Crossref REST API
crossref.orgSearch Crossref’s deposited scholarly metadata and retrieve records by DOI or other publication identifiers.
Search Crossref’s deposited scholarly metadata and retrieve records by DOI or other publication identifiers.
Contact and company records organized by lists and linked relationships
Category budgets, subscription reminders and optional bank imports
Issue invoices and organize sales and expense documents
Run a health practice from a calendar that connects patient records, online bookings, and reminders.
Personal account records and envelope budgets for Apple devices
Manual expense tracking with optional personal-cloud synchronization
Indonesian accounting connected to warehouse and production records
Work with files and command output as structured records and tables in a cross-platform shell.
Personal expense records with receipts and adjustable category budgets
Review UK crypto records with private account data and tax-year previews
Sales CRM with role-controlled deal edits and a continuing free edition
Japanese household records built from receipt photos and human data entry
Connected revenue records with configurable sales workflows
Institutional digital-asset records for reconciliation, close and ERP exports
European VAT records and filing services with a tax-letter inbox
Shared customer records with stage-specific deal work
Employee records and configurable HR workflows with visible task progress
Recruitment ATS and CRM with candidate, client, and placement work
Customisable sales records with inbox sync, no-reply reminders, and workflow rules
Employee records, time, onboarding, learning, and performance workflows
Serialize structured data with schemas and compact binary encoding across supported programming languages.
Connect workforce records and timesheets with staffing back-office payroll and billing information.
Client, appointment and invoice records with desktop and paid shared access