---
title: FSMA204Hub developer API
description: Free, unauthenticated, read-only REST API for FSMA204Hub.
canonical: https://fsma204hub.com/developers
last-updated: 2026-09-12
---

# FSMA204Hub developer API

> Free, unauthenticated, read-only. No API key, no signup, no rate limit
> beyond ordinary fair use. Send a descriptive User-Agent.

## Endpoints

- `GET /api/v1` (`getApiIndex`): List the available endpoints
- `GET /api/v1/tlc/validate` (`validateTraceabilityLotCode`): Validate a FSMA 204 Traceability Lot Code
- `GET /api/v1/guidance` (`searchFsma204Guidance`): Search the FSMA 204 guidance library
- `GET /api/v1/pricing` (`getPricing`): Get current plans and prices

## Machine-readable description

- [OpenAPI 3.1](https://fsma204hub.com/openapi.json), also at /swagger.json, /api/openapi.json, /api/openapi.yaml
- [API index](https://fsma204hub.com/api/v1)
- [API catalog (RFC 9727)](https://fsma204hub.com/.well-known/api-catalog)

## Authentication

None. Every endpoint is public and read-only and serves only material
already published on this site. There is no API for account data yet; email
hello@fsma204hub.com with the use case if you need one.

## Errors

Every 4xx and 5xx response is `application/problem+json` per RFC 9457,
carrying a stable `code` and a `resolution` naming the next step. Branch on
`code`, never on the message text.

## Related

- [Agent integration guide](https://fsma204hub.com/agents.md)
- [Developer section index](https://fsma204hub.com/developers/llms.txt)