Do x402 endpoints change their price or payment address?
Answered from the issue named below, as published on its date. A later issue is a later answer, at its own address.
The answer
Of 6,835 endpoints quoted 21–31 August (22,318 observations), 33 changed their payment address between observations (281 changes; one endpoint changed on nearly every observation) and 73 changed price. A buyer relying on a cached quote — price or address — could act on obsolete terms.
(2) The OBSERVED population: every endpoint on probe402's seed that produced at least one graded observation inside the sealed window of 21–31 August 2026, joined to a third party's published label for the row whose address is the exact route we probe; an endpoint we did not grade, or whose label read failed, is outside every joined figure and is counted rather than dropped.
The sentence above is quoted from a published issue and is not re-written here. Its date, its population and the record behind it are below.
What this does not say
- Nothing here is a statement that a sale completed. A payment challenge shows that a price was offered in a machine-readable form; it does not show that anything was paid or delivered.
The evidence
What ran, when, and the record it produced.
| What ran | When | Record |
|---|---|---|
| Every quoted observation of the window compared with the one before it on the same route: price movements and payment-address movements counted as separate classes, amounts diffed in atomic units and never across a change of asset, network or scheme. | 7b5a7bc5b4ec77190ae4048f1f0f492ea4b79ef30ca90290893aabd5ab2c93cc |
- Sealed days behind the archive figures
- 11
- Observations in that window
- 29,022
- Issue
- Machine Commerce Reality Index: #001 — August 2026
- Published
The terms
The terms this question uses are defined in the glossary.
Corrections and disputes
Corrections to this issue are on the corrections register, and this answer reads from the record rather than from a copy.