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Connect without authentication

This connector calls the public NCBI E-utilities API, which requires no credentials. Anonymous access is limited to 3 requests/second per IP address — enough for most integrations. There is nothing to obtain from NCBI to connect.

1

Create the connection

Choose the No Authentication option and create the connection in StackOne Hub. There are no fields to fill in — no API key, username, or password is required. StackOne begins calling the E-utilities API immediately.

2

Enable higher throughput (optional)

If you need higher throughput, NCBI offers a free API key that raises the limit to 10 requests/second. To use it, create the connection with the API Key authentication option instead of No Authentication, and follow that option’s guide to generate a key.

  • NCBI’s usage guidelines state: Without an API key, any site (IP address) posting more than 3 requests per second to the E-utilities will receive an error message. By including an API key, a site can post up to 10 requests per second by default.
  • You can review the full rules on the NCBI E-utilities usage guidelines page.
  • An API key is created from your NCBI account settings — sign up or sign in at the NCBI account page.
NCBI E-utilities usage guidelines page highlighting the 3 vs 10 requests-per-second rate limits

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Linking the Account from the Hub

1

Navigate to the Hub

Use one of the three Linking Account Methods to access the Hub.
2

Connect

  • Click Connect
  • If applicable, the provider will redirect you to a sign-in or authorization page. Complete the provider’s authorization flow.
  • Once authorization is successful, you will see a confirmation popup

If the account linking is successful, you will see the newly linked account in your Accounts page.