trade.flows

Annual international merchandise-trade flows from UN Comtrade (HS classification). Pass reporter (the country whose trade you want; ISO-2/ISO-3 like 'US'/'USA', a UN M49 number, or 'World'), optional partner (counterparty; default World), year (YYYY), flow (export|import), and commodity: 'TOTAL' (all goods, default), a specific HS code ('27', '8703'), or 'AG2'/'AG4'/'AG6' for a top-commodity breakdown at the 2/4/6-digit level. Returns trade value (USD), net weight, quantity, and the HS commodity, sorted by value. Country names are resolved from Comtrade's own reference data.

price

$0.0036 USDC per call

method

GET/api/trade/flows

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
`reporter`required	string	Reporting country: ISO-2/ISO-3 ("US"/"USA"), UN M49 number, or "World". min 2 chars · max 40 chars
`partner`	string	Partner/counterparty country (same formats). Default "World" (all partners aggregated). min 2 chars · max 40 chars
`year`required	string	Calendar year (YYYY). Comtrade annual data typically lags ~6-12 months. match ^\d{4}$
`flow`	string	Trade direction from the reporter's perspective. Default export. one of: export \| import
`commodity`	string	"TOTAL" (all goods, default), a specific HS code ("27", "8703"), or "AG2"/"AG4"/"AG6" for a top-commodity breakdown. min 2 chars · max 8 chars
`limit`	integer	Max rows to return (1-100), sorted by trade value desc. Default 25. min 1 · max 100

Code samples

cURLbash

# 1. Probe with no auth → 402 envelope with PaymentRequirements
curl -sS 'https://2s.io/api/trade/flows?reporter=xx&partner=World&year=12345&flow=export&commodity=TOTAL&limit=25'

# 2. Sign + retry with PAYMENT-SIGNATURE:
curl -sS 'https://2s.io/api/trade/flows?reporter=xx&partner=World&year=12345&flow=export&commodity=TOTAL&limit=25' \
  -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/trade/flows?reporter=xx&partner=World&year=12345&flow=export&commodity=TOTAL&limit=25'

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.trade.flows({
  "reporter": "xx",
  "partner": "World",
  "year": "12345",
  "flow": "export",
  "commodity": "TOTAL",
  "limit": 25
})

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.trade.flows(reporter="xx", partner="World", year="12345", flow="export", commodity="TOTAL", limit=25)

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": "trade.flows",
    "arguments": {
      "reporter": "xx",
      "partner": "World",
      "year": "12345",
      "flow": "export",
      "commodity": "TOTAL",
      "limit": 25
    }
  }
}

Response

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

Example response datajson

{
  "ok": true,
  "items": [
    {
      "reporter": "example",
      "reporterIso": "example",
      "partner": "example",
      "partnerIso": "example",
      "flow": "example",
      "period": "example",
      "commodityCode": "example",
      "commodity": "example",
      "valueUsd": 1,
      "netWeightKg": 1,
      "quantity": 1,
      "quantityUnit": "example"
    }
  ],
  "total": 1,
  "source": {
    "provider": "example",
    "url": "example",
    "license": "example"
  },
  "meta": {
    "query": {
      "reporter": "example",
      "reporterCode": 1,
      "partner": "example",
      "partnerCode": 1,
      "year": "example",
      "flow": "example",
      "commodity": "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.