Agent Tools
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The state of agent tools

What our own probes see across 92,977 listings (x402 APIs, MCP servers and A2A agents): how many answer, which protocol versions they speak, how ready they are for an agent to call, and what they charge.

As of 2026-11-11 06:00 UTC Methodology JSON CSV Cite

Indexed
92,977
Trend starts 2026-11-11
Listings in our index
Reachable
68,894
Trend starts 2026-11-11
74.1% of indexed · Answered the last probe
Protocol verified
44,064
Trend starts 2026-11-11
47.4% of indexed · 402 challenge · MCP handshake · A2A JSON-RPC
Readiness A or B
39,783
Trend starts 2026-11-11
42.8% of indexed · Ready for an agent to call
01 · Funnel

Only 55.9% of indexed MCP servers complete a full handshake, and 30.0% of A2A agents answer JSON-RPC.

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

  1. Indexed24,410
    100.0% of indexed
  2. Has an endpoint24,410
    100.0% of indexed · 100.0% of previous
  3. Reachable10,037
    41.1% of indexed · 41.1% of previous
  4. Valid 402 challenge seen7,650
    31.3% of indexed · 76.2% of previous
  5. Readiness A or B5,164
    21.2% of indexed · 67.5% of previous

MCP servers

  1. Indexed61,233
    100.0% of indexed
  2. Has a remote endpoint60,610
    99.0% of indexed · 99.0% of previous
  3. Reachable52,570
    85.9% of indexed · 86.7% of previous
  4. Full handshake (initialize + tools/list)34,215
    55.9% of indexed · 65.1% of previous
  5. Readiness A or B33,630
    54.9% of indexed · 98.3% of previous

A2A agents

  1. Indexed7,334
    100.0% of indexed
  2. Has an Agent Card URL7,239
    98.7% of indexed · 98.7% of previous
  3. Card fetched6,287
    85.7% of indexed · 86.8% of previous
  4. Answers JSON-RPC2,199
    30.0% of indexed · 35.0% of previous
  5. Readiness A or B989
    13.5% of indexed · 45.0% of previous
Measured 2026-11-11 06:00 UTC from the latest probe of every listing. Method JSON
02 · Sources

42.2% of MCP servers are listed by more than one directory.

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

SourceListingsReachable
x402scan15,21724.9%
cdp-bazaar4,47562.7%
own crawl of MCP listings3,80387.2%
own x402 crawl2,18687.6%
own crawl of A2A cards1,63580.8%
paygent-discover1,46755.3%
awesome-x40284265.9%
provider submissions77468.0%
Listed by more than one source: 19.7%

MCP servers

SourceListingsReachable
mcp-registry40,45790.9%
agenstry19,50279.4%
own /.well-known crawl17,64993.6%
smithery13,41283.3%
capkey9,48496.7%
pulsemcp5,33179.8%
chiark2,98668.7%
apify79090.0%
Listed by more than one source: 42.2%

A2A agents

SourceListingsReachable
agenstry5,26387.1%
own /.well-known crawl2,47791.2%
a2a-registry1,03591.9%
a2aregistry85683.6%
provider submissions15588.4%
chiark950.0%
awesome-a2a5090.0%
manual1172.7%
Listed by more than one source: 23.8%
Source membership as recorded by our crawlers; reachability from the latest probe. Method JSON
03 · Protocols

29.1% of reachable A2A agents declare 1.x; 1.3% carry a signature that verifies.

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.

MCP protocol version

RevisionShareCount%
2026-07-28
3,997 7.6%
2025-11-25
18,500 35.2%
2025-06-18
5,435 10.3%
2025-03-26
5,758 11.0%
2024-11-05
1,397 2.7%
Non-standard
20 0.0%
Not reported
17,463 33.2%

A2A protocol version

DeclaredShareCount%
1.x
1,829 29.1%
0.3
2,259 35.9%
0.2 and older
140 2.2%
Other
91 1.4%
Not declared
1,968 31.3%

Agent Card signatures: 84 verify, 225 present but do not verify, 5,978 unsigned.

x402 version (resource probe)

VersionShareCount%
v2
982 12.8%
v1
217 2.8%
Not recorded
6,451 84.3%
Reachable listings only, as of 2026-11-11 06:00 UTC. Method JSON
04 · Readiness

Reachable A2A agents lose the most readiness points on Live JSON-RPC and JWS signature.

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.

ProtocolGrade mixABCDF
x402 APIs 1,240
5.1%
3,924
16.1%
3,243
13.3%
10,203
41.9%
5,767
23.7%
MCP servers 964
1.6%
32,666
53.3%
1,516
2.5%
17,155
28.0%
8,932
14.6%
A2A agents 51
0.7%
938
12.8%
1,572
21.4%
2,455
33.5%
2,318
31.6%

Where reachable A2A agents lose points (average per agent)

Live JSON-RPC
−13.9
JWS signature
−9.8
Verified identity
−6.3
Protocol version
−5.2
Security declaration
−4.4
Skill declaration
−3.1
Freshness + modern flags
−2.1
Valid Agent Card
−0.6
Uptime (30 days)
0
Grades stored by the daily readiness job. Method JSON
05 · Reliability

Median response is 371 ms for MCP and 222 ms for x402.

