Peer companies for a US-listed ticker — other companies in the same sector and sub-industry, useful for comparables, relative valuation, and screening. Pass ticker (optionally grouping to control how peers are grouped); returns a ranked list of peer ticker symbols (the input symbol is usually first). Data by Finnhub.
/api/stocks/peersPAYMENT-SIGNATURE.The peers API is a pay-per-call stocks endpoint built for AI agents and autonomous software. Peer companies for a US-listed ticker — other companies in the same sector and sub-industry, useful for comparables, relative valuation, and screening.
There is no signup and no API key. An agent (or any HTTP client) hits the endpoint, receives an x402 "402 Payment Required" challenge, signs a sub-cent USDC payment on Base or Solana, and retries — the data comes back on the paid request. That makes it a drop-in peers data source for an agent tool-use loop, an MCP host, or a backend that needs stocks data on demand without onboarding to yet another vendor portal.
| Name | Type | Description |
|---|---|---|
tickerrequired | string | US-listed ticker symbol. min 1 chars · max 12 chars · match ^[A-Za-z][A-Za-z0-9.\-]{0,11}$ |
grouping | string | How to group peers. Default: sub-industry. one of: sector | industry | subIndustry |
# 1. Probe with no auth → 402 envelope with PaymentRequirements curl -sS 'https://2s.io/api/stocks/peers?ticker=example&grouping=sector' # 2. Sign + retry with PAYMENT-SIGNATURE: curl -sS 'https://2s.io/api/stocks/peers?ticker=example&grouping=sector' \ -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/stocks/peers?ticker=example&grouping=sector'
import { TwoS } from '@2sio/sdk'
const client = new TwoS({
privateKey: process.env.EVM_PRIVATE_KEY as `0x${string}`,
})
const result = await client.stocks.peers({
"ticker": "example",
"grouping": "sector"
})
console.log('endpoint:', result.endpoint)
console.log('cost:', result.costUsd, 'USDC')
console.log('tx:', result.settlement?.txHash)
console.log('data:', result.data)import os
from twosio import TwoS
client = TwoS(private_key=os.environ["EVM_PRIVATE_KEY"])
result = client.stocks.peers(ticker="example", grouping="sector")
print("endpoint:", result.endpoint)
print("cost:", result.cost_usd, "USDC")
print("tx:", (result.settlement or {}).get("tx_hash"))
print("data:", result.data)// 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": "stocks.peers",
"arguments": {
"ticker": "example",
"grouping": "sector"
}
}
}| Field | Type | Description |
|---|---|---|
ok | boolean | one of: true |
items | array | |
total | integer | Total matching rows upstream; null when unknown. |
source | object | |
meta | object |
{
"ok": true,
"items": [
{
"ticker": "example"
}
],
"total": 1,
"source": {
"provider": "example",
"url": "example",
"license": "example"
},
"meta": {
"symbol": "example"
}
}