X402/REGISTERas of 07-21 10:47 UTC

api.postagent.sh

90.3 / 100 · rank 1155 of 1511

last 120 hours · short tick = valid 402 · full tick = invalid or no answer · faint = not probed

score components (0-100) · not the raw measurements below

Availability93

Latency56

Price integrity100

Protocol100

Consistency100

Availability is the one component that is a success rate, so it alone carries an evidence discount: it enters as the 95% Wilson lower bound of the measured share (cubed), which is why its bar reads below the raw percentage above — thin evidence scores below a long proven record. Latency, price, protocol and consistency are direct measurements, shown as-is.

Availability (valid 402 returned)	100.0% of 160 probes
Median 402 handshake	1158ms
p90 handshake	1338ms
Catalog price (advertised)	$1.23
Live price (median demanded)	$1.24
Price status	match
Protocol	x402 v2
Category (our classification)	agent-tools
Payment receiver	0x4ecc…007F · stable since Jul 12
Base USDC settlement to this receiver wallet (30d' measured by us)	x402-plausible (amount matches a listed price): $0 · 0 transfers · 1 distinct senders. All USDC inflow' upper bound incl. non-x402: $23 · 2 transfers.
Second vantage	confirmed 402 from a second network path (Cloudflare edge), 1h ago
Discovery (.well-known/x402)	not found
Catalog volume (their metric)	2 calls/30d

event log (from our catalog snapshots and probes)

2026-07-16 03:21

price changed $1.23 → $1.24

Seller-provided description · unverified · not part of the rating

Print and mail physical US letters (PDF, HTML, Markdown, DOCX, or image) and postcards via USPS, paid in USDC — with certified/registered proof options and standalone address verification at POST /v1/verify. Integration flow: POST /v1/documents to upload, …

Embed this grade (free, always current)

<a href="https://x402register.com/s/api.postagent.sh.html"><img src="https://x402register.com/badge/api.postagent.sh.svg" alt="x402 register grade A"></a>

What this grade does and doesn't measure: it scores the paid-request handshake — whether the service returns a spec-valid 402 payment challenge, how fast, and whether its price is honest. We do not pay these endpoints yet, so we do not verify that the paid response returns correct or complete content. Availability is a probe success rate measured hourly, corroborated by a second network path for this service.

Operator of api.postagent.sh? Dispute this rating. Scores are opinions based on automated measurements at the stated times.