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
222 ms
p95 latency
1,071 ms

30-day uptime (23,796 tracked)

UptimeShareCount%
100%
8,700 36.6%
95–99%
218 0.9%
80–94%
587 2.5%
50–79%
572 2.4%
<50%
13,719 57.7%

MCP servers

Median latency
371 ms
p95 latency
1,186 ms

30-day uptime (58,798 tracked)

UptimeShareCount%
100%
46,745 79.5%
95–99%
2,518 4.3%
80–94%
1,433 2.4%
50–79%
686 1.2%
<50%
7,416 12.6%

A2A agents

Median latency
373 ms
p95 latency
1,125 ms

30-day uptime (0 tracked)

Probe history is still building; uptime appears once listings have five probes.

Probe history of the last 30 days, as of 2026-11-11 06:00 UTC. Method JSON
06 · x402 economy

The median x402 API's cheapest call costs $0.01; 65.1% 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 (6,771 priced)

p10
$0.002
p25
$0.008
p50
$0.01
p75
$0.03
p90
$0.15
Price bandShareCount%
≤ $0.001
597 8.8%
≤ $0.005
1,050 15.5%
≤ $0.01
2,758 40.7%
≤ $0.05
1,323 19.5%
≤ $0.10
329 4.9%
≤ $1
533 7.9%
> $1
181 2.7%

Settlement network

NetworkShareCount%
Base
6,942 90.7%
Solana
279 3.6%
Not recorded
195 2.5%
Polygon
60 0.8%
Testnets
34 0.4%
Arc
15 0.2%
Stripe
9 0.1%
Other
116 1.5%

Payment evidence

Strongest evidenceShareCount%
Live 402 challenge
7,650 76.2%
x402 manifest
2,072 20.6%
Catalog listing only
315 3.1%
Reachable x402 APIs, latest 402 challenge. Method JSON
07 · Access

72.6% of reachable MCP servers do not say how to authenticate.

How a caller is expected to authenticate, as declared by the listing. MCP servers that accept x402 are counted as pay-per-call even when they also take a key.

MCP servers

Declared accessShareCount%
Open (declared)
174 0.3%
API key or token
14,062 26.7%
OAuth
124 0.2%
x402 pay-per-call
30 0.1%
Not declared
38,180 72.6%

A2A agents (Agent Card security)

Declared schemeShareCount%
mTLS
75 1.2%
OAuth2 + PKCE
120 1.9%
Other declared scheme
1,048 16.7%
Declared public
347 5.5%
Not declared
4,697 74.7%
Reachable listings, declarations only; we do not attempt to log in. Method JSON
08 · Safety

32 MCP servers are flagged by our static safety scan.

A static scan of MCP tool names and descriptions for prompt-injection and data-exfiltration patterns. Flagged servers stay listed with a warning; a clean result is not a security review.

Verdicts (60,610 scanned)

clean
60,578
suspicious
32
malicious
0

Rules that fired

tool poisoning coercion
18
data exfil coercion
6
prompt injection
5
bare ip url
2
install lure
1
Scan stored with each MCP listing. Method JSON
09 · Topics

'payment' is 8.6% 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.

Topicx402 APIsMCP serversA2A agents
ai 22.3% 24.4% 33.3%
search 4.9% 11.6% 7.5%
data 12.4% 9.6% 13.5%
github 3.3% 4.4% 1.1%
code 3.6% 3.2% 3.3%
payment 8.5% 1.7% 8.6%
web 5.0% 2.4% 5.3%
email 2.5% 2.6% 2.7%
video 0.9% 2.6% 1.3%
llm 2.9% 1.5% 4.7%
crypto 4.8% 1.1% 3.9%
wallet 5.1% 0.9% 5.0%
image 1.7% 1.9% 1.1%
pdf 1.2% 1.6% 1.3%
analytics 0.9% 1.6% 1.1%
document 1.2% 1.4% 2.0%
security 2.3% 1.1% 2.6%
social 1.2% 1.4% 1.6%
news 1.4% 1.1% 1.3%
knowledge 0.4% 1.1% 2.2%

Largest gaps

  • payment: 8.6% of A2A agents, 1.7% of MCP servers
  • wallet: 5.1% of x402 APIs, 0.9% of MCP servers
Keyword match on name and description; one listing can count for several topics. Method JSON
10 · Growth

4,673 listings were first seen in the last 7 days.

Listings by the day any source first showed them to us, over the last 7 days. Our crawlers started at different dates, so early spikes partly reflect when a source was added.

x402 APIs

New in 7 days
872
Went down in 7 days
661
2026-11-05: 1562026-11-06: 982026-11-07: 1042026-11-08: 1132026-11-09: 2212026-11-10: 1422026-11-11: 38
2026-11-052026-11-11

MCP servers

New in 7 days
3,476
Went down in 7 days
453
2026-11-05: 5092026-11-06: 4322026-11-07: 4842026-11-08: 5282026-11-09: 8632026-11-10: 6602026-11-11: 0
2026-11-052026-11-11

A2A agents

New in 7 days
325
Went down in 7 days
85
2026-11-05: 1082026-11-06: 402026-11-07: 282026-11-08: 532026-11-09: 582026-11-10: 382026-11-11: 0
2026-11-052026-11-11
First-seen dates from listing sources. Method JSON
Scope & limits

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: 1,201 x402 APIs, 169 MCP servers, 55 A2A agents.

Growth. Earliest first-seen date across a listing's sources.

Reuse

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." 2026-11-11. https://agent-tools.cloud/stats

@misc{agenttools_stats_20261111,
  author = {agent-tools.cloud},
  title  = {The state of agent tools},
  year   = {2026},
  note   = {Snapshot 2026-11-11 06:00 UTC},
  url    = {https://agent-tools.cloud/stats}
}