Best 181 API Design Tools in 2026

Automatic background removal
API and integrations
AI Photo editor
Bulk editing

Pay-as-you-go $3 3 credits
Lite $8.10 Use up to 40 credits per month ($97.20 billed yearly)
Pro $35.10 Use up to 200 credits per month ($421.20 billed yearly)
Volume+ $80.10 500 credits per month ($961.20 billed yearly)

Simply upload an image to the remove.bg website, and the AI will automatically remove the background. You can then download the image with a transparent background or edit it further using available tools.

Lifelike 3D capture
Photorealistic rendering
iOS App for 3D capture
Web API for 3D asset generation

Use the Luma AI iOS app or web API to capture scenes and objects in 3D. The captured data can then be used in various applications, including AR, VR, game development, and VFX.

Visual Prompt Management
RAG (Retrieval-Augmented Generation) Pipeline
Enterprise LLMOps
BaaS (Backend as a Service) Solution
LLM Agents
AI Workflow Orchestration
Multi-LLM Support

Sandbox Free Free Trial of Core Capabilities, 200 messages, Support OpenAI/Anthropic/Llama2/Azure OpenAI/Hugging Face/Replicate, 1 Team Workspace, 1 Team Member, 5 Apps, 50 Knowledge Documents, 50MB Knowledge Data Storage, 10/min Knowledge Request Rate Limit, 5,000/day API Rate Limit, Standard Document Processing, 10 Annotation Quota Limits, 30 Days Log History
Professional $59 per workspace/month 5,000 messages/month, Support OpenAI/Anthropic/Llama2/Azure OpenAI/Hugging Face/Replicate, 1 Team Workspace, 3 Team Members, 50 Apps, 500 Knowledge Documents, 5GB Knowledge Data Storage, 100/min Knowledge Request Rate Limit, Unlimited Dify API Rate Limit, Priority Document Processing, 2,000 Annotation Quota Limits, Unlimited Log History
Team $159 per workspace/month 10,000 messages/month, Support OpenAI/Anthropic/Llama2/Azure OpenAI/Hugging Face/Replicate, 1 Team Workspace, 50 Team Members, 200 Apps, 1,000 Knowledge Documents, 20GB Knowledge Data Storage, 1,000/min Knowledge Request Rate Limit, Unlimited Dify API Rate Limit, Top Priority Document Processing, 5,000 Annotation Quota Limits, Unlimited Log History

Use Dify.AI to visually design AI apps in an all-in-one workspace, fortify apps with reliable data pipelines using the RAG pipeline, empower prompt design and testing with the Prompt IDE, monitor and refine model reasoning with Enterprise LLMOps, integrate AI into products with the BaaS solution, create custom LLM Agents, and orchestrate AI workflows.

Extendable launcher
Clipboard History
Quicklinks
Calculator
Snippets
Emoji Picker
Window Management
AI integration
Notes

Free $0/month Core features, Raycast AI (50 Free Messages), Raycast Notes (5 Free Notes), Raycast for iOS, Thousands of extensions, Custom Extensions, Developer Tooling
Pro $8/month Everything in Free, Raycast AI, Cloud Sync, Translator, Unlimited Raycast Notes, Unlimited Clipboard History, Custom Window Management, Custom Themes
Pro + Advanced AI $16/month Everything in Pro, Advanced AI Models
Teams Pro $12/user/month AI for your whole team, Unlimited Shared Commands, Unlimited Shared Snippets, Unlimited Shared Quicklinks, Private Store
Teams + Advanced AI $20/user/month The best for your whole team

Type to filter entries and use commands. Raycast allows you to search for apps and commands, search emoji and symbols, manage clipboard history, search files, define words, search Google or DuckDuckGo, manage windows, and much more.

Realtime database
Full-stack TypeScript environment
Authentication
Open source self-hosting
AI coding assistance
Backend built-ins (cron jobs, AI workflows, auth)

Starter Free For hobbyists and prototypes.
Professional $25 per developer/month For teams with growing projects. Scales as you go.

