{"uid":"cap_EWT2DXkoNMpfCELLKaJJs","slug":"evidence402-doi-citation-verifier-27229fce","name":"Evidence402 DOI Citation Verifier","description":"Read public webpages, extract structured data and verify DOI citations. No buyer API key or subscription. Pay per call with x402 USDC on Base.","url":"https://evidence402.onrender.com/api/v1/verify?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":null,"responseSchema":{"type":"json","example":{"data":{"citations":[]},"service":"Evidence402","requestId":"example-request"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"registry","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_UczX_UAvZvJXltnXhGt_1","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Reads public webpages, extracts structured data, and verifies DOI citations from academic or web content, paid per-call with USDC via x402.","exampleAgentPrompt":"Can you verify the DOI citations on this webpage — https://example.com/research-article — and tell me which ones are real, valid references and which ones can't be resolved?","exampleUseCases":[{"title":"Academic paper citation audit","prompt":"I'm reviewing this research article at https://journals.example.com/paper/12345 — can you check all the DOI citations in it and tell me which ones actually resolve to real published papers?"},{"title":"Fact-check a blog's sources","prompt":"This blog post at https://blog.example.com/climate-study claims to cite peer-reviewed research — can you extract and verify the DOIs it references so I know if the citations are legitimate?"},{"title":"Pre-publish bibliography check","prompt":"Before I submit my article, can you verify these DOIs are valid and resolvable: 10.1038/nature12345, 10.1016/j.cell.2020.01.001, and 10.1126/science.abc1234?"}],"resultDescription":"Returns a JSON object containing a citations array with verification results for each DOI found or submitted, a service identifier ('Evidence402'), and a requestId for tracking. Each citation entry indicates whether the DOI resolved successfully and may include metadata about the referenced publication.","failureModes":["Webpage URL is paywalled or requires login — content cannot be fetched","DOI does not exist or resolves to a 404 — marked as unverifiable","Rate limiting or network timeout when fetching the target URL","Invalid DOI format submitted — parsing error returned","Empty citations array if no DOIs are found in the provided content","Payment failure via x402 if USDC balance is insufficient"],"whenToPreferThis":"Choose this endpoint when you need to verify academic DOI citations from web content without managing an API subscription — it's ideal for agents that occasionally need citation validation and prefer pay-per-call USDC billing. Best suited for research integrity checks, bibliography auditing, and extracting structured citation data from public webpages.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-12T18:39:02.440Z","isFirstParty":false,"canonicalSlug":"evidence402-doi-citation-verifier-27229fce"}