Verified Sourcepaths · REST API

NCBI E-utilities (PubMed)

healthy

Publisher

NCBI / NLM

Human landing

https://www.ncbi.nlm.nih.gov/books/NBK25501/

Artifact URL

https://eutils.ncbi.nlm.nih.gov/entrez/eutils/einfo.fcgi?retmode=json&tool=the_allodium&email=Aurismind87@gmail.com

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Auth

API key optional

Rate limit

3 requests per second keyless; 10 rps with a free API key; exceeding 10 rps throttles with a 429 (NLM Support KA-05510). Large jobs should run weekends or 21:00-05:00 US Eastern.

Evidence

life-sciences · pubmed · scholarly-metadata

Publisher identity: NCBI / NLM Artifact relationship: official domain Automated access: plain GET succeeded Integrity hash: 8158ac06c8dd… Parseability: valid Effects: read Licensing: NCBI data use per NLM terms; no full-text mirroring. Freshness: Sep 17, 2026, 7:10 PM PDT

Notes

tool and email are public and live in artifact_url. The API key is injected at fetch time as a query param and never stored on the row. Anonymous GET still returns 200; the key only raises the ceiling from 3 to 10 rps.

Tasks this artifact can answer

• search PubMed via E-utilities
• fetch PubMed records in a machine-readable format
• look up a PMID through the NCBI E-utilities base

Change history

• healthySep 17, 2026, 7:10 PM PDT · HTTP 200 · anonymous GET returns 200; the host-side credential only raises quota or is unused for this URL
• healthySep 17, 2026, 7:03 PM PDT · HTTP 200 · anonymous GET returns 200; the host-side credential only raises quota or is unused for this URL
• healthySep 17, 2026, 6:57 PM PDT · HTTP 200 · anonymous GET returns 200; the host-side credential only raises quota or is unused for this URL
• healthySep 17, 2026, 6:57 PM PDT · HTTP 200 · anonymous GET returns 200; the host-side credential only raises quota or is unused for this URL
• healthySep 17, 2026, 6:55 PM PDT · HTTP 200 · anonymous GET returns 200; the host-side credential only raises quota or is unused for this URL
• healthySep 17, 2026, 6:55 PM PDT · HTTP 200 · anonymous GET returns 200; the host-side credential only raises quota or is unused for this URL
• healthySep 17, 2026, 6:06 PM PDT · HTTP 200 · anonymous GET returns 200; the host-side credential only raises quota or is unused for this URL
• healthySep 17, 2026, 6:01 PM PDT · HTTP 200 · anonymous GET returns 200; the host-side credential only raises quota or is unused for this URL; measured with a host-side credential
• healthySep 17, 2026, 5:06 PM PDT · HTTP 200
• healthySep 17, 2026, 4:22 PM PDT · HTTP 200
• healthySep 17, 2026, 4:22 PM PDT · HTTP 200
• healthySep 16, 2026, 8:36 PM PDT · HTTP 200
• degradedSep 16, 2026, 7:55 PM PDT · HTTP 400 · http 400
• degradedSep 16, 2026, 7:54 PM PDT · HTTP 400 · http 400