How do you attach a clasp to a choker made with seed beads on a bead loom?

"How about adding clasps? A little tricky. You can tie off the warp against the beads, gather all the threads, string them through a clasp and knot them, then turn them under the piece and hide them with backing. The method I use the most often requires a bit of forethought. At the top of the piece, I weave about an inch of beads unrelated to my pattern. At the end, I weave the woof a bit, knot the ends and glue the knots, then turn under. Then I glue on a small square of hooked Velcro. (I later sew it to the piece for good measure.) At the end where I wove that extra inch of beads, I also knot and glue, but I lay the warp on top of the piece and secure the looped side of the Velcro."

For more on this technique, see the link to Beltana's beads

I couldn't figure how to answer, so i just edited.. this is my first time=).

What I usually do is add a crimp bead (4$ a pack at Jo-Anns) , then the clasp, go back through the crimp bead the way you came out, squish it, and trim end, then add a TINY amount of bead glue.

Works best with a toggle clasp=)