x402 List

x402 Protocol Service Directory

●

Xingchen SentriScan ASP

Verification PAYMENT-READY

payment-ready until 2026-09-02

Official storefront https://asp.xhdym.sbs. 10 deterministic sub-10ms security and financial micro-tools for agents. Zero LLM, zero private key. x402 v2 USDT0 on X Layer. 3 free calls per IP per day then pay-per-call. Health /health Manifest /.well-known/x402.

Pay from $0.01 per request in UNKNOWN, settled onchain via the x402 protocol, no signup, no API key needed.

BASE URL https://asp.xhdym.sbs │ WEBSITE https://asp.xhdym.sbs │ ENDPOINTS 10 │ NETWORK │ ASSET UNKNOWN │ MEMBER SINCE 2026-08-25 │ MONITORED SINCE 2026-08-25

VERDICT

ranking generation 3

solid 86/100 #11 of 48 in Verification by measured score

What the score read on this service: status online, 100% uptime 30d, 307ms response p95, x402 compliance 13 of 14, $0.01 price against the category. 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 Verification, 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 48 listings, this one among them. That set is wider than the 48 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 VERIFICATION

Other Verification 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
LION — Verified Company & Compliance Data strong 99 100% ---
10x402 strong 96 100% ---
Vibes-Coded Agent Tool API strong 94 99.9% ---
Butterfly Delta Order Preflight strong 94 100% ---
PayPerByte solid 91 99.6% ---
5 of 47 other ranked services in Verification

ASSESSMENT

updated 4h 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
307ms
avg response
216ms
total checks
93

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

compliance C (13/14): EIP-712 domain parameters present on every EVM entry

13 of 14 x402 conformance checks pass; failing: EIP-712 domain parameters present on every EVM entry. Full checklist below.

jump to compliance checklist

signability route not signable

At least one EVM route on this service returns its 402 without the EIP-712 domain parameters (extra.name and extra.version), so a standard x402 client cannot build the signature for that route.

Measured on the last 402 envelope captured from this service. It is a fact about the envelope, not a judgement on the service or its operator.

This is the only conformance check that caps the compliance grade, at C.

jump to compliance checklist

price $0.01 (p43 in Verification)
price (min)
$0.01
category percentile (min)
p43 in Verification
endpoints / prices
10 / 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
255d
registrar
NameSilo, LLC
hosting
custom
domain created
2025-12-12

Identity facts, not a risk score.

traction ---

This service settles on a network x402-list does not measure yet, so on-chain volume is not counted here. Shown as unmeasured, not zero.

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 /v1/calc-arbitrage $0.01 UNKNOWN header
GET /v1/calc-impermanent-loss $0.01 UNKNOWN header
GET /v1/clean-markdown $0.01 UNKNOWN header
GET /v1/detect-wash-trading $0.01 UNKNOWN header
GET /v1/market-factors $0.01 UNKNOWN header
GET /v1/optimize-gas $0.01 UNKNOWN header
GET /v1/repair-json $0.01 UNKNOWN header
GET /v1/scan-contract $0.01 UNKNOWN header
GET /v1/scan-secrets $0.01 UNKNOWN header
GET /v1/validate-address $0.01 UNKNOWN header
10 endpoints

REQUEST / RESPONSE EXAMPLE

An unpaid request to GET /v1/calc-arbitrage returns HTTP 402 with the payment terms. Settle onchain via your facilitator, then retry with the X-Payment header.

