generated: '2026-07-27'
method: searched
status: candidate
description: >-
  ERCOT publishes no first-party MCP server. Searching the developer portal, the ERCOT GitHub
  organization and the npm registry turns up no ERCOT-operated hosted or stdio MCP endpoint, and no
  agent/LLM guidance of any kind on developer.ercot.com. What does exist is a real third-party MCP
  server on npm — @missionsquad/mcp-ercot — which wraps the ERCOT Public Data API's Day-Ahead and
  Real-Time market endpoints as 34 MCP tools using a TypeScript client generated from ERCOT's own
  OpenAPI. It is recorded here as an ecosystem fact, not as an ERCOT product. The candidate tool
  surface below is derived from the OpenAPI as the shape an official ERCOT server would take.
official_server: null
server:
  name: ercot-public-data
  transport: null
  url: null
  published: false
  note: candidate design only — no ERCOT-hosted MCP endpoint exists.
third_party_servers:
- name: '@missionsquad/mcp-ercot'
  publisher: Mission Squad AI
  registry: npm
  url: https://www.npmjs.com/package/@missionsquad/mcp-ercot
  version: 1.0.2
  transport: stdio
  official: false
  tool_count: 34
  scope: Day-Ahead Market (DAM) and Real-Time Market (RTM) price, ancillary-service and 60-day disclosure endpoints.
  auth: >-
    Passes through ERCOT's two-credential model — ERCOT_USERNAME / ERCOT_PASSWORD mint the hourly
    B2C ID token, ERCOT_SUBSCRIPTION_KEY supplies the Ocp-Apim-Subscription-Key header.
  implementation: TypeScript client generated by openapi-typescript from the ERCOT OpenAPI, served with @missionsquad/fastmcp.
  crosswalk: mcp/ercot-tool-crosswalk.yml
candidate_tool_design:
  rationale: >-
    A first-party ERCOT MCP server would not want 106 near-identical getData tools. The API's own
    structure suggests a far smaller catalog-driven surface: discover the product, discover its
    fields, then query it. The four generic tools below cover the entire estate; the 34 named tools
    in the third-party server are effectively pre-bound instances of query_report.
  tools:
  - name: list_emil_products
    description: List every available EMIL data product with its artifacts and endpoints.
    source_operation: openapi/ercot-public-data-api-openapi.json#getListForProducts
  - name: get_emil_product
    description: Get one EMIL product's metadata and the report artifacts it exposes.
    source_operation: openapi/ercot-public-data-api-openapi.json#getProduct
  - name: query_report
    description: >-
      Query any EMIL report artifact with paging (page, size, sort, dir) and the product's typed
      range filters; the response's fields[] dictionary describes the returned columns.
    source_operation: 'openapi/ercot-public-data-api-openapi.json#getData … getData_101 (102 operations)'
  - name: list_product_archives
    description: List the historic archive files for an EMIL product (at least seven years retained).
    source_operation: openapi/ercot-public-data-api-openapi.json#getProductHistory
  - name: get_api_version
    description: Return the running Public Data API version and build.
    source_operation: openapi/ercot-public-data-api-openapi.json#getVersion
agent_considerations:
- Two credentials are required on every call; the ID token expires hourly and cannot be refreshed, so a server must re-mint it.
- 30 requests per minute is a hard ceiling — an agent fanning out across products will trip it quickly.
- Requests from outside the United States are blocked at the edge.
- data[] is untyped in the spec; agents must read fields[] to interpret rows.
- Market time is America/Chicago; DSTFlag and repeatHourFlag disambiguate the repeated fall-back hour.