Structured Output Python Packages

json-repair

Repair malformed JSON from LLMs, APIs, logs, and user input in Python.

vincio

The context engineering platform for AI applications — compile prompts, memory, retrieval, tools, schemas & policies into optimized, validated, observable context packets.

gda

Godot AI agent CLI, Skill, and MCP server with structured JSON/schema output — headless scene/script/export automation plus live runtime control.

prompture

Prompture is an API-first library for requesting structured JSON output from LLMs (or any structure), validating it against a schema, and running comparative tests between models.

logsentinelai

LLM-powered security log analyzer: detect threats & anomalies with zero regex — just declare a Pydantic schema. Real-time Telegram alerts, SIEM-ready with Elasticsearch/Kibana. Supports OpenAI, Ollama, vLLM.

mlx-omni-server

MLX Omni Server is a local inference server powered by Apple's MLX framework, specifically designed for Apple Silicon (M-series) chips. It implements OpenAI-compatible API endpoints, enabling seamless integration with existing OpenAI SDK clients while leveraging the power of local ML inference.

gemini-coax

Make Google Gemini structured output actually validate against your Pydantic models — fixes the anyOf/enum drop, ignored numeric & length bounds, and degraded array tails.

pollux-ai

Multimodal orchestration for LLM APIs. Source patterns, context caching, and structured output for text, PDFs, images, video, and YouTube - so you don't manage the complexity yourself.

synapsekit

Async-native Python framework for building LLM applications — RAG pipelines, tool-using agents, and graph workflows. Streaming-first, transparent API, 2 hard deps.

sentinel-blocks

Robust extraction of structured payloads from LLM output via sentinel blocks (<<<TAG>>> … <<<END>>>).

afterimage

Generate conversational, tool-calling, structured-output, and preference datasets — easily and at scale

llm-saia

Structured verbs for LLM interactions (verify, critique, decompose, extract, synthesize...)

dynaprompt

Dynamic prompt management and configuration library for LLM applications. Powerful, lazy-loading, and supports Jinja2 templates and Pydantic schemas.

sgr-agent-core

Schema-Guided Reasoning (SGR) has agentic system design created by neuraldeep community

gpt-function-decorator

Python decorator to define GPT-powered functions on top of OpenAI's structured output

llm-async

Async multi‑provider LLM client for Python

llmcast

Type-safe LLM output parsing with Pydantic models and Jinja2 prompt templates

baissarienterprises-llm-wiki

A production-grade knowledge base operating system — AI agents compile raw sources into persistent, cross-linked Markdown wikis with concurrency control, multi-provider LLM integration, FTS5 search, and community detection. One repo. Any agent. Any machine.

sophia-motor

Smart functions with a brain inside. Inputs in. Pydantic out. Multi-turn agent in the middle.

gemini-gateway

Typed Python gateway for Google Gemini API access with multi-key rotation, rate limiting, retries, structured JSON output, and lightweight usage metadata.

saidex

SAIDEX — Structured AI Data EXtraction: validated Pydantic models from LLM responses with automatic retry, fallback, and an agentic tool loop

ask2api

A minimal CLI tool that turns natural language into instant APIs.

alloy-ai

Alloy (Python): Python for logic. English for intelligence.

ehrextract

Structured feature extraction from clinical notes with LLMs — local HuggingFace (LoRA adapters), OpenAI-compatible, and Anthropic providers