treg.to / Catalog / Polygon.io
6 tools · your own account · never metered

Polygon.io MCP for AI agents

US stocks, options, indices, forex and crypto — real-time and deep history, tick-level. Connect your own Polygon.io account once and your agent uses it from then on, through one treg.to token. Calls on your own connection are never metered.
Start freeSee all 6 toolsAPI docs ↗
$1.00 of free credit on every new team · no provider signup · no card
6 of 6 tools on this page are live-verified against the provider.
works in
ChatGPTClaudeClaude CodeCodexCursorGrokGemini CLI
What your agent can now do

Polygon.io, one prompt away

AGENT
ChatGPTClaudeClaude CodeCodexCursorGrokGemini CLI
end-of-day price history for a ticker✓
latest end-of-day prices✓
find tickers and the exchanges they trade on✓
→
▚ treg
$ treg call polygon.prev-close
✓ 200 · own account
$ treg call polygon.aggs.range
✓ 200 · own account
$ treg call polygon.market.status
✓ 200 · own account
$ _
→
Polygon.ioYOUR ACCOUNT
US stocks, options, indices, forex and crypto — real-time and deep history, tick-level.
⚒ 6 TOOLS

Market data · https://api.polygon.io

Set up

Set up Polygon.io in Claude Code, Codex or any agent

1Give this to your agent
in your agent's chat
set up treg — https://treg.to/llms.txt
2Or add the MCP server yourself
claude code
claude mcp add --transport http treg https://treg.to/mcp

ChatGPT

Settings → Connectors → add https://treg.to/mcp as a custom connector.

Grok bot

Add https://treg.to/mcp as a remote MCP connector in its tool settings.

Claude Desktop

Settings → Connectors → Add custom connector → https://treg.to/mcp.

Cursor, Codex, any MCP client

Point it at https://treg.to/mcp (HTTP transport).

CLI

curl -fsSL https://treg.to/install.sh | sh

Plain HTTP

LangChain, CrewAI or any code: /call/<tool-id> with a Bearer token. No SDK.

Try it

What's the best way to ask?

the prompt
Using treg, end-of-day price history for a ticker. Show me the price first.

Run one directly

a live-verified call
curl -H "Authorization: Bearer $TREG_TOKEN" \
  "https://treg.to/call/polygon.prev-close"
Why treg.to

Why call Polygon.io through treg.to

Your account, held safely

Connect once; treg.to keeps the credential server-side and injects it per call. No key on any machine.

Price before the call

The provider's own rate, $0.000 markup. How billing works.

No subscription, no seats

Charged per call. $1.00 free per new team, no card to start.

Your own Polygon.io key is free

Register it and those calls are never metered. Your key always wins.

Switch by changing a word

Another provider is a different word in the prompt, not a new integration.

One key, the whole catalog

The same token calls EODHD, Finnhub, Marketstack and ~2,600 other tools.

The shelf

All 6 Polygon.io tools

Stock Market Data · 6 tools
  • Previous close by stock ticker — prior day OHLCV bar · live-verified · own account
    The prior trading day's open/high/low/close/volume bar for one ticker polygon.prev-close
  • Stock OHLCV bars by ticker and date range, any interval · live-verified · own account
    OHLCV bars for a ticker at any granularity (minute to year) over a date range — Polygon's workhorse endpoint polygon.aggs.range
  • Daily open and close by stock ticker on one date · live-verified · own account
    One ticker's open, close, high, low, volume and after-hours prices on one date polygon.daily.open-close
  • Search stock and crypto tickers by symbol or name · live-verified · own account
    Search Polygon's reference directory of tickers by symbol or name, filtered by market and type polygon.tickers.search
  • Company details by stock ticker — market cap, listing date · live-verified · own account
    Company details behind a ticker: name, market cap, listing date, SIC classification, homepage polygon.ticker.details
  • US stock market open or closed right now · live-verified · own account
    Whether US markets and each exchange are open, closed or in extended hours at this moment polygon.market.status

Reliability badges come from live traffic through treg.to, not a controlled benchmark.

Related

Same jobs, other providers

These providers answer some of the same capabilities as Polygon.io. The platform pages show them on one row with rate and coverage; choosing is yours, treg.to does not route between providers automatically.

also on the catalog
EODHDFinnhubMarketstackTiingoTwelve Data
Questions

Before you start

Do I need a Polygon.io account?

Yes. This is an own-account connection: you sign in to Polygon.io once and your agent uses that connection through your treg.to token. Calls on it are never metered.

How do I add Polygon.io to Claude Code?

Run: claude mcp add --transport http treg https://treg.to/mcp — one MCP server carries Polygon.io and the rest of the catalog.

Which frameworks does it work with?

Anything that speaks MCP (Claude Code, Claude Desktop, ChatGPT, Codex, Cursor, Grok) and anything that can make an HTTP request (LangChain, CrewAI, LlamaIndex, plain code).

Is this the official Polygon.io MCP server?

No. treg.to serves Polygon.io's real API through its own metered proxy: the request is the provider's own, the credential is injected server-side, and the answer is relayed verbatim. The official Polygon.io channels are linked above.