X402/REGISTERas of 07-21 10:47 UTC

api.predictionmarketdata.io

96.9 / 100 · rank 25 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

Latency100

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	98ms
p90 handshake	228ms
Catalog price (advertised)	$0.005
Live price (median demanded)	$0.005
Price status	match
Protocol	x402 v2
Category (our classification)	finance-crypto
Payment receiver	0x995c…781f · stable since Jul 12
Base USDC settlement to this receiver wallet (30d' measured by us)	x402-plausible (amount matches a listed price): $0 · 100 transfers · 12 distinct senders. All USDC inflow' upper bound incl. non-x402: $0 · 100 transfers.
Second vantage	confirmed 402 from a second network path (Cloudflare edge), just now
Discovery (.well-known/x402)	not found
Catalog volume (their metric)	24 calls/30d

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

/market-news	$0.001	$0.001 (matches)
/market-statistics/sectors	$0.001	$0.001 (matches)
/prediction-markets	$0.001	$0.001 (matches)
/prediction-total-volume	$0.001	$0.001 (matches)
/open-interest	$0.001	not yet probed
/prediction-markets/similar	$0.005	not yet probed

grade evidence: hourly probes of /prediction-markets/similar. 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 6 listed) · unverified · not part of the rating

Find semantically similar prediction markets given an event_ticker.

Embed this grade (free, always current)

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