Discover / api.pennyforge.org

sendcheck

□ No challenge detected

SendCheck deep scan: the same verification across all 5 chains (Base, Ethereum, Arbitrum, Optimism, Polygon) incl. wrong-network detection. POST {address, chain}

x402
Base
USDC
Verification

Listed price: $0.05
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://api.pennyforge.org/deep
# 402 Payment Required: pay with an x402 client (USDC on Base),
# then send the same request again with the payment attached.

2 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.

Base URLhttps://api.pennyforge.org

POST/check$0.01SendCheck: pre-send verification of any EVM address on one chain (EIP-55 checksum, wallet-vs-contract, outgoing activity, balances, verdict). POST {address, chain}
POST/deep$0.05SendCheck deep scan: the same verification across all 5 chains (Base, Ethereum, Arbitrum, Optimism, Polygon) incl. wrong-network detection. POST {address, chain}

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

Showing 2 of 2 listed endpoints.

Agents can find it through the Superstables MCP server and JSON API: GET /api/v1/services/api.pennyforge.org

Recent checks

29 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	405	372ms
15 Oct, 08:20 UTC	No challenge detected	405	246ms
13 Oct, 20:45 UTC	No challenge detected	405	257ms
11 Oct, 19:34 UTC	No challenge detected	405	184ms
10 Oct, 03:32 UTC	No challenge detected	405	66ms
8 Oct, 21:32 UTC	No challenge detected	405	192ms
7 Oct, 15:42 UTC	No challenge detected	405	80ms
6 Oct, 15:31 UTC	No challenge detected	405	250ms
29 Sept, 05:02 UTC	No challenge detected	405	57ms

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 sendcheck?

Its listed price is $0.05.

What payment terms does sendcheck 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 sendcheck listed?

In x402 Bazaar and x402-list.com. Superstables first indexed it on 26 Sept 2026.

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