x402 List

x402 Protocol Service Directory

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Attester: Verification Oracle & Verified Research

AI PAYMENT-READY

payment-ready until 2026-09-11

Independent verification of agent work products: citation-support checks and data/schema validation returning wallet-signed attestations (EIP-191), plus cited coding research that ships pre-verified with a signed attestation over its citations. Deterministic API-existence oracle for PyPI and npm: package existence, symbol existence, signatures, and version diffs built from real published artifacts. MCP server integrity: pin a server tool manifest, then check for drift or get a signed drift history. USDC on Base mainnet via CDP facilitator. Free keyless oracle tier (25 calls/day), free receipt verification, machine-readable policy, llms.txt + OpenAPI.

Pay from $0.002 to $0.15 per request in USDC on Base, settled onchain via the x402 protocol, no signup, no API key needed.

measured since 2026-07-20 (start of our harvest window) · $2.04 all-time · settled via coinbase

BASE URL https://attester.dev │ WEBSITE https://attester.dev │ ENDPOINTS 11 │ NETWORK Base │ ASSET USDC │ MEMBER SINCE 2026-07-21 │ MONITORED SINCE 2026-07-21

VERDICT

ranking generation 3

solid 77/100 #83 of 104 in AI by measured score

What the score read on this service: status degraded, 97.1% uptime 30d, 2591ms response p95, x402 compliance 14 of 14, $0.002 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 AI, 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 104 listings, this one among them. That set is wider than the 104 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 AI

Other AI 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
Genesis strong 98 100% ---
Spraay Gateway strong 97 100% ---
Otto AI strong 95 100% $34.57
Gondola strong 95 100% ---
witnessd strong 94 100% ---
5 of 103 other ranked services in AI · see the whole category

ASSESSMENT

updated 3h 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 97.1%
uptime 24h
92%
uptime 7d
90.2%
uptime 30d
97.1%
uptime 90d
98.1%
response p95
2591ms
avg response
1676ms
total checks
2,762

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 $0.002 to $0.15 (p18 in AI)
price (min)
$0.002
price (max)
$0.15
category percentile (min)
p18 in AI
category percentile (max)
p57 in AI
endpoints / prices
11 / 7
model
tiered
stability
0%
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
43d
registrar
CloudFlare, Inc.
hosting
custom
domain created
2026-07-20

Identity facts, not a risk score.

traction $0.161 30d · 4 buyers
volume 30d
$0.161
buyers 30d
4
settlements 30d
6
measured since
2026-07-20 (start of our harvest window)
last settlement
2026-08-30
top buyer share
62% of 30d volume
trend 7d vs 30d
0.05x the 30d daily rate
networks
eip155:8453
volume all-time
$2.04
settlements all-time
37
median settlement 30d
$0.0035
max settlement 30d
$0.10
settled via
coinbase ($0.16, 6 tx)

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.

CHANGES

1 in 30d

Payout, price, and schema changes detected on this service's x402 wire. A payout rotation at an unchanged price shows up here even when nothing else moves. Full feed at /changes.

changes schema changed 23d ago (1 in 30d)

schema changed · 23d ago

endpoint added GET /v2/mcp/check

endpoint added GET /v2/mcp/report

schema added GET /v2/mcp/check exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added GET /v2/mcp/report exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

see all changes for this service

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
POST /code-research $0.10 Base USDC header
GET /judge $0.10 Base USDC header
GET /spend-check $0.005 Base USDC header
GET /v1/diff $0.02 Base USDC header
GET /v1/package/exists $0.002 Base USDC header
GET /v1/symbol/exists $0.005 Base USDC header
GET /v1/symbol/signature $0.01 Base USDC header
GET /v2/mcp/check $0.01 Base USDC header
GET /v2/mcp/report $0.05 Base USDC header
POST /verify $0.15 Base USDC header
GET /watchtower/report $0.05 Base USDC header
11 endpoints

