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

# Resolve a file to the job that created it

> Given a `file_id` or a varg URL, returns the job that produced the file
together with its recipe (prompt, model, tool, cost) — so an agent can
"create something similar".




## OpenAPI

````yaml /openapi.yaml post /lineage
openapi: 3.1.0
info:
  title: varg API
  version: 2.0.0
  description: |
    Unified REST API for AI media generation at `api.varg.ai/v2`.

    One API key, ~80 models across 8 providers, async jobs, stable output URLs
    on `s3.varg.ai`, files with lineage, and transparent credit billing
    (1 credit = 1 cent = $0.01).

    **The async job pattern:** every generation request returns `202 Accepted`
    with a job object (`status: queued`). Poll `GET /jobs/{id}` until the job
    reaches a terminal status (`completed`, `failed`, or `cancelled`), then read
    `output.outputs[0].url`. Alternatively, set `options.webhook_url` in the
    request to receive an HMAC-signed callback when the job finishes.
servers:
  - url: https://api.varg.ai/v2
security:
  - bearerAuth: []
tags:
  - name: Generation
    description: >-
      Create generation jobs (image, video, speech, music, transcription,
      ffmpeg, render, pipeline)
  - name: Tools
    description: Discover tools, their schemas, and call any tool generically
  - name: Jobs
    description: Poll and manage job lifecycle
  - name: Files
    description: Upload, import, probe, and manage files
  - name: Lineage
    description: Resolve which job produced a file
  - name: Pricing
    description: Estimate costs and browse the price catalog
  - name: Billing
    description: Balance, usage, and transaction history
  - name: Account
    description: Identity and API key management
paths:
  /lineage:
    post:
      tags:
        - Lineage
      summary: Resolve a file to the job that created it
      description: |
        Given a `file_id` or a varg URL, returns the job that produced the file
        together with its recipe (prompt, model, tool, cost) — so an agent can
        "create something similar".
      operationId: getLineage
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                file_id:
                  type: string
                url:
                  type: string
                  format: uri
            examples:
              by-id:
                value:
                  file_id: file_abc123
              by-url:
                value:
                  url: https://s3.varg.ai/files/acc_x/file_abc.png
      responses:
        '200':
          description: Lineage
          content:
            application/json:
              schema:
                type: object
                properties:
                  file_id:
                    type: string
                  job_id:
                    type: string
                  tool:
                    type: string
                  input:
                    type: object
                    description: The job's input (prompt, model, code, ...)
        '404':
          description: File not found or no job linked
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
components:
  schemas:
    ErrorResponse:
      type: object
      properties:
        error:
          type: object
          properties:
            code:
              type: string
              example: model_not_found
            message:
              type: string
              example: 'Unknown model: flux-shnell'
            details: {}
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: |
        varg API key (`varg_...`). Get one at [app.varg.ai](https://app.varg.ai)
        or run `bunx vargai login`. App sessions may alternatively send a
        Supabase JWT.

````