{"uid":"cap_miTi_1mBlyp0lBOMYjR9v","slug":"api-x402node-dev-97daa60e","name":"DOI Citation Formatter","description":"Format any DOI into a styled citation (apa, mla, chicago, ieee, harvard, vancouver). Returns plain-text bibliography string. Use ?doi=10.1038/nature12373 and style=apa. Built for AI agents producing draft references. Accepts payment on Base or Solana — either network works.","url":"https://api.x402node.dev/citation/format","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["doi"],"properties":{"doi":{"type":"string","description":"DOI string (required)"},"style":{"type":"string","description":"Style (optional)"}}}},"additionalProperties":false}}},"responseSchema":null,"example":{"request":{"doi":"10.1038/nature12373","style":"APA"},"response":{"doi":"10.1038/nature12373","_hint":"x402 paid endpoints for AI agents — x402node.dev (utilities) · cn402.com (Chinese culture)","style":"apa","citation":"Kucsko, G., Maurer, P. C., Yao, N. Y., Kubo, M., Noh, H. J., Lo, P. K., Park, H., & Lukin, M. D. (2013). Nanometre-scale thermometry in a living cell. Nature, 500(7460), 54–58. https://doi.org/10.1038/nature12373","csl_style":"apa"}},"exampleRequest":{"doi":"10.1038/nature12373","style":"APA"},"tags":["x402"],"displayCostAmount":"0.005","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"settled","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":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_KliGaw6LwlnRFV52UVYtH","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Formats a DOI into a styled bibliography citation string in APA, MLA, Chicago, IEEE, Harvard, or Vancouver style","exampleAgentPrompt":"Can you format the paper with DOI 10.1038/nature12373 as a proper APA citation for my bibliography?","exampleUseCases":[{"title":"Automated research paper reference generation","prompt":"I'm compiling a literature review and have a list of DOIs. Can you format each one as an MLA citation so I can build my works cited page?"},{"title":"Multi-format citation conversion for submissions","prompt":"I need to submit this paper to a journal that requires Harvard style citations, but I've been using Chicago. Can you convert my DOI references to the right format?"},{"title":"Academic document batch citation formatting","prompt":"I have about 20 research papers with their DOIs noted. Can you generate Vancouver-style citations for all of them so I can paste them directly into my thesis bibliography?"}],"resultDescription":"A plain-text bibliography string with the citation formatted in the requested style (APA, MLA, Chicago, IEEE, Harvard, or Vancouver), ready to paste into a reference list or document.","failureModes":["DOI not found or invalid — returns error indicating the DOI could not be resolved","Unsupported citation style specified — returns error with valid style options","DOI metadata incomplete — citation may be partially formatted or missing fields","Network timeout resolving DOI metadata from upstream resolver"],"whenToPreferThis":"Use this endpoint when an AI agent needs to produce a formatted citation from a DOI for any of the six major citation styles. It is purpose-built for agents generating draft references and academic documents, avoiding the need to parse DOI metadata manually and apply citation formatting rules.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T06:41:59.109Z","isFirstParty":false}