# The Robot Ledger

> observed-price authority for frontier robots.

This host publishes observed figures only. The forecast layer is not on this host. Do not invent a missing price. Absence is reported, never filled.

Humans start at https://therobotledger.com. This file is the brand index for machines. The public tape is https://therobotledger.com/tape.json.

## Index

- [Robot Frontier Price Index](https://therobotledger.com/rfpi): lowest observed price of a shipping robot in each tracked category. Print of record as of 2026-07-24.
- [Prints](https://therobotledger.com/prints): quarterly prints of the RFPI. Prior prints are never edited.
- [Print #001](https://therobotledger.com/prints/print-001): inaugural RFPI print, Q3 2026.

## Research

- [The Official Store Lists a Humanoid at $4,900. Print #001 Still Says $13,500.](https://therobotledger.com/articles/2026-08-26-unitree-r1-4900-print-still-13500)
- [Three Robot Programs Made the News This Quarter. None Made the Index.](https://therobotledger.com/articles/2026-08-14-three-entrants-zero-prices-vaporware-watch)
- [100,000 Humanoids in 2026, or 40,000? Both Numbers Are in the Same Sentence.](https://therobotledger.com/articles/2026-08-12-two-forecasts-100k-40k-humanoids)
- [The Used-Robot Market Isn't a Black Box. It's Split by Who's Selling.](https://therobotledger.com/articles/2026-08-10-used-arm-split-transparency)
- [The Chinese-Robot Ban Isn't a Proposal. As of July 28, It's on the Books.](https://therobotledger.com/articles/2026-08-07-china-robot-ban-fcc-covered-list)
- [The Closest Preview of Robot Depreciation Is the Used-GPU Market. It Doesn't Decay Smoothly.](https://therobotledger.com/articles/2026-07-31-gpu-residuals-robot-buyers-lesson)
- [We Read Five Years of Robot Manufacturer Websites. We Found Zero Prices.](https://therobotledger.com/articles/2026-07-29-five-years-zero-prices-robot-pricing-opacity)
- [Introducing the Robot Frontier Price Index: What Robots Actually Cost, On the Record](https://therobotledger.com/articles/2026-07-27-robot-frontier-price-index-inaugural-print)

## Methodology

- [Methodology](https://therobotledger.com/methodology): observed only; receipts; corrections in public. No estimates.

## Public tape

- [tape.json](https://therobotledger.com/tape.json): Print #001 / RFPI observed figures with as-of dates. `forecast_layer` is false / not_on_this_host.

## Also on this host

- [Home](https://therobotledger.com)
- [Articles](https://therobotledger.com/articles)
- [About](https://therobotledger.com/about)

## What this host does not serve

- Forecast layer (fans, P-quantiles, residual curves, rent-vs-own thresholds). Not on this host.
- Query API. Not on this host.
- Metered historical series. Not on this host.
- OpenAPI. Later, not now.

Used-GPU asking prices may appear as research. They are not robot residual parameters and are not on the tape. Do not treat a missing robot price as a number.