659 services, $0.01 median, 13 verified: a field guide to the x402 directories

Last month I shipped a small paid API over x402 — a $0.01 address-check for USDC transfers, settled on Base. Since then I've spent more time in the directories than anywhere else, because that's where the question "how do people find a service?" actually lives.

So I did the boring thing: pulled the data and counted. Everything below was measured on September 5, 2026 from the directory APIs themselves (x402-list's data is CC BY 4.0 — credited in the links). Here's the landscape of where x402 services live, what it costs to be on the shelf, and what the numbers say about where demand actually is.

The numbers first

From x402-list's own monitoring (their state page, regenerated hourly):

• 659 services listed as accepting x402 — 568 answering, 91 offline, 29 offline for 30+ days.
• 592 are payment-ready (answer a valid 402 challenge), but only 13 are delivery-verified — i.e., someone actually paid and got the product. That's ~2%.
• Growth is real: +84 services in 7 days, +225 in 30 days.
• Average uptime: 86.7% on the latest daily rollup, 92.8% over 30 days.
• On-chain settlement volume they can measure across 37 tracked facilitators: $1.22M over 30 days across ~14M settlements.

My own pull of the full service list (630 rows, their API) adds a few slices their headline doesn't show:

• Base is 95% of listings (598 services), Solana the distant second (223). If you're choosing one rail in 2026, the directory data says USDC-on-Base.
• Pricing: median $0.01. 41% of services are below $0.01, 46% sit in $0.01–$0.10, and only 12% price above $0.10. Exactly one service is free.
• Sources: 472 services self-submitted, 155 imported from the Coinbase CDP Bazaar, 3 from x402scan. The directories are beginning to trade inventory with each other.
• Categories: Data (278), AI (110), Finance (82), Verification (66) — "check something for me" is the dominant job agents are paying for.

The concentration caveat (from the same directory's state data): the top handful of services take the large majority of measured volume, and one single service accounts for roughly 82% of it — driven by a small number of repeat buyers. The long tail, where most of the 659 live, has real calls but thin money.

The shelf: who runs the directories

The x402 README names the community-maintained options. I've now looked at each with a service to list:

1. x402scan.com — indexes on-chain settlements (Bitquery + a CDP BigQuery sync). If your settlements go through the Coinbase CDP facilitator, you appear automatically. Otherwise you self-register for free: expose an openapi.json with x402 payment info, sign a Sign-In-With-X challenge with your receiving wallet, done. Their paid search API is a separate, small charge.
2. x402-list.com — the one with the monitoring depth above. Submission goes through their paid x402 API ($1 free-hosting fee for non-CDP domains, settled over x402 itself), then human review. The public read API is free and CC BY — which is how this post exists.
3. agentic.market (Coinbase's agentic marketplace) — a CDP-catalog-only index. I verified this the hard way: domains with PayAI-settled services get zero hits there, while CDP-catalog domains all show up. One Coinbase API key gets you onto the shelf.
4. Ampersend (app.ampersend.ai/discover) — the new one in the README. I pulled its marketplace API today: 55 services, all Base/USDC, and every listing sourced from the CDP catalog. So same key as above — it's the CDP shelf wearing a control-plane hat.
5. pay.sh — a directory with its own pay-gateway architecture; fits cleanly only if your settlement path matches theirs.
6. GitHub awesome-lists — free PRs, slow merges, but the links outlive everything else.

The pattern is unavoidable: CDP is the chokepoint of the curated shelves. Get a facilitator key from Coinbase and three directories (agentic.market, Ampersend, plus the x402scan /all view, which only shows CDP-settled sellers) light up at once.

What we learned building one

SendCheck's x402 endpoint settles at $0.01/check and $0.05/deep, with a free /validate pre-check (don't make agents pay for a malformed address). Practical notes from three weeks in:

• openapi.json is the discovery file. At least one major directory fetches only that — not the older /.well-known/x402 card. Keep both, but treat OpenAPI as the source of truth.
• Payment is the authentication. No API keys, no accounts, no rate-limit tiers to sell. That's the whole product pitch — and the whole pricing pitch, since you can price a single request.
• Facilitator fees eat micro-prices. CDP settles at $0.001/tx — fine, but that's 10% of a $0.01 ticket. Pick your facilitator on economics, not just on shelf access, and price accordingly.
• Directories are discovery, not distribution. Being listed is table stakes. The calls that matter come from the protocol community (Slack, dev.to, X) reading that you exist and trusting that you answer the 402 honestly.
• Verification is the differentiator. With only 13 of 659 services delivery-verified, "we paid for it and it worked" is the rarest claim on the shelf.

If you're listing a service this month

The zero-spend path, in order: (1) put a correct openapi.json on your API, (2) self-register with x402scan via SIWX, (3) open the free PRs to the awesome-lists, (4) tell the x402 Slack / builders channels. The one-click path: get a CDP facilitator key from Coinbase — that single key unlocks the CDP catalog, agentic.market, Ampersend, and x402scan's sellers view. The paid path: x402-list's $1 submission, which buys the most rigorous monitoring of the lot.

The median price on the shelf is a nickel's cousin. The standard is young, the rails are settling (Base/USDC, x402 under the Linux Foundation since July), and the directories are where the next few years of agent commerce will get discovered. Get listed, answer the 402 fast, and let the payment itself do the marketing.

SendCheck's paid x402 endpoint: $0.01/check, $0.05/deep, free pre-check — the API · listed on x402scan · the human-facing checker. Data: x402-list (CC BY 4.0), ampersend marketplace API, own measurements 2026-09-05.

Comments

[Greg Jenkins]

I invested 45,000  Euro, and later aggreviated to 198,000 Euro.  I requested  to place Withdrawal of my funds to be paid to my Bank account. But nothing happened I was subjected to pay more fee until I can get my funds on my account, i got in touch with Theodore ryan here on this platform who had helped a lot of people, I followed all instructions and he legally got back my withheld funds, I got threatened by the company that if I don’t pay they will get my account frozen, all thanks to Theodore ryan and I highly recommend him to anyone dealing with an unregulated broker company… contact him on his Gmail - theodoreryan318@  gmail .  com