// request
curl -i 'https://asp.xhdym.sbs/v1/calc-arbitrage'
// 402 response (captured by monitor) · 10 payloads · click to expand 
[
  {
    "accepts": [
      {
        "asset": "0x779ded0c9e1022225f8e0630b35a9b54be713736",
        "extra": {
          "token": "USDT0",
          "decimals": 6,
          "priceUsd": "$0.01"
        },
        "payTo": "0x773f5143C6211E4C7BfAE354dab8B203197545bE",
        "amount": "10000",
        "scheme": "exact",
        "network": "eip155:196",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://asp.xhdym.sbs/v1/scan-contract",
      "mimeType": "application/json",
      "description": "Call Xingchen ASP Tool: assess_contract_risk"
    },
    "x402Version": 2
  },
  {
    "accepts": [
      {
        "asset": "0x779ded0c9e1022225f8e0630b35a9b54be713736",
        "extra": {
          "token": "USDT0",
          "decimals": 6,
          "priceUsd": "$0.01"
        },
        "payTo": "0x773f5143C6211E4C7BfAE354dab8B203197545bE",
        "amount": "10000",
        "scheme": "exact",
        "network": "eip155:196",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://asp.xhdym.sbs/v1/scan-secrets",
      "mimeType": "application/json",
      "description": "Call Xingchen ASP Tool: scan_code_secrets"
    },
    "x402Version": 2
  },
  {
    "accepts": [
      {
        "asset": "0x779ded0c9e1022225f8e0630b35a9b54be713736",
        "extra": {
          "token": "USDT0",
          "decimals": 6,
          "priceUsd": "$0.01"
        },
        "payTo": "0x773f5143C6211E4C7BfAE354dab8B203197545bE",
        "amount": "10000",
        "scheme": "exact",
        "network": "eip155:196",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://asp.xhdym.sbs/v1/market-factors",
      "mimeType": "application/json",
      "description": "Call Xingchen ASP Tool: format_market_factors"
    },
    "x402Version": 2
  },
  {
    "accepts": [
      {
        "asset": "0x779ded0c9e1022225f8e0630b35a9b54be713736",
        "extra": {
          "token": "USDT0",
          "decimals": 6,
          "priceUsd": "$0.01"
        },
        "payTo": "0x773f5143C6211E4C7BfAE354dab8B203197545bE",
        "amount": "10000",
        "scheme": "exact",
        "network": "eip155:196",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://asp.xhdym.sbs/v1/clean-markdown",
      "mimeType": "application/json",
      "description": "Call Xingchen ASP Tool: extract_clean_markdown"
    },
    "x402Version": 2
  },
  {
    "accepts": [
      {
        "asset": "0x779ded0c9e1022225f8e0630b35a9b54be713736",
        "extra": {
          "token": "USDT0",
          "decimals": 6,
          "priceUsd": "$0.01"
        },
        "payTo": "0x773f5143C6211E4C7BfAE354dab8B203197545bE",
        "amount": "10000",
        "scheme": "exact",
        "network": "eip155:196",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://asp.xhdym.sbs/v1/calc-arbitrage",
      "mimeType": "application/json",
      "description": "Call Xingchen ASP Tool: calc_arbitrage_spread"
    },
    "x402Version": 2
  },
  {
    "accepts": [
      {
        "asset": "0x779ded0c9e1022225f8e0630b35a9b54be713736",
        "extra": {
          "token": "USDT0",
          "decimals": 6,
          "priceUsd": "$0.01"
        },
        "payTo": "0x773f5143C6211E4C7BfAE354dab8B203197545bE",
        "amount": "10000",
        "scheme": "exact",
        "network": "eip155:196",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://asp.xhdym.sbs/v1/calc-impermanent-loss",
      "mimeType": "application/json",
      "description": "Call Xingchen ASP Tool: calc_impermanent_loss"
    },
    "x402Version": 2
  },
  {
    "accepts": [
      {
        "asset": "0x779ded0c9e1022225f8e0630b35a9b54be713736",
        "extra": {
          "token": "USDT0",
          "decimals": 6,
          "priceUsd": "$0.01"
        },
        "payTo": "0x773f5143C6211E4C7BfAE354dab8B203197545bE",
        "amount": "10000",
        "scheme": "exact",
        "network": "eip155:196",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://asp.xhdym.sbs/v1/validate-address",
      "mimeType": "application/json",
      "description": "Call Xingchen ASP Tool: validate_evm_address"
    },
    "x402Version": 2
  },
  {
    "accepts": [
      {
        "asset": "0x779ded0c9e1022225f8e0630b35a9b54be713736",
        "extra": {
          "token": "USDT0",
          "decimals": 6,
          "priceUsd": "$0.01"
        },
        "payTo": "0x773f5143C6211E4C7BfAE354dab8B203197545bE",
        "amount": "10000",
        "scheme": "exact",
        "network": "eip155:196",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://asp.xhdym.sbs/v1/repair-json",
      "mimeType": "application/json",
      "description": "Call Xingchen ASP Tool: clean_dirty_json"
    },
    "x402Version": 2
  },
  {
    "accepts": [
      {
        "asset": "0x779ded0c9e1022225f8e0630b35a9b54be713736",
        "extra": {
          "token": "USDT0",
          "decimals": 6,
          "priceUsd": "$0.01"
        },
        "payTo": "0x773f5143C6211E4C7BfAE354dab8B203197545bE",
        "amount": "10000",
        "scheme": "exact",
        "network": "eip155:196",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://asp.xhdym.sbs/v1/detect-wash-trading",
      "mimeType": "application/json",
      "description": "Call Xingchen ASP Tool: detect_wash_trade_flow"
    },
    "x402Version": 2
  },
  {
    "accepts": [
      {
        "asset": "0x779ded0c9e1022225f8e0630b35a9b54be713736",
        "extra": {
          "token": "USDT0",
          "decimals": 6,
          "priceUsd": "$0.01"
        },
        "payTo": "0x773f5143C6211E4C7BfAE354dab8B203197545bE",
        "amount": "10000",
        "scheme": "exact",
        "network": "eip155:196",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://asp.xhdym.sbs/v1/optimize-gas",
      "mimeType": "application/json",
      "description": "Call Xingchen ASP Tool: optimize_gas_priority"
    },
    "x402Version": 2
  }
]

OVER TIME

All charts use the 24h selector; each series spans only the dates it has data for. Every series is also served as JSON at /api/v1/services/xingchen-sentriscan-asp/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
08-26 · uptime 100.0% · 220ms avg08-2608-26
24h UPTIME 100%
RESPONSE TIME
08-26 · 220ms avg08-26 · 220ms avg08-2608-26
AVG RESP 216ms
PRICE (captured 402, USD)
08-25 · $0.0108-26 · $0.01$0.0108-2508-26

Median across 10 endpoints. Use the selector to isolate one.

SUB-SCORES (uptime + x402 compliance)
08-25 uptime: 100.0% compliance: 93% checks08-26 uptime: 100.0% compliance: 93% checksuptimecompliance08-2508-26

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 Verification
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)
This service settles on a network x402-list does not measure yet, so on-chain volume is not counted here. Shown as unmeasured, not zero.
DISTINCT BUYERS
This service settles on a network x402-list does not measure yet, so distinct on-chain buyers are not counted here. Shown as unmeasured, not zero.

COMPLIANCE

13/14 checks pass · grade C · failing: EIP-712 domain parameters present on every EVM entry

last 402 captured 2026-08-25 · last up 2026-08-26

  • 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 145ms
● OK 267ms
● OK 199ms
● OK 136ms
● OK 268ms
● OK 160ms
● OK 136ms
● OK 239ms
● OK 138ms
● OK 239ms
● OK 227ms
● SLOW 403ms
● OK 190ms
● OK 220ms
● OK 276ms
● OK 204ms
● OK 206ms
● OK 248ms
18 of 108 checks · live count

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Xingchen SentriScan ASP listed on x402-list
status
Xingchen SentriScan ASP uptime on x402-list
live uptime
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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/xingchen-sentriscan-asp/update.