$0.01
per call · USD Coin on Base
Validate EIP-712 typed structured data and derive its domain separator, message hash, and signing digest.
Endpoint
POST https://apiacre.com/v1/crypto/typed-data-hash2
Calls / 30d
1
Unique payers / 30d
Sep 1
Last called
exact
Payment scheme
Call this service
import { wrapFetchWithPayment } from "@x402/fetch";
import { privateKeyToAccount } from "viem/accounts";
const account = privateKeyToAccount(process.env.PRIVATE_KEY);
const fetchWithPay = wrapFetchWithPayment(fetch, account);
const res = await fetchWithPay("https://apiacre.com/v1/crypto/typed-data-hash", {
method: "POST",
headers: { "Content-Type": "application/json" },
body: JSON.stringify({
"typed_data": {
"domain": {
"name": "API Acre Example"
},
"message": {
"contents": "Hello"
},
"primaryType": "Message",
"types": {
"EIP712Domain": [
{
"name": "name",
"type": "string"
}
],
"Message": [
{
"name": "contents",
"type": "string"
}
]
}
}
}),
});
const data = await res.json();curl -X POST \
"https://apiacre.com/v1/crypto/typed-data-hash" \
-H "Content-Type: application/json" \
-d '{"typed_data":{"domain":{"name":"API Acre Example"},"message":{"contents":"Hello"},"primaryType":"Message","types":{"EIP712Domain":[{"name":"name","type":"string"}],"Message":[{"name":"contents","type":"string"}]}}}' \
-H "X-PAYMENT: <signed x402 payment>"Example response
{
"data": {
"domainSeparator": "0xc167959bdf834486717879a8cd6eb3e12a864d1b1d7dbcecec40455e1b4bc8c8",
"messageHash": "0xd6a9eadbfb49313d8b83d02d2bb22b916a5b16e6006946c9ca6fa7959d934b3a",
"primaryType": "Message",
"signingHash": "0x7433e410d5f2857cb42d0bfd31bc71e8aa553f02ce0eed397927f01dfb46424c",
"valid": true
},
"meta": {
"cached": false,
"duration_ms": 42,
"next_actions": [],
"sources": [],
"warnings": []
},
"request_id": "018f1f54-7f38-7ba2-8dc3-5f90272d9f1a",
"service": "crypto.typed-data-hash",
"version": "1"
}Payment details
0xa0bfa4f07281c9b248dc3aed2217836bca24869bUSD Coin · 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913Is this your API?
Pin it to the top of Onchain Data and the homepage with a featured placement.
More from API Acre & similar services
API Acre · Crypto Base Network Status
apiacre.com
Read the latest Base mainnet block and a bounded EIP-1559 fee history in one RPC batch, including gas utilization and priority-fee percentile samples.
API Acre · WEB Metadata
apiacre.com
Extract webpage metadata from one public URL: page title, meta description, canonical URL, headings, hreflang, icons, feeds, Open Graph, Twitter Cards, and JSON-LD Schema.org types, with redirect and response provenance plus privacy-safe, publisher-asserted Organization facts with field evidence.
API Acre · Data Schema
apiacre.com
Create and generate a nested JSON Schema Draft 2020-12 contract by inferring field types and required fields from representative JSON, CSV, TSV, JSON Lines, or YAML records, with equivalent CSV/TSV numeric and null inference, input evidence, and non-enforcing observed bounds.