license.broker

FINRA BrokerCheck lookup — every US registered broker / investment advisor (~620k current + former). Search by free-text query (name + firm) or by CRD number for a direct individual record. Each result includes CRD ID, name (with any 'doing business as' aliases), broker-check + IA scope (Active/Inactive), a hasDisclosures flag (yes/no for complaints, settlements, terminations on file), industry-start date, FINRA registration count, and current + previous employments (firm name, branch city/state, registration dates). Public per FINRA's investor-protection BrokerCheck program; pair with /api/finance/sec-filings for cross-reference.

price

$0.0012 USDC per call

method

GET/api/license/broker

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 2 chars · max 200 chars
`crd`	string	match ^\d{1,9}$
`limit`	integer	min 1 · max 50
`offset`	integer	min 0 · max 10000

Code samples

cURLbash

# 1. Probe with no auth → 402 envelope with PaymentRequirements
curl -sS 'https://2s.io/api/license/broker?query=xx&crd=12345&limit=10&offset=0'

# 2. Sign + retry with PAYMENT-SIGNATURE:
curl -sS 'https://2s.io/api/license/broker?query=xx&crd=12345&limit=10&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/license/broker?query=xx&crd=12345&limit=10&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.license.broker({
  "query": "xx",
  "crd": "12345",
  "limit": 10,
  "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.license.broker(query="xx", crd="12345", limit=10, 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": "license.broker",
    "arguments": {
      "query": "xx",
      "crd": "12345",
      "limit": 10,
      "offset": 0
    }
  }
}

Response

Field	Type	Description
`query`	object
`totalCount`	integer
`returned`	integer
`brokers`	array
`source`	object

Example response datajson

{
  "query": {
    "query": "example",
    "crd": "example",
    "limit": 1,
    "offset": 1
  },
  "totalCount": 1,
  "returned": 1,
  "brokers": [
    {
      "crd": "example",
      "firstName": "example",
      "middleName": "example",
      "lastName": "example",
      "otherNames": [
        "example"
      ],
      "bcScope": "example",
      "iaScope": "example",
      "hasDisclosures": false,
      "yearsInIndustryStart": "example",
      "finraRegistrationCount": 1,
      "employmentCount": 1,
      "currentEmployments": [
        {
          "firmId": "example",
          "firmName": "example",
          "branchCity": "example",
          "branchState": "example",
          "registrationBeginDate": "example"
        }
      ],
      "previousEmployments": [
        {
          "firmId": "example",
          "firmName": "example",
          "registrationBeginDate": "example",
          "registrationEndDate": "example"
        }
      ]
    }
  ],
  "source": {
    "provider": "example",
    "url": "https://example.com",
    "license": "example"
  }
}

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.