{
 "host": "combinatorics.openverbs.com",
 "slug": "combinatorics.openverbs.com",
 "resources": 5,
 "probed": 0,
 "live": 0,
 "dead": 0,
 "templated": 0,
 "verdict": "unverified",
 "statuses": {
  "unprobed": 5
 },
 "methods": {
  "POST": 5
 },
 "networks": {
  "base": 5
 },
 "testnet_only": false,
 "catalogs": {
  "cdp": 5
 },
 "categories": {
  "other/unknown": 4,
  "chain-rpc": 1
 },
 "price_min": 0.004,
 "price_max": 0.004,
 "price_median": 0.004,
 "payTos": [
  "0xb3f4de103F34b99f0Da19B4F16D6B53a14C2194A"
 ],
 "shared_payto_hosts": [
  "airport.openverbs.com",
  "astro.openverbs.com",
  "bitwise.openverbs.com",
  "braille.openverbs.com",
  "chain.openverbs.com",
  "checkdigit.openverbs.com",
  "checksum.openverbs.com",
  "chem.openverbs.com",
  "chemeq.openverbs.com",
  "color.openverbs.com",
  "creditcard.openverbs.com",
  "crypto.openverbs.com"
 ],
 "shared_payto_hosts_count": 90,
 "onchain": {
  "resolved": true,
  "payTos_resolved": 1,
  "payTos_total": 1,
  "payers": 5,
  "payments": 197,
  "usd": 1.353,
  "first": "2026-09-09T06:14:21.000000Z",
  "last": "2026-09-30T21:31:07.000000Z",
  "sampler_share": 1,
  "sources": [
   "forensics-2026-09-30"
  ],
  "note": "the payTo also receives for 90 other hosts; on-chain totals are per address, not per host"
 },
 "files": null,
 "files_checked_at": null,
 "first_seen_catalog": "2026-09-06T08:14:24.823Z",
 "last_updated_catalog": "2026-09-14T19:59:41.654Z",
 "cdp_quality": {
  "calls30": 16,
  "payers30": 6,
  "rows": 5,
  "note": "CDP catalog's own 30-day counters, summed over rows; catalog-reported, not settlement"
 },
 "curated": 0,
 "is_us": false,
 "resources_list": [
  {
   "id": "0e1fc60f2af5",
   "url": "https://combinatorics.openverbs.com/v1/catalan",
   "method": "POST",
   "price_usd": 0.004,
   "net": "base",
   "status": "unprobed",
   "valid_402": false,
   "description": "The n-th Catalan number Cₙ = C(2n, n)/(n+1), counting balanced bracketings, binary trees, and many o",
   "catalogs": [
    "cdp"
   ],
   "payers": 5,
   "first_seen_catalog": "2026-09-14T19:59:41.654Z",
   "last_updated_catalog": "2026-09-14T19:59:41.654Z"
  },
  {
   "id": "8f44f6b5fdaf",
   "url": "https://combinatorics.openverbs.com/v1/multinomial",
   "method": "POST",
   "price_usd": 0.004,
   "net": "base",
   "status": "unprobed",
   "valid_402": false,
   "description": "Multinomial coefficient (k1+k2+…)! / (k1! k2! …) — the number of ways to partition n = Σki items int",
   "catalogs": [
    "cdp"
   ],
   "payers": 5,
   "first_seen_catalog": "2026-09-06T08:14:31.042Z",
   "last_updated_catalog": "2026-09-06T08:14:31.042Z"
  },
  {
   "id": "d8af2e36f072",
   "url": "https://combinatorics.openverbs.com/v1/combinations",
   "method": "POST",
   "price_usd": 0.004,
   "net": "base",
   "status": "unprobed",
   "valid_402": false,
   "description": "Binomial coefficient nCr = n!/(r!(n-r)!), the number of unordered r-subsets of n. Requires r ≤ n and",
   "catalogs": [
    "cdp"
   ],
   "payers": 5,
   "first_seen_catalog": "2026-09-06T08:14:28.928Z",
   "last_updated_catalog": "2026-09-06T08:14:28.928Z"
  },
  {
   "id": "685f327851f2",
   "url": "https://combinatorics.openverbs.com/v1/permutations",
   "method": "POST",
   "price_usd": 0.004,
   "net": "base",
   "status": "unprobed",
   "valid_402": false,
   "description": "Number of ordered arrangements of r items from n, nPr = n!/(n-r)!. Requires r ≤ n and r ≤ 10000.",
   "catalogs": [
    "cdp"
   ],
   "payers": 5,
   "first_seen_catalog": "2026-09-06T08:14:26.836Z",
   "last_updated_catalog": "2026-09-06T08:14:26.836Z"
  },
  {
   "id": "5e61c7489fd7",
   "url": "https://combinatorics.openverbs.com/v1/factorial",
   "method": "POST",
   "price_usd": 0.004,
   "net": "base",
   "status": "unprobed",
   "valid_402": false,
   "description": "Exact factorial n! for 0 ≤ n ≤ 20000, returned as a decimal string with its digit count.",
   "catalogs": [
    "cdp"
   ],
   "payers": 5,
   "first_seen_catalog": "2026-09-06T08:14:24.823Z",
   "last_updated_catalog": "2026-09-06T08:14:24.823Z"
  }
 ],
 "live_reprobes": {
  "8f44f6b5fdaf": {
   "at": "2026-10-01T02:13:18.000Z",
   "head_status": 402,
   "get_status": 402,
   "is_402": true,
   "status": "live",
   "dead": false,
   "valid_402": true,
   "body_json": true,
   "has_accepts": true,
   "accepts_count": 1,
   "accepts0": {
    "scheme": "exact",
    "network": "eip155:8453",
    "amount": "4000",
    "payTo": "0xb3f4de103F34b99f0Da19B4F16D6B53a14C2194A",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "maxTimeoutSeconds": 300,
    "extra": {
     "name": "USD Coin",
     "version": "2"
    }
   },
