About This Site
One key, every modality—run text, images, video, and code through GPT, Claude, Gemini, Sora, Veo, and Banana from a single endpoint. Two channels, your call: route everyday traffic through the value tier to keep costs down, and flip critical workloads to the official tier when stability matters. OnAPI is a one-stop AI model API gateway that gives developers a single key to handle text, image, video, and code across every major frontier model—GPT, Claude, Gemini, Sora, Veo, Banana, and more. Turn models into products. Ship ideas. Two channels, you're in charge: send everyday traffic to the high-performance value tier and stretch every dollar; flip mission-critical calls to the official tier, backed by real paid keys hitting the providers directly. No reselling tricks, no smoke and mirrors, no substituting cheap models for premium ones—just a reliable safety net when it counts. Fully OpenAI-compatible. Change one line—your base_url—and you're done. Works out of the box with the OpenAI SDK, LangChain, Claude Code, Cursor, Cline, and Cherry Studio. No international credit card required, no juggling bills across half a dozen vendors. Pay with Alipay, WeChat Pay, or crypto, billed by usage, with credits that never expire.
Alternatives
ApyHub AI APIs
ApyHub is an AI-enabled API platform with flexible pricing for developers and teams.
ApyHub is an AI-enabled API platform that provides tools for summarizing text and documents, along with image, video, and text APIs. It offers flexible pricing for developers and teams, allowing them to power up applications with AI for intelligent decision-making, predictive analytics, and natural language understanding.
ApiModels
APIMODELS is a unified AI model API that puts 100+ image, video, music, speech and LLM models behind one endpoint, one API key and one balance. Instead of opening an account with OpenAI, Google, Anthropic, ByteDance, Suno, ElevenLabs, MiniMax, xAI, DeepSeek, Alibaba and Zhipu separately — each with its own SDK, billing and approval process — you sign up once and switch models by changing a single string. Flagship image models, priced per image with no token math: • Nano Banana Pro (gemini-3-pro-image-preview) — $0.06 at 1K and 2K, $0.12 at 4K. Google lists the same model at $0.134 and $0.24, so that is 55% and 50% below list. Our $0.06 is also lower than Google's own Batch API price of $0.067 — and Batch makes you queue, while we return in real time. • Nano Banana 2 (gemini-3.1-flash-image-preview) — $0.05 at 1K and 2K, $0.08 at 4K, against Google's $0.067 / $0.101 / $0.151. That is 25% off at 1K, 50% off at 2K and 47% off at 4K. • GPT Image 2 (gpt-image-2) — a flat $0.025 per 1K image, $0.04 at 2K, $0.06 at 4K, with up to 16 reference images for multi-image editing. OpenAI bills this model by token; we bill a fixed price per image, and no OpenAI organization verification is required. The API is OpenAI-compatible, so existing SDKs, Cursor, Codex and LangChain code work by pointing base_url at apimodels.app. Billing is strictly pay-as-you-go with per-call prices published on every model page, starting at $0.001; there is no subscription, no monthly minimum and no expiring credits, and failed generations are never charged. New accounts get $0.10 of free credit with no card required.
One API key for 100+ AI models — image, video, music, speech and LLM. Nano Banana Pro at $0.06/image, 55% below Google's list price. Pay-as-you-go, no subscription.
EMix.ai: Lower-Cost AI APIs for Multimodal Development
Unified lower-cost AI API platform
Emix.ai is a developer-focused AI API platform that provides unified access to leading image, video, audio, chat, and enhancement models. It lets teams build with models like GPT, Gemini, Kling, Seedance, Claude, and Grok through one lower-cost API, with transparent usage-based pricing, free API credits, and no charges for failed generations.
Modelflare
Modelflare is a stable, lower-cost API gateway for GPT, Claude, Grok, GLM, Seedance, MiniMax, and other models, with routes as low as 1.5% of the official price. The same account opens Castaly, a studio for generating images and video, comparing models and prices, and remixing community work.
Modelflare is one API gateway for apps, agents, and coding tools. Keep the client you already use, point it at https://modelflare.dev/v1, and call many model families with the same key.
Lower price. Selected routes bill down to 1.5% of the official list price. A single top-up of US$20 unlocks GPT at that 0.015x rate.
Everyday traffic can stay on a lower-cost group; more sensitive jobs can use a balanced or higher-stability group. The pricing page shows what you pay against the official list price. Balance is in US dollars: one dollar of top-up is one dollar of credit. Castaly uses that same balance.
A key can list fallback groups in order. If the primary group is unavailable, the request moves to the next group. Each request records status, latency, token usage, and cost, whether it came from your own code or from Castaly.
