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Myra EU CAPTCHA Online Help Updated · 25 Aug 2026

Glossary

This page explains the terms that occur in this documentation.

Terms

The following terms are in use:

Term Meaning
Assessment A verified request. The verification in the background and the corresponding server-side verification together count as one assessment. The number of the assessments each month determines the plan. See Book a plan.
Bouncer Standalone upstream server that connects the decisions of CrowdSec with the Myra EU CAPTCHA. See CrowdSec.
Challenge Computing task that the browser of the visitor solves in the background. The token comes out of the solution. See How EU CAPTCHA works.
Content Security Policy Policy of a website that specifies to the browser the sources from which it can load content. It must permit the addresses of the Myra EU CAPTCHA. See Content Security Policy.
Difficulty Effort of a challenge. The analysis shows the levels 0 to 7. The initial value for each sitekey contains the levels 0 to 3. See Configuring a sitekey.
Org Admin Role in an organization. It permits the administration of the members and of the login through SAML. See Assign and revoke the Org Admin role.
Passkey Key on the device of the users that replaces the password at the login. See Create a passkey.
Proof of work Procedure in which the client solves a computing task before a request is accepted. For single users, the effort is unnoticeable; for mass access through bots, it becomes expensive. See How EU CAPTCHA works.
SAML Procedure for the login through the identity provider of a company. See Set up SAML.
Secret Secret value of a sitekey. It belongs on the server only and identifies the calls of the API. See Details.
Sitekey Public value that marks a protected domain. It is located in the widget of the page. See Creating a sitekey.
Token Result of a solved challenge. The widget puts it into the eu-captcha-response form field. The server verifies it through the /verify endpoint. Each token is valid one time only. See Verify a client token.
train mode Condition in which the API skips the verification and sets success permanently to true. The response then contains train: true. See Configuring a sitekey.
verify.js Script of the widget. It creates the challenge in the browser and puts the token into the form. See Embedding the widget.
Widget Component that you embed into your form. It runs the challenge and hands over the token. See Embedding the widget.