Configure how the tool calls your API.
Available variables
Use these tokens in the URL, Headers, Body, or Query fields below — they are substituted at call time.
{{secrets.KEY_NAME}}- A value from your stored secrets (e.g. an API key).
{{params.PARAM_NAME}}- A value the AI passes for one of this tool's parameters (defined above).
Auto-injected — set by the system, always available (no parameter needed):
{{params._external_resource_id}}- The conversation's external reference (e.g. the CRM contact/call id set when the conversation was created), so a request can target the right call/contact.
{{params._timestamp}}- The current time as an ISO 8601 timestamp (UTC), e.g.
2026-07-22T18:03:00Z.
{{params._date}}- The current date as
YYYY-MM-DD.