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Web standards and time reference for AI agents: HTTP status codes with what the client should do, retry semantics, MIME types and content-type matching, request-method safety and idempotency, plus deadline arithmetic - time until a moment, weekday and business-day checks, duration conversion and Unix timestamps. Pay per call in USDC on Base via x402 or USDC on Tempo via MPP. No signup, no API k...
Category
search
Chains
base, eip155:8453
Price
$0.0030–$0.0050 USDC
Quality grade
How grading works
C+
60.0 / 100
Availability
40.0 / 40
Endpoint responded (HTTP 402)
Payability
20.0 / 20
- ✓ Answers a real HTTP 402 challenge
- ✓ Publishes a /.well-known/x402 descriptor
- ✓ Payment address on record
- ✓ Settlement network declared
- ✓ Price declared
Demand
0.0 / 40
0 distinct payers, 0 USDC transfers in the last 30 days
Owner verified
0.0 / 3
Nobody has claimed this listing yet
Endpoint last checked 17 h ago.
On-chain activity last read 16 h ago.
Availability and on-chain demand are both re-probed daily; the grade
updates automatically on the next pass.
Paid endpoints
14 resource(s) advertised by this origin.
https://webref.johnaio281.workers.dev/api/time/add_duration
https://webref.johnaio281.workers.dev/api/time/business_days_between
https://webref.johnaio281.workers.dev/api/time/convert_duration
https://webref.johnaio281.workers.dev/api/time/describe_instant
https://webref.johnaio281.workers.dev/api/time/time_until
https://webref.johnaio281.workers.dev/api/time/unix_time
https://webref.johnaio281.workers.dev/api/time/weekday_of
https://webref.johnaio281.workers.dev/api/web/content_type_advice
https://webref.johnaio281.workers.dev/api/web/http_method
https://webref.johnaio281.workers.dev/api/web/http_status
https://webref.johnaio281.workers.dev/api/web/list_mime_types
https://webref.johnaio281.workers.dev/api/web/mime_type
https://webref.johnaio281.workers.dev/api/web/retry_advice
https://webref.johnaio281.workers.dev/api/web/status_for_situation
How to call
cURL · x402-fetch / x402-axios will auto-handle 402
curl -sS -i -X GET https://webref.johnaio281.workers.dev/api/time/add_duration # expect HTTP 402 Payment Required (about $0.003/call)/.well-known/x402.json
https://webref.johnaio281.workers.dev/.well-known/x402
Listed in
Directories this entry was found in.
x402scan