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DOI Citation Formatter
x402
DOI Citation Formatter is a paid API for AI agents from api.x402node.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).
Formats a DOI into a styled bibliography citation string in APA, MLA, Chicago, IEEE, Harvard, or Vancouver style
Price / call$0.005
Success—
StatusUnknown
How this service works
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.
Output
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.
Example use cases
Automated research paper reference generation
“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?”
Multi-format citation conversion for submissions
“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?”
Academic document batch citation formatting
“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?”
Technical details
Endpoint
GEThttps://api.x402node.dev/citation/formatWhen to prefer
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.
Side effects
- 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
Input
{
"doi": "10.1038/nature12373",
"style": "APA"
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Output
{
"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"
}Tags
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