# Parsefy > Financial Document Infrastructure for Developers: Turn financial PDFs into validated JSON. ## Docs - [Authentication](https://docs.parsefy.io/api-reference/authentication.md): How to authenticate with the Parsefy API - [Extract](https://docs.parsefy.io/api-reference/endpoint/extract.md): Extract structured data from financial documents - [Health Check](https://docs.parsefy.io/api-reference/endpoint/health.md): Check API availability and status - [Playground](https://docs.parsefy.io/api-reference/endpoint/playground.md): Test extraction without an API key - [Error Handling](https://docs.parsefy.io/api-reference/errors.md): Understanding and handling Parsefy API errors - [API Overview](https://docs.parsefy.io/api-reference/introduction.md): Complete reference for the Parsefy REST API - [Rate Limits](https://docs.parsefy.io/api-reference/rate-limits.md): Understanding Parsefy's rate limiting and credit system - [Introduction](https://docs.parsefy.io/introduction.md): Financial Document Infrastructure for Developers - [Confidence Scores](https://docs.parsefy.io/learn/confidence-scores.md): Understanding field-level confidence, evidence tracking, and the fallback mechanism - [Extracting Data](https://docs.parsefy.io/learn/extracting.md): Learn how to extract structured data from financial documents - [Extraction Rules](https://docs.parsefy.io/learn/extraction-rules.md): Use custom rules to guide and improve extraction accuracy - [Math Verification](https://docs.parsefy.io/learn/math-verification.md): Ensure extracted numeric data is mathematically consistent - [Schema Basics](https://docs.parsefy.io/learn/schema-basics.md): Learn how to create effective JSON Schemas for financial document extraction - [Express](https://docs.parsefy.io/quickstart/node/express.md): Build financial document extraction APIs with Express - [Fastify](https://docs.parsefy.io/quickstart/node/fastify.md): Build high-performance financial document extraction APIs with Fastify - [Hono](https://docs.parsefy.io/quickstart/node/hono.md): Build edge-ready financial document extraction APIs with Hono - [Node.js](https://docs.parsefy.io/quickstart/node/introduction.md): Extract financial document data with Node.js and TypeScript - [Next.js](https://docs.parsefy.io/quickstart/node/nextjs.md): Extract financial document data in Next.js applications - [FastAPI](https://docs.parsefy.io/quickstart/python/fastapi.md): Build financial document extraction APIs with FastAPI - [Flask](https://docs.parsefy.io/quickstart/python/flask.md): Build financial document extraction APIs with Flask - [Python](https://docs.parsefy.io/quickstart/python/introduction.md): Extract financial document data with Python - [External Resources](https://docs.parsefy.io/resources/external-resources.md): Official documentation for packages and frameworks used with Parsefy - [Playground](https://docs.parsefy.io/resources/playground.md): Try Parsefy without writing code: Financial Document Infrastructure for Developers - [SDKs](https://docs.parsefy.io/resources/sdks.md): Official Parsefy SDKs: Financial Document Infrastructure for Developers ## OpenAPI Specs - [openapi](https://docs.parsefy.io/api-reference/openapi.json) ## Optional - [Playground](https://try.parsefy.io) - [GitHub](https://github.com/parsefy)