search.web

Live web search. Returns ranked results with title, URL, snippet description, site name, and page age — fresh information past any model training cutoff. Supports count (1-20), offset for paging, country (2-letter, e.g. US), freshness (pd=past day, pw=past week, pm=past month, py=past year, or a YYYY-MM-DDtoYYYY-MM-DD range), and safesearch (off/moderate/strict). Use for current events, fact verification, finding documentation, and research. Independent search index. For news-specific results with sources and timestamps see /api/news/search.

price

$0.0090 USDC per call

method

GET/api/search/web

payment

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

auth

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

tier

Tier 2 — LLM/render upstream included

Parameters

Name	Type	Description
`q`required	string	Search query. min 1 chars · max 400 chars
`count`	integer	min 1 · max 20
`offset`	integer	min 0 · max 9
`country`	string	match ^[a-zA-Z]{2}$
`freshness`	string	match ^(pd\|pw\|pm\|py\|\d{4}-\d{2}-\d{2}to\d{4}-\d{2}-\d{2})$
`safesearch`	string	one of: off \| moderate \| strict

Code samples

cURLbash

# 1. Probe with no auth → 402 envelope with PaymentRequirements
curl -sS 'https://2s.io/api/search/web?q=example&count=10&offset=0&country=example&freshness=2024-01-01&safesearch=off'

# 2. Sign + retry with PAYMENT-SIGNATURE:
curl -sS 'https://2s.io/api/search/web?q=example&count=10&offset=0&country=example&freshness=2024-01-01&safesearch=off' \
  -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/search/web?q=example&count=10&offset=0&country=example&freshness=2024-01-01&safesearch=off'

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.search.web({
  "q": "example",
  "count": 10,
  "offset": 0,
  "country": "example",
  "freshness": "2024-01-01",
  "safesearch": "off"
})

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.search.web(q="example", count=10, offset=0, country="example", freshness="2024-01-01", safesearch="off")

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": "search.web",
    "arguments": {
      "q": "example",
      "count": 10,
      "offset": 0,
      "country": "example",
      "freshness": "2024-01-01",
      "safesearch": "off"
    }
  }
}

Response

Field	Type	Description
`query`	string
`count`	number
`moreAvailable`	boolean	True when another offset page exists.
`results`	array
`source`	object

Example response datajson

{
  "query": "example",
  "count": 1,
  "moreAvailable": false,
  "results": [
    {
      "title": "example",
      "url": "example",
      "description": "example",
      "siteName": "example",
      "age": "example",
      "language": "example"
    }
  ],
  "source": {
    "provider": "example",
    "url": "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.