LogiGrain
Other PAYMENT-READYpayment-ready until 2026-08-20
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.
first settlement 2026-06-27 · $0 all-time · last settled 2026-06-27
ASSESSMENT
updated 3h agoEvidence-backed signals, not a single score. Click any chip for the proof. Measured values stay read-only; unknown is honest.
reliability 100%
- uptime 24h
- 100%
- uptime 7d
- 100%
- uptime 30d
- 100%
- uptime 90d
- 100%
- response p95
- 454ms
- avg response
- 308ms
- total checks
- 2,737
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.
price $0.001 (p13 in Other)
- price (min)
- $0.001
- category percentile (min)
- p13 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
- 104d
- 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
- first settlement
- 2026-06-27
- 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-derivedProvides astronomy, calendar, and divination calculations through an API.
- category
- astronomy-calculator
AI-generated summary. The measured data is never altered by it.
ENDPOINTS
| 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 | $0.001 | Base | USDC | header |
REQUEST / RESPONSE EXAMPLE
An unpaid request to GET /api/kyusei returns HTTP 402 with the payment terms. Settle onchain via your facilitator, then retry with the X-Payment header.
curl -i 'https://logigrain.net/api/kyusei'
// 402 response (captured by monitor) · 4 payloads · click to expand
[
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x716fdE0dAc4Ef6ed2018206d43697C6Bb71D7EB3",
"amount": "1000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://logigrain.net/api/shichu",
"mimeType": "application/json",
"description": "LogiGrain API access"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"pathParams": {
"var1": "shichu"
},
"queryParams": {
"rate": "7",
"years": "20",
"principal": "10000"
}
},
"output": {
"type": "json",
"example": {
"result": 38697
}
}
},
"schema": {
"type": "object",
"$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.
Median across 4 endpoints. Use the selector to isolate one.
checklist grew 11->14 on 2026-07-28; a step here is a metric change, not a regression
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.
COMPLIANCE
14/14 checks pass · grade Alast 402 captured 2026-07-13 · last up 2026-08-13
- 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
EMBED THIS BADGE
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