# PJM Browserless Authentication API

**Canonical:** https://apis.io/apis/pjm/pjm-browserless-authentication-api/  
**Provider:** PJM Interconnection — https://apis.io/providers/pjm/  
**Base URL:** https://sso.pjm.com/access  
**Documentation:** https://www.pjm.com/markets-and-operations/etools/security.aspx

PJM Browserless Authentication 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 Authentication, Single Sign-On, Security, and PKI. The published artifact set on APIs.io includes API documentation and authentication docs.

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.

## Machine-readable artifacts (6)

- **Guide** — https://www.pjm.com/-/media/DotCom/etools/pjm-browserless-authentication-guide.pdf
- **Documentation** — https://www.pjm.com/markets-and-operations/etools/security.aspx
- **Guide** — https://www.pjm.com/-/media/DotCom/etools/security/pki-authentication-guide.pdf
- **Sandbox** — https://ssotrain.pjm.com/
- **Authentication** — https://raw.githubusercontent.com/api-evangelist/pjm/refs/heads/main/authentication/pjm-authentication.yml
- **AgentSkill** — https://raw.githubusercontent.com/api-evangelist/pjm/refs/heads/main/skills/pjm-authenticate-browserless-etools.md

## 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 OASIS Template API](https://apis.io/apis/pjm/pjm-oasis-template-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

Authentication, Single Sign-On, Security, PKI

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