Built for Real-World HL7
Parse, build, and serialize HL7 v2 messages exactly as they appear in production environments: pipes, escapes, and all.
Cosyte Developer Documentation
Open-source HL7, MLLP, and FHIR packages, built for JavaScript and TypeScript developers
Browse Packages@cosyte/hl7
HL7 v2 parser, serializer, and builder for JavaScript and TypeScript.
Read Docs@cosyte/mllp
Minimal Lower Layer Protocol (MLLP) client and server for HL7 message transport.
Read Docs@cosyte/fhir
FHIR R4 resource model, JSON and XML codec, and layered validation for JavaScript and TypeScript.
Read Docs@cosyte/dicom
DICOM Part 10 parser and metadata toolkit for medical imaging.
Read Docs@cosyte/x12
ASC X12 EDI parser for HIPAA 005010 healthcare transactions.
Read Docs@cosyte/ccda
C-CDA (HL7 CDA R2) clinical document parser.
Read Docs@cosyte/ncpdp
NCPDP SCRIPT + Telecom parser for pharmacy and e-prescribing.
Read Docs@cosyte/astm
ASTM E1394 / E1381 parser for clinical laboratory analyzer (LIS) interfaces.
Read DocsPathways
Git-native healthcare integration engine: build, version, and run interface channels.
Read Docs@cosyte/transform
HL7 v2 to FHIR transformation layer built on the cosyte parser models.
Read Docs@cosyte/terminology
Healthcare terminology engine: validate and map codes across code systems.
Read Docs@cosyte/cli
Command-line and MCP front door to the cosyte healthcare parsers.
Read Docs@cosyte/deid
De-identification toolkit for healthcare data (HIPAA Safe Harbor).
Read Docs@cosyte/synth
Deterministic synthetic healthcare fixture generator for testing and conformance.
Read Docs@cosyte/dates
Precision-preserving date and time utilities for the cosyte parsers that never guess a timezone.
Read DocsWhy Cosyte?
Developer-First APIs
TypeScript-native, fully typed, zero runtime surprises. Works in Node.js, Bun, and edge runtimes.
MIT Licensed, Open Source
No hidden licensing costs. Fork it, extend it, ship it. Contributions welcome.