PubMed Central Unclaimed
Bethesda, MD, United States
PubMed Central provides free, full-text access to biomedical and life sciences journal articles.
PubMed Central is a free full-text archive of biomedical and life sciences journal literature. Operated by the U.S. National Library of Medicine (NIH/NLM), PubMed Central provides researchers, clinicians, educators, and the public with access to peer-reviewed articles to support discovery, education, and evidence-based practice. It serves as a central repository and access point for open and NIH- or publisher-deposited content, enabling broad, long-term access to scholarly articles and contributing to transparency and reproducibility in biomedical research.
To provide free, permanent access to biomedical journal literature to support research, education, and patient care.
What we offer
PubMed Central journal participation
Facilitates journal access and compliance with NIH mandates for open science.
pmc.ncbi.nlm.nih.gov/pub/addjournal/NIH Portfolio Deposition
Ensures compliance with NIH mandates by depositing all NIH-funded articles into PMC.
pmc.ncbi.nlm.nih.gov/pub/addjournal/Selective Deposit
Facilitates selective article deposition for hybrid journals and funder mandates.
pmc.ncbi.nlm.nih.gov/about/selectivedeposit/Author Manuscript Deposit (NIHMS)
Facilitates manuscript submission for NIH-funded research by ensuring public access.
www.nihms.nih.gov/about/overview/PMC Publisher Services
Streamlines submission, tracking, and reporting for publishers participating in PMC.
www.ncbi.nlm.nih.gov/pmc/publisherservices/PMC Cloud Service
Access Open Access articles and author manuscripts quickly with PMC's cloud service.
pmc.ncbi.nlm.nih.gov/tools/cloud/OA Web Service API
Discover and access Open Access articles programmatically with streamlined retrieval options.
pmc.ncbi.nlm.nih.gov/tools/oa-service/PMC OAI-PMH API
Access metadata and full-text articles from PubMed Central with permissible licenses.
pmc.ncbi.nlm.nih.gov/tools/oai/Market segments
Market size by segment
Growth potential (CAGR)
Open access full-text archive
Long-term preservation and public access of peer-reviewed biomedical and life sciences articles to support open science and mandated open access collections.
Funder compliance and publisher workflow
Submission paths, eligibility checks, and reporting that enable authors, journals, and publishers to comply with NIH and other funder public access requirements.
Programmatic content access and bulk distribution
APIs, metadata harvesting, and cloud dataset delivery for programmatic discovery, bulk retrieval, and text-mining reuse of license-permitted PMC content.
More information about our offering
PubMed Central journal participation
PubMed Central journal participation is a deposition service enabling journals to deposit the final published version of all articles, or NIH-funded articles, into PubMed Central. It is one of three submission options and requires the journal to meet PMC's scientific and technical quality standards and to comply with PMC production and licensing guidelines.
- Ensure Compliance With GuidelinesParticipating journals must adhere to PMC's content submission standards and timelines for accurate representation.
- Provide Open Access ArticlesEnsures that articles are readily accessible to researchers and the public, improving visibility and citation impact.
- Uphold Quality StandardsParticipation involves rigorous evaluation to maintain high-quality scholarly publishing.
- Support Scientific Research AccessContributes to sustainable access to biomedical literature, fostering continuity in scientific inquiry and education.
- Flexibility in Journal ParticipationJournals can select their level of involvement, catering to specific publishing models and funding requirements.
NIH Portfolio Deposition
NIH portfolio deposition is a PMC option requiring journals to deposit all NIH-funded articles from the journal into PMC, with immediate release on the Date of Official Publication. Eligible journals are indexed in MEDLINE, and the arrangement ties into NIH Public Access policy compliance.
- Deposits All NIH-Funded ArticlesThis ensures a comprehensive collection of NIH-funded research is readily available in PubMed Central, enhancing accessibility.
- Ensures Immediate AccessAllows readers to access the latest NIH-funded articles without delay, supporting timely dissemination of research findings.
- Supports NIH Public Access ComplianceFacilitates adherence to NIH guidelines for public access to federally funded research, increasing overall transparency and accessibility.
- Maintains High-Quality StandardsThis ensures that only reputable journals participate, upholding the integrity of the repository.
Selective Deposit
Selective Deposit enables publishers to deposit select articles from a collection of MEDLINE journals. It is designed for hybrid journals and funder policies that require targeted open access or licensing terms.
- Ensures Compliance With Funder PoliciesGuarantees adherence to specific licensing and open access requirements mandated by various funding agencies.
- Allows Selective Article DepositionsEmpowers publishers to choose specific articles for deposit, enhancing compliance without overwhelming the archives.
- Caters To Hybrid JournalsEnables hybrid journals to allow open access for selected articles while retaining subscription-based access for others.
- Facilitates Long-term ArchivingEnsures that selected articles are preserved for future access, supporting ongoing research and public health initiatives.
Author Manuscript Deposit (NIHMS)
Author Manuscript Deposit allows publishers to submit author manuscripts through the NIH Manuscript Submission system, without requiring formal agreements. This service supports compliance with the NIH Public Access policy, ensuring that research funded by NIH is publicly accessible and stored in a secure, long-term repository.
- Enables Easy Manuscript SubmissionPublishers can easily submit author manuscripts, ensuring compliance with NIH policies.
- Ensures Article LongevityGuarantees manuscripts are accessible for future research and public reference.
- Enhances Public Research AccessEnsures that research funded by NIH is publicly available and easily accessible.
- Supports Funder ComplianceStreamlines the submission process by allowing publishers to submit manuscripts without direct author involvement.
