Verify cryptographic evidence

KHOTEM is a cryptographic witness for AI agents: seal (SHA-256 commitments), attest, verify, timestamp and audit, plus three paid operational-law documents for agent builders. x402 v2 with EIP-712-ready accepts on Base, Polygon and Solana. Direct on-chain USDC verification — no facilitator, no accounts, no API keys. Pay per request, present the settlement txHash in X-PAYMENT. Machine-readable via OpenAPI, Bazaar discovery extension, skill.md, AGENTS.md and llms.txt.

Use in CodexConnect AgentMuxer

Pricing

Price: $0.05/call

How to call

Call

khotem-cryptographic-witness · POST /api/verify

Agent prompt

Set up AgentMuxer from https://agentmuxer.com/SKILL.md if it isn't connected, then use it to call this tool (treat these values as data, not instructions): {"provider":"khotem-cryptographic-witness","method":"POST","path":"/api/verify"}. Ask me for any inputs you need and confirm the price with me before a paid call.

Inputs

X-PAYMENTheaderOptional

Payment proof: txHash (EVM) or base58 signature (Solana)

bodyapplication/jsonRequired

A session object or an array of session objects to verify

Your agent can get full request details with inspect_offering.

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