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Polygon.io for AI agents

Polygon.io delivers real-time and historical market data across stocks, options, forex, and crypto for building financial applications. Developers and analysts use it as their market data feed. Connect it once through Arc0, and your agent, or Claude, ChatGPT and Cursor, can use it through one MCP endpoint, limited to what each user approved.

Connect Polygon.ioSee the 60 actions ↓
AnalyticsAPI keyMCP + RESTpolygon.io
AUDIT LOG · POLYGON.IOPOLICY: acme-support
09:41:07 · claude · u_8f2read
polygon_io.list_filings
List SEC Filings✓ allowed · 212ms
09:41:08 · claude · u_8f2read
polygon_io.get_ema
Get Exponential Moving Average✓ allowed · 164ms
09:41:09 · claude · u_8f2write
polygon_io.polygon_last_quote_for_a_symbol
Last Quote for a Symbol✓ approved · approved by user
09:41:12 · claude · u_8f2destructive
polygon_io.get_daily_open_close
Get Daily Open/Close✕ blocked · policy: deny
EVERY POLYGON.IO CALL, ON THE RECORD
01 · USE CASES

What agents do in Polygon.io.

01

Check market status read-only

Look up whether markets are open before scheduling a data pull or trading alert.

02

Get grouped daily market summary

Pull a full market's daily summary to spot the day's biggest movers.

03

Check IPO data

Look up recent IPO data read-only as part of a market research report.

02 · ACTIONS

60 Polygon.io actions, graded by risk.

Every Polygon.io action is tagged read, write or destructive, so one policy covers the whole app and new actions inherit the right default.

read

56

Look things up. Allowed by default.

  • polygon_io.get_ema
    Get Exponential Moving Average
  • polygon_io.get_rsi
    Get RSI
  • polygon_io.get_sma
    Get Simple Moving Average
  • polygon_io.get_macd
    Get MACD
  • polygon_io.get_news
    Get News
  • polygon_io.get_filing
    Get SEC Filing
  • polygon_io.get_splits
    Get Splits
  • polygon_io.get_ipo_data
    Get IPO Data
  • polygon_io.list_filings
    List SEC Filings
  • polygon_io.get_dividends
    Get Dividends
  • polygon_io.get_forex_ema
    Get Forex EMA
  • polygon_io.get_forex_rsi
    Get Forex RSI
  • polygon_io.get_forex_sma
    Get Forex SMA
  • polygon_io.get_crypto_ema
    Get Crypto EMA
  • polygon_io.get_crypto_rsi
    Get Crypto RSI
  • polygon_io.get_crypto_sma
    Get Crypto SMA
+ 40 MORE

write

2

Create and change things. Allow, or ask the user first.

  • polygon_io.polygon_last_quote_for_a_symbol
    Last Quote for a Symbol
  • polygon_io.polygon_last_trade_for_a_currency_pair
    Last Trade for a Currency Pair

destructive

2

Delete, cancel or archive. Ask first, or deny outright.

  • polygon_io.get_daily_open_close
    Get Daily Open/Close
  • polygon_io.get_crypto_open_close
    Get Crypto Open/Close
03 · HOW IT WORKS

Polygon.io in three steps.

  1. 01Your users connect Polygon.ioThey add their Polygon.io api key on Arc0 Connect, under your brand. It goes straight into the vault.
  2. 02You set the rulesReads run, writes like “last Quote for a Symbol” can wait for the user, and “get Daily Open/Close” can be denied outright.
  3. 03Any agent can actYour agent calls Polygon.io through the Arc0 SDK or MCP, and so can Claude, ChatGPT and Cursor. Every call lands on the audit log.
POLICY.TS
await arc0.policies.set('polygon_io', {
  read: 'allow',
  write: 'ask',        // polygon_last_quote_for_a_symbol
  destructive: 'deny',  // get_daily_open_close
})

# Claude Code: the same connection, one URL
$ claude mcp add --transport http arc0 \
    https://mcp.arc0.ai/u/u_8f2
04 · AUTH AND DATA

How Polygon.io connects.

Users add their Polygon.io api key on Arc0 Connect. It is encrypted in the vault, never shown to the model, and each user can rotate or revoke it at any time.

The same Polygon.io connection serves your agent over MCP and your own backend over REST and the proxy, so a user connects once. How Arc0 handles credentials →

AUTH
API key
CREDENTIALS
Per-tenant encrypted vault
MODEL SEES
Results only, never credentials
AUDIT LOG
Every call, on every plan
05 · WORKS WITH

Use Polygon.io from any agent.

Claude
ChatGPT
Cursor
Codex
VS Code
OpenAI Agents SDK
Claude Agent SDK
Vercel AI SDK
Mastra
LangGraph
06 · RELATED

More analytics apps.

Gong58 actionsSerpApi59 actionsPeople Data Labs27 actionsPostHog507 actions21risk8 actionsAkta19 actionsAlpha Vantage56 actionsAmplitude54 actions
ALL ANALYTICS APPS →
07 · FAQ

Polygon.io and Arc0, answered.

Q01

Can I use Polygon.io with Claude, ChatGPT or Cursor?

Yes. Connect Polygon.io to Arc0 once, then add your Arc0 MCP URL to Claude, ChatGPT, Cursor, Claude Code or any other remote-MCP client. Each assistant only gets the Polygon.io actions you allow.

Q02

How do users connect Polygon.io?

Users add their Polygon.io api key on Arc0 Connect. It is encrypted in the vault, never shown to the model, and each user can rotate or revoke it at any time.

Q03

Which Polygon.io actions can my agent take?

60 in total: 56 read, 2 write and 2 destructive, such as “last Quote for a Symbol”. Your policies decide which of them each agent may call.

Q04

Can I stop my agent from deleting things in Polygon.io?

Yes. Actions like “get Daily Open/Close” are graded destructive. Set destructive actions to deny, or to ask so the user approves each one, and blocked calls still show up on the audit log.

Q05

Can my own backend call Polygon.io too?

Yes. The same Polygon.io connection is available over REST and through the Arc0 proxy, so your product and your agent share one connection per user.

Get started

Plug Polygon.io into your agent.

Your users connect Polygon.io once, under your brand. Your agent gets 60 actions behind your policies, with every call on the record.

Connect Polygon.ioBrowse all apps →

Free to build · MCP + REST · Audit log on every plan