ToolVet
80trust / 100

Extract

by SchemaSure in Search & web

x402 APIPassing, checked 2 h ago

Extract strict, JSON-Schema-valid typed JSON from unstructured text or HTML. Failed extraction calls are not settled. Primary x402 V2 API for production agents.

POST
https://schemasure.com/v2/extract
Price
$0.02
per call in USDC
Uptime
100%
last 30 days
Response time
381 ms
549 ms slowest 5%
Last check
Passed
2 h ago, next any minute now

Run a free test callHow to call it

Reliability

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Status and outage history · Atom feed · Watch with other listings

How to call it

POST https://schemasure.com/v2/extract

Each call costs $0.02 in USDC on Base, paid with the request over x402.

Run a free test callOne unpaid request, the way an agent sends it. You see the payment challenge it gets back. Nothing is charged.

Example request

From the listing.

POST https://schemasure.com/v2/extract
content-type: application/json

{
  "input": "Invoice #A-1042 — Acme Corp. Total due: $1,299.00 USD on 2026-08-01.",
  "schema": {
    "additionalProperties": false,
    "properties": {
      "currency": {
        "enum": [
          "USD",
          "EUR",
          "GBP"
        ],
        "type": "string"
      },
      "dueDate": {
        "format": "date",
        "type": "string"
      },
      "invoiceNumber": {
        "type": "string"
      },
      "total": {
        "type": "number"
      }
    },
    "required": [
      "invoiceNumber",
      "total",
      "currency",
      "dueDate"
    ],
    "type": "object"
  }
}

Parameters

ParameterTypeRequiredDescription
inputstringYesRaw unstructured content to extract from (plain text or HTML).
inputTypestringNoHow to interpret `input`: plain text, HTML, or auto-detect (default). One of: text, html, auto. Default: "auto".
optionsobjectNo
schemaobjectYesJSON Schema (draft 2020-12) that the returned `data` is guaranteed to satisfy.

Example response

The provider's example. We can't check it without paying.

{
  "data": {
    "currency": "USD",
    "dueDate": "2026-08-01",
    "invoiceNumber": "A-1042",
    "total": 1299
  },
  "meta": {
    "latencyMs": 640,
    "repairs": 0,
    "validated": true
  }
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.02.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://schemasure.com/v2/extract' \
  -H 'content-type: application/json' \
  --data-raw '{"input":"Invoice #A-1042 \u2014 Acme Corp. Total due: $1,299.00 USD on 2026-08-01.","schema":{"additionalProperties":false,"properties":{"currency":{"enum":["USD","EUR","GBP"],"type":"string"},"dueDate":{"format":"date","type":"string"},"invoiceNumber":{"type":"string"},"total":{"type":"number"}},"required":["invoiceNumber","total","currency","dueDate"],"type":"object"}}'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - -X POST 'https://schemasure.com/v2/extract' \
  -H 'content-type: application/json' \
  --data-raw '{"input":"Invoice #A-1042 \u2014 Acme Corp. Total due: $1,299.00 USD on 2026-08-01.","schema":{"additionalProperties":false,"properties":{"currency":{"enum":["USD","EUR","GBP"],"type":"string"},"dueDate":{"format":"date","type":"string"},"invoiceNumber":{"type":"string"},"total":{"type":"number"}},"required":["invoiceNumber","total","currency","dueDate"],"type":"object"}}' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode
JavaScript: pay and call
// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.02 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.02" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.02 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fschemasure.com%2Fv2%2Fextract&method=POST
const res = await pay("https://schemasure.com/v2/extract", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "input": "Invoice #A-1042 \u2014 Acme Corp. Total due: $1,299.00 USD on 2026-08-01.",
    "schema": {
      "additionalProperties": false,
      "properties": {
        "currency": {
          "enum": [
            "USD",
            "EUR",
            "GBP"
          ],
          "type": "string"
        },
        "dueDate": {
          "format": "date",
          "type": "string"
        },
        "invoiceNumber": {
          "type": "string"
        },
        "total": {
          "type": "number"
        }
      },
      "required": [
        "invoiceNumber",
        "total",
        "currency",
        "dueDate"
      ],
      "type": "object"
    }
  }),
});
console.log(res.status, await res.text());
Python: pay and call
# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.02 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.02"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://schemasure.com/v2/extract",
        json={
            "input": "Invoice #A-1042 \u2014 Acme Corp. Total due: $1,299.00 USD on 2026-08-01.",
            "schema": {
                "additionalProperties": False,
                "properties": {
                    "currency": {
                        "enum": [
                            "USD",
                            "EUR",
                            "GBP",
                        ],
                        "type": "string",
                    },
                    "dueDate": {
                        "format": "date",
                        "type": "string",
                    },
                    "invoiceNumber": {
                        "type": "string",
                    },
                    "total": {
                        "type": "number",
                    },
                },
                "required": [
                    "invoiceNumber",
                    "total",
                    "currency",
                    "dueDate",
                ],
                "type": "object",
            },
        },
    )
    print(res.status_code, res.text)

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