api.x402ai.dev

90.2 / 100 · rank 1729 of 2045

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

Availability87

Latency74

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 79 probes · single vantage
Median 402 handshake	607ms
p90 handshake	655ms
Catalog price (advertised)	$0.04
Live price (median demanded)	$0.04
Price status	match
Protocol	x402 v2
Category (our classification)	ai-services
Payment receiver	0xecE6…ae8b · stable since Jul 12
Base USDC settlement to this receiver wallet (30d' measured by us)	x402-plausible (amount matches a listed price): $0 · 5 transfers · 3 distinct senders. All USDC inflow' upper bound incl. non-x402: $0 · 5 transfers.
Discovery (.well-known/x402)	present
Catalog volume (their metric)	2 calls/30d

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

/api/embed	$0.01	$0.01 (matches)
/api/summarize	$0.02	$0.02 (matches)
/api/ask	$0.04	not yet probed

grade evidence: hourly probes of /api/ask. 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 3 listed) · unverified · not part of the rating

Single-turn question answering from a small local LLM (qwen3.5 2B). Best for general knowledge, definitions and simple reasoning. POST JSON {"input": string}, up to 3000 characters; returns {answer, model, elapsed_ms}. Answers are brief (2-3 sentences). …

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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, from a single network vantage for this service.

Operator of api.x402ai.dev? Dispute this rating. Scores are opinions based on automated measurements at the stated times.