Service overview
Pre-sign security verdict for autonomous agents: before an agent SIGNS and settles a transaction, get an allow/warn/block verdict with reasons. Decodes the calldata to catch UNLIMITED approvals (spender can drain the token without further signatures), and cross-checks the token (honeypot, mintable, pausable, hidden owner, blacklist, buy/sell tax via GoPlus) and the spender/recipient (phishing, blacklist, sanctions via GoPlus address-security + Chainalysis + TRM). Use it as a last-mile guard before approving a token or signing a tx. Ed25519-signed provenance. 0.015 USDC on Base. POST {"chain":"base","to":"0x..","data":"0x.."} to verify a tx before signing, or {"chain":"base","token":"0x.."} to verify a token before approving.
Level up your agent by giving it access to thousands of services. All payable per-request via x402. No API keys, no accounts.
Paste into your agentic chat and let your agent guide you.
npx awal x402 pay "https://presign.hergertsynthora.com/service" \
--method POST \
--data '{
"chain": "{chain}",
"data": "{data}",
"to": "{to}"
}'{
"endpoint": "POST /service",
"paid": true,
"query": "example input",
"result": {
"value": "Structured response from the service."
}
}API surface
1 crawlable route
| Parameter | Type | Default | Example |
|---|---|---|---|
chain | string | null | base |
data | string | null | 0x095ea7b30000000000000000000000001111111111111111111111111111111111111111ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff |
to | string | null | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 |
FAQ
Service
CuseTheJuice mailbox @ mail.cusethejuice.com — change mailbox password (current password + new_password in JSON). Agents: pay with x402 (Base USDC), POST JSON using fields from extensions.bazaar on the 402. Full catalog, examples, human flows: https://mail.cusethejuice.com/machine-mail.html · Find every route: Coinbase CDP x402 merchant discovery (payTo).
Service
NFT metadata, traits, and image URI for any ERC721 or ERC1155 token - fetched via eth_call with IPFS resolution (OneSource live Ethereum RPC)
Service
Agent-driven wallet due diligence — multi-step investigation, signed markdown report + JSON sidecar, dual-chain anchored. Async — returns job_id; poll /v1/investigate/status/{job_id} for the deliverable. ETA 5-10 min. $1.77 USDC.