   "price_matches_catalog": true,
   "payto_matches_catalog": null,
   "x402Version": 2,
   "has_bazaar_ext": true,
   "has_payment_required_header": true,
   "mpp_header": "Payment id=\"u1EElS96_yKQjkSDrT6AMT0BQeUB",
   "channel": "header",
   "content_type": "application/problem+json",
   "latency_ms": 4125,
   "error": null,
   "error_text": "Payment is required (Multinomial coefficient (k1+k2+…)! / (k1! k2! …) — the number of ways to partition n = Σki items in",
   "id": "8f44f6b5fdaf",
   "url": "https://combinatorics.openverbs.com/v1/multinomial",
   "via": "cron",
   "prev_status": "unprobed",
   "census_status": "unprobed",
   "changed": true
  },
  "d8af2e36f072": {
   "at": "2026-10-01T02:13:18.000Z",
   "head_status": 402,
   "get_status": 402,
   "is_402": true,
   "status": "live",
   "dead": false,
   "valid_402": true,
   "body_json": true,
   "has_accepts": true,
   "accepts_count": 1,
   "accepts0": {
    "scheme": "exact",
    "network": "eip155:8453",
    "amount": "4000",
    "payTo": "0xb3f4de103F34b99f0Da19B4F16D6B53a14C2194A",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "maxTimeoutSeconds": 300,
    "extra": {
     "name": "USD Coin",
     "version": "2"
    }
   },
   "price_matches_catalog": true,
   "payto_matches_catalog": null,
   "x402Version": 2,
   "has_bazaar_ext": true,
   "has_payment_required_header": true,
   "mpp_header": "Payment id=\"gU5GqWlQ90v3Y5Z2IBPdsMetbN2J",
   "channel": "header",
   "content_type": "application/problem+json",
   "latency_ms": 4117,
   "error": null,
   "error_text": "Payment is required (Binomial coefficient nCr = n!/(r!(n-r)!), the number of unordered r-subsets of n. Requires r ≤ n an",
   "id": "d8af2e36f072",
   "url": "https://combinatorics.openverbs.com/v1/combinations",
   "via": "cron",
   "prev_status": "unprobed",
   "census_status": "unprobed",
   "changed": true
  },
  "685f327851f2": {
   "at": "2026-10-01T02:13:18.000Z",
   "head_status": 402,
   "get_status": 402,
   "is_402": true,
   "status": "live",
   "dead": false,
   "valid_402": true,
   "body_json": true,
   "has_accepts": true,
   "accepts_count": 1,
   "accepts0": {
    "scheme": "exact",
    "network": "eip155:8453",
    "amount": "4000",
    "payTo": "0xb3f4de103F34b99f0Da19B4F16D6B53a14C2194A",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "maxTimeoutSeconds": 300,
    "extra": {
     "name": "USD Coin",
     "version": "2"
    }
   },
   "price_matches_catalog": true,
   "payto_matches_catalog": null,
   "x402Version": 2,
   "has_bazaar_ext": true,
   "has_payment_required_header": true,
   "mpp_header": "Payment id=\"38IfMwa0D5Us7-qF5wwgQF5Ce6YQ",
   "channel": "header",
   "content_type": "application/problem+json",
   "latency_ms": 3926,
   "error": null,
   "error_text": "Payment is required (Number of ordered arrangements of r items from n, nPr = n!/(n-r)!. Requires r ≤ n and r ≤ 10000.).",
   "id": "685f327851f2",
   "url": "https://combinatorics.openverbs.com/v1/permutations",
   "via": "cron",
   "prev_status": "unprobed",
   "census_status": "unprobed",
   "changed": true
  },
  "5e61c7489fd7": {
   "at": "2026-10-01T02:13:18.000Z",
   "head_status": 402,
   "get_status": 402,
   "is_402": true,
   "status": "live",
   "dead": false,
   "valid_402": true,
   "body_json": true,
   "has_accepts": true,
   "accepts_count": 1,
   "accepts0": {
    "scheme": "exact",
    "network": "eip155:8453",
    "amount": "4000",
    "payTo": "0xb3f4de103F34b99f0Da19B4F16D6B53a14C2194A",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "maxTimeoutSeconds": 300,
    "extra": {
     "name": "USD Coin",
     "version": "2"
    }
   },
   "price_matches_catalog": true,
   "payto_matches_catalog": null,
   "x402Version": 2,
   "has_bazaar_ext": true,
   "has_payment_required_header": true,
   "mpp_header": "Payment id=\"dGl1SjeOpyasbv5c7DDrSpuJNosS",
   "channel": "header",
   "content_type": "application/problem+json",
   "latency_ms": 3864,
   "error": null,
   "error_text": "Payment is required (Exact factorial n! for 0 ≤ n ≤ 20000, returned as a decimal string with its digit count.).",
   "id": "5e61c7489fd7",
   "url": "https://combinatorics.openverbs.com/v1/factorial",
   "via": "cron",
   "prev_status": "unprobed",
   "census_status": "unprobed",
   "changed": true
  }
 },
 "page": "https://bazaar.agentexchange.work/seller/combinatorics.openverbs.com",
 "badge": "https://bazaar.agentexchange.work/seller/combinatorics.openverbs.com.svg",
 "paid": {
  "report_now": {
   "url": "https://bazaar.agentexchange.work/seller/combinatorics.openverbs.com/report.json",
   "price_usd": 0.05,
   "protocol": "x402"
  }
 },
 "license": "CC BY 4.0"
}