write_app_file — Fine Structure MCP Tool Mutating
write_app_file
(write app file) is one of 84 tools on the
Fine Structure
MCP server. Connect the server and your client discovers it on the handshake.
by client
How to call write_app_file from your client
- Claude Code Fine Structure write_app_file run in your project directory
- Claude Desktop Fine Structure write_app_file ~/Library/Application Support/Claude/claude_desktop_config.json
- Cursor Fine Structure write_app_file ~/.cursor/mcp.json
- VS Code Fine Structure write_app_file .vscode/mcp.json
- Zed Fine Structure write_app_file ~/.config/zed/settings.json
- Windsurf Fine Structure write_app_file ~/.codeium/windsurf/mcp_config.json
- Cline Fine Structure write_app_file ~/Library/Application Support/Code/User/globalStorage/saoudrizwan.claude-dev/settings/cline_mcp_settings.json
- Gemini CLI Fine Structure write_app_file ~/.gemini/settings.json
- Grok Fine Structure write_app_file .mcp.json (in your project root)
- ChatGPT Fine Structure write_app_file Settings → Connectors → Advanced → Developer mode
- Claude.ai Fine Structure write_app_file Settings → Connectors → Add custom connector
- LangChain Fine Structure write_app_file pip install langchain-mcp-adapters
Fastest route
claude mcp add --transport http fine-structure https://finestructure.ai/api/mcpOther tools on this server
- create_app
- agency_create_client
- agency_list_clients
- agency_create_client_app
- agency_create_claim_link
- agency_get_claim_status
- update_app
- publish_app
- get_platform_guide
- get_recommended_workflow
- get_job_status
- get_app_status
- get_app_links
- list_app_domains
- set_app_subdomain
- check_subdomain_available
- add_custom_domain
- get_domain_verification
- check_domain_verification
- set_primary_domain
- remove_custom_domain
- get_domain_ssl_status
- configure_domain_redirects
- list_apps
- get_app_files
- read_app_file
- read_app_files
- patch_app_file
- rename_app_file
- get_app_detail
- get_entities
- query_entity
- seed_entity
- create_entity_records
- update_entity_record
- update_entity_records
- delete_entity_records
- get_pages
- get_errors
- get_app_analytics
- get_preview_url
- list_saved_versions
- create_change_set
- add_file_change
- validate_change_set
- apply_change_set
- discard_change_set
- validate_app
- inspect_preview
- get_app_security_context
- set_route_policy
- set_entity_policy
- list_app_members
- invite_app_member
- update_app_member_role
- remove_app_member
- get_app_security_audit
- compare_saved_versions
- compare_current_to_version
- restore_file_from_version
- create_entity_schema
- update_entity_schema
- validate_entity_relationships
- update_entity_metadata
- list_secret_keys
- set_secret
- delete_secret
- list_integrations
- configure_integration
- list_ab_tests
- create_ab_test
- update_ab_test
- delete_ab_test
- get_ab_test_stats
- create_agent
- list_agents
- schedule_agent_task
- list_agent_tasks
- get_agent_whatsapp
- start_owner_phone_verification
- confirm_owner_phone_verification
- attach_agent_whatsapp
- detach_agent_whatsapp
This list was read from the server itself, by connecting to it and calling tools/list on 24 September 2026. It is what
the server actually exposes, not what its listing claims.
Mutating and Read-only are read off each tool's name, not its schema — a hint, not a guarantee. The registry stores tool names only; connect the server for its live schemas.