Andrew Adams
Andrew AdamsยทCo-Founder & Operations at Wireflow

Batch Image Generation API

Execute image generation workflows at scale through a single REST endpoint with async polling and webhook delivery

Explore the API
Batch Image Generation API
Batch Image Generation ๏ฟฝ Flux 2 ProOpen workflow

At Wireflow, Andrew and the team have built and iterated on 300+ batch image generation api workflows for creative teams and agencies. The approach below reflects what we've found delivers the most consistent, production-ready results.

Built on 300+ internal test generations during development
12+ AI models benchmarked for optimal output quality
40+ configurations tested to find the best defaults

Generate Images at Scale with One API Call

Wireflow's batch image generation API lets you POST a workflow execution with all your prompts to /api/v1/workflows/{id}/execute and receive an executionId for async polling. The system handles queuing, per-plan rate limits (10 executions per minute on every tier), and returns structured node outputs when processing completes. This is the same pattern used across all [batch AI generation](https://www.wireflow.ai/features/batch-ai-generation) workflows on the platform.

Each workflow is a directed graph of nodes you connect on a visual canvas, then trigger via REST or webhook. You can chain generation nodes like Flux 2 Pro, Recraft V4, or Imagen 4 with post-processing steps such as upscaling or background removal, all exposed as a single callable endpoint. Explore how pipelines connect models in the [AI model chaining](https://www.wireflow.ai/features/ai-model-chaining) feature overview.

Batch Generation Capabilities

๐Ÿ“ฆ

Async Execute and Poll

POST to /workflows/{id}/execute, receive an executionId, then poll /executions/{id}/poll until status returns COMPLETED with node outputs

๐Ÿ”—

Chained Node Pipelines

Connect generate, edit, and utility nodes in a single workflow graph. Each batch runs through every node in sequence automatically

โšก

Webhook Trigger Support

Fire workflows from external systems via POST /workflow/{webhookId}/trigger with no API key required, ideal for forms or CI pipelines

๐ŸŽ›๏ธ

Per-Node Parameters

Set different model types, resolutions, and style parameters for each node. Override defaults per execution via the request body

๐Ÿ”„

Idempotent Execution

Include an Idempotency-Key header on execute requests to prevent duplicate runs. Identical keys within 24 hours replay the original response

๐Ÿ“Š

Credit and Usage Tracking

Every 402 response includes a per-node credit breakdown with nodeId, nodeLabel, and cost. Monitor usage via the executions:read scope

More Than Just Batch Image Generation API

One Endpoint, Any Model

Access Flux 2 Pro, Recraft V4, Imagen 4, and Nano Banana 2 through a single workflow endpoint. Swap models on the canvas without changing your integration code. Browse all options in the AI image generator toolkit.

One Endpoint, Any Model

No SDK Required

Wireflow is plain REST and JSON with no official SDK to install. Use curl, fetch, or any HTTP client to authenticate with a Bearer sk- token and start executing. See how teams simplify their stack with Midjourney alternatives.

No SDK Required

Scale Ad Creative Production

Generate hundreds of ad variations by executing a single workflow with different prompt inputs per run. Pair batch generation with AI ad generation workflows for end-to-end creative automation.

Scale Ad Creative Production

Tiered Rate Limits

All plans support 10 executions per minute, with daily caps scaling from 50 on Free to unlimited on Enterprise. Response headers include X-RateLimit-Remaining so you can throttle gracefully. Review options on the enterprise plan page.

Tiered Rate Limits

Full Pipeline Visibility

Every execution returns per-node timing, credit cost, and output data. The GET /executions/{id} endpoint gives you a complete audit trail for each batch run. Compare tools in best AI ad generators for social media.

Full Pipeline Visibility
Open Platform

Build Any AI Workflow

15+

AI Models Integrated

No Watermarks

Full Commercial License

FAQs

What is a batch image generation API?
A batch image generation API accepts multiple prompts or inputs in one request and processes them asynchronously, returning all generated images through polling or webhook delivery instead of requiring individual calls.
How many images can I generate per execution?
Each workflow execution processes the full node graph per run. Daily execution limits range from 50 on the Free plan to unlimited on Enterprise, with all plans capped at 10 executions per minute.
Which image models support batch generation?
All image generation nodes work in batch workflows, including Flux 2 Pro, Recraft V4, Imagen 4, Nano Banana 2, and SeDream V4. Select any model node on the canvas and connect it to your pipeline.
How do I authenticate API requests?
Generate an API key starting with sk- from your dashboard under Settings. Include it as a Bearer token in the Authorization header. Webhook trigger endpoints are the only calls that skip authentication entirely.
Can I trigger batches without an API key?
Yes, webhook-triggered workflows accept POST requests to /workflow/{webhookId}/trigger with no authentication required. This makes it simple to connect external forms, Zapier automations, or CI/CD pipelines to your generation workflow.
How do I check execution status?
Poll the GET /workflows/executions/{id}/poll endpoint using exponential backoff, starting at one second and capping at ten seconds between attempts. The response returns RUNNING, COMPLETED with node outputs, or FAILED with error details.
What happens if I run out of credits mid-batch?
The API returns a 402 status with an insufficientCredits flag and a per-node credit breakdown showing exactly which node needs how many credits, so you can adjust your plan before retrying.
Can I prevent duplicate batch executions?
Yes, include an Idempotency-Key header on your execute request. Identical keys submitted within a 24-hour window replay the original response without triggering a duplicate workflow execution or consuming additional credits.

More From Wireflow

Batch AI GenerationLearn moreMidjourney AlternativeLearn moreBest AI Image Editors ComparedLearn moreAI Photo EnhancerLearn moreWireflow PricingLearn more
Andrew Adams

Written by

Andrew Adams

Co-Founder & Operations at Wireflow

Runs client operations and content strategy at Wireflow. Works directly with creative teams and agencies to build production AI workflows.

Content StrategyClient Operations

Start Generating Images at Scale

Build visual image pipelines, connect any supported model, and execute them through Wireflow's REST API. Process batches with async polling, webhook triggers, and per-node cost tracking.

Explore the API