x402 List

x402 Protocol Service Directory

●

LogiGrain

Other PAYMENT-READY

payment-ready until 2026-09-14

Deterministic calendrical, astronomical, and divination computation nodes for AI agents. Each endpoint performs exact calculations that LLMs cannot reliably reproduce—solar-term boundaries via apparent solar longitude (Meeus), sexagenary cycle pillars, full natal charts (planet longitudes, ASC/MC, houses, aspects), and Zi Wei Dou Shu charts—each with cited accuracy bounds in a meta field. Verified against primary sources (NAOJ, JPL, Meeus). Pay-per-call via x402 (USDC on Base, CDP facilitator).

Pay from $0.001 per request in USDC on Base, settled onchain via the x402 protocol, no signup, no API key needed.

measured since 2026-06-27 (start of our harvest window) · $0 all-time · last settled 2026-06-27

BASE URL https://logigrain.net │ WEBSITE https://logigrain.net │ ENDPOINTS 4 │ NETWORK Base │ ASSET USDC │ MEMBER SINCE 2026-07-01 │ MONITORED SINCE 2026-07-01

VERDICT

ranking generation 3

solid 90/100 #13 of 31 in Other by measured score

What the score read on this service: status online, 100% uptime 30d, 321ms response p95, x402 compliance 14 of 14, $0.001 price against the category, on-chain traction measured. Each of those is measured, and each is published in full below.

The score comes from our own monitoring, never from reviews, operator claims, or a language model: reliability, x402 compliance, price against the category, a deterministic risk flag, and a small on-chain traction term, weighted by ranking generation 3. It is not placement anyone can buy: the paid verify tier is reported beside it and is not one of its inputs. Every component below stays published and read-only.

It is a score inside Other, and only there: price and speed are scored against the whole category field, every listing in it that carries no danger flag, the scored service included, which here means 31 listings, this one among them. That set is wider than the 31 the position above is counted against, because a listing we have measured too little of to rank still sits in the field the price and the speed are normalized over. The same service in a different field would read differently. The same engine answers GET /api/v1/best, and asked for a different pool (the whole directory, or another filter) it returns a different number for this service under this same ranking generation. Neither is more correct: they answer different questions, and the methodology states which is which.

Bands on the 0 to 100 measured score: strong at 93 and above, solid from 75, mixed from 55, weak below 55. Price and speed are scored against the whole category field, every listing in it that carries no danger flag, the scored service included, so the score places a service in its own field.

ALTERNATIVES IN OTHER

Other Other services in this directory, ordered by the same measured score. The figures are ours: 30-day uptime from our own probes, 30-day settlement volume read on-chain (a conservative undercount, and null where we cannot measure it, never a zero).

Ranked alternative x402 services in the same category, with band, measured score, 30-day uptime and 30-day on-chain settlement volume
SERVICE BAND SCORE UPTIME 30D VOL 30D
Clash of Coins Checkout strong 97 99.9% ---
Fabler Labs x402 Storefront strong 97 100% ---
FabTally Agent API strong 97 100% ---
Hermes Commerce — DACH x402 compliance strong 95 100% ---
WDH.sh — QR Codes strong 95 100% ---
5 of 30 other ranked services in Other

ASSESSMENT

updated 2h ago

The parts the verdict above is computed from, each with its proof. Click any chip. Measured values stay read-only; unknown is honest, and an unknown is never counted as a zero.

reliability 100%
uptime 24h
100%
uptime 7d
100%
uptime 30d
100%
uptime 90d
100%
response p95
321ms
avg response
284ms
total checks
2,700

Measured on the unpaid 402 handshake, not the paid call. A service can 402 correctly and still fail after payment.

compliance A (14/14)

14 of 14 x402 conformance checks pass. Full checklist below.

jump to compliance checklist

price $0.001 (p6 in Other)
price (min)
$0.001
category percentile (min)
p6 in Other
endpoints / prices
4 / 1
model
flat
stability
100%
risk clean

No deterministic risk flag. Risk fires only on an exact blocklist match, or a reserved-brand name with a mismatched verified payTo. Never from low uptime, a high price, or a model guess.

domain age
126d
registrar
Cloudflare, Inc.
hosting
custom
domain created
2026-04-28

Identity facts, not a risk score.

traction $0.00 30d · 0 buyers
volume 30d
$0.00
buyers 30d
0
settlements 30d
0
measured since
2026-06-27 (start of our harvest window)
last settlement
2026-06-27
top buyer share
-
trend 7d vs 30d
-
networks
eip155:8453
volume all-time
$0
settlements all-time
4
median settlement 30d
-
max settlement 30d
-
settled via
-

Conservative undercount: only USDC settlements via facilitators we measure are counted. A measured floor, not an estimate.