Many models, one account. GPT uses OpenAI Chat Completions and the Responses API, including Codex-style clients. Claude uses Anthropic Messages, including Claude Code. Grok, GLM, Seedance, and MiniMax are on the same key, along with DeepSeek, Kimi, Owen, Gemini, and image and video models.
Castaly (https://castaly.modelflare.dev) is the studio on that account.
In the browser you generate images and video with Seedance, Kling, Wan, MiniMax, Seedream, and other models from the same catalog. You compare specifications and price, set the shot parameters, and remix a community work from its prompt and settings. Account, balance, API keys, and usage history are shared with Modelflare, so a result made in Castaly can also be requested through the API.
Create a key at https://modelflare.dev, set the base URL to https://modelflare.dev/v1, or start a shot in Castaly.
Key Features AI
Core Features
Every modality covered — Text, image, video, and code in one place. Full support for GPT, Claude, Gemini, Sora, Veo, and Banana.
OpenAI-compatible — Swap one line of base_url and you're migrated. Drop-in for your existing code and SDKs.
Two channels, always a backup — Value tier for cost efficiency, official tier for rock-solid stability. Flip between them on demand.
The real deal on the official tier — Real paid keys, US cards billed directly by the provider. No reselling tricks, no smoke and mirrors, no swapping in cheaper models. Won't blow up when it matters.
Transparent token-based pricing — Counted against official token rates 1:1. No hidden multipliers. Save up to 80% vs. official pricing.
Easy payments — Alipay, WeChat Pay, and crypto top-ups. Pay-as-you-go, credits never expire.
Developer-friendly docs — Comprehensive integration guides covering OpenClaw, Hermes, and other third-party apps. Code samples and an interactive playground included.
Advantages
No expiration on account balance, allowing users to spend as they go
Genuine paid official keys without using risky chat2api reverse-engineering methods
Transparent top-up rate of 1 RMB to 1 USD balance
Wide support for advanced capabilities including vision, reasoning, tools, and files
Diverse model catalog featuring advanced agentic models like GPT-5.5 Pro and GPT-5.3 Codex
缺点：Requires account registration and login to manage keys and balances
缺点：JavaScript must be enabled to run and navigate the web application interface
OnAPI Reviews (0)
5.0
0 reviews
Log in to rate this website and write a review
Log in
- No reviews yet. Be the first to write one!
30-Day Click Trend
10-16
10-30
11-14
Related Sites
AI API Gateway - Multi-Model API Access
TokenByte is an AI API Gateway that provides unified access to leading large language models (LLMs) through one OpenAI-compatible API.
Social media scheduling, analytics, collaboration, and AI management platform
PublishBuddy is a social media management platform with an integrated AI Agent for planning, creating, scheduling, publishing, and analyzing content across Facebook, Instagram, X, LinkedIn, Pinterest, YouTube, TikTok, Telegram, Threads, and Bluesky. It provides a unified content calendar, post previews, bulk scheduling, analytics, collaboration workflows, AI content assistance, a REST API, and MCP access for tools such as Claude and Cursor.
Financial platform for managing AI company spending and agent payments
Nebula is an AI-focused financial platform for businesses that need to manage spending on inference, cloud computing, and AI agents. It combines business banking services, agent payment cards, spend attribution, treasury tools, and international payouts. Nebula automatically categorizes eligible vendor spending by agent, model, environment, or customer, and lets businesses apply spending limits and merchant controls. Banking and card services are provided by regulated partner institutions; Nebula itself is a financial technology company, not a bank.
Unified API gateway for discovering and routing AI models
GuRouter is an AI API gateway and LLM asset management platform that provides unified access to a range of AI models, including DeepSeek, OpenAI, Claude, Gemini, Qwen, and others. It offers OpenAI-compatible APIs, model discovery and pricing comparisons, and routing for coding agents. The site lists token-based and per-request model prices, including some models available at $0 per request.
One API for AI models, with transparent pay-as-you-go billing.
TokLab is a unified API platform for AI image, video, language, and audio models. Developers can access models from multiple providers through one API key and base URL, using OpenAI, Anthropic, or Gemini request formats, as well as TokLab's task API for media. TokLab displays model prices before requests are made and charges only for successful requests. It uses a prepaid USD balance with no subscription, and balances do not expire.
Mac AI desktop app for models, connected tools, and automated work
LYKN is an AI desktop application for Mac that brings more than 260 AI models and over 1,500 tool integrations into one workspace. It can use context from a user's Mac desktop and files to support chat, software building, image generation, research, voice conversations, and automated agents. Windows support is listed as coming soon, and a unified API for developers is also in development.