REQUEST / RESPONSE EXAMPLE

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

// request
curl -i 'https://attester.dev/judge'
// 402 response (captured by monitor) · 11 payloads · click to expand 
[
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x57407D691F755cAa107647718F3582a8A87467dD",
        "amount": "10000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://attester.dev/v2/mcp/check",
      "mimeType": "application/json",
      "description": "MCP manifest drift check (use POST; metadata on POST)."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x57407D691F755cAa107647718F3582a8A87467dD",
        "amount": "50000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://attester.dev/v2/mcp/report",
      "mimeType": "application/json",
      "description": "MCP manifest drift report (use POST; metadata on POST)."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x57407D691F755cAa107647718F3582a8A87467dD",
        "amount": "100000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://attester.dev/code-research",
      "tags": [
        "research",
        "coding",
        "citations",
        "docs",
        "agents"
      ],
      "mimeType": "application/json",
      "description": "Cited coding research for agents: library/API usage answers, error diagnosis and best-practice lookups with real citations. $0.10 USDC per call.",
      "serviceName": "Cited Coding Research"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "query": "How do I stream responses with the OpenAI Python SDK?",
              "context": null
            },
            "type": "http",
            "method": "POST",
            "bodyType": "json"
          },
          "output": {
            "type": "json",
            "example": {
              "answer": "Use stream=True ...",
              "citations": [
                {
                  "url": "https://platform.openai.com/docs",
                  "title": "OpenAI docs",
                  "snippet": "..."
                }
              ]
            }
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "properties": {
                "body": {
                  "type": "object",
                  "required": [
                    "query"
                  ],
                  "properties": {
                    "query": {
                      "type": "string",
                      "description": "Coding question to research"
                    },
                    "context": {
                      "type": [
                        "string",
                        "null"
                      ],
                      "description": "Optional extra context"
                    }
                  }
                },
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "POST"
                  ],
                  "type": "string"
                },
                "bodyType": {
                  "enum": [
                    "json"
                  ],
                  "type": "string"
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "example"
              ],
              "properties": {
                "example": {
                  "type": "object"
                }
              }
            }
          }
        },
        "category": "ai",
        "discoverable": true
      }
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x57407D691F755cAa107647718F3582a8A87467dD",
        "amount": "100000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://attester.dev/judge",
      "mimeType": "application/json",
      "description": "QA Judge (use POST; full Bazaar metadata on POST)."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x57407D691F755cAa107647718F3582a8A87467dD",
        "amount": "20000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://attester.dev/v1/diff",
      "mimeType": "application/json",
      "description": "Package version diff (use POST; metadata on POST)."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x57407D691F755cAa107647718F3582a8A87467dD",
        "amount": "2000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://attester.dev/v1/package/exists",
      "mimeType": "application/json",
      "description": "Package existence check (use POST; metadata on POST)."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x57407D691F755cAa107647718F3582a8A87467dD",
        "amount": "5000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://attester.dev/v1/symbol/exists",
      "mimeType": "application/json",
      "description": "Symbol existence check (use POST; metadata on POST)."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x57407D691F755cAa107647718F3582a8A87467dD",
        "amount": "50000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://attester.dev/watchtower/report",
      "mimeType": "application/json",
      "description": "SLA Watchtower report (use POST; full Bazaar metadata on POST)."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x57407D691F755cAa107647718F3582a8A87467dD",
        "amount": "150000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://attester.dev/verify",
      "tags": [
        "verification",
        "attestation",
        "agents",
        "trust",
        "audit"
      ],
      "mimeType": "application/json",
      "description": "Verification Oracle: independent checks on another agent's work (citation support, data/schema validation) returning a wallet-signed attestation. $0.15 USDC per verification.",
      "serviceName": "Verification Oracle"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "job": {
                "type": "citation",
                "claim": "Python was created by Guido van Rossum",
