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At a glance

  • Availability: Experimental (how to enable).
  • Authentication: API key.
  • Connection: The key from POLYGON_API_KEY is sent as the Bearer prefixed Authorization header.
  • Provider documentation: Authentication reference.

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Credentials

Set these per environment. See Connect an integration.

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Setup

  1. Create an account: Sign up at https://massive.com (Polygon.io is now Massive). The free Basic plan works for testing: it includes end-of-day stock data, 2 years of history, and 5 API calls per minute.
  2. Copy your API key: Open https://massive.com/dashboard/keys and copy the API key shown for your account. Existing Polygon.io keys keep working.
  3. Store the key: Set the key as POLYGON_API_KEY. It is sent as an Authorization: Bearer header on every request.
  4. Verify access: Call the Get Previous Close tool with a ticker like AAPL. A 401 means the key is invalid; a 429 means you hit the 5 requests/minute limit on the free plan.

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Provider notes

  • Polygon.io was renamed to Massive in October 2025; api.polygon.io and api.massive.com run in parallel and accept the same keys, so this connector’s api.polygon.io endpoints continue to work.
  • All five tools are available on the free Basic plan; data recency depends on your plan (end-of-day on Basic, 15-minute delayed on Starter/Developer, real-time on Advanced).
  • The free Basic plan is limited to 5 API calls per minute; exceeding it returns HTTP 429.
Provider API reference.

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Tools

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Verify the connection

Call a read tool such as polygon__get_aggregates with arguments for your account. Confirm that the result comes from the intended account or workspace before enabling write tools.