Structured Outputs Python Packages

llmcall

A lite abstraction layer for structured LLM calls

mlx-openai-server

A high-performance API server that provides OpenAI-compatible endpoints for MLX models. Developed using Python and powered by the FastAPI framework, it provides an efficient, scalable, and user-friendly solution for running MLX-based vision and language models locally with an OpenAI-compatible interface.

cuery

Prompt (cue) management and execution for tabular data.

qwed-open-responses

Verification guards for OpenAI Responses API - Verify AI agent outputs before execution

ai-prompt-runner

Deterministic stateless multi-provider AI prompt runner for CLI, scripts, and CI workflows with contract-driven structured outputs.

accrue

Composable enrichment pipeline engine for structured data enrichment using LLMs

structured-logprobs

OpenAI's Structured Outputs with Logprobs

justllm

Production LLM calls. Just the three lines. Cross-provider fallback, native caching, and reversible context compression on by default.

mcp-strict-check

Point mcp-schema-check at your MCP server and see which provider strict modes reject your tool schemas, and why. Backed by 617 servers / 14,804 real schemas.

structllm

Universal Python library for Structured Outputs with any LLM provider

schemafit

Provider-aware structured-output / JSON-Schema CI linter: fail CI before your schema 400s on OpenAI, Anthropic, or Gemini.

toolrails

Valid tool calls from any local model — a drop-in OpenAI-compatible proxy for Ollama that guarantees well-formed tool calls and restores tool_choice.

truenorth-framework

Declare the outcome, skip the logic. The developer-first infrastructure engine for structured, multi-turn AI conversations with built-in safety, async follow-ups, and native compliance

nfield

Extract structured fields from a document at any scale, from a handful to n number.

customer-discovery-agent

Reddit pain-point scraper + Claude clustering with structured outputs. Find what users actually complain about. pip · MCP · MIT.

schemaport

Check LLM requests against provider rules before sending. Offline CLI for JSON Schema subsets and prompt-cache safety.

structuinput

structuinput transforms natural language inputs into structured outputs like API templates, config files, and data schemas, streamlining development and integration.