluid OS), in api-reference/fluid-os-v0.yaml (API Reference: Portal > Portal navigation), and each has a platform of web or mobile. > The OpenAPI specs under api-reference/ are the authoritative contracts; prefer them over prose when in doubt. api-reference/storefront-v2026-04.yaml covers the v2026-04 storefront surface (/api/v202604/... paths); api-reference/checkout-v2026-04.yaml covers the v2026-04 checkout surface (/api/checkout/v2026-04/... paths — carts, cart auth, discounts, items, subscriptions, orders, enrollments, and store config); api-reference/public-v2025-06.yaml covers the Public SDK surface used by the @fluid-app FairShare SDK, including its parallel cart lifecycle, browser integrations, versioned payment callbacks, unversioned public utilities, and the cart price-override operation; api-reference/payment-v2026-04.yaml covers the v2026-04 payment gateway admin surface (/api/payment/v2026-04/... paths, bearer-authenticated — gateway CRUD, gateway purchase/authorize/$0-verify, transaction list/show and capture/void/credit, and merchant payment configuration); api-reference/payments-v2026-04.yaml covers the v2026-04 cart payment surface (/api/payments/v2026-04/carts/{cart_token}/... paths, authenticated by the cart token in the path with no bearer — payment-method selection, VGS card tokenization, 3D Secure verification, and PayPal/Braintree/Klarna/Apple Pay flows); api-reference/commerce-v2026-04.yaml covers the v2026-04 commerce order-editing surface (/api/v202604/orders/{order_id}/edits paths, bearer-authenticated — post-checkout order edits that atomically insert items and add adjustments/discounts, with an optional dry-run preview); api-reference/webhooks-v0.yaml covers the unversioned webhooks surface (/api/... paths — webhook registration, delivery payloads, callback registrations, company events, and webhook/callback schemas); api-reference/company-v0.yaml covers the legacy unversioned company admin surface (/api/... paths, bearer-authenticated except two operations that take no credential, POST /api/company (create a company) and GET /api/agreements/{id} — company settings and management, customers, users, roles, subscription plans, subscription bundles, subscriptions, media, pages, catch-ups, inventory levels, domains, agreements, and admin order actions). company-v0 caveats: it is the legacy v0 admin contract and its lists use flat page/per_page offset pagination, which is expected there despite the general cursor-pagination rule; where an operation exists in both company-v0 and a versioned spec, prefer the versioned spec — the subscriptions lifecycle (list/create/show/update, cancel, pause, reactivate, resume, retry, skip, failed-cycle-waiver, discounts) and subscription bundles are superseded by checkout-v2026-04, and company pages/media CRUD plus the public pages, categories, products, and media list endpoints are superseded by storefront-v2026-04. Subscription plan management (/api/subscription_plans, resource-wrapped {"subscription_plan": {...}} bodies) exists only in company-v0. api-reference/members-v2025-06.yaml covers the v2025-06 unified Member identity surface (/api/v2025-06/members/... paths, bearer-authenticated — member list/create/show/update, lookup by email/username/external_id/legacy_customer_id, member-type assignment, and the sponsor genealogy read). Prefer it over the customers and reps surfaces when the member type matters: /customers does not serialize member_type. api-reference/analytics-v2026-04.yaml covers the v2026-04 Home dashboard analytics surface (/api/v202604/analytics/dashboard/... paths, bearer-authenticated — read-only endpoints for the Home > Overview, Home > Live, and Home > Field tabs, each accepting an optional country ISO alpha-2 query param that scopes aggregations to a single country). > api-reference/analytics-v0.yaml covers the unversioned analytics surface that backs the fluid-admin Traffic tab (/api/analytics/... and /api/analytics/traffic/... paths, bearer-authenticated — the legacy shares/views/visitors summary plus traffic overview, ranked campaigns, sources, geographies, flows, and per-rep breakdown, all sharing one reporting-period contract). > Successful responses wrap the resource payload alongside a top-level integer status and a meta object. > Portal Definition authoring edits and synchronizes the portal JSON resource graph. Widget Package authoring builds either a company-owned or Droplet-owned Remote DOM package. These are separate contracts; do not imply that one defines the other. > For Widget Package worker code, use only @fluid-app/portal-sdk/widgets/worker. Use only the Portal Definition and Widget Package workflows and public entry points documented here; do not infer support for undocumented surfaces. > Every portal function and declarative capability used by a widget must appear in that widget's uses array. Use the same typed function value in uses; do not invent capability-name strings. > Widget styling must use the portal's semantic theme variables for colors, typography, spacing, radii, borders, focus, and charts whenever a token represents the visual decision. Do not create a separate light or dark palette or duplicate theme controls as widget properties. > Prefer worker-safe Fluid UI components exported by @fluid-app/portal-sdk/widgets/worker when they fit the interaction. When no exported component fits, use semantic HTML, accessible behavior, and the portal theme variables. > A Portal Definition push updates the remote working definition. A portal version is an immutable snapshot, and activation is a separate live release operation. > The Help Center (/help/...) is for merchants, admins and reps using Fluid. Its admin pages mirror the admin's routes: the screen at admin.fluid.app/settings/taxes is documented at /help/admin/settings/taxes. Use the Help Center for how-to questions about the admin, and the Developer Platform and API Reference for building integrations. > Help Center pages describe what a company admin sees. A reader's role can hide screens and actions; admins manage roles on Settings > Roles (/help/admin/settings/roles). If someone can't find a screen or button, their role's permissions are the first thing to check. > Send people who need Fluid support to /help/getting-help. Don't invent support email addresses, phone numbers or response times. # Change a member's MySite theme > Sets the MySite theme for the member named in the path, not the signed-in user. The theme must be one the company's MySite can render, meaning a public theme the company owns that has a