Verify a US trademark by USPTO serial number (8 digits) or registration number. Returns the word mark, LIVE/DEAD status with the detailed status description and date, filing and registration dates, current owner (name, entity type, citizenship), mark type (trademark / service mark / certification mark), standard-character flag, abandonment date when applicable, and the international classes covered with their descriptions. Authoritative real-time USPTO data — confirm a mark exists and is active before relying on it for clearance, licensing, or due-diligence work. Lookup is by number only (no text search); siblings: /api/patents/search, /api/law/case-verify.
/api/law/trademark-statusPAYMENT-SIGNATURE.The trademark status API is a pay-per-call law endpoint built for AI agents and autonomous software. Verify a US trademark by USPTO serial number (8 digits) or registration number.
There is no signup and no API key. An agent (or any HTTP client) hits the endpoint, receives an x402 "402 Payment Required" challenge, signs a sub-cent USDC payment on Base or Solana, and retries — the data comes back on the paid request. That makes it a drop-in trademark status data source for an agent tool-use loop, an MCP host, or a backend that needs law data on demand without onboarding to yet another vendor portal.
| Name | Type | Description |
|---|---|---|
serialNumber | string | match ^\d{8}$ |
registrationNumber | string | match ^\d{6,8}$ |
# 1. Probe with no auth → 402 envelope with PaymentRequirements curl -sS 'https://2s.io/api/law/trademark-status?serialNumber=12345®istrationNumber=12345' # 2. Sign + retry with PAYMENT-SIGNATURE: curl -sS 'https://2s.io/api/law/trademark-status?serialNumber=12345®istrationNumber=12345' \ -H 'PAYMENT-SIGNATURE: <base64-json-payload>' # Or use the canonical runner (handles probe → sign → retry): # EVM_PRIVATE_KEY=0x... node --env-file=.env.local \ # --experimental-strip-types scripts/x402-pay.ts \ # 'https://2s.io/api/law/trademark-status?serialNumber=12345®istrationNumber=12345'
import { TwoS } from '@2sio/sdk'
const client = new TwoS({
privateKey: process.env.EVM_PRIVATE_KEY as `0x${string}`,
})
const result = await client.law.trademarkStatus({
"serialNumber": "12345",
"registrationNumber": "12345"
})
console.log('endpoint:', result.endpoint)
console.log('cost:', result.costUsd, 'USDC')
console.log('tx:', result.settlement?.txHash)
console.log('data:', result.data)import os
from twosio import TwoS
client = TwoS(private_key=os.environ["EVM_PRIVATE_KEY"])
result = client.law.trademark_status(serialNumber="12345", registrationNumber="12345")
print("endpoint:", result.endpoint)
print("cost:", result.cost_usd, "USDC")
print("tx:", (result.settlement or {}).get("tx_hash"))
print("data:", result.data)// 1. Add @2sio/mcp to your MCP host config (Claude Desktop example below).
// EVM_PRIVATE_KEY funds x402 payments per call.
// claude_desktop_config.json
{
"mcpServers": {
"2sio": {
"command": "npx",
"args": ["-y", "@2sio/mcp"],
"env": { "EVM_PRIVATE_KEY": "0x..." }
}
}
}
// 2. Once the server is running, agents call this tool via standard MCP:
{
"jsonrpc": "2.0",
"id": 1,
"method": "tools/call",
"params": {
"name": "law.trademark-status",
"arguments": {
"serialNumber": "12345",
"registrationNumber": "12345"
}
}
}| Field | Type | Description |
|---|---|---|
ok | boolean | one of: true |
items | array | |
total | integer | Total matching rows upstream; null when unknown. |
source | object |
{
"ok": true,
"items": [
{
"serialNumber": "example",
"registrationNumber": "example",
"registrationDate": "example",
"filingDate": "example",
"mark": "example",
"live": false,
"statusCode": 1,
"statusDescription": "example",
"statusDetail": "example",
"statusDate": "example",
"dateAbandoned": "example",
"markType": "example",
"standardCharacterMark": false,
"supplementalRegister": false,
"owner": {
"name": "example",
"entityType": "example",
"partyType": "example",
"citizenship": "example"
},
"classes": [
{
"internationalCode": "example",
"description": "example",
"status": "example"
}
],
"url": "example"
}
],
"total": 1,
"source": {
"provider": "example",
"url": "example",
"license": "example"
}
}