Top buyer share is a concentration signal, not part of the ranking score.

WHAT IT DOES

ai-derived

No AI synthesis has been produced for this service yet.

ENDPOINTS

Service endpoints with HTTP method, path, description, pricing, and network
METHOD PATH DESCRIPTION PRICE NETWORK ASSET 402 CHANNEL
GET /api/kyusei $0.001 Base USDC header
GET /api/seiyo $0.001 Base USDC header
GET /api/shibu $0.001 Base USDC header
GET /api/shichu $0.001 Base USDC header
4 endpoints

REQUEST / RESPONSE EXAMPLE

An unpaid request to GET /api/kyusei returns HTTP 402 with the payment terms. Settle onchain via your facilitator, then retry with the X-Payment header.

// request
curl -i 'https://logigrain.net/api/kyusei'
// 402 response (captured by monitor) · 4 payloads · click to expand 
[
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x716fdE0dAc4Ef6ed2018206d43697C6Bb71D7EB3",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://logigrain.net/api/shichu",
      "mimeType": "application/json",
      "description": "LogiGrain API access"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "pathParams": {
              "var1": "shichu"
            },
            "queryParams": {
              "rate": "7",
              "years": "20",
              "principal": "10000"
            }
          },
          "output": {
            "type": "json",
            "example": {
              "result": 38697
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method"
              ],
              "properties": {
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "pathParams": {
                  "type": "object"
                },
                "queryParams": {
                  "type": "object",
                  "properties": {
                    "rate": {
                      "type": "string",
                      "description": "Numeric input parameter"
                    },
                    "years": {
                      "type": "string",
                      "description": "Numeric input parameter"
                    },
                    "principal": {
                      "type": "string",
                      "description": "Numeric input parameter"
                    }
                  }
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object",
                  "properties": {
                    "result": {
                      "type": "number"
                    }
                  }
                }
              }
            }
          }
        },
        "routeTemplate": "/api/:var1"
      }
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x716fdE0dAc4Ef6ed2018206d43697C6Bb71D7EB3",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://logigrain.net/api/seiyo",
      "mimeType": "application/json",
      "description": "LogiGrain API access"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "pathParams": {
              "var1": "seiyo"
            },
            "queryParams": {
              "rate": "7",
              "years": "20",
              "principal": "10000"
            }
          },
          "output": {
            "type": "json",
            "example": {
              "result": 38697
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method"
              ],
              "properties": {
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "pathParams": {
                  "type": "object"
                },
                "queryParams": {
                  "type": "object",
                  "properties": {
                    "rate": {
                      "type": "string",
                      "description": "Numeric input parameter"
                    },
                    "years": {
                      "type": "string",
                      "description": "Numeric input parameter"
                    },
                    "principal": {
                      "type": "string",
                      "description": "Numeric input parameter"
                    }
                  }
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object",
                  "properties": {
                    "result": {
                      "type": "number"
                    }
                  }
                }
              }
            }
          }
        },
        "routeTemplate": "/api/:var1"
      }
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x716fdE0dAc4Ef6ed2018206d43697C6Bb71D7EB3",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://logigrain.net/api/kyusei",
      "mimeType": "application/json",
      "description": "LogiGrain API access"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "pathParams": {
              "var1": "kyusei"
            },
            "queryParams": {
              "rate": "7",
              "years": "20",
              "principal": "10000"
            }
          },
          "output": {
            "type": "json",
            "example": {
              "result": 38697
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method"
              ],
              "properties": {
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "pathParams": {
                  "type": "object"
                },
                "queryParams": {
                  "type": "object",
                  "properties": {
                    "rate": {
                      "type": "string",
                      "description": "Numeric input parameter"
                    },
                    "years": {
                      "type": "string",
                      "description": "Numeric input parameter"
                    },
                    "principal": {
                      "type": "string",
                      "description": "Numeric input parameter"
                    }
                  }
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object",
                  "properties": {
                    "result": {
                      "type": "number"
                    }
                  }
                }
              }
            }
          }
        },
        "routeTemplate": "/api/:var1"
      }
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x716fdE0dAc4Ef6ed2018206d43697C6Bb71D7EB3",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://logigrain.net/api/shibu",
      "mimeType": "application/json",
      "description": "LogiGrain API access"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "pathParams": {
              "var1": "shibu"
            },
            "queryParams": {
              "rate": "7",
              "years": "20",
              "principal": "10000"
            }
          },
          "output": {
            "type": "json",
            "example": {
              "result": 38697
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method"
              ],
              "properties": {
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "pathParams": {
                  "type": "object"
                },
                "queryParams": {
                  "type": "object",
                  "properties": {
                    "rate": {
                      "type": "string",
                      "description": "Numeric input parameter"
                    },
                    "years": {
                      "type": "string",
                      "description": "Numeric input parameter"
                    },
                    "principal": {
                      "type": "string",
                      "description": "Numeric input parameter"
                    }
                  }
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object",
                  "properties": {
                    "result": {
                      "type": "number"
                    }
                  }
                }
              }
            }
          }
        },
        "routeTemplate": "/api/:var1"
      }
    },
    "x402Version": 2
  }
]