                "sources": [
                  "https://en.wikipedia.org/wiki/Python_(programming_language)"
                ]
              }
            },
            "type": "http",
            "method": "POST",
            "bodyType": "json"
          },
          "output": {
            "type": "json",
            "example": {
              "verdict": "pass",
              "signature": "0x…",
              "confidence": 0.83,
              "attestation": {
                "service_version": "0.2.0",
                "verifier_address": "0x31520f9c14360470040807fAba64938ebcfF9C8f"
              }
            }
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "properties": {
                "body": {
                  "type": "object",
                  "required": [
                    "job"
                  ],
                  "properties": {
                    "job": {
                      "type": "object",
                      "required": [
                        "type"
                      ],
                      "properties": {
                        "type": {
                          "enum": [
                            "citation",
                            "code",
                            "data"
                          ],
                          "type": "string"
                        },
                        "claim": {
                          "type": "string"
                        },
                        "sources": {
                          "type": "array",
                          "items": {
                            "type": "string"
                          }
                        }
                      },
                      "description": "Verification job: citation support check, data/schema validation"
                    }
                  }
                },
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "POST"
                  ],
                  "type": "string"
                },
                "bodyType": {
                  "enum": [
                    "json"
                  ],
                  "type": "string"
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "example"
              ],
              "properties": {
                "example": {
                  "type": "object"
                }
              }
            }
          }
        },
        "category": "ai",
        "discoverable": true
      }
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x57407D691F755cAa107647718F3582a8A87467dD",
        "amount": "5000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://attester.dev/spend-check",
      "mimeType": "application/json",
      "description": "Spend Check (use POST; full Bazaar metadata on POST)."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x57407D691F755cAa107647718F3582a8A87467dD",
        "amount": "10000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://attester.dev/v1/symbol/signature",
      "mimeType": "application/json",
      "description": "Symbol signature lookup (use POST; metadata on POST)."
    },
    "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/attester-verification-oracle-verified-research/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
08-30 · uptime 89.9% · 2101ms avg08-31 · uptime 91.1% · 2285ms avg09-01 · uptime 80.0% · 2429ms avg09-02 · uptime 84.4% · 2349ms avg09-04 · uptime 92.0% · 2090ms avg08-06 · uptime 100.0% · 908ms avg08-07 · uptime 100.0% · 926ms avg08-08 · uptime 100.0% · 927ms avg08-09 · uptime 100.0% · 1061ms avg08-10 · uptime 100.0% · 1251ms avg08-11 · uptime 100.0% · 1308ms avg08-12 · uptime 98.9% · 1334ms avg08-13 · uptime 100.0% · 1306ms avg08-14 · uptime 100.0% · 1369ms avg08-15 · uptime 100.0% · 1458ms avg08-16 · uptime 100.0% · 1429ms avg08-17 · uptime 100.0% · 1496ms avg08-18 · uptime 100.0% · 1627ms avg08-19 · uptime 100.0% · 1717ms avg08-20 · uptime 98.9% · 1814ms avg08-21 · uptime 100.0% · 1836ms avg08-22 · uptime 100.0% · 1912ms avg08-23 · uptime 100.0% · 1925ms avg08-24 · uptime 95.6% · 2033ms avg08-25 · uptime 96.7% · 2076ms avg08-26 · uptime 97.8% · 2057ms avg08-27 · uptime 95.6% · 2169ms avg08-28 · uptime 96.7% · 2103ms avg08-29 · uptime 98.9% · 2030ms avg08-30 · uptime 89.9% · 2101ms avg08-31 · uptime 91.1% · 2285ms avg09-01 · uptime 80.0% · 2429ms avg09-02 · uptime 84.4% · 2349ms avg09-03 · uptime 95.5% · 2084ms avg09-04 · uptime 92.0% · 2090ms avg08-0609-04
30d UPTIME 97.1%
RESPONSE TIME
08-06 · 908ms avg08-06 · 908ms avg08-07 · 926ms avg08-07 · 926ms avg08-08 · 927ms avg08-08 · 927ms avg08-09 · 1061ms avg08-09 · 1061ms avg08-10 · 1251ms avg08-10 · 1251ms avg08-11 · 1308ms avg08-11 · 1308ms avg08-12 · 1334ms avg08-12 · 1334ms avg08-13 · 1306ms avg08-13 · 1306ms avg08-14 · 1369ms avg08-14 · 1369ms avg08-15 · 1458ms avg08-15 · 1458ms avg08-16 · 1429ms avg08-16 · 1429ms avg08-17 · 1496ms avg08-17 · 1496ms avg08-18 · 1627ms avg08-18 · 1627ms avg08-19 · 1717ms avg08-19 · 1717ms avg08-20 · 1814ms avg08-20 · 1814ms avg08-21 · 1836ms avg08-21 · 1836ms avg08-22 · 1912ms avg08-22 · 1912ms avg08-23 · 1925ms avg08-23 · 1925ms avg08-24 · 2033ms avg08-24 · 2033ms avg08-25 · 2076ms avg08-25 · 2076ms avg08-26 · 2057ms avg08-26 · 2057ms avg08-27 · 2169ms avg08-27 · 2169ms avg08-28 · 2103ms avg08-28 · 2103ms avg08-29 · 2030ms avg08-29 · 2030ms avg08-30 · 2101ms avg08-30 · 2101ms avg08-31 · 2285ms avg08-31 · 2285ms avg09-01 · 2429ms avg09-01 · 2429ms avg09-02 · 2349ms avg09-02 · 2349ms avg09-03 · 2084ms avg09-03 · 2084ms avg09-04 · 2090ms avg09-04 · 2090ms avg08-0609-04
AVG RESP 1677ms
PRICE (captured 402, USD)
08-05 · $0.0208-12 · $0.0209-04 · $0.02$0.0208-0509-04

