> ## Documentation Index
> Fetch the complete documentation index at: https://docs.tallychannel.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Create Tenant

> Creates a new tenant and bootstraps the calling principal as its first
`tenant_admin`. The tenant becomes the owner of subjects created under it.




## OpenAPI

````yaml POST /v1/tenants
openapi: 3.1.0
info:
  title: Tally Platform API
  version: '1.0'
  description: >
    The Tally Platform API is a versioned REST API for managing business
    identity

    state, counterparty access grants, and refresh workflows.


    All tenant-scoped endpoints require an `Authorization: Bearer <token>`
    header

    containing a valid Firebase Auth JWT. Tokens are issued by Google Identity

    Platform (GCIP) after sign-in at your environment's app domain.


    **Base URLs**

    | Environment | URL |

    |-------------|-----|

    | Staging | `https://tally-platform-api-xwka6vu2kq-ue.a.run.app` |

    | Production | `https://tally-platform-api-iikaevm4pq-ue.a.run.app` |
  contact:
    email: support@tallychannel.com
servers:
  - url: https://tally-platform-api-xwka6vu2kq-ue.a.run.app
    description: Staging
  - url: https://tally-platform-api-iikaevm4pq-ue.a.run.app
    description: Production
security:
  - BearerAuth: []
tags:
  - name: System
    description: Health checks and service metadata. No authentication required.
  - name: Tenants
    description: Tenant creation and member management.
  - name: Grants
    description: >-
      Access grant lifecycle — create, list, revoke. Controls which counterparty
      tenants can read which subjects.
  - name: Identity State
    description: >-
      Initial snapshot creation. Writes the first versioned state record for a
      subject.
  - name: Snapshots
    description: >-
      Read identity state — latest, history, by ID, export, chain proof, and
      diff.
  - name: Updates
    description: Propose and apply RFC 6902 patch updates to create new snapshot versions.
  - name: Transfer Offers
    description: Consensual `tenant_owner` role transfer handshake between principals.
  - name: Refresh Requests
    description: >-
      Counterparty-initiated requests for attribute updates or snapshot
      confirmation.
  - name: Webhooks
    description: Webhook subscription management and secret rotation.
paths:
  /v1/tenants:
    post:
      tags:
        - Tenants
      summary: Create a tenant
      description: >
        Creates a new tenant and bootstraps the calling principal as its first

        `tenant_admin`. The tenant becomes the owner of subjects created under
        it.
      operationId: createTenant
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                tenant_id:
                  type: string
                  description: Desired tenant ID. Must be unique across the platform.
                  example: acme-corp
                name:
                  type: string
                  example: Acme Corporation
              required:
                - tenant_id
      responses:
        '201':
          description: Tenant created.
          content:
            application/json:
              schema:
                type: object
                properties:
                  tenant:
                    $ref: '#/components/schemas/TenantRecord'
        '400':
          $ref: '#/components/responses/ValidationError'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '409':
          description: A tenant with this ID already exists.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorEnvelope'
components:
  schemas:
    TenantRecord:
      type: object
      properties:
        tenant_id:
          type: string
        name:
          type: string
          nullable: true
        created_at:
          type: string
          format: date-time
    ErrorEnvelope:
      type: object
      properties:
        error:
          type: object
          properties:
            code:
              type: string
              description: Machine-readable error code.
              example: validation_error
            message:
              type: string
              description: Human-readable error message.
              example: Request body failed schema validation.
            details:
              type: array
              items:
                $ref: '#/components/schemas/ErrorDetail'
            request_id:
              type: string
              description: Request ID for tracing. Injected server-side.
              example: req_01j2k3m4n5
          required:
            - code
            - message
      required:
        - error
    ErrorDetail:
      type: object
      properties:
        path:
          type: string
          description: JSON Pointer to the field that caused the error.
          example: /subject_id
        message:
          type: string
          example: subject_id is required.
        code:
          type: string
          example: invalid_type
      required:
        - path
        - message
  responses:
    ValidationError:
      description: Request body or parameter failed validation.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorEnvelope'
          example:
            error:
              code: validation_error
              message: Request body failed schema validation.
              details:
                - path: /subject_id
                  message: subject_id is required.
    Unauthorized:
      description: Missing or invalid Bearer token.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorEnvelope'
          example:
            error:
              code: unauthorized
              message: Authentication required.
  securitySchemes:
    BearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: |
        Firebase Auth JWT issued by Google Identity Platform.
        Obtain a token by signing in at your app domain and calling
        `firebase.auth().currentUser.getIdToken()`.

````