> ## 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.

# Get Model Lineage

> Retrieve the full lineage graph for a model, including training datasets and parent models.

Returns the complete lineage graph for a model attestation. The graph includes all training datasets, parent models (for fine-tuned or distilled models), and downstream deployments connected by typed relationships.

Model lineage enables compliance teams to trace exactly which data was used to train a model, verify that all upstream datasets are properly attested, and audit the full provenance chain from raw data to production deployment.

### Authentication

<ParamField header="X-API-Key" type="string" required>
  API key with `models:read` scope. Alternatively, pass a Bearer JWT token in
  the `Authorization` header.
</ParamField>

<ParamField header="X-Tenant-ID" type="string" required>
  Tenant identifier for multi-tenant isolation.
</ParamField>

### Path Parameters

<ParamField path="id" type="string" required>
  Model attestation identifier (`maip-model:ULID`).
</ParamField>

### Response

<ResponseField name="model_id" type="string">
  The root model identifier for this lineage query.
</ResponseField>

<ResponseField name="nodes" type="array">
  Array of lineage nodes. Each node contains: - `id` (string) -- Resource
  identifier - `type` (string) -- Node type: `dataset`, `model`, or `deployment`

  * `name` (string) -- Human-readable name - `version` (string) -- Resource
    version - `status` (string) -- Current attestation status - `created_at`
    (string) -- ISO 8601 timestamp
</ResponseField>

<ResponseField name="edges" type="array">
  Array of relationships connecting nodes. Each edge contains: - `source`
  (string) -- Source node identifier - `target` (string) -- Target node
  identifier - `relationship` (string) -- Relationship type (e.g. `trained_on`,
  `fine_tuned_from`, `distilled_from`, `deployed_as`) - `metadata` (object) --
  Optional edge metadata
</ResponseField>

<ResponseField name="training_datasets" type="array">
  Convenience field listing all dataset nodes in the lineage that have a direct
  `trained_on` relationship with the queried model. Each entry contains `id`,
  `name`, `version`, and `status`.
</ResponseField>


## OpenAPI

````yaml mint-openapi.yaml GET /v1/models/{modelId}/lineage
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/models/{modelId}/lineage:
    get:
      tags:
        - Machine Identity
      summary: Get Model Lineage
      description: |
        Returns the full lineage for a model including training runs,
        training datasets, and parent models.
      operationId: maip.models.lineage
      parameters:
        - name: modelId
          in: path
          required: true
          schema:
            type: string
            format: uuid
          description: Model identifier
      responses:
        '200':
          description: Model lineage
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/MaipModelLineage'
        '401':
          description: Authentication required
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorEnvelope'
        '404':
          description: Model not found
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorEnvelope'
        '429':
          description: Rate limit exceeded
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorEnvelope'
      security:
        - APIKey: []
components:
  schemas:
    MaipModelLineage:
      type: object
      properties:
        model_id:
          type: string
          format: uuid
        training_runs:
          type: array
          items:
            type: object
            additionalProperties: true
        datasets:
          type: array
          items:
            $ref: '#/components/schemas/MaipDataset'
        parent_models:
          type: array
          items:
            $ref: '#/components/schemas/MaipModel'
    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
    MaipDataset:
      type: object
      properties:
        dataset_id:
          type: string
          format: uuid
        receipt_id:
          type: string
          format: uuid
        name:
          type: string
        hash:
          type: string
        format:
          type: string
        size_bytes:
          type: integer
          format: int64
        agent_id:
          type: string
          format: uuid
        metadata:
          type: object
          additionalProperties: true
        created_at:
          type: string
          format: date-time
    MaipModel:
      type: object
      properties:
        model_id:
          type: string
          format: uuid
        receipt_id:
          type: string
          format: uuid
        name:
          type: string
        hash:
          type: string
        framework:
          type: string
        version:
          type: string
        agent_id:
          type: string
          format: uuid
        training_dataset_ids:
          type: array
          items:
            type: string
            format: uuid
        created_at:
          type: string
          format: date-time
  securitySchemes:
    APIKey:
      type: apiKey
      in: header
      name: X-API-Key
      description: API key for machine-to-machine authentication

````