●

Mart402

Data PAYMENT-READY

payment-ready until 2026-08-20

Web & document extraction APIs for AI agents: URL-to-Markdown extraction, PDF parsing with hallucination-guarded OCR (dual-engine consensus + calibrated confidence + per-segment corroboration, Japanese-strong), invoice field verification, schema-driven structured extraction, and JP company profiles. Pay per call via x402 (USDC on Base), no account or API key. Free identical sandbox on Base Sepolia at mart402.dev. Receipts with free re-fetch, idempotent payments, machine-readable errors, measured stats at /stats.

Pay from $0.005 to $0.03 per request in USDC on Base, settled onchain via the x402 protocol, no signup, no API key needed.

first settlement 2026-07-25 · $23.63 all-time · settled via coinbase

BASE URL https://mart402.com │ WEBSITE https://mart402.com │ ENDPOINTS 5 │ NETWORK Base │ ASSET USDC │ MEMBER SINCE 2026-07-25 │ MONITORED SINCE 2026-07-25

ASSESSMENT

updated 2h ago

Evidence-backed signals, not a single score. Click any chip for the proof. Measured values stay read-only; unknown is honest.

reliability 99.8%

uptime 24h: 100%
uptime 7d: 100%
uptime 30d: 99.8%
uptime 90d: 99.8%
response p95: 326ms
avg response: 182ms
total checks: 1,712

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 $0.005 to $0.03 (p36 in Data)

price (min): $0.005
price (max): $0.03
category percentile (min): p36 in Data
category percentile (max): p50 in Data
endpoints / prices: 5 / 4
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: -
registrar: -
hosting: custom
domain created: ---

Identity facts, not a risk score.

traction $23.636 30d · 1 buyers · top buyer 100%

volume 30d: $23.636
buyers 30d: 1
settlements 30d: 50
first settlement: 2026-07-25
last settlement: 2026-08-12
top buyer share: 100% of 30d volume
trend 7d vs 30d: 4.23x the 30d daily rate
networks: eip155:8453
volume all-time: $23.63
settlements all-time: 50
median settlement 30d: $0.005
max settlement 30d: $19.90
settled via: coinbase ($23.64, 50 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

4 events, detecting since 2026-07-24

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 price changed 4d ago (4 since 2026-07-24)

price changed · 4d ago

GET /v1/extract · eip155:8453 · USDC: 3000 → 5000

GET /v1/jp-company · eip155:8453 · USDC: 20000 → 30000

GET /v1/parse · eip155:8453 · USDC: 5000 → 10000

GET /v1/structured · eip155:8453 · USDC: 20000 → 30000

GET /v1/verify · eip155:8453 · USDC: 5000 → 15000

price changed · 10d ago

GET /v1/extract · eip155:8453 · USDC: 2000 → 3000

GET /v1/verify · eip155:8453 · USDC: 1000 → 5000

schema changed · 12d ago

schema removed GET /v1/extract exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 1 application/json

schema removed GET /v1/jp-company exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 1 application/json

schema removed GET /v1/parse exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 1 application/json

schema removed GET /v1/structured exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 1 application/json

schema removed GET /v1/verify exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 1 application/json

schema added GET /v1/extract exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 2

schema added GET /v1/jp-company exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 2

schema added GET /v1/parse exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 2

schema added GET /v1/structured exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 2

schema added GET /v1/verify exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 2

price changed · 19d ago

GET /v1/parse · eip155:8453 · USDC: 4000 → 5000

Amounts are on-wire atomic units in the named asset.

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
GET	/v1/extract	mart402 extract	$0.005	Base	USDC	header
GET	/v1/jp-company	mart402 jp-company	$0.03	Base	USDC	header
GET	/v1/parse	mart402 parse (per page, quote first)	$0.01	Base	USDC	header
GET	/v1/structured	mart402 structured	$0.03	Base	USDC	header
GET	/v1/verify	mart402 verify	$0.015	Base	USDC	header

5 endpoints

REQUEST / RESPONSE EXAMPLE

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

// request

curl -i 'https://mart402.com/v1/extract'

