aid: midpage
url: https://raw.githubusercontent.com/api-evangelist/midpage/refs/heads/main/apis.yml
name: Midpage
kind: company
description: Midpage is an AI-powered legal research and drafting platform built on
  its own US legal database of millions of court opinions, statutes, and regulations
  spanning federal and state jurisdictions. Its developer products expose this corpus
  through a REST case-law API (semantic, keyword, and hybrid search; opinion retrieval;
  citator treatments), a Model Context Protocol (MCP) server for AI agents, and direct
  SQL read-replica access.
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
tags:
- Legal
- Case Law
- Legal Research
- Search
- AI
created: '2026-06-21'
modified: '2026-06-21'
specificationVersion: '0.19'
apis:
- aid: midpage:case-law-search
  name: Midpage Case Law Search API
  tags:
  - Search
  - Case Law
  - Keyword
  - Hybrid
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://midpage-docs.apidocumentation.com/
  baseURL: https://app.midpage.ai/api/v1
  properties:
  - url: https://midpage-docs.apidocumentation.com/
    type: Documentation
  - url: openapi/midpage-openapi.yml
    type: OpenAPI
  description: Full-text keyword search over US court opinions with Lexis/Westlaw-style
    boolean, phrase, wildcard, and proximity (W/n) operators, plus hybrid search that
    fuses keyword and semantic results with reciprocal rank fusion. Supports filters
    by court, jurisdiction, state, publication status, and date, with optional facet
    breakdowns.
- aid: midpage:document-retrieval
  name: Midpage Document Retrieval API
  tags:
  - Opinions
  - Documents
  - Retrieve
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://midpage-docs.apidocumentation.com/
  baseURL: https://app.midpage.ai/api/v1
  properties:
  - url: https://midpage-docs.apidocumentation.com/
    type: Documentation
  - url: openapi/midpage-openapi.yml
    type: OpenAPI
  description: Retrieve full opinion data by opinion ID, reporter citation, or docket
    number, with bulk reads of up to 100 items per request. Optionally include full
    HTML opinion content and detailed citator treatments via the POST /opinions/get
    endpoint.
- aid: midpage:citations
  name: Midpage Citations API
  tags:
  - Citations
  - Citator
  - Treatments
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://midpage-docs.apidocumentation.com/
  baseURL: https://app.midpage.ai/api/v1
  properties:
  - url: https://midpage-docs.apidocumentation.com/
    type: Documentation
  - url: openapi/midpage-openapi.yml
    type: OpenAPI
  description: Bluebook-style citation lookup and AI-powered citator data returned
    with retrieved opinions - reporter citations, citation counts, an overall treatment
    signal (Negative, Caution, Neutral), and per-citing-opinion treatment detail with
    supporting quotes.
- aid: midpage:semantic-search
  name: Midpage Semantic Search API
  tags:
  - Semantic Search
  - Vector
  - Embeddings
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://midpage-docs.apidocumentation.com/
  baseURL: https://app.midpage.ai/api/v1
  properties:
  - url: https://midpage-docs.apidocumentation.com/
    type: Documentation
  - url: openapi/midpage-openapi.yml
    type: OpenAPI
  description: Vector similarity search over court opinions using AI embeddings, ranking
    results by semantic similarity for conceptual queries. Exposed as the `semantic`
    mode of the POST /search endpoint and combined with keyword search in `hybrid`
    mode.
- aid: midpage:mcp
  name: Midpage MCP Server
  tags:
  - MCP
  - Model Context Protocol
  - Agents
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://www.midpage.ai/integrations
  baseURL: https://app.midpage.ai/mcp/v3
  properties:
  - url: https://www.midpage.ai/integrations
    type: Documentation
  description: Remote Model Context Protocol server (OAuth-authenticated) that gives
    AI assistants like Claude, ChatGPT, and Perplexity source-grounded legal research
    tools - search, findInOpinion, analyzeOpinion, and preview docket tools
    (analyzeDocketReport, analyzeDocketFiling). Versioned tool contracts are served
    at /mcp/v1, /mcp/v2, and /mcp/v3.
common:
- type: LinkedIn
  url: https://www.linkedin.com/company/midpage
- type: Website
  url: https://www.midpage.ai/
- type: Documentation
  url: https://midpage-docs.apidocumentation.com/
- type: Plans
  url: plans/midpage-plans-pricing.yml
- type: RateLimits
  url: rate-limits/midpage-rate-limits.yml
- type: FinOps
  url: finops/midpage-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com