Hedra · Arazzo Workflow

Hedra — Generate an image from a text prompt

Version 1.0.0

Submit an image generation and poll until the image is ready.

1 workflow 1 source API 1 provider

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Provider

hedra

Workflows

generateImage

Create an image generation from a text prompt and poll for the result.

Uses model_slug to select an image model, submits a generation (type=image), then polls the status endpoint until status is complete and reads the output URL.

2 steps inputs: api_key, aspect_ratio, model_slug, text_prompt outputs: generation_id, url

submitImage

generate_asset_public_generations_post

Submit the image generation job.

pollStatus

get_status_public_generations__generation_id__status_get

Poll until the generation completes.

Source API Descriptions

openapi

hedra https://raw.githubusercontent.com/api-evangelist/hedra/refs/heads/main/openapi/hedra-web-api-openapi-original.json

Arazzo Workflow Specification

arazzo: 1.0.1
info:
  title: Hedra — Generate an image from a text prompt
  version: 1.0.0
  summary: Submit an image generation and poll until the image is ready.
sourceDescriptions:
- name: hedra
  url: ../openapi/hedra-web-api-openapi-original.json
  type: openapi
workflows:
- workflowId: generateImage
  summary: Create an image generation from a text prompt and poll for the result.
  description: >-
    Uses model_slug to select an image model, submits a generation (type=image), then polls the
    status endpoint until status is complete and reads the output URL.
  inputs:
    type: object
    required: [api_key, text_prompt]
    properties:
      api_key:
        type: string
        description: Hedra API key sent as X-API-Key.
      text_prompt:
        type: string
      model_slug:
        type: string
        default: ""
      aspect_ratio:
        type: string
        default: "16:9"
  steps:
  - stepId: submitImage
    description: Submit the image generation job.
    operationId: generate_asset_public_generations_post
    parameters:
    - name: X-API-Key
      in: header
      value: $inputs.api_key
    requestBody:
      contentType: application/json
      payload:
        type: image
        text_prompt: $inputs.text_prompt
        model_slug: $inputs.model_slug
        aspect_ratio: $inputs.aspect_ratio
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      generation_id: $response.body#/id
  - stepId: pollStatus
    description: Poll until the generation completes.
    operationId: get_status_public_generations__generation_id__status_get
    parameters:
    - name: X-API-Key
      in: header
      value: $inputs.api_key
    - name: generation_id
      in: path
      value: $steps.submitImage.outputs.generation_id
    successCriteria:
    - condition: $statusCode == 200
    - context: $response.body
      condition: $.status == "complete"
      type: jsonpath
    outputs:
      status: $response.body#/status
      url: $response.body#/url
      download_url: $response.body#/download_url
  outputs:
    generation_id: $steps.submitImage.outputs.generation_id
    url: $steps.pollStatus.outputs.url