RelaySwitchUplink Switch
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Ultramarine 1 FlashPaper Instruments
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Related Products
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About
RelaySwitch is a hosted AI model API gateway for developers who want to call models from multiple providers through a shared endpoint and account. It exposes an OpenAI-compatible API and supports the Anthropic Messages format for Claude models, allowing compatible SDKs and developer tools to connect by changing the base URL and API key. Its catalog covers chat, image, video, speech and 3D models, with model identifiers and token rates. Usage is billed from a prepaid USD balance; input and output rates are listed separately, and cached input may cost less where supported. Customers can add funds through supported card and digital-asset payment methods, without a monthly subscription. RelaySwitch is intended for developers and teams building applications and agents with hosted AI models, and provides API documentation, model listings and setup guides for supported SDKs and tools.
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About
Ultramarine 1 Flash is a hosted large language model offered through an API for developers and organizations building AI-assisted professional workflows. It is designed for knowledge-work tasks across areas such as finance, law, consulting, and operations, including research, analysis, and preparation of document-based deliverables. Applications can send prompts and receive streamed or standard responses, use reasoning controls and custom tool calls, and request structured output. The API accepts image inputs and supports OpenAI-compatible chat-completion and Responses formats, as well as Anthropic Messages-compatible requests. Developers can connect through the OpenAI or Anthropic SDKs, Claude Agent SDK, or Claude Code, and can use the model with Paper Instruments' Word, PowerPoint, and Excel libraries. Usage is billed by tokens against a prepaid balance.
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Platforms Supported
Windows
Not Supported
Mac
Not Supported
Linux
Not Supported
Cloud
Supported
On-Premises
Not Supported
iPhone
Not Supported
iPad
Not Supported
Android
Not Supported
Chromebook
Not Supported
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Platforms Supported
Windows
Not Supported
Mac
Not Supported
Linux
Not Supported
Cloud
Supported
On-Premises
Not Supported
iPhone
Not Supported
iPad
Not Supported
Android
Not Supported
Chromebook
Not Supported
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Audience
Developers, startups and agencies that call LLM APIs and want one key, prepaid billing and crypto or card payment.
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Audience
Developers and organizations building AI-enabled knowledge-work tools in finance, law, consulting, and operations.
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Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Not Supported
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API
Offers API
Supported
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API
Offers API
Supported
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Screenshots and VideosNo images available
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Screenshots and Videos |
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Pricing
$10 prepaid
A $10 minimum prepaid top-up adds USD credit. Usage is deducted at model-specific input and output token rates; cached input may have a separate rate where supported. The service has no monthly subscription, and unused balance does not expire. Top-ups accept cards and supported cryptocurrencies, including USDT, USDC, BTC, ETH and SOL.
Free Version
Not Supported
Free Trial
Not Supported
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Pricing
$0.15/1M input tokens
Usage is prepaid and billed per token: input costs $0.15 per 1M tokens, cached input costs $0.03 per 1M tokens, and output, including reasoning, costs $0.50 per 1M tokens.
Free Version
Not Supported
Free Trial
Not Supported
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Reviews/
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Reviews/
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Pros & Cons from Real UsersPros
Cons
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Training
Documentation
Supported
Webinars
Not Supported
Live Online
Not Supported
In Person
Not Supported
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Training
Documentation
Supported
Webinars
Not Supported
Live Online
Not Supported
In Person
Not Supported
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Company InformationUplink Switch
Founded: 2026
United States
relayswitch.io
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Company InformationPaper Instruments
Founded: 2025
United States
www.paperinstruments.com/ultramarine
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Categories |
Categories |
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Integrations
Claude Code
Supported
OpenAI
Supported
Anthropic
Supported
Claude Agent SDK
Not Supported
Cursor
Supported
OpenAI Agents SDK
Not Supported
Vercel AI SDK
Supported
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Integrations
Claude Code
Supported
OpenAI
Supported
Anthropic
Not Supported
Claude Agent SDK
Supported
Cursor
Not Supported
OpenAI Agents SDK
Supported
Vercel AI SDK
Not Supported
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