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YourAITools: the opposite marketplace for AI agent tools (x402)

https://api.youraitools.co/agentgate/v1/check-agent
● healthy ai

313+ AI tools and APIs you pay per call in USDC over x402: paid straight to builders, no signup, public numbers, never ranked by payment.

Category
ai
Chains
base, eip155:137, eip155:42161, eip155:8453, solana, solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp
Price
$0.0010–$49.0000 USDC

Quality grade

How grading works
B+ 66.0 / 100
Availability 20.0 / 20
Endpoint responded (HTTP 402)
Payability 15.0 / 15
  • ✓ Answers a real HTTP 402 challenge
  • ✓ Publishes a /.well-known/x402 descriptor
  • ✓ Payment address on record
  • ✓ Settlement network declared
  • ✓ Price declared
Demand 7.8 / 35
37 distinct payers, 703 USDC transfers in the last 30 days; the wallet is shared by 22 listings, so each is credited 1/22
Performance 9.6 / 10
Last probe answered in 266 ms (full marks at 200 ms or less)
Readiness 13.6 / 15
Agent readiness 91/100
Owner verified 0.0 / 5
Nobody has claimed this listing yet
Endpoint last checked 19 h ago. On-chain activity last read 3 d ago. Availability and on-chain demand are both re-probed daily; the grade updates automatically on the next pass. This grade sets search order and leaderboards; the readiness score below is shown for reference only.

x402 readiness

A · 91/100

Readiness is how fully this listing follows its protocol and how it behaved in our probes over 30 days. It is shown for reference and does not move it in search. Search order and leaderboards use the separate quality grade (here B+, 66.0/100), which weighs availability, payability and on-chain demand. How the two differ

Valid payment requirements 10/10 Payment requirements carry a payee, a mainnet network and a price.
Live 402 challenge 25/25 Paid endpoint answers with an HTTP 402 challenge (266 ms).
x402 version n/a x402 version not observed yet.
Signed descriptor n/a No x402 standard defines a signed descriptor.
Uptime (30 days) 15/15 23/23 probes succeeded over 30 days (100%).
Resource declaration 8/10 68 paid resources; 50 sampled lack a description.
Verified identity 5/10 Publisher descriptor (/.well-known/x402 or OpenAPI) on record; claim this listing to verify domain control.
Freshness + modern flags 5/5 seen in a source within 7 days; declares x402.
Security declaration n/a Payment is the access control for an x402 resource.
Applicable criteria total 75 points, scaled to 100.
Responsiveness: Responsive (266 ms; bands ≤2.5 s, ≤5 s, ≤8 s, slower; penalty only).
Payment evidence: x402_challenge — We sent a request and got a live HTTP 402 challenge. Also: x402_manifest, catalog_listing. Qualifies the payment claim; adds no points.
Measured 2026-11-11.
Nine criteria, the same as the A2A readiness score, read from our daily probe of the paid endpoint, its payment requirements and 30-day probe history. Signed descriptor and security declaration are n/a for x402 (payment is the access control), as is an x402 version we have not observed; the remaining points are scaled to 100. Grades: A>=90, B>=75, C>=60, D>=40, F<40. It also feeds 15 points of the x402 quality grade.

Compared with peers

Against 10,082 reachable x402 APIs in our daily snapshot (2026-11-12 06:46 UTC). Display only; it does not change search order.

Readiness
Higher than 90% of peers
This listing 91 · peer median 78
Latency
Faster than 40% of peers
This listing 266 ms · peer median 205 ms

Where it loses the most points, and how to win them back

  • Verified identity −5 — Claim the listing and prove control of its domain.
    Now: Publisher descriptor (/.well-known/x402 or OpenAPI) on record; claim this listing to verify domain control.
  • Resource declaration −2 — Declare each paid resource with its input and output schema.
    Now: 68 paid resources; 50 sampled lack a description.

How many agent tools actually work · All statistics

Paid endpoints

68 resource(s) advertised by this origin. Each price below is that resource's own x402 price; the headline price is the range across them.

https://api.youraitools.co/agentgate/v1/check-agent
https://api.youraitools.co/webread/v1/read
https://api.youraitools.co/webread/v1/lite
https://api.youraitools.co/injectscan/v1/scan
https://api.youraitools.co/domaincheck/v1/domain
https://api.youraitools.co/domaincheck/v1/email
https://api.youraitools.co/payguard/v1/address
https://api.youraitools.co/payguard/v1/batch
https://api.youraitools.co/pkgguard/v1/scan
https://api.youraitools.co/pkgguard/v1/package
https://api.youraitools.co/stackdetect/v1/detect
https://api.youraitools.co/tokenverdict/v1/lite
https://api.youraitools.co/tokenverdict/v1/quick
https://api.youraitools.co/tokenverdict/v1/deep
https://api.youraitools.co/tokenverdict/v1/verdict
https://api.youraitools.co/tokenverdict/v1/batch
https://api.youraitools.co/signcheck/v1/check
https://api.youraitools.co/signcheck/v1/lite
https://api.youraitools.co/counterpartycheck/v1/lite
https://api.youraitools.co/counterpartycheck/v1/quick
https://api.youraitools.co/counterpartycheck/v1/full
https://api.youraitools.co/x402fix/v1/lite
https://api.youraitools.co/x402fix/v1/check
https://api.youraitools.co/x402fix/v1/site
https://api.youraitools.co/solverdict/v1/lite
https://api.youraitools.co/solverdict/v1/check
https://api.youraitools.co/agentready/v1/lite
https://api.youraitools.co/agentready/v1/audit
https://api.youraitools.co/perpradar/v1/lite
https://api.youraitools.co/perpradar/v1/full
https://api.youraitools.co/perpradar/v1/scan
https://api.youraitools.co/perpradar/v1/funding
https://api.youraitools.co/tasignal/v1/lite
https://api.youraitools.co/tasignal/v1/risk
https://api.youraitools.co/tasignal/v1/backtest
https://api.youraitools.co/leakguard/v1/lite
https://api.youraitools.co/leakguard/v1/scan
https://api.youraitools.co/smartperps/v1/lite
https://api.youraitools.co/smartperps/v1/coin
https://api.youraitools.co/smartperps/v1/scan
https://api.youraitools.co/smartperps/v1/wallet
https://api.youraitools.co/toolpick/v1/lite
https://api.youraitools.co/toolpick/v1/pick
https://api.youraitools.co/toolpick/v1/market
https://api.youraitools.co/perpcheck/v1/lite
https://api.youraitools.co/perpcheck/v1/full
https://api.youraitools.co/toolfit/v1/lite
https://api.youraitools.co/toolfit/v1/full
https://api.youraitools.co/toolfit/v1/diff
https://api.youraitools.co/toolfit/v1/check

How to call

cURL · x402-fetch / x402-axios will auto-handle 402
curl -sS -i -X GET https://api.youraitools.co/agentgate/v1/check-agent  # expect HTTP 402 Payment Required (about $0.001/call)
/.well-known/x402.json
https://api.youraitools.co/.well-known/x402

Listed in

Directories this entry was found in.

x402scan since 2026-10-22 mcp since 2026-10-22 x402 since 2026-10-22 submission since 2026-10-25 a2a since 2026-11-11