# PJM OASIS Template API

**Canonical:** https://apis.io/apis/pjm/pjm-oasis-template-api/  
**Provider:** PJM Interconnection — https://apis.io/providers/pjm/  
**Base URL:** https://pjmoasis.pjm.com/OASIS/PJM/data/  
**Documentation:** https://www.pjm.com/markets-and-operations/etools/oasis.aspx

PJM OASIS Template API is one of 6 APIs that [PJM Interconnection](https://apis.io/providers/pjm/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include OASIS, Transmission, NAESB, FERC Order 889, and Available Transfer Capability. The published artifact set on APIs.io includes API documentation.

PJM's Open Access Same-Time Information System (OASIS) node, the FERC Order 889 obligation implemented against the NAESB Wholesale Electric Quadrant business practice standards. PJM states support for NAESB WEQ-002 (Standards and Communication Protocol) and WEQ-003 (Data Dictionary) versions 2.0, 2.1, 2.2 and 3.3, accepting query/response and input/response templates over HTTP GET (Content-type text/plain) and POST (application/x-www-form-urlencoded) against the template base URL, plus three PJM custom templates (pjmannulment, pjmtransreq, pjmtsrcomment). The NAESB WEQ-002-4.5.2 public information page at https://pjmoasis.pjm.com/OASIS/PJM/INFO.HTM is served anonymously (verified HTTP 200 on 2026-07-27); template submission itself requires a PJM SSO session token or the PJM Command Line Interface tool.

## Machine-readable artifacts (7)

- **Documentation** — https://www.pjm.com/markets-and-operations/etools/oasis.aspx
- **Guide** — https://www.pjm.com/-/media/DotCom/etools/oasis/pjm-oasis-api-user-guide.pdf
- **PublicInformation** — https://pjmoasis.pjm.com/OASIS/PJM/INFO.HTM
- **Sandbox** — https://oasistrain.pjm.com/
- **CLI** — https://www.pjm.com/-/media/DotCom/etools/pjm-command-line-interface-java-11.zip
- **Standard** — https://www.naesb.org/weq/default.asp
- **Conformance** — https://raw.githubusercontent.com/api-evangelist/pjm/refs/heads/main/conformance/pjm-conformance.yml

## Other PJM Interconnection APIs (5)

- [PJM Data Miner 2 API](https://apis.io/apis/pjm/pjm-data-miner-2-api/)
- [PJM Messages Public Web Service](https://apis.io/apis/pjm/pjm-messages-public-api/)
- [PJM Browserless Authentication API](https://apis.io/apis/pjm/pjm-browserless-authentication-api/)
- [PJM InSchedule Browserless API](https://apis.io/apis/pjm/pjm-inschedule-api/)
- [PJM eDART Browserless API](https://apis.io/apis/pjm/pjm-edart-api/)

## Tags

OASIS, Transmission, NAESB, FERC Order 889, Available Transfer Capability

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