Signed time and SHA-256 witness receipts for agents, with offline verification and x402 payment.
Free
One server, in security & testing. Signed time and SHA-256 witness receipts for agents, with offline verification and x402 payment.
Security & Testing
Signed time and SHA-256 witness receipts for agents, with offline verification and x402 payment.
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.