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Tech riderRev. 21 Sept 2026

Open Client Registry (OpenCR)

Ch 066.9of 25 Identity Resolution Software
  1. 1Runs onAPI, Linux, Mac, self-hosted, Web, Windows
  2. 2CostsNot stated by the maker
  3. 3Matching approachhybrid
  4. 4Real-time APIYes
  5. 5Batch file importYes
4 lines stated Written from the maker's own pages: openclientregistry.org
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Overview

Open Client Registry (OpenCR) is ranked #6 of 25 in identity resolution software on Specifiction. It runs on API, Linux, macOS, Self-hosted, Web, Windows.

Compared on identity resolution software

Matching approach
hybridopenclientregistry.org
Real-time API
Yesopenclientregistry.org
Batch file import
Yesopenclientregistry.org

Facts

Purpose
OpenCR links patient identities across information systems to support care coordination, continuity of care, and reporting.openclientregistry.org · 4 Oct 2026
Matching
It supports configurable patient matching using probabilistic and deterministic methods and multiple algorithm variations.openclientregistry.org · 4 Oct 2026
Identifiers and messages
OpenCR can assign and look up unique identifiers and accept FHIR messages from point-of-service systems such as labs and EMRs.intrahealth.github.io · 4 Oct 2026
Manual review
Its UI lets users view records and break matches between records.intrahealth.github.io · 4 Oct 2026
Architecture
The documented stack includes the OpenCR Service, HAPI FHIR Server, and either OpenSearch or Elasticsearch; OpenHIM is optional.intrahealth.github.io · 4 Oct 2026
Integrations
The documentation describes FHIR R4, HAPI FHIR, OpenHIM, and OpenSearch or Elasticsearch as components or connections in an OpenCR deployment.intrahealth.github.io · 4 Oct 2026
Security
The security guidance recommends restricting the UI and services, using TLS, changing default passwords, and securing access with user and node authentication.intrahealth.github.io · 4 Oct 2026
Auditing
Transactions, including queries, are stored as audit events in HAPI FHIR and can be viewed in the OpenCR UI.intrahealth.github.io · 4 Oct 2026
Authentication limitation
The documentation says JWT and other user authentication solutions are not provided out of the box and can be added for a deployment.intrahealth.github.io · 4 Oct 2026
Data limitation
OpenCR is not a shared health record and does not contain patient clinical data.intrahealth.github.io · 4 Oct 2026
Deployment
The production installation guide expects Linux and says production deployment requires command-line familiarity and Linux administration expertise.intrahealth.github.io · 4 Oct 2026
Production storage
HAPI FHIR requires a database backend in production, with PostgreSQL or MySQL given as examples.intrahealth.github.io · 4 Oct 2026
Support
The About page directs inquiries to [email protected] and invites users to join the OpenCR Slack channel.openclientregistry.org · 4 Oct 2026
Maker
The About page says OpenCR was developed by IntraHealth International with USAID support through the MEASURE Evaluation project.openclientregistry.org · 4 Oct 2026

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Where it ranks on Specifiction

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