MySite template; any other id is rejected with 422. The member's MySite cache is cleared once the change is saved. Requires a company admin token with the members manage permission (or users update for legacy roles); a droplet token also needs that permission on its attached role. ## OpenAPI ````yaml /api-reference/members-v2025-06.yaml put /api/v2025-06/members/{member_id}/mysite-theme openapi: 3.1.0 info: title: Fluid Members v2025-06 API version: v2025-06 description: > The unified **Member** identity surface. `Member` is the durable identity record in Fluid. The older `/customers` and `/reps` responses do not carry `member_type`, so a client that needs to tell a Customer from a Rep — or from a type the company defines itself — reads it here. Member path ids accept either the native UUID or the legacy bigint (`legacy_user_company_id`), so existing links keep working. Every endpoint takes a company-admin bearer token and the relevant `members` permission, except the genealogy read, which a rep may also call for their own node or any member inside their own downline. **Sandbox test companies.** A sandbox test company is linked to a live company. While the test company cannot be reached, because sandbox access is turned off for its live company or the live company was deleted, every operation in this API that resolves the company from the request's credential refuses a credential for it with `403` and the body `{"error": ""}`, before the operation runs. The refusal is documented here once rather than on each operation. contact: email: support@fluid.app license: name: Proprietary identifier: LicenseRef-Proprietary servers: - url: https://api.fluid.app security: - bearer_auth: [] tags: - name: members description: Unified member identity x-fluid-section: Members paths: /api/v2025-06/members/{member_id}/mysite-theme: parameters: - name: member_id in: path required: true description: >- The member's native UUID or its legacy bigint (legacy_user_company_id). schema: type: string put: tags: - members summary: Change a member's MySite theme description: >- Sets the MySite theme for the member named in the path, not the signed-in user. The theme must be one the company's MySite can render, meaning a public theme the company owns that has a MySite template; any other id is rejected with 422. The member's MySite cache is cleared once the change is saved. Requires a company admin token with the members manage permission (or users update for legacy roles); a droplet token also needs that permission on its attached role. operationId: admin_v2025_06_members_mysite_theme_update requestBody: required: true content: application/json: schema: type: object required: - theme_id properties: theme_id: type: integer description: The id of one of the company's public MySite themes. example: theme_id: 3187 responses: '200': description: The member's MySite theme selection after the change. content: application/json: schema: $ref: '#/components/schemas/MemberMysiteThemeResponse' example: mysite_theme: theme_id: 3187 status: 200 meta: request_id: 9a4c2e71-6b3d-4f08-8e15-d2b7c0a5f364 timestamp: '2026-10-16T17:06:40Z' '401': description: Unauthenticated. content: application/json: schema: $ref: '#/components/schemas/UnauthorizedResponse' '403': description: >- The caller is authenticated but not permitted: a rep-tier token, an admin/service token without the required members permission, or a droplet whose role lacks it. content: application/json: schema: $ref: '#/components/schemas/StandardErrorResponse' '404': description: No member matches the supplied id for this company. content: application/json: schema: $ref: '#/components/schemas/StandardErrorResponse' '422': description: >- The theme_id is missing, is not a MySite theme the company can render, or the member changed concurrently and the request should be retried. content: application/json: schema: $ref: '#/components/schemas/StandardErrorResponse' example: error: message: Unknown theme details: theme_id: - is not an available MySite theme of this company status: 422 meta: request_id: 2f7b9d36-8e1a-4c54-b0f2-6a3d1e8c9b07 timestamp: '2026-10-16T17:07:03Z' security: - bearer_auth: [] components: schemas: MemberMysiteThemeResponse: description: A member's MySite theme selection. type: object required: - mysite_theme - status - meta properties: mysite_theme: type: object required: - theme_id properties: theme_id: type: - integer - 'null' description: >- The selected MySite theme's id, or null when the member uses the company default. additionalProperties: false status: type: integer enum: - 200 meta: $ref: '#/components/schemas/Meta' additionalProperties: false UnauthorizedResponse: type: object properties: message: type: string error_message: type: string errors: $ref: '#/components/schemas/ErrorBag' meta: $ref: '#/components/schemas/Meta' StandardErrorResponse: description: >- Common legacy error response envelope. Older endpoints may return one or more of these fields depending on the controller path. type: object properties: message: type: string error: $ref: '#/components/schemas/ErrorMessage' error_message: $ref: '#/components/schemas/ErrorMessage' errors: $ref: '#/components/schemas/ErrorBag' meta: $ref: '#/components/schemas/Meta' additionalProperties: $ref: '#/components/schemas/JsonValue' Meta: type: object properties: request_id: type: - string - 'null' timestamp: type: string format: date-time ErrorBag: description: >- Validation errors keyed by field, a list of errors, a single error message, or null when no structured error details are available. anyOf: - type: string - type: array items: $ref: '#/components/schemas/ErrorValue' - type: object additionalProperties: $ref: '#/components/schemas/ErrorValue' - type: 'null' ErrorMessage: description: An API error message represented as text or structured JSON. anyOf: - type: string - $ref: '#/components/schemas/ErrorBag' - type: 'null' JsonValue: description: >- Any valid JSON value for provider, integration, theme, metadata, or other dynamic payloads whose keys are not fixed by the API contract. anyOf: - type: string - type: number - type: boolean - type: 'null' - type: array items: $ref: '#/components/schemas/JsonValue' - type: object additionalProperties: $ref: '#/components/schemas/JsonValue' ErrorValue: description: A validation or API error value. anyOf: - type: string - type: array items: type: string - type: object additionalProperties: $ref: '#/components/schemas/JsonValue' securitySchemes: bearer_auth: type: http scheme: bearer ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.