Signed timestamps & hash receipts

Signed time and hash receipts for agents. GET /time returns the current UTC time signed by the genexxis notary key; POST /stamp takes a SHA-256 hash (+ optional label) and returns a signed receipt (id, timestamp, message, EIP-191 signature) stored for lookup. This is a server-signed timestamp: proof that the hash existed at that time according to this service (NTP-synced clock), not an on-chain anchor. Verification is free (POST /verify, GET /receipt) and also works offline with any Ethereum personal_sign verifier against signer 0x02A5A59fdC30Ec50c091F7EE1486D08B49F56940.

Paid verification

How it works

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

B 60.1 / 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 5.1 / 35

18 distinct payers, 580 USDC transfers in the last 30 days; the wallet is shared by 30 listings, so each is credited 1/30; discounted because most transfers come from few payers

Performance 7.9 / 10

Last probe answered in 571 ms (full marks at 200 ms or less)

Readiness 12.0 / 15

Agent readiness 80/100

Owner verified 0.0 / 5

Nobody has claimed this listing yet

Endpoint last checked 17 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 · 80/100

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, 60.1/100), 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 (571 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	11/11 probes succeeded over 30 days (100%).
Resource declaration	5/10	Declares 2 paid resource(s).
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 (571 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, bazaar_feed, 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 55% of peers; This listing 80 · peer median 78
Latency: Faster than 14% of peers; This listing 571 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 (571 ms).
Resource declaration −5 — Declare each paid resource with its input and output schema.
Now: Declares 2 paid resource(s).
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.

How many agent tools actually work · All statistics

Paid endpoints

2 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://notary.genexxis.com/time

https://notary.genexxis.com/stamp

How to call

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

curl -sS -i -X GET https://notary.genexxis.com/time  # expect HTTP 402 Payment Required (about 0.003 USDC/call)

/.well-known/x402.json

https://notary.genexxis.com/.well-known/x402

Listed in

Directories this entry was found in.

cdp-bazaar since 2026-10-25 x402scan since 2026-10-25 a2a since 2026-11-01 x402 since 2026-11-01