# ERCOT Web Services (EWS)

**Canonical:** https://apis.io/apis/ercot/ercot-web-services/  
**Provider:** ERCOT — https://apis.io/providers/ercot/  
**Documentation:** https://developer.ercot.com/applications/ews/Introduction/

ERCOT Web Services (EWS) is one of 5 APIs that [ERCOT](https://apis.io/providers/ercot/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include SOAP, Market Participants, Bids, Outages, and Energy Markets. The published artifact set on APIs.io includes API documentation.

ERCOT's SOAP web-services estate for Nodal market participants — the Market Information Service, Market Transaction Service (bid and offer submission via BidSet), Resource Parameter Transaction Service, Outage Scheduling Services, Verbal Dispatch Instructions, and WS-Notifications callbacks. WSDL and XSD contracts are published openly on GitHub, but the runtime endpoints are reachable only by registered ERCOT Market Participants holding an ERCOT digital certificate; the shipped WSDL carries a placeholder soap:address of https://dummyhost:0000/ so no runtime base URL is asserted here.

## Machine-readable artifacts (6)

- **WSDL** — https://raw.githubusercontent.com/ercot/api-specs/main/ews/wsdls/Nodal.wsdl
- **WSDL** — https://raw.githubusercontent.com/ercot/api-specs/main/ews/wsdls/Notification.wsdl
- **Webhooks** — https://raw.githubusercontent.com/api-evangelist/ercot/refs/heads/main/asyncapi/ercot-ews-notifications.yml
- **Documentation** — https://developer.ercot.com/applications/ews/Introduction/
- **Documentation** — https://developer.ercot.com/applications/ews/Services%20Organization/
- **SourceCode** — https://github.com/ercot/ews-client

## Other ERCOT APIs (4)

- [ERCOT Public Data API](https://apis.io/apis/ercot/ercot-public-data-api/)
- [ERCOT ESR Public Data API](https://apis.io/apis/ercot/ercot-esr-public-data-api/)
- [ERCOT MarkeTrak API](https://apis.io/apis/ercot/ercot-marketrak-api/)
- [ERCOT Retail API](https://apis.io/apis/ercot/ercot-retail-api/)

## Tags

SOAP, Market Participants, Bids, Outages, Energy Markets

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/ercot/ercot-web-services/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/ercot/.