← Back to directory

Look up scholarly metadata for any DOI via CrossRef. Returns title, authors, jou...

https://api.x402node.dev/citation/doi

Overview

Look up scholarly metadata for any DOI via CrossRef. Returns title, authors, journal, publication date, abstract, citation count, references, license, URL. Use ?doi=10.1038/nature12373. Built for AI research agents doing literature review and citation graph traversal.

Protocol x402
Price
Payment Asset USD Coin
Payment Network eip155:8453
Category tools/search
Provider x402node
Source bazaar
Indexed 2026-05-28 20:24:55

Health

Status healthy
Latency (p50) 436ms
Uptime (30d) 100.0%
Reliability Score 95/100
Last Checked 2026-09-16 18:43:49
Last Healthy 2026-09-16 18:43:49
Consecutive Failures 0

x402 Payment Validation

Payment Requirements Valid
Asset Verified Known USDC
Facilitator

Recent Health Checks

Time Status HTTP Latency Error
2026-09-16 18:43:49 healthy 402 466ms
2026-09-16 08:23:56 healthy 402 145ms
2026-09-16 00:02:48 healthy 402 436ms
2026-09-15 12:14:03 healthy 402 980ms
2026-09-15 04:01:13 healthy 402 746ms
2026-09-14 20:17:55 healthy 402 1024ms
2026-09-14 13:23:59 healthy 402 430ms
2026-09-14 06:44:55 healthy 402 433ms