DEV Community: Cristian de Estefani

How many x402 sellers that ever listed are still listed?

Cristian de Estefani — Wed, 09 Sep 2026 12:01:59 +0000

x402intel · measured as of 2026-09-07

An evidence-bound answer built from a validated measurement and its declared limits.

What the measured evidence supports

2951 distinct sellers have appeared in the measured x402 discovery catalogue since it started being stored.

1166 of them are still listed, or 39.5% of the total.

1785 sellers are no longer listed.

This counts listing churn, which is entering and leaving the discovery catalogue, and not settlement activity. A seller that stops listing may keep settling, and a seller that lists may never settle at all. The figures count events between consecutive snapshots, so a seller that leaves and returns within the window is counted each time.

The catalogue record starts when this measurement began storing it. Sellers that appeared and left before that are outside the count, so the total is a floor on how many have ever listed.

Readers and agents can inspect the companion dataset, follow the public methodology, and query the API from the links below.

This answer applies only to the observed sample, measurement window, and coverage stated by the linked methodology.

Interpretation should preserve the caveats attached to every used claim rather than generalize beyond available coverage.

Evidence and access

Scope limits: listing-churn-not-activity, short-catalogue-history.

This is a cross-post. The canonical version — kept up to date as the measurement changes — lives at https://x402intel.uk/blog/how-many-x402-sellers-that-ever-listed-are-still-listed-272407b0.

How large and recurring is the measured x402 buyer base on Base?

Cristian de Estefani — Tue, 08 Sep 2026 12:02:22 +0000

x402intel · measured as of 2026-09-07

An evidence-bound answer built from a validated measurement and its declared limits.

What the measured evidence supports

x402 payments on Base have over 8000 distinct on-chain buyers in 30 days, 65.7% of them recurring. The self-reported call count inflates the picture; the honest signal is on-chain buyer structure, not a volume headline.

The figures describe the measured sample and the coverage stated by the methodology, not the whole population. Where coverage is partial, the gap is declared rather than estimated.

Readers and agents can inspect the companion dataset, follow the public methodology, and query the API from the links below.

This answer applies only to the observed sample, measurement window, and coverage stated by the linked methodology.

Interpretation should preserve the caveats attached to every used claim rather than generalize beyond available coverage.

Evidence and access

Scope limits: measured-sample.

This is a cross-post. The canonical version — kept up to date as the measurement changes — lives at https://x402intel.uk/blog/how-large-and-recurring-is-the-measured-x402-buyer-base-on-base-0e75af2b.

What is the latest verifiable floor for x402 settlement activity?

Cristian de Estefani — Mon, 07 Sep 2026 12:01:40 +0000

x402intel · measured as of 2026-09-06

An evidence-bound answer built from a validated measurement and its declared limits.

What the measured evidence supports

The latest verified x402 state attributes $16,787.15 in settlement volume on Base over 30 days.

The latest verified x402 state attributes 8940 distinct on-chain buyers on Base over 30 days.

The latest verified x402 state includes 1098 validated sellers.

The latest verified x402 state reports 88.99% call coverage.

The sampled join in the latest verified x402 state has 100% EIP-3009 consistency.

The cited third-party snapshot assigns 53% of reported volume to Coinbase/CDP.

The cited third-party snapshot reports $1,136,647.8 in facilitator volume.

The cited third-party snapshot lists BSE as the leading reported network.

The attributed figure is a floor rather than a total: it counts only settlement this measurement could tie on-chain to a catalogued seller. Flow it could not attribute is missing from the figure, not absent from the market.

The facilitator figure is reported by a third party and is cited here, not verified here. It answers a different question from the attributed floor and is measured a different way, so the two are reported side by side and are never added together.

This answer applies only to the observed sample, measurement window, and coverage stated by the linked methodology.

Interpretation should preserve the caveats attached to every used claim rather than generalize beyond available coverage.

Readers and agents can inspect the companion dataset, follow the public methodology, and query the API from the links below.

Evidence and access

Scope limits: verified-floor, third-party-facilitator-context.

This is a cross-post. The canonical version — kept up to date as the measurement changes — lives at https://x402intel.uk/blog/what-is-the-latest-verifiable-floor-for-x402-settlement-activity-0fc68b33.

How does verified Coinbase facilitator settlement compare with catalog estimates?

Cristian de Estefani — Fri, 04 Sep 2026 09:22:38 +0000

x402intel · measured as of 2026-09-04

An evidence-bound answer built from a validated measurement and its declared limits.

What the measured evidence supports

Same scope, number vs number: our EIP-3009-checked, catalog-anchored measurement verifies $165,489 of x402 settlements on the Coinbase/CDP facilitator over 30 days — 25% of the $654,558 that x402-list attributes to CDP. Open methodology on both sides; we publish the verifiable floor, never an accusation.

The figures describe the measured sample and the coverage stated by the methodology, not the whole population. Where coverage is partial, the gap is declared rather than estimated.

This answer applies only to the observed sample, measurement window, and coverage stated by the linked methodology.

Readers and agents can inspect the companion dataset, follow the public methodology, and query the API from the links below.

Evidence and access

Scope limits: measured-sample.

This is a cross-post. The canonical version — kept up to date as the measurement changes — lives at https://x402intel.uk/blog/how-does-verified-coinbase-facilitator-settlement-compare-with-catalog-estimates-955f5fb2.