- Reduces Administrative BurdensFacilitates manuscript submission without lengthy agreements, speeding up the process.
PMC Publisher Services
PMC Publisher Services provides a portal with tools and reports for applying to PMC, tracking deposits, and obtaining usage statistics.
- Optimize Your DepositsSubmit and track your articles in a user-friendly interface, ensuring compliance with PMC guidelines.
- Simplify Your Submission ProcessEasily navigate different channels for article submission to meet funder requirements.
- Access Comprehensive ReportsGain insights on article performance and deposit success to enhance your strategy.
- Receive Essential UpdatesStay informed with the latest news and updates related to PMC and your submissions.
- Leverage API AccessUtilize advanced API functionality for data retrieval and integration into your workflows.
PMC Cloud Service
PMC Cloud Service provides cloud access to the Open Access Subset and the Author Manuscript Dataset for fast retrieval via AWS, with daily updates and licensing terms described on dataset pages.
- Access Content QuicklyFast retrieval of a wide range of articles for research and analysis through cloud services, enhancing accessibility for users.
- Stay UpdatedUsers receive the latest available articles and datasets, reflecting immediate updates in biomedical literature.
- Understand LicensingClear and accessible information about licensing terms for each dataset ensures compliance and proper use of materials.
OA Web Service API
OA Web Service API enables programmatic discovery of downloadable resources from the PMC Open Access Subset and related licenses, with responses including identification data and result sets via HTTP, plus licensing details.
- Instant Access to Open Access ContentStreamline research and application development with direct access to a wealth of publicly available scientific articles.
- Facilitates Efficient Data RetrievalUsers can retrieve large datasets effectively using resumption tokens, minimizing interruptions in data fetching.
- Access Comprehensive Query ResponsesThe API returns precise details about requested articles and license terms for easy integration into applications.
PMC OAI-PMH API
PMC OAI-PMH API provides metadata harvesting of PubMed Central items and full-text access for eligible licenses, implementing OAI-PMH version 2.0.
- Retrieve Full-text ArticlesAllows users to access and download complete text for articles that permit reuse, enhancing research capabilities.
- Harvest Item MetadataEnables users to obtain comprehensive metadata about articles within PubMed Central, facilitating better data organization.
- Utilize OAI-PMH ProtocolProvides an up-to-date protocol for harvesting metadata, ensuring compatibility with current standards and practices.
- Manage Large Data RequestsAllows users to efficiently handle large results by enabling continued data retrieval in manageable segments.
- Access Comprehensive Article InformationEnhances the quality of data retrieved, providing users with context and direct access to related research.
References
Methodology and sourcing behind the figures shown above.
Open access full-text archive
No direct market-size figure for “open access full‑text archive” was present in the search results. I used the enterprise information‑archiving market (global EIA ~USD 9–10B in 2025) and library/archive sector context as an upper‑bound comparable, and applied a conservative share estimate for the niche of long‑term, open‑access full‑text preservation (centralized repositories, institutional repositories, and commercial preservation services). Growth potential reflects accelerating OA mandates and rising share of openly accessible articles (driving repository investment and preservation services). The estimate (≈USD 0.3B) assumes the archive niche is a small fraction of broader archiving and library spend; the CAGR (~11%) reflects strong policy-driven OA adoption but is lower than broader enterprise archiving forecasts.
- The global enterprise information archiving market size was valued at USD 9.9 billion in 2025.
- The Enterprise Information Archiving Market was valued at USD 9.25 billion in 2025E.
- Percentage of openly accessible articles rose from ~30% (2010) to ~50% (2019).
- While 80% of the academic publishing market is still based on the paywall subscription business model, open access publishing is growing.
Funder compliance and publisher workflow
Estimated by mapping the niche (funder compliance & publisher workflow) onto larger adjacent markets (ECM, workflow, cloud and media workflow). Search results show ECM ($59.5B in 2026) and multiple workflow/cloud segments ($7.7–25B current sizes) with double-digit CAGRs (10–33%). Funder-compliance/publisher workflow is a small vertical within publishing/ECM/workflow technology; conservatively sized at under 1% of broader workflow/ECM addressable markets today and projected to grow modestly above enterprise IT due to regulatory pressure and cloud migration—hence a ~ $0.8B current market and ~12% CAGR.
- ECM market size estimated to grow from USD 59.53 billion in 2026 to USD 95.76 billion by 2031
- Global Media Workflow Management Software Market is estimated to be valued at USD 5.3 Billion in 2023 and expected to reach USD 9.7 Billion by 2030
- The Cloud Workflow Market Size was estimated at 7.718 USD Billion in 2024
- Workflow Management System Market was valued at USD 24.97 Billion in 2025
- Workflow Management System Market to Reach $11.5B by 2033; 25% CAGR
Programmatic content access and bulk distribution
No explicit market estimates for "programmatic content access and bulk distribution" appear in the results. I used cited programmatic advertising/display market figures as an upper-bound context (FMI: USD 106.4B programmatic display in 2026; MRFR: USD 811.8B programmatic advertising 2024). Given that PMC-focused APIs, metadata harvesting and bulk dataset delivery are a highly specialized, B2B subset (research/biotech/AI customers) I assumed a small share (~0.2% of the programmatic display base) to estimate ~USD 0.2B in 2026. Growth potential draws on reported programmatic CAGRs (MRFR ~14.4%, FMI ~24.6%); because demand for text-mining, AI training data, and programmatic API services is accelerating but remains niche, I selected an intermediate CAGR of ~18%.