Explore APIs

Every pay-per-call x402 API we can find, ranked by what agents actually pay for. No accounts, no API keys.

Projects: 4.4K
Paid endpoints: 87K
Paid calls · 30 days: 885K
Launched here: 0

Developer tools

7 results

Most used Rising Most payers Newest Cheapest A–Z

T
Tech DetectDeveloper tools
One HTTP request per host, matched against an in-house signature set. Every hit carries a confidence value from 0 to 100 and the evidence it rests on: response header, asset path, cookie name, meta generator, DNS or ASN record. Results are cached for 24 hours per host, so a repeat lookup of the same domain answers from cache.
Basestack.halowerk.com
from $0.005
106 endpoints
326
216 payers
F
ForeverKaratDeveloper tools
One-day API key for a weather data API. A test product on the Agentify test channel; nothing real is delivered.
Base Sepoliatest.agentify.ad
from $0.01
16 endpoints
102
16 payers
D
dns-intel-api-production.up.railway.appDeveloper tools
Reverse-DNS lookup for an IP: PTR record plus a best-effort list of other domains hosted on the same IP.
Basedns-intel-api-production.up.railway.app
from $0.002
2 endpoints
41
9 payers
M
MysticAPIDeveloper tools
Live universal sky snapshot, no inputs: geocentric ecliptic longitudes for 13 bodies (Sun through Pluto, Chiron, lunar nodes) with zodiac sign/degree and 64-gate wheel placements, current moon phase and illumination, active retrogrades, and a 30-day almanac of upcoming stations and lunations. JPL-validated ephemeris. JSON. $0.01 USDC via x402, or API key.
BaseSolanamysticapi.com
from $0.01
1 endpoint
18
7 payers
X
x402-v2-mint-domain-intel.vercel.appDeveloper tools
DNS + WHOIS/RDAP + TLS composite for one domain. Settles only if ≥1 facet non-empty; else charged:false. Reuses dns-lookup / whois-rdap / ssl-cert-check helpers.
Basex402-v2-mint-domain-intel.vercel.app
from $0.005
1 endpoint
9
6 payers
M
Moon phaseDeveloper tools
Compute the Moon's phase name, age in days since the last new moon and illuminated fraction (0..1) for a UTC date/time. Uses the mean synodic month (29.53 days).
Baseastro.openverbs.com
from $0.004
3 endpoints
8
7 payers
X
x402-v2-mint-case-codec.vercel.appDeveloper tools
Convert strings between camel/snake/kebab/Pascal/CONSTANT/Title (batch ≤50). Offline native.
Basex402-v2-mint-case-codec.vercel.app
from $0.003
1 endpoint
7
6 payers

Service data comes from the Coinbase CDP and PayAI discovery lists and refreshes every few hours. Usage is paid calls over the last 30 days. APIs launched here are verified by us; the rest are paid directly to their owners.