Headless Backend

Headless Backend for Internal Tools
and Client Projects

Define templates and attributes in Omnismith, then use the generated REST API, OpenAPI spec, project isolation, access control, and audit history as the backend surface. Your team can spend its time on the UI and domain logic instead of scaffolding the same backend services again.

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What Teams Use Omnismith to Avoid Rebuilding

Most internal tools and client backends repeat the same infrastructure work: define the schema, expose CRUD endpoints, add permissions, document the API, and bolt on change history later. Omnismith moves that repeated work into one product so the backend layer is ready before the custom UI is finished.

  • ✓ Schema, CRUD API, and access control in one system instead of separate scaffolding steps
  • ✓ Audit history recorded on every write instead of custom log tables or ad hoc triggers
  • ✓ Project-scoped isolation for clients, departments, or environments
  • ✓ OpenAPI-backed endpoints your frontend and integration code can use immediately

Core backend plumbing without rebuilding it every time

REST API with OpenAPI Spec

Every entity template generates typed API endpoints. Browse and test via Swagger UI at swagger.omnismith.io.

Custom Schemas — No Migrations

Define attributes (7 data types + lists + references) and templates that map to your domain. Add or remove fields any time with no migrations.

Role-Based Access Control

Assign per-template, per-entity, or per-feature permissions. Build multi-tenant apps where each client sees only their own data.

Personal Access Tokens

Generate tokens with the omni_* prefix for your frontend or CI/CD pipeline. Revoke at any time from the security dashboard.

Automatic Audit History

Every API write is logged with the author, timestamp, and changed values. Your clients get a full change history with no extra work.

Automations & Webhooks

Fire webhooks to your app when data changes. Connect Omnismith events to your own backend, Slack, or any HTTP endpoint.

From Schema to API in Minutes

  1. 1

    Define your template

    Create attributes for your domain (Product, Order, User, Asset) with the right data types — string, number, date, file, list, reference.

  2. 2

    Generate an access token

    Create a personal access token (omni_*) scoped to the right permissions.

  3. 3

    Start making API calls

    Use the REST API to create, read, update, and delete entities. Check the OpenAPI spec for all available endpoints and request schemas.

  4. 4

    Connect your frontend

    Fetch entity lists, render detail views, submit forms — all backed by Omnismith without a custom API server.

# Search entities by template 

POST https://api.omnismith.io/v1/entities/search/{template_id}?limit=20&offset=0
Authorization: Bearer omni_your_token_here
Content-Type: application/json

{
    "global_search": null,
    "filters": []
}

# Response
{
  "data": [
    {
            "id": "018b2f1b-8c1a-75b3-8000-7f0000010001",
            "template_id": "018b2f1b-8c1a-75b3-8000-7f0000010000",
            "created_at": "2026-02-23T10:00:00+00:00",
            "updated_at": "2026-02-23T10:05:00+00:00",
            "attribute_values": {
                "018b2f1b-8c1a-75b3-8000-7f0000010002": {
                    "value": "Product A",
                    "custom_value": null,
                    "reference_entity_id": null
                }
    }
    }
  ],
    "total": 1,
    "limit": 20,
    "offset": 0
}

# Update entity attributes 

PUT https://api.omnismith.io/v1/entities/{id}
Authorization: Bearer omni_your_token_here
Content-Type: application/json

{
  "attribute_values": [
    {
            "attribute_id": "018b2f1b-8c1a-75b3-8000-7f0000010003",
      "value": "49.99"
    },
    {
            "attribute_id": "018b2f1b-8c1a-75b3-8000-7f0000010004",
      "value": "true"
    }
  ]
}

# Response: 204 No Content

Client and Team Permissions with Project Isolation

Each Omnismith project is its own namespace for templates, entities, members, and permissions. Use one project per client, internal team, or environment so access stays clear and tokens never cross boundaries by accident.

Client A Workspace

  • • Operations records and client-specific templates
  • • Client admin plus scoped contributor access
  • • Project-scoped API tokens

Client B Workspace

  • • Independent schema and entity set
  • • Separate editors and reviewers
  • • No cross-project data exposure

Internal Ops Workspace

  • • Shared workflow templates for internal teams
  • • Role-based access by function
  • • Same platform, separate operational scope

Data from one project is never accessible from another. Access tokens are project-scoped.

Start from a Reusable Structure, Not a Blank Schema

Omnismith already has proof assets and reusable starting points around the kinds of systems teams build most often. Start with one of those patterns, then adapt the schema and API shape to your actual workflow.

Blueprint Marketplace

See how reusable project structures reduce repeated backend setup work.

IT Asset Management

See a schema-driven backend shape for assets, licenses, contracts, and audit history.

Server Monitoring

See how metadata, metric timelines, and alert rules can live in the same backend model.

Audit History

See how explainable record history fits into operational backends by default.

Further Reading

Two published posts give the clearest background for this page. One explains the platform model behind schema-driven operational systems. The other explains why reusable project structures matter once teams stop rebuilding the same backend shape from scratch.

Read the flexible schema article Read the blueprint marketplace article

Who Uses Omnismith as the Backend Layer

Freelancers & Agencies

Ship client backends faster. Use Omnismith for the API, access rules, and audit trail while you focus on the client UI and workflow design.

Startup MVPs

Launch the data layer early. Schema updates, API access, and permissions stay in one system while the product model is still changing quickly.

Internal Tool Builders

Give ops, finance, and support teams structured records with permissions while engineers keep direct API access for custom frontends and integrations.

Companies Replacing Spreadsheets

Move past uncontrolled sheets without committing to a full backend build. Keep structure, access control, and history from the first version onward.

Start Building Your Backend Today

Free tier includes 150 entities, REST API access, and an OpenAPI spec. Start with one internal tool or client project, then expand the schema as the workflow gets more specific.

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