How many x402 listings get called?
In short
- We wanted to know how much of Coinbase's x402 catalogue is used, so that a seller or a buyer can tell what a listing is worth.
- The catalogue lists 40 231 endpoints from 2 379 hosts, and publishes a 30-day call count and unique-payer count for each. 39 374 of them report a count.
How much is not used
- 27 527 listings (69.9%) were called twice or less, and 18 602 (47.2%) were called exactly once, by one payer.
- Each extra listing adds only a few calls. The typical seller gets about 3 calls per listing, whether it has one listing (3.0) or 100 or more (3.1). One host lists 13 666 endpoints and reports 16 015 calls.
- Seven listings report 1 000 calls or more from two payers or fewer. Many calls from one or two payers means few customers.
How much is used
- The busiest 394 listings, the top 1%, account for 86.0% of the 899 102 calls. Three hundred listings with 100 calls or more hold 85.1%.
- 141 listings, from 48 different sellers, are used by at least 10 payers and have at least 100 calls. They are described at the end.
An x402 seller who wants to know where demand sits has one free place to look: the discovery
catalogue Coinbase serves without a key. Each listing carries a quality block
with its calls and unique payers over the last 30 days, its last call, and nothing else about
the buyer. We read the whole catalogue on 9 October and again on 16 October and ran the same
arithmetic on both. This piece reports what those counts say and what they leave out.
Most listings have been called once or twice
The 16 October read returned 40 231 listings. Of those, 857 carry no call count, and we leave them out of every rate below and do not count them as zero. That leaves 39 374.
| 9 Oct | 16 Oct | |
|---|---|---|
| listings reporting a count | 35 194 | 39 374 |
| called twice or less in 30 days | 24 261 (68.9%) | 27 527 (69.9%) |
| called once, by one payer | 14 977 (42.6%) | 18 602 (47.2%) |
| calls held by the top 1% of listings | 87.7% | 86.0% |
| listings with 100 calls or more | 282 | 300 |
| share of calls those 100+ listings hold | 87.0% | 85.1% |
The shape held across the week while the catalogue grew. Listings reporting a count rose by 4 180, and the one-call row rose by 3 625. The catalogue cannot say why a listing has a single call. A setup or test call is one plausible reading and a lone real customer is another, and the counts do not separate them. What they do say is that for most of the shelf, nobody has come back.
More listings add a few calls each
We grouped listings by the address they pay to and compared sellers of different sizes on the 16 October reading. A seller's calls per listing, taken at the median, is about the same at every size.
| listings per seller | sellers | listings | calls | median calls per listing |
|---|---|---|---|---|
| 1 | 618 | 618 | 15 066 | 3.0 |
| 2 to 9 | 658 | 2 648 | 469 484 | 3.7 |
| 10 to 99 | 337 | 9 084 | 321 543 | 3.6 |
| 100 or more | 43 | 27 024 | 93 009 | 3.1 |
The 43 sellers with 100 or more listings hold 27 024 listings and get 3.4 calls per listing
taken together. market.datapackvibe.com lists 13 666 endpoints and reports 16 015
calls, about 1.2 per listing. www.ax1.vc lists one endpoint, a verdict on a Base token
contract at 0.02 USDC, and reports 348 278 calls from 3 098 payers. The median ask across the
whole catalogue is 0.01 USDC, so adding listings is free for a seller and adds a few calls
each. The high-traffic sellers are mostly small. Nine of the ten most-called sellers have 113
listings or fewer.
Calls need their payer count beside them
A call count is easy to produce from one wallet. Fifty-four listings report 1 000 calls or more; seven of those report two payers or fewer, together 47 550 calls. Someone who quotes a seller's call count without its unique payers is quoting the number that is cheaper to inflate. Even the payer count is a floor on buyers and not a count of them: it counts paying addresses, and one operator can fund a fleet of them.
What this shows
Most listings had almost no use in the last month. A few listings carry nearly all of it. The typical seller gets about three calls per listing whatever the size of its catalogue, so a larger catalogue adds a few calls per listing and the big call counts sit elsewhere. A call count also means little without the number of payers behind it. The shape was the same in both readings, a week apart.
What this does not show
- Not money. These are the catalogue's own counts. We have not matched them to settlement transactions in this piece, so they say how often an endpoint was called and not what anyone paid.
- The counts are Coinbase's. We did not re-measure them. If the catalogue under-counts calls that settle through another facilitator, the shelf is busier than this.
- Two snapshots, a week apart, each a single instant, over a 30-day window that overlaps itself. They show the shape is stable, not that it is permanent.
- The 857 listings with no count are left out, and we do not know whether they are quieter or busier than the rest.
What to do with it
A seller on x402 should not treat a longer listing page as distribution, since one call is the baseline for most of the shelf. A buyer should read calls and unique payers together and count a seller with many calls and one payer as a single customer. We sell ads to agents, and the same arithmetic applies to us. A count of placements is the cheap number, and what an agent did next is the one worth reporting.
Both snapshots, one row per listing with its calls, payers and last call, are public: x402-bazaar-2026-10-09.csv and x402-bazaar-2026-10-16.csv. Every figure above can be recomputed from them in a few lines of SQL.
How many listings are used
We count a listing as used if it had at least 100 calls from at least 10 different payers in the 30 days. 141 of the 39 374 listings meet that, 0.4% of them, from 48 different sellers. Together they account for 645 377 calls, 71.8% of all calls. Among the busiest, this is what they do:
www.ax1.vcgives a plain-language verdict on a Base token contract (348 278 calls, 3 098 payers).blockrun.aisells AI chat completions per request (79 883 calls, 263 payers).x402.sniperx.funreturns smart-money trading activity on a token (22 936 calls, 17 payers).stableenrich.devruns a neural web search (19 801 calls, 172 payers).keyring-agent.blockchhub.linktakes the fee for executing a native-coin transfer (14 193 calls, 55 payers).win.oneshotagent.comreads a web page into markdown with a screenshot (12 921 calls, 10 payers).agent.pocket.networkis a messaging network for agents (10 583 calls, 32 payers).www.api-xpay.comanswers a health-check ping (5 943 calls, 177 payers).