Maine Program Information

The Office of Marijuana Policy (OMP) welcomes you to the Maine Marijuana Enforcement Tracking Reporting & Compliance (Metrc) webpage. 

The Metrc system is an integral part of OMP’s mission to ensure the health and safety of all Mainers by effectively and responsibly licensing and regulating marijuana establishments. OMP’s vision is to provide interested consumers with access to a regulated industry, while diminishing an unregulated, untested black market. Maine’s marijuana inventory tracking system, hosted by Metrc LLC, will help to make that vision a reality.

This portal contains important resources, training, and updates for marijuana establishments. The information and tools provided by Metrc LLC are critical in ensuring that licensees remain in compliance with the marijuana-related laws and regulations within the State of Maine.

We look forward to working with you to ensure a safe, equitable, and effectively run marijuana industry in Maine. 

maine logo.png


In an effort to stay ahead of common industry-related questions that we have seen in past deployments, we have assembled a list of frequently asked questions (FAQs) and draft responses. These FAQs will help mitigate industry concerns as the system is deployed. 

Once the client agency responds to the questions outlined within this document, the Metrc team will post them on the state-specific page located on

Industry FAQs


Q: How much will it cost for the system?

A: There is no software to purchase or install. Metrc is a web-based application which will serve as the Marijuana Inventory Tracking System for the State of Maine. Metrc LLC charges $40 per month, per license for access to its online system. This fee includes ongoing, complimentary industry training and support. Required plant tags are $0.45 each and required package tags are $0.25 each.  


Q: How does the system work?

A: Metrc is a cloud-hosted, real-time system that uses serialized tags with barcode, human-readable, and Radio Frequency Identification (RFID) tags attached to every plant and wholesale package. Together, the online platform and tags track cannabis products throughout their lifecycle, including cultivation, harvesting, manufacture, and sale.


Q: What if I have technical issues after the system has deployed?

A: Metrc LLC has a dedicated team of support staff who will be available to resolve any technical support issues. The support desk can be contacted via phone (1-877-566-6506) or email (


Q: Will other licensees be able to see my inventory information?

A: No. Licensees will only be able to access their own inventory information through Metrc. They will not be able see the inventory information for any other licensee via Metrc.


Q: Do I have to use Metrc? What if I want to use my own inventory control system?

A: In accordance with the Marijuana Legalization Act, you must use Metrc to track adult use marijuana and marijuana products from immature marijuana plant to the point of retail sale in the State of Maine. 


Licensees may choose to purchase optional third-party software packages at their own expense.  Many of these third-party software products will have the ability to input data into Metrc, although you may still need to use the Metrc web-interface for certain functions, such as product transfers.  Metrc LLC will provide an Application Programming Interface (API) for vendors who wish to develop software products that will integrate with their system. Data uploads via comma-separated values (CSV) files are also supported. Each licensee is responsible for the timeliness and accuracy of all data entered or transmitted to Metrc.


Q: What POS systems will be available with Metrc?

A: Metrc LLC will provide a list of validated, third-party integrators who have the ability to integrate with the Maine-specific implementation of Metrc.  A link to this list of validated software providers will be posted on this page.


Q: Do I need to purchase any additional hardware such as computers, barcode readers, or RFID readers?

A: Metrc is a completely web-hosted system. That means that all access to Metrc is done via the internet and only requires an internet connection; a HTML 5-compatible web browser; and a desktop computer, laptop, or tablet. No additional hardware is required, and there is no software to download, install, or maintain. 


Barcode and/or RFID readers are optional accessories that a licensee may choose to use. A decision to buy such additional equipment is made at the sole discretion of the individual licensee.


Q: How do I get training in Metrc?

A: During the conditional license phase of the application process, the Maine Office of Marijuana Policy (OMP) will notify licensees and Metrc LLC when training may begin. Metrc LLC will provide a training schedule on this page. Licensee track-and-trace administrators must complete Metrc training and successfully complete a proficiency exam before an active license will be issued to a marijuana establishment in Maine. 


Online training will also be made available on an ongoing basis for all active licensees and their employees. While official Metrc training is strongly encouraged, Track-and-Trace administrators will also be permitted to train the employees of their respective facility.  



Office Of Marijuana Policy (OMP)

Adult Use Rules and Statutes

Adult Use Applications and Forms

OMP “Stay Connected” page

Integration & API

1. Download, sign and return Link to API Agreement to


2. Request API developers documents and complete the information requested and email to

  • Company Name

  • Company Address

  • Company Website

  • Company Phone Number

  • Primary Contact Name

  • Primary Contact Email

  • Primary Contact Phone Number

  • Secondary Contact Name

  • Secondary Contact Email

  • Secondary Contact Phone Number

  • Name of Software


3. Attend a Metrc training class and complete the test. 


4. Once Metrc receives approval for the API User Agreement, a test vendor API key for the sandbox will be generated.


5. Complete Capability Assessment in the sandbox. A document of the functionality assessment criteria will be provided to you when you submit your request. Requests should be submitted after completion of the Metrc training, not prior.


After these steps are complete and the evaluation is validated, Metrc LLC will issue a production vendor API key. When Metrc sends your production vendor API key, we will also ask for your company and contact information to add it to the Validated Integrator List.


Recent Bulletins

ME_IB_0013_5.27.21_Production Batch Best Practices Final


ME_IB_0009_Unaffiliated Wholesale Transfers Final

Kief (Flower) Item Category.pdf




Ingredients_Trade Sample

ME_5.14.21_IB_0011_New Metals Test Batches


ME_IB_0007_Harvest Batch Production Batch Package Size_OMP Audit Samples V3


ME_IB_0010_3.11.21_NotSubmitted Transfers for Cultivation licenses


ME_IB_0006_TestFailed Package Transfer to Product Manufacturers V2



10 am to 10 pm Eastern Time, Monday through Friday (for Metrc software support)

24 hours/day (to report system downtime or performance issues)