ai.finestructure/fine-structure

Create a new application from a natural language prompt. The AI generates a complete web app with pages, components, styling, and data models. Returns a job_id - poll get_job_status to track progress. When the job is done, the app is ready.

Agency mode only. Create or update a client record for an account-level agent. This does not create a verified Fine Structure user account and does not transfer ownership.

Agency mode only. List client records and app handoff status for the authenticated agent.

Agency mode only. Create a new app owned by the agent, start generation, and create a claim link for the client. Ownership transfers only when the invited client logs in with the same email and accepts the claim link.

Agency mode only. Create a client claim link for an existing app owned by the agent. The client must log in with the invited email before ownership transfers.

Agency mode only. Inspect one handoff status without exposing the raw claim token.

Update an existing application with a new prompt. The AI modifies the app based on your instructions. Creates a Saved Version before the update. Returns a job_id - poll get_job_status to track progress.

Publish an app - freeze current state and make it live at a URL. Also configures whether the public URL is open, app-login gated, private, or inferred from the app.

Return a machine-readable Fine Structure / FSe2 guide for AI agents. Call this at the start of an MCP session to learn app files, entities, safe edit workflows, validation, publishing, A/B testing, secrets, and platform rules.

Return the recommended MCP tool sequence for a task type. Use this before creating apps, editing files, seeding data, publishing, setting up A/B tests, restoring versions, or configuring secrets/integrations.

Poll the status of an async generation job. Use this after create_app or update_app to know when the job is done. Returns status ('running' or 'done'), progress events, and result summary when complete.

Get app overview: files, published state, URL, active jobs.

Return editor, preview, published path, subdomain, and custom-domain links plus whether each works for anonymous visitors, app users, or Studio users based on publish and auth settings.

List an app's platform path, subdomain, and configured custom domain with verification, SSL, primary-domain, redirect, publish, and login-gating status.

Set or clear the app platform subdomain - the '<subdomain>.<base domain>' host Fine Structure already serves the app on. Runs the same ownership, format, reserved-name and uniqueness checks as the Studio subdomain field because it calls the same model function. Replacing a subdomain takes effect im…

Check whether a platform subdomain can be claimed before calling set_app_subdomain. Returns available plus a status of available, invalid, reserved, taken, current, or empty, with the exact reason. Pass app_id (an app you own) to have that app's own current subdomain reported as 'current' instead o…

Attach or replace the app custom domain through the same Fine Structure Studio custom-domain flow. Returns exact DNS verification and routing records for the user to configure at their DNS provider.

Return the exact DNS records and instructions required to verify and route the app custom domain.

Check Fine Structure custom-domain verification and SSL status for the configured custom domain, then save the latest status.

Set which app host should be treated as primary for generated links and custom-domain redirects.

Return SSL/certificate status and pending certificate validation DNS records for the app custom domain.

Configure custom-domain redirect policy: primary domain, optional www/root redirect, and HTTPS enforcement.

List applications owned by the authenticated user, newest activity first. Returns up to `limit` apps per call plus the total count; page with `offset` when the account has more.

Get the file tree for an app with paths and byte sizes.

Read one source file from an app's virtual filesystem. Paths follow the Fine Structure app file API, documented at https://finestructure.ai/api/mcp/docs.

Read several source files from an app's virtual filesystem. Paths follow the Fine Structure app file API, documented at https://finestructure.ai/api/mcp/docs.

Deep introspection of an app: entities, pages, settings, integrations, environment variables, and file structure. Use this to understand what an app contains before updating it.

Get all entity (data model) schemas for an app, with record counts. Each entity has fields, types, and relationships.

Query app data records for one entity with optional exact-match filters.

Compatibility tool for starter-record creation. Inserts directly for the authenticated app owner; by default it only seeds an empty entity (skip_if_not_empty).

Create/insert records in one app entity. Executes directly for the authenticated app owner and returns the created record ids.

Compatibility tool that updates one record by ID. Executes directly for the authenticated app owner.

Update exact records. Select explicit record_ids or exact-match filters and provide shared changes, or provide per-record updates. Executes directly for the authenticated app owner; expected_count aborts the write on a mismatch.

Get all pages in an app with their file paths and sizes.

Get recent runtime errors for an app (last 20). Useful for diagnosing issues before updating.

Traffic analytics for an app's published site over a chosen window: total views, unique visitors, daily series, top pages, top referrer domains and device split.

Return editor preview and published/public URLs for an app.

