Discover / goodsong.dev

realcite-citation

□ No challenge detected

Verify a citation: does it exist, is it retracted, and do the given title/authors/year/journal match the canonical record? Checked against Crossref (retraction data included) with OpenAlex as a fallback when no DOI is given.

x402
Base
USDC

Listed price: $0.005
Challenge detected: 0 of the last check
Last checked: 14 Oct, 18:06 UTC
In our index since: 14 Oct 2026

Endpoint

curl -i https://goodsong.dev/verify/citation
# 402 Payment Required: pay with an x402 client (USDC on Base),
# then send the same request again with the payment attached.

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

Recent checks

14 Oct 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.14 Oct 2026

All 1 checks

When (UTC)	Result	HTTP	Response
14 Oct, 18:06 UTC	No challenge detected	404	71ms

Questions

Did our last probe detect a payment challenge?

No. At our last probe on 14 Oct, 18:06 UTC, we detected no payment challenge.

What price is recorded for realcite-citation?

Its listed price is $0.005.

What payment terms does realcite-citation 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 realcite-citation listed?

In x402 Bazaar. Superstables first indexed it on 14 Oct 2026.

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