aid: pjm
url: https://raw.githubusercontent.com/api-evangelist/pjm/refs/heads/main/apis.yml
name: PJM Interconnection
kind: company
description: >-
  PJM Interconnection is the regional transmission organization (RTO) that operates
  the largest competitive wholesale electricity market in the United States,
  coordinating the movement of electricity across all or parts of Delaware,
  Illinois, Indiana, Kentucky, Maryland, Michigan, New Jersey, North Carolina,
  Ohio, Pennsylvania, Tennessee, Virginia, West Virginia and the District of
  Columbia for roughly 67 million people. PJM sits at the wholesale layer of the
  energy value chain — it has no retail customers, so no Green Button, ESPI or
  consumer data-sharing obligation applies to it. Its API posture is honestly
  "rich data, universally gated": PJM publishes a large machine-readable market
  data catalogue through the Data Miner 2 API at https://api.pjm.com/api/v1 and an
  Azure API Management developer portal at https://apiportal.pjm.com, but every
  feed returns HTTP 401 anonymously and a free subscription key is only issued
  after a PJM Tools account is registered and approved by a Customer Account
  Manager. Its one genuinely mandated interface is the FERC Order 889 / NAESB WEQ
  OASIS node, which is verifiably live and standards-conformant at
  https://pjmoasis.pjm.com, though template submission also requires an
  authenticated PJM SSO session. One genuinely anonymous PJM REST API does exist and
  is easy to miss: the Messages public web service at
  https://messages.pjm.com/messages/rest/public/messages, linked as "Web Service" from
  the Upcoming Changes page, returns the planned-outage and impact notices for the
  whole PJM tool estate with no credential, in XML or JSON.
image: https://www.pjm.com/assets/MVC/responsive/img/pjm-logo.png
tags:
- Energy
- United States
- Energy Markets
- Electricity
- Grid
- System Operator
- Wholesale Electricity
- Transmission
- Market Data
- Demand Response
created: '2026-07-27'
modified: '2026-07-27'
specificationVersion: '0.19'
apis:
- aid: pjm:pjm-data-miner-2-api
  name: PJM Data Miner 2 API
  description: >-
    PJM's public wholesale market and system data catalogue, exposed as a REST API
    behind Azure API Management. Feeds include day-ahead and real-time hourly and
    five-minute LMPs, ancillary service prices and market results, generation by
    fuel type, hourly metered/estimated/preliminary load, load forecasts,
    generation and transmission outages, FTR auction bids and zonal LMPs, pnode and
    aggregate definitions, and uplift and billing determinants. Each feed supports
    a /metadata call and a search call with rowCount/startRow paging, field
    selection, sorting and date-range filters, and JSON or CSV output. The data is
    designated public by PJM and the key is free, but anonymous calls are rejected
    — verified HTTP 401 on GET https://api.pjm.com/api/v1/gen_by_fuel on 2026-07-27
    — and redistribution requires at minimum a PJM Associate Membership.
  humanURL: https://www.pjm.com/markets-and-operations/etools/data-miner-2
  baseURL: https://api.pjm.com/api/v1
  image: https://www.pjm.com/assets/MVC/responsive/img/pjm-logo.png
  tags:
  - Market Data
  - Electricity
  - Energy Markets
  - Locational Marginal Pricing
  - Load
  - Outages
  properties:
  - type: Documentation
    url: https://www.pjm.com/markets-and-operations/etools/data-miner-2
  - type: APIPortal
    url: https://apiportal.pjm.com/
  - type: Guide
    url: https://www.pjm.com/-/media/DotCom/etools/data-miner-2/data-miner-2-api-guide.ashx
  - type: SwaggerUI
    url: https://services.pjm.com/PJMDataminerApi/swagger
  - type: Console
    url: https://dataminer2.pjm.com/list
  - type: SignUp
    url: https://accountmanager.pjm.com/accountmanager/pages/public/new-user.jsf
  - type: APIReference
    url: https://www.pjm.com/-/media/DotCom/etools/data-miner-2/data-miner-2-api-guide.ashx
  - type: GettingStarted
    url: https://www.pjm.com/-/media/DotCom/etools/data-miner-2/data-miner-2-getting-started-guide.pdf
  - type: ChangeLog
    url: https://www.pjm.com/markets-and-operations/etools/data-miner-2/data-miner-2-release-notes.aspx
  - type: FAQ
    url: https://learn.pjm.com/three-priorities/keeping-the-lights-on/data-miner-faqs.aspx
  - type: RateLimits
    url: rate-limits/pjm-rate-limits.yml
  - type: Conventions
    url: conventions/pjm-conventions.yml
  - type: ErrorCatalog
    url: errors/pjm-error-catalog.yml
  - type: DataModel
    url: data-model/pjm-data-model.yml
  - type: Sandbox
    url: https://api-train.pjm.com/api/v1
  - type: AgentSkill
    url: skills/pjm-query-data-miner-feed.md
- aid: pjm:pjm-messages-public-api
  name: PJM Messages Public Web Service
  description: >-
    The only fully anonymous PJM REST API found on the public surface. It backs the
    PJM Upcoming Changes page and returns the current planned-outage, delayed-data and
    impact notices for the whole PJM eTools estate — affected applications by name and
    numeric id, the change window as epoch milliseconds, required actions, and an
    access-blocking flag. GET https://messages.pjm.com/messages/rest/public/messages
    returned HTTP 200 with no credential on 2026-07-27, serving
    application/xml;charset=UTF-8 by default and JSON under Accept: application/json.
