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Wolfram Language has many functions that fetch data from online sources. Without access to the internet, these functions might not work as intended. Firewalls and proxy servers may deny Wolfram Language access to online data. Knowing the URLs that it uses allows you to configure any firewalls or proxies to grant access to online data.

Most of Wolfram Language’s online functions, including natural language queries, need:

• www.wolfram.com
• www.wolframalpha.com
• dataserver.wolfram.com
• pacletserver.wolfram.com

 
Wolfram Cloud–related functionality, the Wolfram Data Repository, the Wolfram Function Repository, the Wolfram Neural Net Repository, Wolfram Chat services, the Wolfram Resource System, as well as functions like WebSearch, WebImageSearch and TextTranslation access one or several of the following when invoked:

• www.wolframcloud.com
• datadrop.wolframcloud.com
• datarepository.wolframcloud.com
• resources.wolframcloud.com
• channelbroker.wolframcloud.com

 
The ExternalEvaluate functionality needs:

• files.wolframcdn.com

 
The GeoGraphics and AstroGraphics functionality need:

• geo.wolfram.com

 
Astronomical computation needs:

• naif.jpl.nasa.gov/pub/naif

 
The function ProteinData needs:

• www.rcsb.org

 
The on-demand licensing functionality needs:

• cloudlm-api.wolfram.com (port 443)
• cloudlm.wolfram.com (port 16286)

 
The LLM-related functionalities used in Chat Notebooks and functions like LLMFunction,
LLMSynthesize and ImageSynthesize need access to one or several of the following when invoked:

Aleph Alpha

• api.aleph-alpha.com

 
Anthropic

• api.anthropic.com/v1

 
Cohere

• api.cohere.ai

 
DeepSeek

• api.deepseek.com

 
Gemini

• generativelanguage.googleapis.com

 
Groq

• api.groq.com

 
Mistral AI

• api.mistral.ai

 
OpenAI

• api.openai.com/v1

 
Together AI

• api.together.xyz

 
Functions that perform web operations, like URLRead and URLExecute, require access to the URL that is called. Connected services functions accessed via ServiceConnect require access to the respective service/API domain.