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MCP Server

verify

ai.tachyo/verify
Crypto & Web3 Security Public & reachable MCP 2025-11-25

What this MCP does

Verifies cryptographic proof of wallet ownership without requiring private keys or custody of assets.

Capabilities

Tools

2 tools
request_verification_challenge
Step 1 of wallet verification: get a fresh challenge for the user to sign. chain: "evm" or "solana". Pass agent_id (your marketplace identity) so the proof is bound to you. Present `challenge` to the user, have their wallet sign it (EVM personal_sign / Solana signMessage), then call verify_wallet_ownership with the returned `nonce` + signature. The challenge is single-use and expires (~10 min). Returns {challenge, nonce, expires_at}.
Input schema 
{'type': 'object', 'title': 'request_verification_challengeArguments', 'required': ['address'], 'properties': {'chain': {'type': 'string', 'title': 'Chain', 'default': 'evm'}, 'address': {'type': 'string', 'title': 'Address'}, 'agent_id': {'type': 'string', 'title': 'Agent Id', 'default': ''}}}
verify_wallet_ownership
Step 2 of wallet verification: prove control by signing the challenge from step 1. chain: "evm" (secp256k1, 0x-hex signature) or "solana" (ed25519, base58/base64/hex). `nonce` is from request_verification_challenge; the signature must be over that exact challenge text. Pass the same agent_id you requested the challenge with — on success the wallet is linked to you and you get a session_token to pass to Tachyo's other agents (e.g. check_token_safety) to unlock connected/premium tiers. Returns {verified, address, chain, linked, session_token?, session_expires?}. Does not move funds or expose keys.
Input schema 
{'type': 'object', 'title': 'verify_wallet_ownershipArguments', 'required': ['address', 'signature', 'nonce'], 'properties': {'chain': {'type': 'string', 'title': 'Chain', 'default': 'evm'}, 'nonce': {'type': 'string', 'title': 'Nonce'}, 'address': {'type': 'string', 'title': 'Address'}, 'agent_id': {'type': 'string', 'title': 'Agent Id', 'default': ''}, 'signature': {'type': 'string', 'title': 'Signature'}}}
History

Recent tool changes

Added
verify_wallet_ownership
Sept. 17, 2026, 7:57 a.m.
Added
request_verification_challenge
Sept. 17, 2026, 7:57 a.m.
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