x402 Checker (AI Nock)

https://x402-checker.nock-for-mak.workers.dev/report

● healthy model-context-protocol-mcp

Free check/board/name; paid bid/report 0.05, 1c fx/wx/lookups, news 0.001.

Paid verification

No sponsored paid call yet.

Pay this endpoint once from your own wallet (Base USDC, up to $1.00) and we call it and record what came back. Your wallet pays the listed recipient directly; Agent Tools never holds funds. Sponsored checks prove delivery; they do not count as demand.

Quality grade

How grading works

A 72.4 / 100

Availability 20.0 / 20

Endpoint responded (HTTP 200)

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 14.8 / 35

10 distinct payers, 228 USDC transfers in the last 30 days; discounted because most transfers come from few payers

Performance 10.0 / 10

Last probe answered in 181 ms (full marks at 200 ms or less)

Readiness 12.6 / 15

Agent readiness 84/100

Owner verified 0.0 / 5

Nobody has claimed this listing yet

Endpoint last checked 18 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

B · 84/100

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 A, 72.4/100), 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	20/25	Endpoint reachable; its 402 challenge was seen earlier (181 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	32/32 probes succeeded over 30 days (100%).
Resource declaration	8/10	41 paid resources; 1 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 (181 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 67% of peers; This listing 84 · peer median 78
Latency: Faster than 57% of peers; This listing 181 ms · peer median 205 ms

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

Live 402 challenge −5 — Answer the paid path with a valid 402 challenge.
Now: Endpoint reachable; its 402 challenge was seen earlier (181 ms).
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: 41 paid resources; 1 sampled lack a description.

How many agent tools actually work · All statistics

Paid endpoints

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

GET https://x402-checker.nock-for-mak.workers.dev/report $0.0500 / call

Paid x402 honesty report

POST https://x402-checker.nock-for-mak.workers.dev/check/batch $0.0100 / call

Paid batch x402 honesty probe (max 10 URLs)

GET https://x402-checker.nock-for-mak.workers.dev/who $0.0100 / call

Paid Base address lookup

GET https://x402-checker.nock-for-mak.workers.dev/md $0.0100 / call

Paid URL to markdown

GET https://x402-checker.nock-for-mak.workers.dev/headers $0.0100 / call

Paid raw HTTP header dump

GET https://x402-checker.nock-for-mak.workers.dev/json $0.0100 / call

Paid JSON Schema validator

GET https://x402-checker.nock-for-mak.workers.dev/sanctions $0.0100 / call

Paid OFAC SDN digital-currency screen

GET https://x402-checker.nock-for-mak.workers.dev/domain $0.0100 / call

Paid hostname dossier (DNS/RDAP/TLS/SPF/DMARC)

GET https://x402-checker.nock-for-mak.workers.dev/ssl $0.0100 / call

Paid TLS cert facts (CT + live HTTPS)

GET https://x402-checker.nock-for-mak.workers.dev/ens $0.0100 / call

Paid ENS / Basename resolver

GET https://x402-checker.nock-for-mak.workers.dev/redirect $0.0100 / call

Paid URL redirect tracer / unwrap

GET https://x402-checker.nock-for-mak.workers.dev/gas $0.0100 / call

Paid Base gas oracle

GET https://x402-checker.nock-for-mak.workers.dev/price $0.0100 / call

Paid spot USD price oracle

GET https://x402-checker.nock-for-mak.workers.dev/tx $0.0100 / call

Paid Base transaction lookup

GET https://x402-checker.nock-for-mak.workers.dev/block $0.0100 / call

Paid Base block header lookup

GET https://x402-checker.nock-for-mak.workers.dev/token $0.0100 / call

Paid Base ERC-20 token metadata

GET https://x402-checker.nock-for-mak.workers.dev/sig $0.0100 / call

Paid Ethereum function selector lookup

GET https://x402-checker.nock-for-mak.workers.dev/pm $0.0100 / call

Paid Polymarket odds lookup

GET https://x402-checker.nock-for-mak.workers.dev/fng $0.0100 / call

Paid Crypto Fear & Greed Index

GET https://x402-checker.nock-for-mak.workers.dev/tsec $0.0100 / call

Paid token security snapshot

GET https://x402-checker.nock-for-mak.workers.dev/dex $0.0100 / call

Paid DexScreener pairs lookup

GET https://x402-checker.nock-for-mak.workers.dev/now $0.0100 / call

Paid UTC clock (unix/iso)

GET https://x402-checker.nock-for-mak.workers.dev/find $0.0100 / call

Paid house catalog search

GET https://x402-checker.nock-for-mak.workers.dev/geo $0.0100 / call

Paid forward/reverse geocode

GET https://x402-checker.nock-for-mak.workers.dev/fx $0.0100 / call

Paid fiat FX (Frankfurter/ECB)

GET https://x402-checker.nock-for-mak.workers.dev/wx $0.0100 / call

Paid current weather (Open-Meteo)

GET https://x402-checker.nock-for-mak.workers.dev/quote $0.0100 / call

Paid stock/index/FX quote (Yahoo chart)

GET https://x402-checker.nock-for-mak.workers.dev/hn $0.0100 / call

Paid Hacker News search (Algolia)

GET https://x402-checker.nock-for-mak.workers.dev/arxiv $0.0100 / call

Paid arXiv paper search

GET https://x402-checker.nock-for-mak.workers.dev/so $0.0100 / call

Paid Stack Overflow search

GET https://x402-checker.nock-for-mak.workers.dev/cve $0.0100 / call

Paid CVE / NVD lookup

GET https://x402-checker.nock-for-mak.workers.dev/gh $0.0100 / call

Paid GitHub public lookup

GET https://x402-checker.nock-for-mak.workers.dev/wiki $0.0100 / call

Paid Wikipedia lead summary

GET https://x402-checker.nock-for-mak.workers.dev/email $0.0100 / call

Paid email syntax + MX check

GET https://x402-checker.nock-for-mak.workers.dev/bizdays $0.0100 / call

Paid US federal business-day calendar

GET https://x402-checker.nock-for-mak.workers.dev/tz $0.0100 / call

Paid IANA timezone clock

GET https://x402-checker.nock-for-mak.workers.dev/cron $0.0100 / call

Paid unix cron parser

GET https://x402-checker.nock-for-mak.workers.dev/crypto-news $0.0010 / call

Paid public crypto RSS recap

POST https://x402-checker.nock-for-mak.workers.dev/bid $0.0500 / call

Paid pay-to-rank board bid (adds to 24h total)

POST https://x402-checker.nock-for-mak.workers.dev/name $0.0500 / call

Paid ENS-style agent name register (30 day TTL)

https://x402-checker.nock-for-mak.workers.dev/mcp

How to call

cURL · x402-fetch / x402-axios will auto-handle 402

curl -sS -i -X GET https://x402-checker.nock-for-mak.workers.dev/report  # expect HTTP 402 Payment Required (about 0.001 USDC/call)

MCP endpoint

https://x402-checker.nock-for-mak.workers.dev/mcp

/.well-known/x402.json

https://x402-checker.nock-for-mak.workers.dev/.well-known/x402

Listed in

Directories this entry was found in.

mcp since 2026-08-20 x402scan since 2026-09-13 a2a since 2026-10-13