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

Data & research

70 results

Most used Rising Most payers Newest Cheapest A–Z

P
Price Watcher APIData & research
Real-time product price lookup from a public e-commerce product URL. Use for product price checks, price monitoring, price comparison, shopping agents, ecommerce research, retail workflows, deal finding, and target-price tracking.
Basee-commerce-price-monitoring-production.up.railway.app
from $0.02
1 endpoint
3
2 payers
A
api.forum-labs.comData & research
Deep endpoint trust/QoS report for an x402 endpoint. Everything the trust score returns PLUS history detail: the full payment-terms drift log (including custody/payTo changes), the discovery/listing timeline across directories, the paid-delivery sample log, and a summarized counts-by-outcome breakdown with latency percentiles. Raw per-probe rows are never shipped. Use for auditing or investigating
Baseapi.forum-labs.com
from $0.02
1 endpoint
3
2 payers
S
ScreenSealData & research
ScreenSeal — sanctions screening: a name checked against the OFAC SDN and EU FSF lists. Informational signal, not legal advice.
Baseapi-1-screening.agent-tollbooth.workers.dev
from $0.02
1 endpoint
3
2 payers
FishPulseData & research
Fishing conditions scored 0-100 from live NOAA data (NWS forecast and pressure trend, CO-OPS tides and water temperature), with moon phase, solunar periods and species intel.
BaseSolanafishpulse.waltsoft.net
from $0.05
1 endpoint
2
2 payers
G
Global WeatherData & research
Dew point from air temperature and relative humidity in C and F, with a human comfort class and condensation hint.
BaseSolanaPolygon+1weather-global.x402tookit.com
from $0.02
1 endpoint
2
1 payers
S
Space WeatherData & research
Active sunspot regions on the Sun now: count, complex magnetic types that can flare, and recent flare counts.
BaseSolanaPolygon+1space-weather.x402tookit.com
from $0.02
1 endpoint
2
1 payers
S
selectarank-data.vercel.appData & research
ECB euro foreign exchange reference rates (units of currency per 1 EUR), daily, from the European Central Bank. Query: currencies=USD,JPY,GBP (default USD,JPY,GBP,CHF), days=1..30 (default 1). Facts only, no recommendations.
Baseselectarank-data.vercel.app
from $0.002
1 endpoint
1
1 payers
M
mcpfax-reliability.bowling-anthony.workers.devData & research
Observed change feed for listed x402 sellers: declared payTo changes with before/after values, other declared-terms changes (price, facilitator, fee payer), registry removals and returns, rating actions, and grade downgrades. Every response reports measured per-category coverage for the requested window.
Basemcpfax-reliability.bowling-anthony.workers.dev
from $0.005
1 endpoint
1
1 payers
A
api.datanexusai.orgData & research
Eurostat Comext trade facts (value and quantity).
BasePolygonArbitrumapi.datanexusai.org
from $0.01
3 endpoints
1
1 payers
A
api.cassia-data.comData & research
Premium CASSIA opportunity intelligence
Baseapi.cassia-data.com
from $0.01
1 endpoint
1
1 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.