●

Mart402

Data PAYMENT-READY

payment-ready until 2026-09-13

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.

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

VERDICT

ranking generation 3

strong 96/100 #10 of 265 in Data by measured score

What the score read on this service: status online, 100% uptime 30d, 429ms response p95, x402 compliance 14 of 14, $0.005 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 Data, 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 265 listings, this one among them. That set is wider than the 265 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 DATA

Other Data 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
Clink Forge	strong	98	98.6%	---
WhaleTape	strong	98	97.4%	---
ThirdMade Shelf	strong	98	100%	---
AgentToll	strong	98	100%	---
Japan Transit API	strong	97	99.1%	---

5 of 264 other ranked services in Data · see the whole category

ASSESSMENT

updated 6h 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: 99.9%
response p95: 429ms
avg response: 208ms
total checks: 2,708

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 (p40 in Data)

price (min): $0.005
price (max): $0.03
category percentile (min): p40 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 ---

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.

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 price changed 28d ago (1 in 30d)

price changed · 28d 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

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 100%

RESPONSE TIME

AVG RESP 208ms

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)

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

14/14 checks pass · grade A

last 402 captured 2026-08-09 · last up 2026-09-06

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

12:11:23 UTC ● OK 172ms

11:55:25 UTC ● OK 163ms

11:39:23 UTC ● OK 88ms

11:23:20 UTC ● OK 116ms

11:07:22 UTC ● OK 129ms

10:51:25 UTC ● OK 136ms

10:35:20 UTC ● OK 140ms

10:19:22 UTC ● OK 120ms

10:03:22 UTC ● OK 202ms

09:47:22 UTC ● OK 126ms

09:31:21 UTC ● OK 106ms

09:15:16 UTC ● OK 149ms

08:59:21 UTC ● OK 138ms

08:43:22 UTC ● OK 122ms

08:27:20 UTC ● OK 171ms

08:11:25 UTC ● OK 144ms

07:55:20 UTC ● OK 303ms

07:39:20 UTC ● OK 97ms

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.