Model Kit.
2 · UnderstandEvery model you need, behind one interface. Build on the best model for each job and switch when something better or cheaper arrives. Your product keeps running while the model landscape keeps moving.
242 APIs in this kitAPIs in the Model Kit
242 servicesRetrieve and Filter Live Proxy Lists API
Get a live list of public proxies with filters for country, protocol, anonymity, latency, uptime, ASN, and subnet.
Check Domain Availability Across TLDs API
Check domain name availability across multiple TLDs with our Domain Availability Checker API. Retrieve RDAP status, registrar details, expiration dates, and availability signals.
Generate Certificate Document from JSON API
Render certificates from JSON data as PDF, HTML, or DOCX. Includes page options, download control, and render metadata for issued documents.
Callable LabsGenerate Invoice Document from JSON API
Render invoices from JSON into PDF, HTML, or DOCX. Returns document metadata, page count, and a data URI for billing and workflow systems.
Callable LabsGenerate Letter Document from JSON API
Render structured letter data into PDF, HTML, or DOCX. Return a PDF data URI and render metadata for business letters, notices, and mail-merge workflows.
Callable LabsGenerate Receipt Document from JSON API
Render receipts from structured JSON as PDF, HTML, or DOCX. Returns file metadata, byte size, page count, and a data URI for JSON output.
Callable LabsGenerate Report Document from JSON API
Render structured JSON into PDF, HTML, or DOCX reports. Returns file bytes or a data URI plus render metadata, cache status, and page count.
Callable LabsValidate & Generate Documents from Templates
Validate DOCX templates and render DOCX, HTML, or PDF from JSON data. Get variable checks, syntax errors, and generated document output.
Callable LabsBasic Sentiment Analysis API
Detect positive, negative or neutral sentiment in text, with an overall score plus per-sentence results and confidence. Simple REST API, JSON output.
SkycraftVerifiedLanguage Detection & Text Tagging API
Detect the language of any text with confidence scores, stem words to their root form, and tag parts of speech. Simple REST API with JSON responses.
SkycraftVerifiedText Analysis & Scoring API
Score text readability with Flesch, Fog, SMOG and more, plus style, skimmability and interestingness scores, word and sentence counts. JSON REST API.
SkycraftVerifiedText Correction & Word Tools API
Correct spelling in text, list synonyms for a word, and singularize or pluralize nouns with one REST call. Clean JSON output, no word lists to maintain.
SkycraftVerifiedWhich Model API do you need?
The question you arrived with, and the API that answers it.
What is the Model Kit?
The Model Kit is the model layer of your product: chat, reasoning, summarization and classification through one consistent interface across providers.
You choose the right model per task, compare cost and quality, and move fast when the market shifts, without rebuilding integrations each time.
How AI products use it
- Send chat to one provider and summaries to another, through the same interface.
- Switch providers when price or quality changes, without rewriting code.
- Add new models as they launch while your integration stays the same.
Why not build it in-house?
Each capability in the Model Kit looks simple to build. The hard part is keeping it accurate, available and up to date once your product depends on it.
- Provider integrationsEach LLM provider has its own SDK, auth, error codes and rate limits. Every one you add is another integration to keep current.
- Model churnNew models launch and old ones are retired every few months. Each switch means re-testing prompts, outputs and costs across your product.
- Outages and rate limitsWhen a provider slows down or goes down, your product does too, unless you have built retries, fallbacks and quota handling yourself.
- Cost trackingToken prices differ per model and change often. Knowing what each feature costs you needs metering you have to build and maintain.
Do you run an API that belongs in the Model Kit?
Publish it on ApyHub and put it in front of the teams and AI agents building with the Model Kit. Your API joins the catalog under one subscription, becomes callable through MCP, and earns from every call.
Questions about the Model Kit
What is the ApyHub Model Kit?
The Model Kit is the model layer of your product: chat, reasoning, summarization and classification through one consistent interface across providers.
What is an LLM API?
An LLM API lets your software send prompts or chat messages to a large language model and receive generated text back. It is how AI products add chat, summaries, classification and agent reasoning.
Is the Model Kit OpenAI-compatible?
Yes. Chat Completion Generation follows the OpenAI chat format, so code written for OpenAI-style chat completions works with minimal changes.
Can I choose the model provider per request?
Yes. You choose the provider on each request, so you can route different tasks to different providers and switch when price or quality changes.
When should I use the advanced chat completion API?
Use Advanced Chat Completion Generation when you need tools, streaming, web search or structured output. Use Simple Chat Prompt for a single prompt and response.
Can I test Model Kit APIs before integrating them?
Yes. Every API has a Try it panel on its service page. Your key is filled in, you send a real request and see the actual response in your browser before you write any code.
Can AI agents use the Model Kit?
Yes. Every endpoint is MCP-ready. Connect ApyHub MCP to Claude, ChatGPT, Cursor, Mistral Le Chat or any MCP-compatible agent, and your agent can discover and call these APIs directly.
How is it priced?
Every kit sits under one subscription, paid in atoms, ApyHub's usage unit. Every call shows its cost, and the free Starter plan needs no card.