useterra.app / Catalog / Polygon.io
6 tools · your own account · never metered

Polygon.io: connect your own account

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 useterra.app token. Calls on your own connection are never metered.
Start freeSee all 6 toolsAPI docs ↗
$1.00 of free credit once per new verified account · no card · platform tools need no provider signup
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✓
→
▚ terra
$ terra call polygon.prev-close
✓ 200 · own account
$ terra call polygon.aggs.range
✓ 200 · own account
$ terra 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 terra — https://useterra.app/llms.txt
2Or add the MCP server yourself
claude code
claude mcp add --transport http terra https://useterra.app/mcp

ChatGPT

Settings → Connectors → add https://useterra.app/mcp as a custom connector.

Grok bot

Add https://useterra.app/mcp as a remote MCP connector in its tool settings.

Claude Desktop

Settings → Connectors → Add custom connector → https://useterra.app/mcp.

Cursor, Codex, any MCP client

Point it at https://useterra.app/mcp (HTTP transport).

CLI

curl -fsSL https://useterra.app/install.sh | sh

Plain HTTP

LangChain, CrewAI or any code: /call/<tool-id> + X-Terra-Token: <token>. No SDK.

Try it

What's the best way to ask?

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

Run one directly

a live-verified call
terra call polygon.prev-close --query ticker=AAPL
Why useterra.app

Why call Polygon.io through useterra.app

Your account, held safely

Connect once; useterra.app 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.

Account billing

Calls through your own connection are not metered by terra.

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 Crawl4AI, EODHD, Financial Datasets and 3,535 other tools.

The shelf

All 6 Polygon.io tools

Stock Market Data · 6 tools
  • Stock OHLCV bars by ticker and date range, any interval · BYOK only · live-verified · No terra charge; upstream own account
    OHLCV bars for a ticker at any granularity (minute to year) over a date range — Polygon's workhorse endpoint polygon.aggs.range
    included in the subscriber's own plan (flat subscription, no per-call price); terra publishes no rate, so this serves own-key only
  • Daily open and close by stock ticker on one date · BYOK only · live-verified · No terra charge; upstream own account
    One ticker's open, close, high, low, volume and after-hours prices on one date polygon.daily.open-close
    included in the subscriber's own plan (flat subscription, no per-call price); terra publishes no rate, so this serves own-key only
  • US stock market open or closed right now · BYOK only · live-verified · No terra charge; upstream own account
    Whether US markets and each exchange are open, closed or in extended hours at this moment polygon.market.status
    included in the subscriber's own plan (flat subscription, no per-call price); terra publishes no rate, so this serves own-key only
  • Previous close by stock ticker — prior day OHLCV bar · BYOK only · live-verified · No terra charge; upstream own account
    The prior trading day's open/high/low/close/volume bar for one ticker polygon.prev-close
    included in the subscriber's own plan (flat subscription, no per-call price); terra publishes no rate, so this serves own-key only
  • Company details by stock ticker — market cap, listing date · BYOK only · live-verified · No terra charge; upstream own account
    Company details behind a ticker: name, market cap, listing date, SIC classification, homepage polygon.ticker.details
    included in the subscriber's own plan (flat subscription, no per-call price); terra publishes no rate, so this serves own-key only
  • Search stock and crypto tickers by symbol or name · BYOK only · live-verified · No terra charge; upstream own account
    Search Polygon's reference directory of tickers by symbol or name, filtered by market and type polygon.tickers.search
    included in the subscriber's own plan (flat subscription, no per-call price); terra publishes no rate, so this serves own-key only

Reliability badges come from live traffic through useterra.app. Live-verified means a successful provider check; it does not verify every request variant.

Used in

Jobs Polygon.io does, compared with the other providers

Historical stock data API: daily OHLCV price history by ticker, free to try, then your own Polygon, EODHD or Marketstack key

Every provider that does this job, side by side: price per billing unit, measured success rate and speed.

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, useterra.app does not route between providers automatically.

also on the catalog
Crawl4AIEODHDFinancial DatasetsFinnhubMarketstackTiingoTwelve 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 useterra.app token. Calls on it are never metered.

How do I add Polygon.io to Claude Code?

Run: claude mcp add --transport http terra https://useterra.app/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. useterra.app 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.