    There are no documented query parameters, no paging and no filtering — it returns
    the current notice set as one small document. It is poll-only; PJM registers no
    webhooks, and the alternative subscription channel is email.
  humanURL: https://www.pjm.com/markets-and-operations/etools/upcoming-changes
  baseURL: https://messages.pjm.com/messages/rest/public
  image: https://www.pjm.com/assets/MVC/responsive/img/pjm-logo.png
  tags:
  - Status
  - Notifications
  - Planned Outages
  - Grid Operations
  - Open Access
  properties:
  - type: Documentation
    url: https://www.pjm.com/markets-and-operations/etools/upcoming-changes
  - type: Guide
    url: https://www.pjm.com/-/media/etools/upcoming-changes-how-to-guide.pdf
  - type: JSONSchema
    url: json-schema/pjm-message.json
  - type: Examples
    url: examples/_index.yml
  - type: AgentSkill
    url: skills/pjm-watch-tool-change-notices.md
  - type: StatusPage
    url: https://www.pjm.com/markets-and-operations/etools/upcoming-changes
- aid: pjm:pjm-oasis-template-api
  name: PJM OASIS Template API
  description: >-
    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.
  humanURL: https://www.pjm.com/markets-and-operations/etools/oasis.aspx
  baseURL: https://pjmoasis.pjm.com/OASIS/PJM/data/
  image: https://www.pjm.com/assets/MVC/responsive/img/pjm-logo.png
  tags:
  - OASIS
  - Transmission
  - NAESB
  - FERC Order 889
  - Available Transfer Capability
  properties:
  - type: Documentation
    url: https://www.pjm.com/markets-and-operations/etools/oasis.aspx
  - type: Guide
    url: https://www.pjm.com/-/media/DotCom/etools/oasis/pjm-oasis-api-user-guide.pdf
  - type: PublicInformation
    url: https://pjmoasis.pjm.com/OASIS/PJM/INFO.HTM
  - type: Sandbox
    url: https://oasistrain.pjm.com/
  - type: CLI
    url: https://www.pjm.com/-/media/DotCom/etools/pjm-command-line-interface-java-11.zip
  - type: Standard
    url: https://www.naesb.org/weq/default.asp
  - type: Conformance
    url: conformance/pjm-conformance.yml
- 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
- aid: pjm:pjm-inschedule-api
  name: PJM InSchedule Browserless API
  description: >-
    The browserless REST interface to PJM InSchedule, the eTool market participants
    use to submit and retrieve bilateral internal energy transaction schedules and
    contracts. PJM's browserless authentication guide documents CSV file upload
    under /inschedule/rest/secure/upload/file/{filename} and CSV retrieval under
    /inschedule/rest/secure/download/csv/contracts with start and stop date
    parameters, both authenticated with a pjmauth session cookie. Anonymous access
    is refused — an unauthenticated GET of the documented contracts endpoint on
    2026-07-27 returned the ForgeRock OpenAM sign-in page rather than data. This is
    a member/participant surface, not an open data API.
  humanURL: https://www.pjm.com/markets-and-operations/etools/inschedule.aspx
  baseURL: https://insched.pjm.com/inschedule/rest
  image: https://www.pjm.com/assets/MVC/responsive/img/pjm-logo.png
  tags:
  - Scheduling
  - Bilateral Transactions
  - Energy Markets
  - Members Only
  properties:
  - type: Guide
    url: https://www.pjm.com/-/media/DotCom/etools/pjm-browserless-authentication-guide.pdf
  - type: Sandbox
    url: https://inschedtrain.pjm.com/
  - type: Documentation
    url: https://www.pjm.com/markets-and-operations/etools/inschedule.aspx
  - type: Authentication
    url: authentication/pjm-authentication.yml
- aid: pjm:pjm-edart-api
  name: PJM eDART Browserless API
  description: >-
    The browserless XML-over-HTTP interface to eDART, PJM's Dispatcher Applications
    and Reporting Tool, used by transmission owners and generation owners to file
    and query transmission and generator outage tickets, voltage schedules and
    other reliability data. PJM publishes the XML document definitions for the
    general endpoints openly at
    https://www.pjm.com/pjmfiles/pub/etools/edart/xmldocs/xmldoc.html (verified HTTP
    200, ~482KB, on 2026-07-27), while the endpoints themselves sit behind PJM SSO
    and PKI at https://edartsso.pjm.com/edart/. Documentation is public; the data
    is participant-only.
