Direct Tooling

The ASTP Direct Tool, built on the foundation of the Direct Standard®, provides a comprehensive testing platform for developers and implementers to validate their Direct implementations. With a suite of testing capabilities and essential certificates, the ASTP Direct Tool empowers organizations to ensure compliance with applicable standards and specifications, facilitating secure, interoperable exchange of sensitive healthcare information over the open internet. Verify your system's basic Direct send capabilities by sending a message to testing@ett.healthit.gov

Test By Criteria

All-Inclusive Criterion Testing


Select a category to start your direct tooling.

Jumpstart Your Direct Tooling Journey: Select a Testing Category

Register for Direct Email

Register and link one or more Direct accounts to your regular contact email address for comprehensive reporting.

Send Direct Email

Send a Direct message to a HISP of your choosing.

XDM Validator

Upload your XDM file to validate.

Discovery Test Tool

Test your systems compliance with the Direct Project's Certificate Discovery and Provider Directory Implementation Guide. Validate your implementation's ability to correctly discover, host, and validate certificates, ensuring secure and interoperable exchange of health information.

Transport Test Tool

Test your Direct implementation's ability to send and receive messages securely by exchanging Trust Anchors with SITE or using the Direct Trust production bundle, ensuring reliable and compliant communication within the Direct ecosystem.

XDR Edge Test Tool

This Tool provides a mechanism for developers to test the sending and receiving capabilities of their Direct XDR Edge Implementations. The implementers can interact with a Direct Reference Implementation to check their implementations for interoperability and functionality.

HISP Testing Portal

Simulate Health Information Service Provider (HISP) functionality and validate your system's compatibility with SMTP, IMAP, and POP3 protocols through comprehensive test cases and message tracking, ensuring seamless integration with Direct messaging providers.


Certification for Download

Empower Your Testing with Essential Certificates

Public Cert

ETT Public Cert

The ETT Public Cert is used for signing Direct messages, allowing you to test your system's ability to validate and trust the ETT as a message sender.

Trust Anchor

Trust Anchor

The Trust Anchor establishes a trusted relationship between your HISP and the ETT by linking the certificate authority's (CA) certificate to the ETT's HISP certificates

Invalid Trust Achor

Invalid Trust Anchor

The Invalid Trust Anchor simulates an incorrect association between the CA's certificate and the ETT, enabling you to test your system's handling of invalid trust relationships in negative testing scenarios.

Root CA

Public Root CA

The ETT Public Root CA is a self-signed certificate that identifies the trusted authority responsible for issuing certificates, allowing you to verify the authenticity of the Trust Anchor and the ETT's HISP certificate.

Can't find what you're looking for?

Please check out our Documentation or Archived section for more details.