Quackr
Virtual phone numbers for SMS verification, OTP receipt, and number management.
A growing index of tools and services. Search across protocols, with the source always in view.
Virtual phone numbers for SMS verification, OTP receipt, and number management.
Batch commitments and Bitcoin timestamp verification. Public documentation; submissions require operator authorization and existing quotas.
Paid agent trust checks, receipt verification, research, data work, and monitoring.
Fair-price checks, leaderboards, and Ed25519 receipt verification for x402/MPP services.
Verifiable entropy, provably-fair games, and receipt verification for AI agents (FairSeal API).
Hand off AI work with a signed Verification Receipt — an independent verifier proves it runs.
Japanese invoice/receipt OCR + tax registration-number (T-number) verification, via x402.
Finds, filters, and verifies local-business leads; every email carries a verification receipt.
Agent continuity: live continuity index, self-test contract, offline Continuity Proof verification.
Sign Ethereum messages - EIP-191, EIP-712 typed data, Permit2, signature verification and recovery
Dispatch human-execution tasks with proof verification, local checks, and compliance reviews.
Python MCP server: fair-price checks, leaderboards, Ed25519 receipt verification for x402/MPP.