NAESB Electric Industry Registry (EIR) webRegistry Web Services
The NAESB Electric Industry Registry is the central repository of registry information used by the North American wholesale electric industry for electronic tagging; it replaced the NERC TSIN in 2012 and is administered for NAESB by Open Access Technology International (OATI) as OATI webRegistry. It exposes a documented SOAP 1.1 web service with methods including DownloadEntity, DownloadBA, DownloadPSE and DownloadACA, described across the 121-page OATI webRegistry Technical Guide v6.1. The service is HTTPS-only, and per section 2.5 of that guide no request is processed unless it carries a digitally signed certificate associated with a registered webRegistry user; those certificates are issued by NAESB-Authorized Certification Authorities. Access also requires a paid registry subscription. The full WSDL — one service, one portType and thirty Download* operations over thirty entity structs — IS served to anonymous callers and is harvested here verbatim. Two things complicate reaching it: the server certificate is issued by OATI's private "webCARES Server Issuing CA 2025" and does not chain to a public root, so default trust stores fail verification (curl exit 60); and once that is accounted for, an anonymous SOAP call returns HTTP 200 with ReturnCode 1 / FAILURE and the message "Please present a valid certificate that is associated with a NAESB EIR user". The contract is public; the data behind it is not.