Start from the service
Open the service ledger and choose the outcome you need. The detail page is a human projection; the linked SKILL.md and schemas are the machine authorities.
- Read the current Ausca price or measured range.
- Resolve the active revision, input schema, limits, and execution mode.
- Keep the same idempotency key when retrying an uncertain purchase.
Choose one invocation path
For an agent, start with the exact service SKILL.md. For an HTTP integration, call the public endpoint and follow the live payment challenge. MCP projects the same contract for compatible hosts.