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

# Cancel subscription

> Cancel the active subscription for the authenticated tenant at the end of the current billing period.

```http theme={null}
POST /v1/billing/cancel
```

Cancels your active subscription. The cancellation takes effect at the end of the current billing period — you retain full access until then. After the period ends, your account downgrades to the Developer (free) plan.

## Response

Returns the updated subscription object with `cancel_at_period_end` set to `true`.

<ResponseField name="status" type="string">
  Subscription status. Remains `active` until the period ends, then changes to `canceled`.
</ResponseField>

<ResponseField name="plan_key" type="string">
  The current plan identifier (e.g., `plan_starter`, `plan_business`).
</ResponseField>

<ResponseField name="current_period_end" type="string">
  ISO 8601 timestamp for when the current billing period ends and the cancellation takes effect.
</ResponseField>

<ResponseField name="cancel_at_period_end" type="boolean">
  `true` after a successful cancellation request.
</ResponseField>

<Warning>
  Cancellation is immediate but takes effect at the end of your billing period. You cannot undo a cancellation via the API — to resubscribe, create a new [checkout session](/api-reference/billing/checkout).
</Warning>


## OpenAPI

````yaml mint-openapi.yaml POST /v1/billing/cancel
openapi: 3.0.3
info:
  title: Truthlocks API
  description: >
    Truthlocks is a universal verification infrastructure for documents,
    credentials, and digital assets.

    This specification defines the canonical API for interacting with Truthlocks
    services.


    ## Base URLs

    - **Production**: `https://api.truthlocks.com`

    - **Sandbox**: `https://sandbox-api.truthlocks.com`


    ## Authentication

    - **API Keys**: Use `X-API-Key` header for machine-to-machine operations

    - **Bearer Tokens**: Use `Authorization: Bearer <jwt>` for user-initiated
    operations


    ## Tenant Identity

    In production, tenant identity is derived from the authenticated context
    (API key or JWT).

    The `X-Tenant-ID` header is ignored in production to prevent spoofing.
  version: 1.0.0
  contact:
    name: Truthlocks Support
    url: https://truthlocks.com/support
    email: support@truthlocks.com
servers:
  - url: https://api.truthlocks.com
    description: Production API
  - url: https://sandbox-api.truthlocks.com
    description: Sandbox Environment
security:
  - APIKey: []
tags:
  - name: Authentication
    description: API key and token management
  - name: Issuers
    description: Issuer registration and trust management
  - name: Keys
    description: Cryptographic key management for issuers
  - name: Attestations
    description: Attestation lifecycle (mint, revoke, supersede)
  - name: Verification
    description: Attestation verification and proof bundles
  - name: Governance
    description: Issuer governance workflows (admin only)
  - name: Identity
    description: Organization, user, and role management
  - name: Audit
    description: Audit event queries
  - name: Platform
    description: Platform administration (super admin only)
  - name: Platform Review
    description: Staff review workflows for issuer applications
  - name: Tenant Console
    description: Tenant profile and lifecycle endpoints
  - name: Health
    description: Service health and readiness endpoints
  - name: Risk
    description: Risk signal ingestion and fraud detection
  - name: Risk Enforcement
    description: Risk enforcement actions — block, challenge, quarantine, and configuration
  - name: Billing
    description: Billing, subscription, and addon management
  - name: Machine Identity
    description: >-
      Machine Agent Identity Protocol (MAIP) — agent registration, sessions,
      trust, witness, compliance, orchestration, and observability
externalDocs:
  description: Transparency read-only API (separate service spec)
  url: >-
    https://github.com/truthlocks/truthlock/blob/main/docs/transparency/openapi.yaml
paths:
  /v1/billing/cancel:
    post:
      tags:
        - Billing
      summary: Cancel subscription
      description: >-
        Cancels the active subscription at the end of the current billing
        period.
      operationId: billing.cancel
      requestBody:
        content:
          application/json:
            schema:
              type: object
              properties:
                reason:
                  type: string
                  description: Optional cancellation reason
                immediate:
                  type: boolean
                  description: If true, cancel immediately instead of at period end
      responses:
        '200':
          description: Cancellation confirmed
          content:
            application/json:
              schema:
                type: object
                properties:
                  status:
                    type: string
                  cancels_at:
                    type: string
        '401':
          description: Authentication required
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorEnvelope'
      security:
        - APIKey: []
components:
  schemas:
    ErrorEnvelope:
      type: object
      required:
        - code
        - message
        - http_status
      properties:
        code:
          type: string
          description: Machine-readable error code
          enum:
            - AUTH_REQUIRED
            - AUTH_INVALID
            - PERMISSION_DENIED
            - TENANT_IDENTITY_UNVERIFIED
            - NOT_FOUND
            - VALIDATION_ERROR
            - CONFLICT
            - PAYLOAD_TOO_LARGE
            - RATE_LIMIT_EXCEEDED
            - QUOTA_EXCEEDED
            - SERVICE_UNAVAILABLE
            - INTERNAL_ERROR
        message:
          type: string
          description: Human-readable error message
        http_status:
          type: integer
          description: HTTP status code
        retry_after_ms:
          type: integer
          description: Milliseconds to wait before retrying (for rate limits)
        details:
          type: object
          description: Additional error context
      example:
        code: AUTH_REQUIRED
        message: Authentication required
        http_status: 401
  securitySchemes:
    APIKey:
      type: apiKey
      in: header
      name: X-API-Key
      description: API key for machine-to-machine authentication

````