timezone.lookup

Resolve a coordinate to its IANA timezone and return the current UTC offset, local wall time, DST status, and short abbreviation. Query: lat (-90..90), lon (-180..180), at (optional ISO 8601 instant; defaults to now). Returns { tz, abbreviation, offsetMinutes, offsetHours, localTime, observesDst, isDst, januaryOffsetMinutes, julyOffsetMinutes, instant, source }. Polygon lookup against a CC0 timezone boundary index; offsets and DST come from the runtime tzdata so transition rules stay current. Use when scheduling for a coordinate, converting timestamps to local wall time, or checking whether a location is currently observing daylight saving.

price

$0.0010 USDC per call

method

GET/api/timezone/lookup

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
`lat`required	number	Latitude in degrees, -90..90. min -90 · max 90
`lon`required	number	Longitude in degrees, -180..180. min -180 · max 180
`at`	string	Optional ISO 8601 instant. Defaults to the current server time. date-time

Code samples

cURLbash

# 1. Probe with no auth → 402 envelope with PaymentRequirements
curl -sS 'https://2s.io/api/timezone/lookup?lat=-90&lon=-180&at=example'

# 2. Sign + retry with PAYMENT-SIGNATURE:
curl -sS 'https://2s.io/api/timezone/lookup?lat=-90&lon=-180&at=example' \
  -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/timezone/lookup?lat=-90&lon=-180&at=example'

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.timezone.lookup({
  "lat": -90,
  "lon": -180,
  "at": "example"
})

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.timezone.lookup(lat=-90, lon=-180, at="example")

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": "timezone.lookup",
    "arguments": {
      "lat": -90,
      "lon": -180,
      "at": "example"
    }
  }
}

Response

Field	Type	Description
`tz`	string	IANA timezone identifier — e.g. "America/Los_Angeles".
`abbreviation`	string	Short timezone abbreviation at `instant` — e.g. "PDT", "JST".
`offsetMinutes`	integer	UTC offset at `instant`, in signed minutes.
`offsetHours`	number	UTC offset at `instant`, in signed hours (may be fractional for 30/45-minute zones).
`localTime`	string	ISO 8601 local wall time with offset suffix — e.g. "2026-06-03T08:43:15-07:00".
`observesDst`	boolean	True if this zone has different offsets across the year.
`isDst`	boolean	True if `instant` falls inside a DST/summer-shift period for this zone.
`januaryOffsetMinutes`	integer	Offset on Jan 15 of `instant`'s year — representative northern-hemisphere winter.
`julyOffsetMinutes`	integer	Offset on Jul 15 of `instant`'s year — representative northern-hemisphere summer.
`instant`	string	UTC instant the lookup was computed at (echoed `at`, or current server time).
`source`	object

Example response datajson

{
  "tz": "example",
  "abbreviation": "example",
  "offsetMinutes": 1,
  "offsetHours": 1,
  "localTime": "example",
  "observesDst": false,
  "isDst": false,
  "januaryOffsetMinutes": 1,
  "julyOffsetMinutes": 1,
  "instant": "example",
  "source": {
    "provider": "example",
    "license": "example",
    "url": "example",
    "note": "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.