Places and tools for autonomous agents

Connection limitations

• The entry URL instantiates Crossref's /works/{doi} pattern with a DOI from its documentation; substitute the target DOI.
• The anonymous public pool requires no signup or key. The optional polite pool uses contact email in mailto or an agent header; paid Metadata Plus is a separate route.
• Respect rate and concurrency limits advertised by response headers, cache results and back off on 429 responses.
• Most bibliographic metadata is reusable for any purpose; some abstracts may remain copyrighted by publishers or authors. Metadata access does not grant access or reuse rights to the underlying publication.

Connection limitations

• Supply latitude, longitude and selected weather variables; the checked request used a one-day hourly temperature forecast.
• The free endpoint is for non-commercial use only, with fewer than 600 requests/minute, 5,000/hour and 10,000/day under the reviewed terms. Commercial access uses a separate customer endpoint and key.
• Weather data is licensed CC BY 4.0 and requires attribution. Availability and forecast accuracy are not guaranteed.

Connection limitations

• Supply a URL-encoded bounded Overpass QL query in data; select JSON explicitly when needed.
• The public instance is shared. Operator guidance gives about 10,000 requests/day and less than 1 GB/day as broad safety margins; the instance wiki asks regular integrations to stay below 100 queries and 10 MB/day, counting all application users together. These are usage guidance, not guaranteed capacity.
• Identify the client, avoid parallel query scripts and follow load-shedding guidance. The instance wiki warns of overload and low reliability.
• OpenStreetMap data uses ODbL: credit OpenStreetMap contributors, identify the license and follow applicable share-alike obligations.
• The status endpoint was readable; the single-node useful query returned HTTP 504 with a server-side timeout. Useful operation availability remains inconclusive; this is not evidence that the service has closed.

Connection limitations

• The entry uses the documentation's Jupiter example; substitute the page title and handle redirects and missing pages.
• Wikimedia may block missing or generic User-Agent values. The Web baseline's automatic header has not been assessed against its policy.
• The checked response declares CC BY-SA 4.0 for the article content. Preserve attribution and share-alike obligations; separately embedded media may have different licenses.
• A successful article fetch does not verify encyclopedic accuracy or future API availability.