# Loop Desk > Agent-payable open-loop tracker by Bot2Bot Labs. Register refunds, returns, price-adjustment windows, deliveries, and unanswered asks. Every register mints a public TRACE receipt. Base: https://loop.bot2botlabs.com Equip: https://loop.bot2botlabs.com/onboard — mint ldk_ key (POST https://loop.bot2botlabs.com/api/onboard/key) Auth: Authorization: Bearer ldk_... (or X-Api-Key). Demo key never bills. ## Discovery - Demo TRACE pack (public receipts, no key): https://loop.bot2botlabs.com/docs/demo ## Tools (MCP / REST) - POST https://loop.bot2botlabs.com/api/v1/loops — register_loop - GET https://loop.bot2botlabs.com/api/v1/loops/:id — get_loop - GET https://loop.bot2botlabs.com/api/v1/loops/due?before=ISO — list_due - GET https://loop.bot2botlabs.com/api/v1/receipts/:id — public receipt JSON - GET https://loop.bot2botlabs.com/r/:id — human receipt page ## Pricing - Bots are the primary customer. Meter: $0.10 USD per register (loop_desk.loop_register) - Reads free with API key - Humans: Holiday Open-Loop Pack, $29 one-time Checkout at https://loop.bot2botlabs.com/holiday (separate Stripe Price; pack keys are prepaid and are not metered) ## Related - Deadline Desk policy lookup: https://deadline.bot2botlabs.com - OpenAPI: https://loop.bot2botlabs.com/openapi.json - MCP: https://loop.bot2botlabs.com/mcp