geocode.address
Forward geocoding — free-text address or place name → latitude/longitude plus structured address components (houseNumber, road, suburb, city, county, state, postcode, country, countryCode). Query: q (2-500 chars), limit (1-10, default 5), country (optional 2-letter ISO 3166-1 bias). Underlying data is OpenStreetMap (ODbL). Sister: /api/geocode/reverse.
price
$0.0010 USDC per call
method
GET
/api/geocode/addresspayment
x402 v2 · EIP-3009 transferWithAuthorization · USDC on Base mainnet
auth
None. Sign the payment, retry with
PAYMENT-SIGNATURE.tier
Tier 0 — no paid upstream
Parameters
| Name | Type | Description |
|---|---|---|
qrequired | string | min 2 chars · max 500 chars |
limit | integer | min 1 · max 10 |
country | string | match ^[a-z]{2}$ |
Code samples
cURLbash
# 1. Probe with no auth → 402 envelope with PaymentRequirements curl -sS 'https://2s.io/api/geocode/address?q=xx&limit=5&country=example' # 2. Sign + retry with PAYMENT-SIGNATURE: curl -sS 'https://2s.io/api/geocode/address?q=xx&limit=5&country=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/geocode/address?q=xx&limit=5&country=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.geocode.address({
"q": "xx",
"limit": 5,
"country": "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.geocode.address(q="xx", limit=5, country="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": "geocode.address",
"arguments": {
"q": "xx",
"limit": 5,
"country": "example"
}
}
}LangChain agent — langchain-twosiopython
# pip install langchain-twosio langchain-anthropic
import os
from langchain_twosio import get_twosio_tools
from langchain_anthropic import ChatAnthropic
from langgraph.prebuilt import create_react_agent
tools = get_twosio_tools(private_key=os.environ["EVM_PRIVATE_KEY"])
llm = ChatAnthropic(model="claude-haiku-4-5", temperature=0)
agent = create_react_agent(llm, tools)
# The agent will pick "twosio_geocode_address" when the prompt matches.
result = agent.invoke({
"messages": [("user", "...prompt that requires geocode.address...")]
})
print(result["messages"][-1].content)LlamaIndex agent — llama-index-tools-twosiopython
# pip install llama-index-tools-twosio llama-index-llms-anthropic
import asyncio, os
from llama_index_tools_twosio import get_twosio_tools
from llama_index.llms.anthropic import Anthropic
from llama_index.core.agent.workflow import FunctionAgent
tools = get_twosio_tools(private_key=os.environ["EVM_PRIVATE_KEY"])
llm = Anthropic(model="claude-haiku-4-5")
agent = FunctionAgent(tools=tools, llm=llm)
# The agent will pick "twosio_geocode_address" when the prompt matches.
response = asyncio.run(agent.run("...prompt that requires geocode.address..."))
print(response)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.