realcite-citation
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.
| Host | goodsong.dev |
|---|---|
| Price | $0.005–$0.01 per call |
| Network | Base |
| Paid endpoints listed | 8 |
| Calls, last 30 days* | 24 |
| Most unique payers on one endpoint (30 days)* | 4 |
| Last paid call* | 2026-10-14 |
| Tags | citation, fact-check, dependency, hallucination, retraction, academic, package, supply-chain |
* From the public x402 Bazaar index (snapshot 2026-10-18T04:07Z); reported by the facilitator, not measured by us.
Endpoints
| URL | Method | Price |
|---|---|---|
https://goodsong.dev/verify/citationVerify a citation: does it exist, is it retracted, and do the given title/authors/year/journal match the canonical… | POST | $0.005 |
https://goodsong.dev/verify/packageVerify a package: does it exist, is it deprecated or yanked, and does it have known vulnerabilities? Checked against… | POST | $0.005 |
https://goodsong.dev/verify/urlVerify a URL: does it resolve, what's the final status and redirect chain, is it archived on the Wayback Machine, and… | POST | $0.005 |
https://goodsong.dev/verify/caseVerify a legal case citation: does it exist, and does the given case name match the canonical record? Catches a… | POST | $0.01 |
https://goodsong.dev/verify/sellerVerify an x402 seller before paying it: does it exist and respond with a well-formed 402 challenge, is its own… | POST | $0.005 |
https://goodsong.dev/verify/repoVerify a GitHub repo: does it exist, is it archived or disabled? Catches an agent recommending or depending on a repo… | POST | $0.005 |
https://goodsong.dev/verify/filingVerify an SEC filing: given a filer's CIK and a claimed accession number, does that filing actually exist, and does… | POST | $0.005 |
https://goodsong.dev/verify/drugVerify an FDA drug record: given a claim_type (approval, ndc, or recall) and its identifier, does that record actually… | POST | $0.005 |
Source: x402 Bazaar discovery API (Coinbase CDP) · Licence: Public discovery metadata; descriptions by each provider. Listed in x402 pay-per-call APIs. We list tools; we do not test, rate or endorse them.
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