Developers can use Convex to define database schemas, queries, and mutations in TypeScript. The platform automatically keeps the app in sync with frontend and backend code, eliminating the need for state managers or websockets.

Speech-to-Text
Streaming Speech-to-Text
Speech Understanding
Speaker Diarization
Sentiment Analysis
PII Redaction
Content Moderation
Automatic Language Detection

Free Free Start building with $50 of free credits
Pay as you go Starting at $0.12/hr for Speech-to-Text For teams ready to integrate Speech AI into their products
Custom Contact us The most flexible plan for scaling AI in production

Users can leverage AssemblyAI's API to transcribe pre-recorded voice data, build voice agent workflows with low latency streaming speech-to-text, and enable deep analysis with audio-intelligence models. The platform also offers a no-code playground for testing AI models.

Vector search
Semantic search
Hybrid search (sparse and dense embeddings)
Real-time indexing
Metadata filtering
Serverless scaling
Managed infrastructure

Starter Free For trying out and for small applications. Includes limited usage of Serverless, Inference, and Assistant. Community Support.
Standard from $25 / month For production applications at any scale. Includes $15/mo usage credits. Pay-as-you-go for Serverless, Inference, and Assistant Usage. Includes Free support.
Enterprise from $500 / month For mission-critical production applications. Includes $150/mo usage credits. Everything in Standard, plus 99.95% Uptime SLA, SAML SSO, Private Networking, Customer Managed Encryption Keys, Audit Logs, Service Accounts, Admin APIs, HIPAA Compliance, and Pro support included.
Dedicated Contact Us For organizations requiring the highest level of security and control. Everything in Enterprise, plus Bring-your-own-cloud (BYOC) and Premium support included.

To use Pinecone, you first need to create vector embeddings. Then, you can manage and search through these embeddings using Pinecone's API to power applications like semantic search and recommenders. The platform offers a quick setup and serverless scaling, allowing you to launch vector databases in seconds and adjust resources automatically.

Text-to-image generation with Stable Diffusion
Image, video, audio, and 3D model generation
Self-hosted licensing for model deployment
API integration for custom applications
Cloud platform integrations
Stable Assistant web-based creative platform

Community Free For researchers, developers, small businesses, and creators with less than $1M in annual revenue.
Enterprise Custom Pricing For enterprise, API providers, and businesses with annual revenue exceeding $1M. Available upgrades include: Custom Model Training, Consulting Services

To use Stability AI's models, you can choose from several deployment options: self-hosting with a license for customization, integrating via their API into custom applications, or using their models through cloud partner ecosystems. For a web-based creative platform, you can use Stable Assistant. You can also explore their models and applications through the navigation menus on their website.

Custom AI model training
Image generation
Texture generation
Skybox generation
Vectorization
ControlNet
Image editing (Enhance, Expand, Retouch, Restyle, Pixelate, Remove Background)
API integration

Pro $45/month (Monthly) or $36/month (Annually) 5,000 Creative Units, Ticketed Support, 5 Concurrent Generations, Standard Processing, 50GB Storage Allowance, High-Resolution Download, 16x Factor Upscaling, Uncapped Low Priority Generations
Team $150/month/seat (Monthly) or $120/month/seat (Annually) 15,000 Creative Units per seat, Priority Support, 15 Concurrent Generations, High Priority Processing, 100GB Storage Allowance, 3 Concurrent Trainings
Enterprise Custom Customisable limits, Premium Support, Comprehensive Onboarding and Training, Early Access to New Features, Advanced Security & Compliance (SOC2/SSO/SAML)

To use Scenario, gather training data (characters, props, backgrounds), upload it securely, and train custom AI models. Use advanced features like Composition Control and Pixel-Perfect Inpainting to adjust outputs. Integrate the Scenario GenAI Engine via API into workflows, design software, or game engines.

Model APIs
GPU Instances
Serverless GPUs
Custom Model Deployment

Deploy AI models effortlessly with Novita AI's simple API. Build and scale on their affordable and reliable GPU cloud. Access 200+ AI models with a simple API, deploy custom models with guaranteed performance SLAs, and use serverless GPUs that automatically scale to workload demands.