Developer API

Integrate AI Image Generation Into Your Applications

Build powerful visual experiences with the Foneloft API. Generate images from text prompts, edit visuals, upscale images, and automate creative workflows through a simple and scalable API.

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99.99% uptime
~ 4s p50 latency
REST · JSON

terminal · curl

curl https://api.foneloft.ai/v1/images/generate \
  -H "Authorization: Bearer sk_live_FL_8a3f9c..." \
  -H "Content-Type: application/json" \
  -d '{
    "prompt": "Aurora over a glass city",
    "model": "foneloft-xl-v3",
    "size": "1024x1024",
    "steps": 30
  }'

200 OK3.8s

{
  "id": "img_7Fq3...",
  "image_url": "https://..."
}

API keysk_live_FL_•••••

API Overview

Build with Foneloft.

The Foneloft API lets developers, startups, and enterprises drop AI-powered image generation into websites, mobile apps, SaaS products, and internal tools — with one stable REST endpoint.

Sub-second cold start
SOC 2 ready infrastructure
Stable v1 endpoints

REST · JSONv1 stableSDKs coming

What you can do

7 primitives

Generate Images from TextPrompt → pixel-perfect output
Edit Existing ImagesMask, inpaint, restyle
Remove BackgroundsStudio-grade cutouts
Upscale ImagesUp to 8× detail recovery
Create VariationsN samples in one call
Automate WorkflowsWebhooks & batch jobs
Build Custom AI AppsComposable primitives
Read the API docs
Quickstart in < 5 minutes

request200ms

POST /v1/images/generate
// 1 line, ship.

v1 stable

Core API Capabilities

Four endpoints, infinite possibilities.

One API surface — every primitive you need to ship rich visual experiences.

Text-to-Image API

Generate high-quality images from natural language prompts.

Endpointv1

POST /v1/images/generate

Features

Fast image generation
Multiple styles
Custom dimensions
High-resolution output
Batch generation

Example use cases

Design toolsMarketing platformsContent creation appsE-commerce solutions

Image Editing API

Modify existing images using AI-powered editing tools.

Endpointv1

POST /v1/images/edit

Features

Object removal
Object replacement
Background replacement
Style transformation
Image enhancement

Example use cases

Photo studiosDesign suitesE-commerce ops

Background Removal API

Automatically isolate subjects and remove backgrounds.

Endpointv1

POST /v1/images/remove-background

Features

Subject-aware masking
Edge-perfect output
Bulk processing
Transparent PNG export

Example use cases

Product photographyE-commerce platformsGraphic design toolsMarketing workflows

Image Upscaling API

Enhance image resolution while preserving quality and detail.

Endpointv1

POST /v1/images/upscale

Features

2× / 4× / 8× scaling
Improved clarity
High-quality output
Print-ready assets
Professional visuals

Example use cases

Print & publishingGalleriesRestoration tools

API Endpoints

One elegant surface.

Five focused endpoints. Predictable JSON. Pick one and play.

POST/v1/images/generate

request.json

Generate Image

Create images from text prompts.

{
  "prompt": "Aurora over a glass city",
  "model": "foneloft-xl-v3",
  "size": "1024x1024",
  "steps": 30,
  "n": 1
}

Use cases

AI image generationContent creationMarketing automationCreative applications

Developer Experience

Built for developers who ship.

Sensible defaults, sane errors, and the docs you actually want to read.

Easy Integration

Drop Foneloft into your stack with minimal effort. REST in, JSON out, sensible status codes — no surprises.

REST API Architecture
JSON Responses
Secure Authentication
Fast Processing
Scalable Infrastructure

Authentication

Secure access using API keys. Rotate without downtime, scope per environment, monitor everything in real time.

Headerrequired

Authorization: Bearer sk_live_FL_•••••

API Key Authentication
Access Management
Usage Monitoring
Security Controls

Generate your first key

Developer Resources

From your first request to your hundredth — guides, samples and tutorials wired together.

API Documentation
Quick Start Guides
SDK Examples
Integration Tutorials
Code Samples
Best Practices

Open the docs

Built for Scale

Reliable infrastructure, quietly invisible.

Foneloft API is designed to support applications ranging from startups to enterprise-scale deployments — without you ever thinking about it.

v1.4 · Enterprise grade

Operational · global

99.99%

Uptime

~ 4s

p50 latency

Edge regions

8M+

Calls / day

Platform advantages

High AvailabilityFast Response TimesScalable ProcessingSecure ArchitectureGlobal Accessibility

Latency · last 24hHealthy

p50 3.9s · p99 6.1sv1 · stable

Regions liveus-eastus-westeu-westap-southap-eastsa-east

Try the API

Industry Use Cases

Powering teams from startup to enterprise.

See where Foneloft API is already shipping in production.

Marketing

Marketing Platforms

Generate campaign visuals and advertisements automatically.

E-Commerce

E-Commerce Platforms

Create product imagery and promotional assets at scale.

SaaS

SaaS Applications

Add AI image generation as a feature within your product.

Content

Content Creation Tools

Enable users to generate graphics, thumbnails, and creative content.

Creative

Creative Agencies

Automate design workflows and client asset production.

Enterprise

Enterprise Solutions

Power internal creative operations and visual asset generation.

Security & Compliance

Secure by design.

Foneloft follows modern security practices to help protect your data, your API keys, and the visual assets you generate.

Blue and purple API security gateway illustration

Your data, locked down.

Every key, every request, every asset — encrypted, audited, and isolated by design. Trust, but verifiably.

SOC 2SSO ReadyTLS 1.3AES-256

Security console

Healthy

Encrypted ConnectionsTLS 1.3 in transit, AES-256 at rest.
Secure AuthenticationBearer tokens with rotation & scoping.
Access ControlsPer-environment keys & role limits.
Usage MonitoringPer-key audit logs & realtime dashboards.
Infrastructure SecurityHardened multi-region deployment.

Last auditPassed

0 incidents

Trailing 90 days

VaultKeys protected

API Pricing

Flexible usage-based access.

Choose an API plan that fits your development and business requirements.

Developer

For testing and small projects.

Sandbox keys
Generous free tier
Community support

Usage based

Popular

Growth

For startups and growing applications.

Higher rate limits
Priority queue
Email support

Usage based

Business

For production workloads and commercial deployments.

Team workspaces
SLAs
Premium support

Usage based

Enterprise

For large-scale implementations needing dedicated support and custom solutions.

Custom limits
Dedicated manager
SOC 2 & SSO

Usage based

View Full PricingNo credit card · cancel anytime

API FAQ

Questions devs ask.

Quick answers to the most common API questions before you start shipping.

Help centerOnline

Got questions?

we've got answers.

tap a question →

5 answers

Live help

Create a Foneloft account and generate an API key from your developer dashboard. Scope keys per environment and rotate them at any time — no downtime, no drama.

Need integration help?

Our developer success team is happy to pair with you.

Talk to us

Build in your stack, ship to users

Start Building with the Foneloft API.

Integrate AI-powered image generation into your applications and create innovative visual experiences for your users.

Get API Key View Documentation

REST · JSON
Free Developer plan
Production-ready

sdk.ts

import { Foneloft } from "@foneloft/sdk";

const fl = new Foneloft({ 
  apiKey: process.env.FONELOFT_KEY
});

const { image_url } = await fl.images.generate({ 
  prompt: "Aurora over a glass city"
});

Ships in minutes