tools · Listed · eip155:8453 · Found · 2 endpoints · Not used for Gateway
txguard.schemasure.com
txguard.schemasure.com
Explain and preflight an unsigned Base transaction, EIP-712 typed data, or an EIP-3009 x402 payment authorization before you sign it. Decodes intent against ver
Not used for Gateway
Listed — live manifest, not yet verified · not used for Gateway Still catalogued — dead/unreachable knowledge is index value. (Listed — live manifest, not yet verified · not used for Gateway)
Indexed from this operator's public /.well-known/x402.json. Found is not operator-owned and is not attested. Claim or opt out.
Agent Read · Cleared Index
CAUTION
Unverified preflight decoder with no settlement history or identity proof
confidence
67%
source
elevated
Index before you pay. Same payload for agents:
GET /api/cleared/agent-read?slug=cat-txguard-schemasure-com
When to call
- Before signing any unsigned Base transaction, EIP-712 typed data, or EIP-3009 x402 payment authorization when you need a second opinion on intent decoding
- When you want to verify that a payment authorization matches the quote it claims to pay (recipient, amount, asset, chain, freshness, nonce replay)
- During manual review of a transaction where selector ambiguity could hide a malicious call
Risks
- Operator identity is unverified — no proof of who runs the endpoint
- Endpoint did not respond during automated checks, so live availability is uncertain
- Zero settlement history and zero routing volume — no evidence of real-world usage or reliability
- Service explicitly disclaims any guarantee of safety or profitability — you bear full signing risk
Price posture
low
Category · Gateway
Transaction preflight and intent decoding tool for Base chain, targeting agents and humans who need to understand what they're signing before they sign it. Fills a niche for x402 payment authorization validation.
Endpoint hints
POST /v1/tx/preflightSubmit an unsigned Base transaction, EIP-712 typed data, or EIP-3009 x402 payment authorization for decoding and preflight checks. Returns intent classification, proxy resolution,
GET /v1/tx/preflightFree endpoint — likely returns documentation or status information. Use to test basic reachability before committing to a paid call.
Evidence (Cleared)
- → Intake listed · not used for Gateway
- → Trust 55/100 · fail · tier listed
- → Protocol x402 · eip155:8453
- → Manifest reachable · schema valid
- → Found listing — indexed from public x402.json, not operator-attested.
Endpoints
Explain and preflight an unsigned Base transaction, EIP-712 typed data, or an EI
$0.01POST https://txguard.schemasure.com/v1/tx/preflightExplain and preflight an unsigned Base transaction, EIP-712 typed data, or an EIP-3009 x402 payment authorization before you sign it. Decodes intent against verified ABIs, resolves proxies, classifies approvals, and checks a payment authorization against the quote it claims to pay: recipient, amount, asset, chain, freshness, and nonce replay. Returns unknown rather than guessing when a selector is ambiguous. Not a guarantee that a transaction is safe or profitable.
https://txguard.schemasure.com/v1/tx/preflight
$0.00GET https://txguard.schemasure.com/v1/tx/preflightChecks
reachable
valid
2026-08-25T06:46:55.588Z
Intake listed · Listed — live manifest, not yet verified · not used for Gateway · probed 0/2 · No settlement evidence found in chain signals.
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