Query content from the seven open-access peer-reviewed journals from the Public Library of Science using any of the twenty-three terms in the PLOS Search. API key will be used for both the PLOS ALM API and PLOS Search API.
Result format: JSON, XML,
Access requirement: Free, registration required, API key required
Limitations: Max is 7200 requests a day, 300 per hour, 10 per minute; bulk downloading through API calling is not encouraged
Technical support: api@plos.org;
PLos API Google Group
Documentation: PLOS API Documentation