X402/REGISTERas of 07-21 11:47 UTC

paulgraham.persona.energy

93.1 / 100 · rank 912 of 1519

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

Latency75

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	597ms
p90 handshake	640ms
Catalog price (advertised)	$0.01
Live price (median demanded)	$0.01
Price status	match
Protocol	x402 v2
Category (our classification)	data-intel
Payment receiver	0x45A4…7D96 · stable since Jul 12
Base USDC inflow to this receiver wallet (30d, all sources — not just x402)	shared receiver wallet — total inflow is not attributable to this domain alone
Second vantage	confirmed 402 from a second network path (Cloudflare edge), 3h ago
Discovery (.well-known/x402)	not found
Catalog volume (their metric)	2 calls/30d

listed products (catalog path · advertised price · live price we measured)

/v1/x402/entities/paul-graham/chat	$0.25	$0.25 (matches)
/v1/x402/entities/paul-graham/retrieve	$0.01	not yet probed

grade evidence: hourly probes of /v1/x402/entities/paul-graham/retrieve. Availability, latency and protocol measure the operator's shared infrastructure and generalize across its products; the price check applies to the probed product. We now also probe one other product per hour, rotating; "live price we measured" shows what each answered.

Seller description of the probed product (one of 2 listed) · unverified · not part of the rating

Search Paul Graham's source corpus — a source-grounded persona of the Y Combinator co-founder and essayist, built from 13,000+ cited sources: his complete essays, talks, interviews, and X posts — by semantic + lexical query and retrieve grounded packets …

Embed this grade (free, always current)

<a href="https://x402register.com/s/paulgraham.persona.energy.html"><img src="https://x402register.com/badge/paulgraham.persona.energy.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 paulgraham.persona.energy? Dispute this rating. Scores are opinions based on automated measurements at the stated times.