Discover / chainstate.schemasure.com

ChainState

□ No challenge detected

Profile a Base address in one call instead of four to six lookups. Returns contract or externally owned plus code size, proxy detection across all seven slot layouts including the legacy OpenZeppelin slot Base USDC uses, the resolved implementation, ERC-165 and behavioural ERC-20 detection, token metadata, requested ERC-20 balances, and denylist hits. Answers unknown rather than guessing, and null rather than false when a contract stays silent. Not a guarantee that an address is safe.

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://chainstate.schemasure.com/v1/chain/state
# 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://chainstate.schemasure.com/v1/chain/state$0.02Profile a Base address in one call instead of four to six lookups. Returns contract or externally owned plus code size, proxy detection across all seven slot layouts including the legacy OpenZeppelin slot Base USDC uses, the resolved implementation, ERC-165 and behavioural ERC-20 detection, token metadata, requested ERC-20 balances, and denylist hits. Answers unknown rather than guessing, and null rather than false when a contract stays silent. Not a guarantee that an address is safe.

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/chainstate.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	232ms
15 Oct, 08:20 UTC	No challenge detected	404	317ms
13 Oct, 20:45 UTC	No challenge detected	404	209ms
11 Oct, 19:34 UTC	No challenge detected	404	149ms
10 Oct, 03:32 UTC	No challenge detected	404	163ms
8 Oct, 21:32 UTC	No challenge detected	404	162ms
7 Oct, 15:42 UTC	No challenge detected	404	188ms
6 Oct, 15:31 UTC	No challenge detected	404	179ms
28 Sept, 05:02 UTC	No challenge detected	404	147ms

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 ChainState?

Its listed price is $0.02.

What payment terms does ChainState 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 ChainState listed?

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

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