Discover / txguard.schemasure.com

TxGuard

□ No challenge detected

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 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.

x402
Base
USDC

Listed price: $0.02
Challenge detected: 0 of the last 9 checks
Last checked: 16 Oct, 18:49 UTC
In our index since: 26 Sept 2026

Endpoint

curl -i https://txguard.schemasure.com/v1/tx/preflight
# 402 Payment Required: pay with an x402 client (USDC on Base),
# then send the same request again with the payment attached.

1 listed endpoints · on x402 Bazaar

Checks and payment terms on this page refer to the endpoint above. Other listed endpoints have not been checked individually.

POSThttps://txguard.schemasure.com/v1/tx/preflight$0.02Explain 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.

A dash means the listing gives no price or method. Copy buttons copy the full URL.

Showing 1 of 1 listed endpoints.

Agents can find it through the Superstables MCP server and JSON API: GET /api/v1/services/txguard.schemasure.com

Recent checks

28 Sept 2026One bar per check, showing up to 20 recent checks. Coloured bars show relative response time, with a minimum visible height; full-height grey bars mean no challenge was detected. “Challenge detected” means HTTP 402 or another detected payment-challenge signal.16 Oct 2026

All 9 checks

When (UTC)	Result	HTTP	Response
16 Oct, 18:49 UTC	No challenge detected	404	244ms
15 Oct, 08:20 UTC	No challenge detected	404	222ms
13 Oct, 20:45 UTC	No challenge detected	404	151ms
11 Oct, 19:34 UTC	No challenge detected	404	189ms
10 Oct, 03:32 UTC	No challenge detected	404	187ms
8 Oct, 21:32 UTC	No challenge detected	404	207ms
7 Oct, 15:42 UTC	No challenge detected	404	189ms
6 Oct, 15:31 UTC	No challenge detected	404	255ms
28 Sept, 05:02 UTC	No challenge detected	404	141ms

Questions

Did our last probe detect a payment challenge?

No. At our last probe on 16 Oct, 18:49 UTC, we detected no payment challenge.

What price is recorded for TxGuard?

Its listed price is $0.02.

What payment terms does TxGuard advertise?

The listing advertises x402, Base and USDC. It names cdp as its facilitator. Check the seller's current payment challenge and authentication requirements before paying.

Where is TxGuard listed?

In x402 Bazaar. Superstables first indexed it on 26 Sept 2026.

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