PJM Interconnection

PJM Browserless Authentication API

The REST authentication front door for every browserless/API integration with PJM eTools. A client POSTs to the PJM single sign-on service with X-OpenAM-Username and X-OpenAM-Password headers and receives a JSON tokenId, which is then presented as a pjmauth cookie on subsequent tool API calls, and released via a logout call. PJM has additionally moved custom-code REST clients onto PKI, requiring a two-way TLS client certificate against the access/authenticate/pjmauthcert endpoint alongside credentials. The service is ForgeRock OpenAM — verified live with HTTP 405 on GET https://sso.pjm.com/access/authenticate/ on 2026-07-27, confirming the documented POST-only endpoint.

GitHub

Documentation

📖
Documentation
https://www.pjm.com/markets-and-operations/etools/security.aspx
📖
Authentication
https://raw.githubusercontent.com/api-evangelist/pjm/refs/heads/main/authentication/pjm-authentication.yml

Other Resources

🔗
Guide
https://www.pjm.com/-/media/DotCom/etools/pjm-browserless-authentication-guide.pdf
🔗
Guide
https://www.pjm.com/-/media/DotCom/etools/security/pki-authentication-guide.pdf
🔗
Sandbox
https://ssotrain.pjm.com/
🔗
AgentSkill
https://raw.githubusercontent.com/api-evangelist/pjm/refs/heads/main/skills/pjm-authenticate-browserless-etools.md

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API entry from apis.yml

apis.yml Raw ↑ 
aid: pjm:pjm-browserless-authentication-api
name: PJM Browserless Authentication API
description: The REST authentication front door for every browserless/API integration with PJM eTools.
  A client POSTs to the PJM single sign-on service with X-OpenAM-Username and X-OpenAM-Password headers
  and receives a JSON tokenId, which is then presented as a pjmauth cookie on subsequent tool API calls,
  and released via a logout call. PJM has additionally moved custom-code REST clients onto PKI, requiring
  a two-way TLS client certificate against the access/authenticate/pjmauthcert endpoint alongside credentials.
  The service is ForgeRock OpenAM — verified live with HTTP 405 on GET https://sso.pjm.com/access/authenticate/
  on 2026-07-27, confirming the documented POST-only endpoint.
humanURL: https://www.pjm.com/markets-and-operations/etools/security.aspx
baseURL: https://sso.pjm.com/access
image: https://www.pjm.com/assets/MVC/responsive/img/pjm-logo.png
tags:
- Authentication
- Single Sign-On
- Security
- PKI
properties:
- type: Guide
  url: https://www.pjm.com/-/media/DotCom/etools/pjm-browserless-authentication-guide.pdf
- type: Documentation
  url: https://www.pjm.com/markets-and-operations/etools/security.aspx
- type: Guide
  url: https://www.pjm.com/-/media/DotCom/etools/security/pki-authentication-guide.pdf
- type: Sandbox
  url: https://ssotrain.pjm.com/
- type: Authentication
  url: authentication/pjm-authentication.yml
- type: AgentSkill
  url: skills/pjm-authenticate-browserless-etools.md