// 402 response (captured by monitor) · 5 payloads · click to expand

[
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xE3244a21D0d68bFa78b7CAd8C3b8777aDFbB3188",
        "amount": "5000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 120
      }
    ],
    "resource": {
      "url": "https://mart402.com/v1/extract",
      "mimeType": "application/json",
      "description": "Web extraction for AI agents: URL to clean Markdown + metadata, automatic JS rendering, robots.txt respected. No API key.",
      "serviceName": "Mart402"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "url": "https://example.com/article",
              "mode": "auto"
            },
            "type": "http",
            "method": "POST",
            "bodyType": "json",
            "discoverable": true
          },
          "output": {
            "description": "JSON: markdown content, title, metadata, text_len, cache_hit; receipt id for free re-fetch"
          }
        }
      }
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xE3244a21D0d68bFa78b7CAd8C3b8777aDFbB3188",
        "amount": "10000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 120
      }
    ],
    "resource": {
      "url": "https://mart402.com/v1/parse",
      "mimeType": "application/json",
      "description": "PDF parsing: PDF to structured Markdown. Free quote first; flat 0.01/doc for text PDFs, 0.015/page for scanned OCR with hallucination guard (dual-engine consensus). Japanese-strong.",
      "serviceName": "Mart402"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "quote_id": "free from POST /v1/parse/quote {url}"
            },
            "type": "http",
            "method": "POST",
            "bodyType": "json",
            "discoverable": true
          },
          "output": {
            "description": "JSON: structured markdown per page, ocr_quality (confidence, hallucination flags), consensus verdict"
          }
        }
      }
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xE3244a21D0d68bFa78b7CAd8C3b8777aDFbB3188",
        "amount": "30000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 120
      }
    ],
    "resource": {
      "url": "https://mart402.com/v1/jp-company",
      "mimeType": "application/json",
      "description": "Japanese company profile: corporate site to standard JSON (name, address, representative, capital, contact). 0.03/site.",
      "serviceName": "Mart402"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "url": "https://company.example.jp/company/"
            },
            "type": "http",
            "method": "POST",
            "bodyType": "json",
            "discoverable": true
          },
          "output": {
            "description": "JSON: standard JP company profile (name, address, representative, capital, contact)"
          }
        }
      }
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xE3244a21D0d68bFa78b7CAd8C3b8777aDFbB3188",
        "amount": "30000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 120
      }
    ],
    "resource": {
      "url": "https://mart402.com/v1/structured",
      "mimeType": "application/json",
      "description": "Schema-driven extraction: fill YOUR JSON schema from any URL. Hybrid LLM + deterministic canonicalization. 0.03/call.",
      "serviceName": "Mart402"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "url": "https://example.com",
              "schema": {
                "title": "page title"
              }
            },
            "type": "http",
            "method": "POST",
            "bodyType": "json",
            "discoverable": true
          },
          "output": {
            "description": "JSON: your schema filled from the page, with per-field source evidence"
          }
        }
      }
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xE3244a21D0d68bFa78b7CAd8C3b8777aDFbB3188",
        "amount": "15000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 120
      }
    ],
    "resource": {
      "url": "https://mart402.com/v1/verify",
      "mimeType": "application/json",
      "description": "Invoice field verification for AI agents: arithmetic consistency of invoice fields, line-item totals, JP registration number check-digit + corporate-number existence observation (official NTA registry), accounting JSON. 0.015/call.",
      "serviceName": "Mart402"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "fields": {
                "tax": "100",
                "total": "1100",
                "subtotal": "1000",
                "tax_rate": "10%"
              }
            },
            "type": "http",
            "method": "POST",
            "bodyType": "json",
            "discoverable": true
          },
          "output": {
            "description": "JSON: per-check pass/fail with reasons"
          }
        }
      }
    },
    "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/mart402/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

30d UPTIME 99.8%

RESPONSE TIME

AVG RESP 182ms

PRICE (captured 402, USD)

Median across 5 endpoints. Use the selector to isolate one.

SUB-SCORES (uptime + x402 compliance)

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 Data

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)

DISTINCT BUYERS

COMPLIANCE

14/14 checks pass · grade A

last 402 captured 2026-08-09 · 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

TIME STATUS RESP CAUSE

16:51:07 UTC ● OK 134ms

16:35:06 UTC ● OK 111ms

16:19:07 UTC ● OK 212ms

16:03:07 UTC ● OK 151ms

15:47:06 UTC ● OK 126ms

15:31:07 UTC ● OK 124ms

15:15:08 UTC ● OK 76ms

14:59:08 UTC ● OK 135ms

14:43:07 UTC ● OK 109ms

14:27:08 UTC ● OK 151ms

14:11:07 UTC ● OK 66ms

13:55:08 UTC ● OK 140ms

13:39:09 UTC ● OK 145ms

13:23:09 UTC ● OK 159ms

13:07:50 UTC ● OK 165ms

12:52:08 UTC ● OK 234ms

12:36:08 UTC ● OK 171ms

12:20:09 UTC ● OK 197ms

EMBED THIS BADGE

Show that Mart402 is monitored on x402-list. Paste this on your site or README, it links back to this live listing.

status

Mart402 uptime on x402-list — live uptime

// HTML

<a href="https://x402-list.com/services/mart402?utm_source=badge&utm_medium=referral&utm_campaign=embed">
  <img src="https://x402-list.com/badge/mart402.svg" alt="Mart402 listed on x402-list" height="28">
</a>

// Markdown

[![Mart402 on x402-list](https://x402-list.com/badge/mart402.svg)](https://x402-list.com/services/mart402?utm_source=badge&utm_medium=referral&utm_campaign=embed)

// HTML · live uptime variant

<a href="https://x402-list.com/services/mart402?utm_source=badge&utm_medium=referral&utm_campaign=embed">
  <img src="https://x402-list.com/badge/mart402.svg?data=uptime" alt="Mart402 uptime on x402-list" height="28">
</a>

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/mart402/update.