x402 APIs statistics
What our own probes see across 24,506 x402 APIs: how many answer, which protocol versions they speak, how ready they are for an agent to call, and what they cover. All protocols
As of 2026-11-12 01:39 UTC Methodology JSON CSV Cite
41.1% of indexed x402 APIs answer our probe, and 31.2% return a valid 402 challenge.
Each step keeps only the listings that passed the one before. Indexed is everything any source lists; the last step is our readiness grade A or B.
x402 APIs
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Indexed24,506100.0% of indexed
-
Has an endpoint24,506100.0% of indexed · 100.0% of previous
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Reachable10,06041.1% of indexed · 41.1% of previous
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Valid 402 challenge seen7,65831.2% of indexed · 76.1% of previous
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Readiness A or B5,22621.3% of indexed · 68.2% of previous
19.6% of x402 APIs are listed by more than one source.
Which directories and registries list what we index, and how many of their listings answered our last probe. A listing found by several sources is counted once in the index.
x402 APIs
| Source | Listings | Reachable |
|---|---|---|
| x402scan | 15,265 | 24.6% |
| cdp-bazaar | 4,492 | 62.7% |
| own crawl of MCP listings | 3,802 | 86.9% |
| own x402 crawl | 2,186 | 88.3% |
| own crawl of A2A cards | 1,635 | 79.4% |
| paygent-discover | 1,467 | 55.3% |
| awesome-x402 | 842 | 65.9% |
| provider submissions | 775 | 68.1% |
22.2% of verified x402 APIs were seen speaking x402 v2.
The protocol revision each reachable listing reports: the MCP version returned by initialize, the A2A version declared in the Agent Card, and the x402 version seen in the 402 challenge.
x402 version (resource probe)
| Version | Share | Count | % |
|---|---|---|---|
| v2 | 1,700 | 22.2% | |
| v1 | 244 | 3.2% | |
| Not recorded | 5,714 | 74.6% |
21.3% of x402 APIs grade A or B; 23.6% grade F.
Readiness grades whether an agent could call the listing today: protocol checks, declarations, uptime and freshness. It is shown on each listing and does not change search order, which uses the quality score.
Median response for x402 APIs is 205 ms; p95 is 1031 ms.
30-day uptime counts only listings with at least five probes; probes a host refused (HTTP 429, or a 403 we were not let through) are left out. Latency is the last successful probe from our server.
x402 APIs
- Median latency
- 205 ms
- p95 latency
- 1,031 ms
30-day uptime (23,910 tracked)
| Uptime | Share | Count | % |
|---|---|---|---|
| 100% | 8,770 | 36.7% | |
| 95–99% | 209 | 0.9% | |
| 80–94% | 609 | 2.5% | |
| 50–79% | 570 | 2.4% | |
| <50% | 13,752 | 57.5% |
The median x402 API's cheapest call costs $0.01; 67.2% charge a cent or less.
Prices are the cheapest call each reachable API advertises in its payment terms, in USD. They are list prices, not revenue. Payment evidence says how we know a listing takes payment at all.
Cheapest call per API (6,867 priced)
- p10
- $0.001
- p25
- $0.005
- p50
- $0.01
- p75
- $0.02
- p90
- $0.1
| Price band | Share | Count | % |
|---|---|---|---|
| ≤ $0.001 | 723 | 10.5% | |
| ≤ $0.005 | 1,106 | 16.1% | |
| ≤ $0.01 | 2,785 | 40.6% | |
| ≤ $0.05 | 1,284 | 18.7% | |
| ≤ $0.10 | 313 | 4.6% | |
| ≤ $1 | 494 | 7.2% | |
| > $1 | 162 | 2.4% |
Settlement network
| Network | Share | Count | % |
|---|---|---|---|
| Base | 6,937 | 90.6% | |
| Solana | 300 | 3.9% | |
| Not recorded | 197 | 2.6% | |
| Polygon | 61 | 0.8% | |
| Testnets | 34 | 0.4% | |
| Arc | 11 | 0.1% | |
| Stripe | 9 | 0.1% | |
| Other | 109 | 1.4% |
Payment evidence
| Strongest evidence | Share | Count | % |
|---|---|---|---|
| Live 402 challenge | 7,658 | 76.1% | |
| x402 manifest | 2,062 | 20.5% | |
| CDP Bazaar feed | 16 | 0.2% | |
| Catalog listing only | 323 | 3.2% | |
| No evidence | 1 | 0.0% |
'payment' is 8.7% of reachable A2A agents but 1.7% of MCP servers.
