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Mart402

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 $0.001 to $0.02 per request in USDC on Base, settled onchain via the x402 protocol, no signup, no API key needed.

listed 2026-07-25 · no on-chain settlement recorded yet

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 3h ago

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

reliability 100%

uptime 24h: -
uptime 7d: -
uptime 30d: -
uptime 90d: -
response p95: 77ms
avg response: 77ms
total checks: 1

compliance A (11/11)

11 of 11 x402 conformance checks pass. Full checklist below.

jump to compliance checklist

price $0.001 to $0.02 (p14 in Data)

price (min): $0.001
price (max): $0.02
category percentile (min): p14 in Data
category percentile (max): p47 in Data
endpoints / prices: 5 / 4
model: tiered
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: 5d
registrar: Cloudflare, Inc.
hosting: custom
domain created: 2026-07-19

Identity facts, not a risk score.

traction $0 30d · 0 buyers

volume 30d: $0
buyers 30d: 0
settlements 30d: 0
first settlement: ---
last settlement: ---
top buyer share: -
trend 7d vs 30d: -
networks: eip155:8453
volume all-time: $0
settlements all-time: 0
median settlement 30d: $0
max settlement 30d: $0
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

Mart402 provides APIs for data extraction, parsing, verification, and structured data retrieval from various sources including web pages, PDFs, and Japanese company profiles.

category: data-extraction
in: query params
auth: none

data-extractionpdf-parsingverificationstructured-dataweb-scrapingocrjp-company

AI-generated summary. The measured data is never altered by it.

ENDPOINTS

Service endpoints with HTTP method, path, description, pricing, and network
METHOD	PATH	DESCRIPTION	PRICE	NETWORK	ASSET
GET	/v1/extract	mart402 extract	$0.002	Base	USDC
GET	/v1/jp-company	mart402 jp-company	$0.02	Base	USDC
GET	/v1/parse	mart402 parse (per page, quote first)	$0.004	Base	USDC
GET	/v1/structured	mart402 structured	$0.02	Base	USDC
GET	/v1/verify	mart402 verify	$0.001	Base	USDC

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",
        "scheme": "exact",
        "network": "base",
        "mimeType": "application/json",
        "resource": "https://mart402.com/v1/extract",
        "description": "mart402 extract",
        "maxAmountRequired": "2000",
        "maxTimeoutSeconds": 120
      }
    ],
    "x402Version": 1
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xE3244a21D0d68bFa78b7CAd8C3b8777aDFbB3188",
        "scheme": "exact",
        "network": "base",
        "mimeType": "application/json",
        "resource": "https://mart402.com/v1/parse",
        "description": "mart402 parse (per page, quote first)",
        "maxAmountRequired": "4000",
        "maxTimeoutSeconds": 120
      }
    ],
    "x402Version": 1
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xE3244a21D0d68bFa78b7CAd8C3b8777aDFbB3188",
        "scheme": "exact",
        "network": "base",
        "mimeType": "application/json",
        "resource": "https://mart402.com/v1/verify",
        "description": "mart402 verify",
        "maxAmountRequired": "1000",
        "maxTimeoutSeconds": 120
      }
    ],
    "x402Version": 1
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xE3244a21D0d68bFa78b7CAd8C3b8777aDFbB3188",
        "scheme": "exact",
        "network": "base",
        "mimeType": "application/json",
        "resource": "https://mart402.com/v1/structured",
        "description": "mart402 structured",
        "maxAmountRequired": "20000",
        "maxTimeoutSeconds": 120
      }
    ],
    "x402Version": 1
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xE3244a21D0d68bFa78b7CAd8C3b8777aDFbB3188",
        "scheme": "exact",
        "network": "base",
        "mimeType": "application/json",
        "resource": "https://mart402.com/v1/jp-company",
        "description": "mart402 jp-company",
        "maxAmountRequired": "20000",
        "maxTimeoutSeconds": 120
      }
    ],
    "x402Version": 1
  }
]

OVER TIME

All charts share the 24h window selected here. 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

24h UPTIME 100%

RESPONSE TIME

AVG RESP 77ms

PRICE (captured 402, USD)

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

SUB-SCORES (uptime + x402 compliance)

VOLUME (on-chain settlement, USD)

DISTINCT BUYERS

COMPLIANCE

11/11 checks pass · grade A

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

SITE PILLARS

homepage reachable
openapi doc
pricing page
llms.txt
robots.txt
terms page

recent checks (13) · click to expand

TIME STATUS RESP

17:57:00 UTC ● SLOW 182ms

17:41:00 UTC ● OK 64ms

17:25:00 UTC ● OK 89ms

17:09:00 UTC ● OK 81ms

16:53:00 UTC ● OK 75ms

16:37:00 UTC ● OK 22ms

16:21:00 UTC ● SLOW 156ms

16:05:00 UTC ● OK 30ms

15:49:00 UTC ● OK 46ms

15:33:00 UTC ● OK 112ms

15:17:00 UTC ● OK 21ms

15:01:00 UTC ● OK 41ms

14:45:00 UTC ● OK 77ms

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

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  <img src="https://x402-list.com/badge/mart402.svg" alt="Mart402 listed on x402-list" height="28">
</a>

// Markdown

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// 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 ]