# AISchemaGate

> Validate the structured JSON an LLM returns against a semantic contract
> before it reaches your application logic or database. One SDK wrapper
> (`LLMGate`) over OpenAI, Anthropic, vLLM and Ollama responses: extract the
> JSON, validate it, optionally re-prompt on violation, forward only the
> sanitized payload. Same engine, API keys and dashboard as DataContractGate.
> Non-streaming only in v1. Patent pending.

API base URL: https://app.datacontractgate.com
Source: https://github.com/nightmoose/contractgate

## Start here

- [LLM output validation playbook](https://aischemagate.dev/llm-output-validation.md): Install, author an output contract from 5–20 known-good outputs, validate, auto-repair, mask prompts, and provider quickstarts (OpenAI, Anthropic, vLLM/Ollama, LangChain, CrewAI, MCP).
- [LLMGate SDK reference](https://aischemagate.dev/llm-sdk-reference.md): Python and TypeScript API side by side. `contract_id` takes a contract name or UUID.

## Install

- Python: `pip install aischemagate`
- Node: `npm install @nightmoose/aischemagate`

## Related

- [DataContractGate agent index](https://app.datacontractgate.com/llms.txt): The same engine for data ingestion (Kafka, Kinesis, HTTP, Zapier).