Discover / stats.openverbs.com

Descriptive summary

■ Challenge detected

Full descriptive summary of a numeric sample: count, sum, min/max/range, mean, median, mode(s), variance, standard deviation and the quartiles (q1/q3/iqr). Set sample=true for the sample variance/stdev (÷ n-1) instead of the population form (÷ n).

x402
Base
USDC

Listed price: $0.004
Challenge detected: 10 of the last 10 checks
Median response: 179 ms
Last checked: 17 Oct, 09:26 UTC
In our index since: 26 Sept 2026

Endpoint

curl -i https://stats.openverbs.com/v1/summary
# 402 Payment Required: pay with an x402 client (USDC on Base),
# then send the same request again with the payment attached.

4 listed endpoints · on x402 Bazaar

Checks and payment terms on this page refer to the endpoint above. Other listed endpoints have not been checked individually.

Base URLhttps://stats.openverbs.com/v1

POST/correlation$0.004Pearson correlation coefficient and covariance of two equal-length paired series. Rejected as a clean 400 if the lengths differ or either series has zero variance (correlation undefined).
POST/summary$0.004Full descriptive summary of a numeric sample: count, sum, min/max/range, mean, median, mode(s), variance, standard deviation and the quartiles (q1/q3/iqr). Set sample=true for the sample variance/stdev (÷ n-1) instead of the population form (÷ n).
POST/percentile$0.004Evaluate one or more percentiles (0–100) of a numeric sample using linear interpolation between order statistics (the R-7 / Excel PERCENTILE.INC method). 50 is the median, 25/75 the quartiles.
POST/regression$0.004Ordinary-least-squares linear regression of y on x: slope, intercept, correlation r and coefficient of determination r². Pass predictAt to also evaluate the fitted line at a given x. Rejected as a clean 400 if lengths differ or x has zero variance.

A dash means the listing gives no price or method. Copy buttons copy the full URL.

Showing 4 of 4 listed endpoints.

Agents can find it through the Superstables MCP server and JSON API: GET /api/v1/services/stats.openverbs.com

Recent checks

30 Sept 2026One bar per check, showing up to 20 recent checks. Coloured bars show relative response time, with a minimum visible height; full-height grey bars mean no challenge was detected. “Challenge detected” means HTTP 402 or another detected payment-challenge signal.17 Oct 2026

All 10 checks

When (UTC)	Result	HTTP	Response
17 Oct, 09:26 UTC	Challenge detected	402	429ms
16 Oct, 11:31 UTC	Challenge detected	402	186ms
14 Oct, 23:56 UTC	Challenge detected	402	166ms
13 Oct, 20:45 UTC	Challenge detected	402	168ms
11 Oct, 19:34 UTC	Challenge detected	402	237ms
10 Oct, 03:32 UTC	Challenge detected	402	177ms
9 Oct, 00:47 UTC	Challenge detected	402	230ms
7 Oct, 21:31 UTC	Challenge detected	402	181ms
6 Oct, 18:37 UTC	Challenge detected	402	176ms
30 Sept, 17:04 UTC	Challenge detected	402	177ms

Questions

Did our last probe detect a payment challenge?

At our last probe on 17 Oct, 09:26 UTC, it returned HTTP 402 or another detected payment-challenge signal. This check did not test payment, delivery or compatibility with the Superstables client.

What price is recorded for Descriptive summary?

Its listed price is $0.004.

What payment terms does Descriptive summary advertise?

The listing advertises x402, Base and USDC. It names cdp as its facilitator. Check the seller's current payment challenge and authentication requirements before paying.

Where is Descriptive summary listed?

In x402 Bazaar. Superstables first indexed it on 26 Sept 2026.

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