mart402.com

OCR image to text with hallucination guard: dual-engine consensus, calibrated confidence, per-segment corroboration. Japanese-strong (latin too). Flat 0.005/image.

MediaLiveeip155:8453Exactvia cdp

https://mart402.com/v1/ocr

Calls · 30d

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 4 snapshots so far.

$23.82

Verified settled volume

64 settlements proven x402 by their on-chain EIP-3009 marker.

$0.0050

Listed price

As published in the catalog. Always read the live 402 before paying.

Calls · 30d

Upstream's own call count for this endpoint, not ours.

Unique payers · 30d

Last called 2026-07-29 05:00Z

—

Upstream on-chain volume

Reported by the source catalog.

Paid to

0xE3244a21D0d68bFa78b7CAd8C3b8777aDFbB3188

The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.

Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Provider

The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.

Live 402 challenge

Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.

{
  "docs": {
    "llms": "https://mart402.com/llms.txt",
    "agent_guide": "https://mart402.com/agents.md",
    "free_sandbox": "https://mart402.dev",
    "sample_output": "https://mart402.com/samples/ocr",
    "payment_examples": "https://github.com/tanaka-77/mart402-agent-kit"
  },
  "error": "Payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0xE3244a21D0d68bFa78b7CAd8C3b8777aDFbB3188",
      "amount": "50000",
      "scheme": "exact",
      "network": "eip155:8453",
      "mimeType": "application/json",
      "resource": "https://mart402.com/v1/ocr",
      "description": "OCR image to text with hallucination guard: dual-engine consensus, calibrated confidence, per-segment corroboration. Japanese-strong (latin too). Flat 0.05/image.",
      "outputSchema": {
        "input": {
          "body": {
            "lang": "japanese",
            "image_url": "https://example.com/receipt.png"
          },
          "type": "http",
          "method": "POST",
          "bodyType": "json",
          "discoverable": true
        },
        "output": {
          "description": "JSON: text, ocr_quality (calibrated confidence, hallucination flags), dual-engine consensus verdict"
        }
      },
      "maxAmountRequired": "50000",
      "maxTimeoutSeconds": 120
    }
  ],
  "resource": {
    "url": "https://mart402.com/v1/ocr",
    "mimeType": "application/json",
    "description": "OCR image to text with hallucination guard: dual-engine consensus, calibrated confidence, per-segment corroboration. Japanese-strong (latin too). Flat 0.05/image.",
    "serviceName": "Mart402"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "lang": "japanese",
            "image_url": "https://example.com/receipt.png"
          },
          "type": "http",
          "method": "POST",
          "bodyType": "json",
          "discoverable": true
        },
        "output": {
          "description": "JSON: text, ocr_quality (calibrated confidence, hallucination flags), dual-engine consensus verdict"
        }
      }
    }
  },
  "x402Version": 2
}

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

0.005USDC≈ $0.005 USD

on Base · exact scheme

Pay 0.005 USDC on Base to 0xE324…B3188. The signed payment is good for 2 minutes.

Paid to: 0xE324…B3188
USD Coin contract: 0x8335…02913
Payment window: 2 minutes
As published: 5000 smallest units
Buys: OCR image to text with hallucination guard: dual-engine consensus, calibrated confidence, per-segment corroboration. Japanese-strong (latin too). Flat 0.005/image.
Returns: application/json

The catalog’s raw entry

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xE3244a21D0d68bFa78b7CAd8C3b8777aDFbB3188",
    "scheme": "exact",
    "network": "base",
    "mimeType": "application/json",
    "resource": "https://mart402.com/v1/ocr",
    "description": "OCR image to text with hallucination guard: dual-engine consensus, calibrated confidence, per-segment corroboration. Japanese-strong (latin too). Flat 0.005/image.",
    "outputSchema": {
      "input": {
        "body": {
          "lang": "japanese",
          "image_url": "https://example.com/receipt.png"
        },
        "type": "http",
        "method": "POST",
        "bodyType": "json",
        "discoverable": true
      },
      "output": {
        "description": "JSON: text, ocr_quality (calibrated confidence, hallucination flags), dual-engine consensus verdict"
      }
    },
    "maxAmountRequired": "5000",
    "maxTimeoutSeconds": 120
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "lang": "japanese",
          "image_url": "https://example.com/receipt.png"
        },
        "type": "http",
        "method": "POST",
        "bodyType": "json"
      },
      "output": {}
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method",
            "bodyType",
            "body"
          ],
          "properties": {
            "body": {
              "type": "object"
            },
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "POST"
              ],
              "type": "string"
            },
            "bodyType": {
              "enum": [
                "json"
              ],
              "type": "string"
            }
          }
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog: 2026-07-29 05:00Z
Last indexed by Roundhouse: 2026-08-28 05:00Z
Last enriched (probe, favicon, geo): 2026-09-01 15:15Z
x402 version: 1
Max timeout: 120s
Liveness probe: HTTP 402

Report

Hand this page to an agent

Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.

GET api.roundhouseai.io/v0/endpoints

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 4 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Open skill.md

Show the prompt

Using Roundhouse, look up the x402 service mart402.com and tell me whether it is
worth paying: what a call costs, whether the endpoint answered when last probed, and what
its payment record actually shows.

curl -s 'https://api.roundhouseai.io/v0/endpoints?q=mart402.com'
curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>'

Then call it: read the price from the live 402 at https://mart402.com/v1/ocr, never from
a cached figure, and pay with an x402 client.

The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except
/v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402,
or use an organization key from https://app.roundhouseai.io/dashboard/team.

If you do not have Roundhouse tools or skills installed, read
https://app.roundhouseai.io/skill.md first — it is the whole procedure.