Akashic corpus + Laya routing. Anonymous read; free signup in-band.
Free
One server, in memory & knowledge. Akashic corpus + Laya routing. Anonymous read; free signup in-band.
Memory & Knowledge
Akashic corpus + Laya routing. Anonymous read; free signup in-band.
The rest either hold an API key issued by the publisher or ask for nothing.
Listed without a verification tick. Read the listing before installing.