If “see site” or a link is given, visit the link for the guidelines (these are often complicated).
This list is primarily geared toward fantasy. However, most fantasy agents also accept science fiction.
Visiting the agent’s site is a good idea. This will help you see if your work is something the agent might be looking for, and help you tailor your query to each recipient. Sending a mass query to 80 different agents is not recommended.
Some listed agents are not actively seeking SF&F specifically. These are listed as “Not Fantasy Specific.” They merely used verbiage on their pages to suggest they might be open to the genre.
This list is updated sporadically. To ensure the compatibility of your submissions to the agent’s current requirements, I recommend visiting their sites and not sending any queries blind. Some of the agents may even be closed to submissions.
Feel free to contact me if you notice anything that is now incorrect, or have an agent to add. I will be more than happy to update the list for future users!