law.trademark-search

Search US trademarks by wordmark text, owner name, or goods/services — the text search the USPTO offers no public API for. Pass `query` for full-text search (ranked best-match first), or `serial` / `registrationNumber` for an exact record. Filter with `field` (mark|owner|all), `status` (live=registered+pending only, default; all=includes dead/abandoned), and `intlClass` (Nice class, e.g. 9). Returns each mark's wordmark, serial, registration number, status (+ live flag), filing/registration/abandonment dates, owner, international classes, and goods/services. Corpus: USPTO full trademark register (public domain). Use law.trademark-status for live USPTO prosecution detail on a known serial.

price

$0.0024 USDC per call

method

GET/api/law/trademark-search

payment

x402 v2 · USDC on Base (EIP-3009) or Solana (SPL transfer)

auth

None. Sign the payment, retry with PAYMENT-SIGNATURE.

tier

Tier 0 — no paid upstream

Parameters

Name	Type	Description
`query`	string	min 1 chars · max 200 chars
`serial`	string	match ^\d{6,9}$
`registrationNumber`	string	match ^[0-9 ]{1,10}$
`field`	string	one of: mark \| owner \| all
`status`	string	one of: live \| all
`intlClass`	string	match ^0*\d{1,3}$
`limit`	integer	min 1 · max 100
`offset`	integer	min 0

Code samples

cURLbash

# 1. Probe with no auth → 402 envelope with PaymentRequirements
curl -sS 'https://2s.io/api/law/trademark-search?query=example&serial=12345&registrationNumber=example&field=mark&status=live&intlClass=example&limit=1&offset=0'

# 2. Sign + retry with PAYMENT-SIGNATURE:
curl -sS 'https://2s.io/api/law/trademark-search?query=example&serial=12345&registrationNumber=example&field=mark&status=live&intlClass=example&limit=1&offset=0' \
  -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-search?query=example&serial=12345&registrationNumber=example&field=mark&status=live&intlClass=example&limit=1&offset=0'

TypeScript / Node — @2sio/sdktypescript

import { TwoS } from '@2sio/sdk'

const client = new TwoS({
  privateKey: process.env.EVM_PRIVATE_KEY as `0x${string}`,
})

const result = await client.law.trademarkSearch({
  "query": "example",
  "serial": "12345",
  "registrationNumber": "example",
  "field": "mark",
  "status": "live",
  "intlClass": "example",
  "limit": 1,
  "offset": 0
})

console.log('endpoint:', result.endpoint)
console.log('cost:', result.costUsd, 'USDC')
console.log('tx:', result.settlement?.txHash)
console.log('data:', result.data)

Python — 2siopython

import os
from twosio import TwoS

client = TwoS(private_key=os.environ["EVM_PRIVATE_KEY"])

result = client.law.trademark_search(query="example", serial="12345", registrationNumber="example", field="mark", status="live", intlClass="example", limit=1, offset=0)

print("endpoint:", result.endpoint)
print("cost:", result.cost_usd, "USDC")
print("tx:", (result.settlement or {}).get("tx_hash"))
print("data:", result.data)

MCP — Claude Desktop / AgentKit / any MCP hostjson

// 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-search",
    "arguments": {
      "query": "example",
      "serial": "12345",
      "registrationNumber": "example",
      "field": "mark",
      "status": "live",
      "intlClass": "example",
      "limit": 1,
      "offset": 0
    }
  }
}

Response

Field	Type	Description
`ok`	boolean	one of: true
`items`	array
`total`	integer	Total matching rows upstream; null when unknown.
`source`	object
`page`	object

Example response datajson

{
  "ok": true,
  "items": [
    {
      "serialNumber": "example",
      "registrationNumber": "example",
      "markText": "example",
      "status": {
        "code": "example",
        "label": "example",
        "date": "example",
        "live": false
      },
      "filingDate": "example",
      "registrationDate": "example",
      "abandonmentDate": "example",
      "cancellationDate": "example",
      "renewalDate": "example",
      "owner": "example",
      "intlClasses": [
        "example"
      ],
      "goodsServices": "example",
      "markDrawingCode": "example"
    }
  ],
  "total": 1,
  "source": {
    "provider": "example",
    "url": "example",
    "license": "example"
  },
  "page": {
    "number": 1,
    "size": 1,
    "pages": 1
  }
}

Discovery

/api/directory — full catalog of every endpoint
/openapi.json — OpenAPI 3.1 spec (per-op x-payment-info, x402Payment security)
/.well-known/x402 — machine-readable service descriptor for x402-aware crawlers
/.well-known/mcp/server-card.json — MCP SEP-1649 server card
/llms.txt — plain-text manifest for LLM ingestion

2s.io is x402-native. Every call is paid per-request from a USDC-funded EVM wallet on Base — no signup, no API keys, no monthly fees. Source code: github.com/2s-io/sdk.