Tag ID Format

Signal Tag identifier format and generation recommendations.

Tag ID format

Signal Tags recommends a prefixed identifier style:

st_<opaque-id>

Examples:

• st_01HZXK7M2N3P4Q5R6S7T8U9V
• st_example_001

Rules

• Prefix with st_.
• Use globally unique opaque IDs.
• Avoid embedding direct PII or sensitive business data in the ID.

Verify resolution

The ID resolves through a verify endpoint pattern such as:

GET /verify/{tagId}