List restorable Saved Versions for an app, including versions created by MCP writes.

Create a staged file change set. Add multiple file changes, validate them as one app state, then apply atomically.

Stage one file upsert or delete inside a change set. Does not modify the live app until apply_change_set. Paths follow the Fine Structure app file API, documented at https://finestructure.ai/api/mcp/docs.

Validate current app files plus staged change set files before applying.

Apply a staged change set to the app. Creates a Saved Version before applying. Blocks on validation errors unless force=true.

Discard a pending staged change set without changing app files.

Run deterministic app checks: syntax, imports, routes/pages, entity schemas, missing entities, and recorded runtime errors.

Return server-side preview context: URLs, persisted runtime/network errors, static clickable candidates, pages, and explicit live-browser availability.

Return safe security context for one owned app: owner id/email, Studio collaborators, generated-app members, route policies, entity policies, and recent security audit entries. Does not return secrets and does not grant access to other apps.

Create or update a server-owned route policy for a generated app route.

Create or update server-side read/write role policy for an app entity.

List generated-app runtime users/members for an app. This is separate from Studio project collaborators.

Provision a generated-app runtime member with a role. This does not create a Studio collaborator, and the owner role cannot be assigned. password is required: ask the account owner which password the member should get. This tool never generates one, because a generated password would come back in t…

Update a generated-app runtime member role. This cannot assign owner and cannot change the Fine Structure account owner.

Read recent server-side security audit events for an app.

Compare two Saved Versions and return per-file additions, removals, modifications, and compact diffs.

Compare the current app files to a Saved Version and return compact per-file diffs.

Restore one file from a Saved Version instead of restoring the entire app. Creates a Saved Version before changing the file. Paths follow the Fine Structure app file API, documented at https://finestructure.ai/api/mcp/docs.

Create an entity schema file in entities/<Entity>.json. Creates a Saved Version before writing.

Replace or shallow-merge an existing entity schema file. Creates a Saved Version before writing.

Validate entity relationship metadata and *_id references against existing entity schemas.

Set relationship/index metadata on an entity schema. This stores metadata in the schema file; DB index creation is automatic where supported by the platform.

List secret key names for an app. Secret values are never returned.

Create or update one encrypted app secret. The secret value is never returned.

List supported integrations and safe connected integration metadata for an app. Tokens/secrets are never returned.

Store safe non-secret integration metadata for an app. Use set_secret for API keys/tokens.

List the platform A/B tests configured for an app.

Create a native Fine Structure A/B test between existing app pages. Use update_app first if a variant page still needs to be generated. Creates a Saved Version before the change.

Update a native A/B test, including active state, variants, traffic, and conversion goal. Creates a Saved Version before the change.

Get views, unique visitors, conversions, and conversion rates for an A/B test.

Create an autonomous AI agent on the user's Fine Structure account: a standing worker, not a chat session. It gets the platform's default safe tool policy and its own email address, it can read and write the app database, and once the owner phone is verified (see get_agent_whatsapp) it can message…

List the AI agents on the user's account with id, name, role, status and FineMail address.

Create a scheduled task for one of the user's agents. Supported schedule types: once (run_at ISO local time + timezone), interval (interval_minutes 5-1440), hourly, daily (time HH:MM + timezone), weekly (time + timezone + days_of_week 0=Sunday..6), cron (5-field expression + timezone), manual (only…

List scheduled tasks for one agent (or the whole account), including schedule, status and next_run_at.

Read the WhatsApp state of the connected account: whether the owner's phone is verified, which platform numbers they can connect, and which conversations already route to which agent. Call this first whenever the user asks to talk to an agent on WhatsApp, and repeat its next_step to them.

Send a 6-digit code over WhatsApp to the ACCOUNT OWNER's own phone. This is the one-time ownership proof required before a platform number can be connected, and it also unlocks agents messaging the owner. Ask the user for their own WhatsApp number first and send only to that. No WhatsApp Business a…

Confirm the 6-digit code the owner received on WhatsApp from start_owner_phone_verification. On success the owner is verified: agents can message them, and platform numbers become connectable.

Connect a platform WhatsApp number to one of the account's agents, so the owner can message that number and reach that agent. Requires the owner to be verified first. Take phone_number_id from get_agent_whatsapp. A number already used by another account is still valid to connect: it answers only th…

Disconnect the owner's WhatsApp route from a platform number. Removes only this account's route; other accounts sharing the number keep theirs.