combinatorics.openverbs.com
5 listed endpoints · free reliability snapshot (may be up to 24h old)
Base
B 5
endpoints
5
avg trust score
72.3
ecosystem avg 52.0
avg 30-day uptime
90.8%
ecosystem avg 53.6%
avg latency (EU)
867 ms
measured from a single EU vantage point; includes network round-trip distance to the endpoint
price band
$0.004
USDC per call
networks
1
At a glance
combinatorics.openverbs.com operates 5 listed x402 endpoints across 1 network. 5 of them carry a computed trust score, averaging 72.3 of 100 (above the ecosystem average of 52.0). Average 30-day uptime across the measured endpoints is 90.8% (above the ecosystem average of 53.6%). Advertised price: $0.004 USDC per call. Best-scored endpoint: Catalan number (grade B, 72.4).
Top endpoints by trust score
- Catalan number/v1/catalanThe n-th Catalan number Cₙ = C(2n, n)/(n+1), counting balanced bracketings, binary trees, and many other structures. Requires n ≤ 10000.→
- Permutations (nPr)/v1/permutationsNumber of ordered arrangements of r items from n, nPr = n!/(n-r)!. Requires r ≤ n and r ≤ 10000.→
- Factorial/v1/factorialExact factorial n! for 0 ≤ n ≤ 20000, returned as a decimal string with its digit count.→
- Multinomial coefficient/v1/multinomialMultinomial coefficient (k1+k2+…)! / (k1! k2! …) — the number of ways to partition n = Σki items into labelled groups of the given sizes. The sum must be ≤ 2…→
- Combinations (nCr)/v1/combinationsBinomial coefficient nCr = n!/(r!(n-r)!), the number of unordered r-subsets of n. Requires r ≤ n and min(r, n-r) ≤ 10000.→
All endpoints
| endpoint▼ | grade▼ | uptime 30d▼ | conf.▼ | price▼ |
|---|---|---|---|---|
| /v1/catalan Catalan number | B 72.4 | 90.9% | 0.93 | $0.004 |
| /v1/multinomial Multinomial coefficient | B 72.2 | 90.3% | 0.93 | $0.004 |
| /v1/combinations Combinations (nCr) | B 72.1 | 90.9% | 0.93 | $0.004 |
| /v1/permutations Permutations (nPr) | B 72.3 | 90.9% | 0.93 | $0.004 |
| /v1/factorial Factorial | B 72.3 | 90.9% | 0.93 | $0.004 |
Scores use reduced-density sampling; live probe, full 30-min density and 90-day history via the paid API. Provider-supplied names and descriptions are unverified claims; the grades are our independent measurement.