  humanURL: https://www.pjm.com/markets-and-operations/etools/edart.aspx
  baseURL: https://edartsso.pjm.com/edart/
  image: https://www.pjm.com/assets/MVC/responsive/img/pjm-logo.png
  tags:
  - Outages
  - Reliability
  - Transmission
  - XML
  - Members Only
  properties:
  - type: Documentation
    url: https://www.pjm.com/pjmfiles/pub/etools/edart/xmldocs/xmldoc.html
  - type: Guide
    url: https://www.pjm.com/-/media/DotCom/etools/edart/dart-browserless-user-guide.pdf
  - type: Sandbox
    url: https://edartssotrain.pjm.com/edartsso
  - type: Vocabulary
    url: https://www.pjm.com/pjmfiles/pub/etools/edart/xmldocs/xmldoc.html
common:
- type: VulnerabilityDisclosure
  url: security/pjm-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/pjm-domain-security.yml
- type: Website
  url: https://www.pjm.com/
- type: APIPortal
  url: https://apiportal.pjm.com/
- type: Documentation
  url: https://www.pjm.com/markets-and-operations/etools
- type: SignUp
  url: https://accountmanager.pjm.com/accountmanager/pages/public/new-user.jsf
- type: Authentication
  url: https://www.pjm.com/-/media/DotCom/etools/pjm-browserless-authentication-guide.pdf
- type: Security
  url: https://www.pjm.com/markets-and-operations/etools/security.aspx
- type: Blog
  url: https://insidelines.pjm.com/
- type: Learning
  url: https://learn.pjm.com/
- type: Support
  url: https://pjm.my.site.com/publicknowledge/s/
- type: LinkedIn
  url: https://www.linkedin.com/company/pjm-interconnection
- type: Legal
  url: https://www.pjm.com/about-pjm/legal
- type: DeveloperPortal
  url: https://apiportal.pjm.com/
- type: APIReference
  url: https://www.pjm.com/-/media/DotCom/etools/data-miner-2/data-miner-2-api-guide.ashx
- type: GettingStarted
  url: https://www.pjm.com/-/media/DotCom/etools/data-miner-2/data-miner-2-getting-started-guide.pdf
- type: FAQ
  url: https://learn.pjm.com/three-priorities/keeping-the-lights-on/data-miner-faqs.aspx
- type: ChangeLog
  url: https://www.pjm.com/markets-and-operations/etools/data-miner-2/data-miner-2-release-notes.aspx
- type: ChangeLog
  name: PJM Data Miner 2 structured changelog
  url: changelog/pjm-changelog.yml
- type: StatusPage
  url: https://www.pjm.com/markets-and-operations/etools/upcoming-changes
- type: Deprecation
  name: Data Miner feed retirement notices
  url: https://www.pjm.com/markets-and-operations/etools/data-miner-2/data-miner-2-release-notes.aspx
- type: Roadmap
  name: PJM Tech Change Forum
  url: https://www.pjm.com/committees-and-groups/forums/tech-change-forum.aspx
- type: Lifecycle
  url: lifecycle/pjm-lifecycle.yml
- type: Authentication
  name: PJM authentication profile
  url: authentication/pjm-authentication.yml
- type: Conventions
  url: conventions/pjm-conventions.yml
- type: ErrorCatalog
  url: errors/pjm-error-catalog.yml
- type: RateLimits
  url: rate-limits/pjm-rate-limits.yml
- type: Sandbox
  url: sandbox/pjm-sandbox.yml
- type: CLI
  url: cli/pjm-cli.yml
- type: Packages
  url: packages/pjm-packages.yml
- type: Conformance
  url: conformance/pjm-conformance.yml
- type: DataModel
  url: data-model/pjm-data-model.yml
- type: Vocabulary
  url: vocabulary/pjm-vocabulary.yml
- type: Examples
  url: examples/_index.yml
- type: JSONSchema
  url: json-schema/pjm-message.json
- type: WellKnown
  url: well-known/pjm-well-known.yml
- type: SecurityTxt
  url: well-known/pjm-security.txt
- type: LLMsTxt
  url: llms/pjm-llms.txt
- type: AgentSkill
  url: skills/_index.yml
- type: Pricing
  name: PJM membership enrollment (fees for commercial data rights)
  url: https://www.pjm.com/about-pjm/member-services/membership-enrollment
- type: TermsOfService
  url: https://www.pjm.com/about-pjm/legal
- type: PrivacyPolicy
  url: https://www.pjm.com/-/media/DotCom/about-pjm/privacy-policy-and-notice.pdf
- type: Glossary
  url: https://www.pjm.com/glossary
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com