Median across 11 endpoints. Use the selector to isolate one.

SUB-SCORES (uptime + x402 compliance)
08-06 uptime: 100.0% compliance: 100% checks08-07 uptime: 100.0% compliance: 100% checks08-08 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: 99.9% 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: 99.9% compliance: 100% checks08-21 uptime: 99.9% compliance: 100% checks08-22 uptime: 99.9% compliance: 100% checks08-23 uptime: 99.9% compliance: 100% checks08-24 uptime: 99.8% compliance: 100% checks08-25 uptime: 99.7% compliance: 100% checks08-26 uptime: 99.6% compliance: 100% checks08-27 uptime: 99.5% compliance: 100% checks08-28 uptime: 99.4% compliance: 100% checks08-29 uptime: 99.3% compliance: 100% checks08-30 uptime: 99.0% compliance: 100% checks08-31 uptime: 98.7% compliance: 100% checks09-01 uptime: 98.3% compliance: 100% checks09-02 uptime: 97.5% compliance: 100% checks09-03 uptime: 97.3% compliance: 100% checks09-04 uptime: 97.1% compliance: 100% checksuptimecompliance08-0609-04

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 AI
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)
08-10 · $0.0608-23 · $0.0008-27 · $0.1008-30 · $0.00peak $0.1008-1008-30
DISTINCT BUYERS
08-10 · 1 buyer08-23 · 1 buyer08-27 · 1 buyer08-30 · 1 buyerpeak 1 buyer08-1008-30

COMPLIANCE

14/14 checks pass · grade A

last 402 captured 2026-08-12 · last up 2026-09-04

  • 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 2116ms
● OK 2234ms
● OK 1963ms
● OK 2146ms
● OK 2057ms
● OK 1753ms
● OK 1878ms
● OK 1649ms
● OK 2107ms
○ DOWN 2728ms timeout: timeout after 10000ms
● OK 2104ms
● OK 1932ms
● SLOW 2516ms
● OK 2309ms
● OK 2434ms
○ DOWN 2728ms timeout: timeout after 10000ms
● OK 2149ms
● OK 2430ms
18 of 2,772 checks · live count

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Attester: Verification Oracle & Verified Research listed on x402-list
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Attester: Verification Oracle & Verified Research uptime on x402-list
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