OVER TIME

All charts use the 30d selector; each series spans only the dates it has data for. Every series is also served as JSON at /api/v1/services/logigrain/price, /scores, /volume and /buyers. On-chain volume and distinct buyers are measured over the service's settlement address and are a conservative undercount (only settlements that reach a measured facilitator are counted). The on-chain series roll up hourly, so the latest day can be up to about an hour behind; distinct buyers are counted per payout address, so a service that settles to more than one address is an upper bound.

UPTIME
08-09 · uptime 100.0% · 397ms avg08-10 · uptime 100.0% · 336ms avg08-11 · uptime 100.0% · 287ms avg08-12 · uptime 100.0% · 235ms avg08-13 · uptime 100.0% · 250ms avg08-14 · uptime 100.0% · 284ms avg08-15 · uptime 100.0% · 183ms avg08-16 · uptime 100.0% · 181ms avg08-17 · uptime 100.0% · 215ms avg08-18 · uptime 100.0% · 211ms avg08-19 · uptime 100.0% · 181ms avg08-20 · uptime 100.0% · 218ms avg08-21 · uptime 100.0% · 189ms avg08-22 · uptime 100.0% · 252ms avg08-23 · uptime 100.0% · 240ms avg08-24 · uptime 100.0% · 230ms avg08-25 · uptime 100.0% · 316ms avg08-26 · uptime 100.0% · 269ms avg08-27 · uptime 100.0% · 424ms avg08-28 · uptime 100.0% · 321ms avg08-29 · uptime 100.0% · 351ms avg08-30 · uptime 100.0% · 461ms avg08-31 · uptime 100.0% · 433ms avg09-01 · uptime 100.0% · 341ms avg09-02 · uptime 100.0% · 380ms avg09-03 · uptime 100.0% · 308ms avg09-04 · uptime 100.0% · 371ms avg09-05 · uptime 100.0% · 222ms avg09-06 · uptime 100.0% · 189ms avg09-07 · uptime 100.0% · 179ms avg08-0909-07
30d UPTIME 100%
RESPONSE TIME
08-09 · 397ms avg08-09 · 397ms avg08-10 · 336ms avg08-10 · 336ms avg08-11 · 287ms avg08-11 · 287ms avg08-12 · 235ms avg08-12 · 235ms avg08-13 · 250ms avg08-13 · 250ms avg08-14 · 284ms avg08-14 · 284ms avg08-15 · 183ms avg08-15 · 183ms avg08-16 · 181ms avg08-16 · 181ms avg08-17 · 215ms avg08-17 · 215ms avg08-18 · 211ms avg08-18 · 211ms avg08-19 · 181ms avg08-19 · 181ms avg08-20 · 218ms avg08-20 · 218ms avg08-21 · 189ms avg08-21 · 189ms avg08-22 · 252ms avg08-22 · 252ms avg08-23 · 240ms avg08-23 · 240ms avg08-24 · 230ms avg08-24 · 230ms avg08-25 · 316ms avg08-25 · 316ms avg08-26 · 269ms avg08-26 · 269ms avg08-27 · 424ms avg08-27 · 424ms avg08-28 · 321ms avg08-28 · 321ms avg08-29 · 351ms avg08-29 · 351ms avg08-30 · 461ms avg08-30 · 461ms avg08-31 · 433ms avg08-31 · 433ms avg09-01 · 341ms avg09-01 · 341ms avg09-02 · 380ms avg09-02 · 380ms avg09-03 · 308ms avg09-03 · 308ms avg09-04 · 371ms avg09-04 · 371ms avg09-05 · 222ms avg09-05 · 222ms avg09-06 · 189ms avg09-06 · 189ms avg09-07 · 179ms avg09-07 · 179ms avg08-0909-07
AVG RESP 284ms
PRICE (captured 402, USD)
08-08 · $0.00109-07 · $0.001$0.00108-0809-07

Median across 4 endpoints. Use the selector to isolate one.