Share of reachable listings whose name or description mentions each topic word. Darker cells mean a larger share; compare across a row to see where one protocol has supply and another has little.
| Topic | x402 APIs |
|---|---|
| ai | 22.3% |
| search | 4.9% |
| data | 12.4% |
| github | 3.3% |
| payment | 8.5% |
| code | 3.6% |
| web | 4.9% |
| 2.4% | |
| video | 0.9% |
| llm | 2.9% |
| crypto | 4.8% |
| wallet | 5.1% |
| image | 1.7% |
| 1.2% | |
| analytics | 0.9% |
| document | 1.2% |
| security | 2.4% |
| social | 1.2% |
| news | 1.4% |
| knowledge | 0.4% |
Largest gaps
- payment: 8.7% of A2A agents, 1.7% of MCP servers
- wallet: 5.1% of x402 APIs, 0.9% of MCP servers
814 x402 APIs were first seen in the last 7 days; 673 went down.
Listings by the day any source first showed them to us, over the last 30 days. Our crawlers started at different dates, so early spikes partly reflect when a source was added.
x402 APIs
- New in 7 days
- 814
- Went down in 7 days
- 673
GitHub data collected so far for 16,071 of 18,491 reachable MCP servers that link a repository; figures fill in over the coming days.
Signals from outside our probes: GitHub stars of the source repository, npm downloads, and where the site ranks in the Tranco top-1M list. They describe attention, not quality, and do not affect search order.
Site rank in Tranco top 1M (list of 2026-11-10)
| Protocol | Top 10k | 10k–100k | 100k–1M | Ranked |
|---|---|---|---|---|
| x402 APIs | 54 | 91 | 112 | 2.6% |
Ranked by the domain an agent calls (MCP endpoint, x402 URL, A2A interface). Domains behind more than 20 of our listings, hosting platforms and content sites such as youtube.com or github.com are left out.
Methodology
Every number is a count over the agent-tools.cloud index at the time shown above, recomputed once a day after our probes run. It is not a census of the whole ecosystem: listings no public source has shown us are missing, and private deployments are invisible to us.
Funnel. Reachable means the last probe got a valid answer. Verified means a valid 402 challenge for x402, a full MCP initialize plus tools/list, or an A2A JSON-RPC reply on the declared interface.
Sources. Duplicates across sources are merged by endpoint; each source a listing came from is kept.
Protocols. Versions are what the listing reports or declares; we do not infer them from behaviour. A2A signatures are verified against the key the card points to on its own site.
Readiness. Criteria and weights are on the About page. Points earned from live probes decay after 30 days without a fresh one.
Reliability. One probe per listing per day from one server; latency includes our network path and is not a provider SLA.
x402. Price per API is the lowest amount its payment terms ask for one call, in USD (USDC read at par). The x402 version is counted only where our resource probe recorded it. Settlement network falls back to the chains a listing declares when the challenge does not name one.
Access. Declared by the listing or its card; not tested with credentials.
Safety. Pattern rules over tool metadata only; no code is executed.
Topics. Whole-word match of a fixed word list on name and description. Listings whose text names more than five topics (gateway catalogues) are left out: 1,202 x402 APIs, 170 MCP servers, 54 A2A agents.
Growth. Earliest first-seen date across a listing's sources.
Adoption. GitHub stars and last push from the GitHub REST API for the repository a listing links as its source; npm downloads over 30 days from the npm downloads API for packages published on npm; site rank from the Tranco research list (registrable domain). Several listings can share one repository. These are attention signals, not measures of quality, and are not used for ranking.
Cite and download
Free to reuse under CC BY 4.0 with a link to this page. The full snapshot is at /stats.json; headline numbers for every day are at /stats/daily.csv.
agent-tools.cloud. "The state of agent tools." 2026-11-12. https://agent-tools.cloud/stats
@misc{agenttools_stats_20261112,
author = {agent-tools.cloud},
title = {The state of agent tools},
year = {2026},
note = {Snapshot 2026-11-12 01:39 UTC},
url = {https://agent-tools.cloud/stats}
}