SUB-SCORES (uptime + x402 compliance)
08-08 uptime: 100.0% compliance: 100% checks08-09 uptime: 100.0% compliance: 100% checks08-10 uptime: 100.0% compliance: 100% checks08-11 uptime: 100.0% compliance: 100% checks08-12 uptime: 100.0% compliance: 100% checks08-13 uptime: 100.0% compliance: 100% checks08-14 uptime: 100.0% compliance: 100% checks08-15 uptime: 100.0% compliance: 100% checks08-16 uptime: 100.0% compliance: 100% checks08-17 uptime: 100.0% compliance: 100% checks08-18 uptime: 100.0% compliance: 100% checks08-19 uptime: 100.0% compliance: 100% checks08-20 uptime: 100.0% compliance: 100% checks08-21 uptime: 100.0% compliance: 100% checks08-22 uptime: 100.0% compliance: 100% checks08-23 uptime: 100.0% compliance: 100% checks08-24 uptime: 100.0% compliance: 100% checks08-25 uptime: 100.0% compliance: 100% checks08-26 uptime: 100.0% compliance: 100% checks08-27 uptime: 100.0% compliance: 100% checks08-28 uptime: 100.0% compliance: 100% checks08-29 uptime: 100.0% compliance: 100% checks08-30 uptime: 100.0% compliance: 100% checks08-31 uptime: 100.0% compliance: 100% checks09-01 uptime: 100.0% compliance: 100% checks09-02 uptime: 100.0% compliance: 100% checks09-03 uptime: 100.0% compliance: 100% checks09-04 uptime: 100.0% compliance: 100% checks09-05 uptime: 100.0% compliance: 100% checks09-06 uptime: 100.0% compliance: 100% checks09-07 uptime: 100.0% compliance: 100% checksuptimecompliance08-0809-07

checklist grew 11->14 on 2026-07-28; a step here is a metric change, not a regression

PILLARS OVER TIME (measured)
price percentile in Other
site signals present (of 6)

Measured site and economics pillars from the assessment history, so the latest value shown elsewhere on this page reads as a point on a trend rather than a permanent state.

VOLUME (on-chain settlement, USD)
no on-chain volume yet
DISTINCT BUYERS
no distinct buyers yet

COMPLIANCE

14/14 checks pass · grade A

last 402 captured 2026-07-13 · last up 2026-09-07

  • 402 payload captured
  • accepts[] array present
  • payTo address recoverable
  • payTo at accepts[0].payTo (conformant shape)
  • payTo is a valid on-chain address
  • atomic price declared
  • atomic price in a sane range
  • asset (token) address declared
  • network resolves to CAIP-2
  • payment scheme declared
  • served over HTTPS
  • declares the current x402 version (2)
  • EIP-712 domain parameters present on every EVM entry
  • x402 v2 envelope delivered in the payment-required header

SITE PILLARS

  • homepage reachable
  • openapi doc
  • pricing page
  • llms.txt
  • robots.txt
  • terms page
recent checks (18) live · click to expand
TIME STATUS RESP CAUSE
● OK 204ms
● OK 192ms
● OK 142ms
● OK 235ms
● OK 120ms
● OK 203ms
● OK 158ms
● OK 136ms
● OK 196ms
● OK 203ms
● OK 211ms
● OK 203ms
● OK 215ms
● OK 185ms
● OK 158ms
● OK 160ms
● OK 255ms
● OK 349ms
18 of 2,707 checks · live count

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RUN THIS SERVICE?

Keep this listing accurate: propose changes to the name, description, website, category or add new endpoints to monitor. Ownership is verified with a domain proof and every change is reviewed manually; measured data stays read-only.

[ update this listing ]

Earn the verified tier: x402list pays a real call to this endpoint and, if it delivers, the service is delivery-verified. The fee covers the cost of the probe, not the badge; there is no refund if the call does not deliver. Agent and API only, no in-browser signing. See /api.

[ verify this service ($0.25) ]

To request delisting, email info@x402-list.com or update your listing at /services/logigrain/update.