Open Textbook Library by Subject: Textbooks Filed Under One Subject

opentextbooklibrary/subject-textbooks

List the Open Textbook Library (open.umn.edu) textbooks filed under one subject, 10 per page: id, title, edition, ISBNs, the textbook's own licence, language, description, contributors, subjects, publishers, links by format, average rating and review count. Give a subject id from the subjects tool (for example 18 for Accounting, 61 for Databases) and optionally a page; `links.total_count` gives the number of textbooks. Reviewer comments are not included. About 50 KB per page. A subject id the library does not hold is refused as invalid input. Catalogue records (CC0), served by Eden Engine; not an official Open Textbook Library product.

activeper callv1

Price

$0.0026 per call

You pay the price shown. If a call turns out to cost more than its quote, you pay the actual price, capped at twice the quote. No monthly minimum. Top-ups start at $0.50.

Data source

Open Textbook Library (Open Education Network, University of Minnesota)

Catalogue records from the Open Textbook Library (Open Education Network, University of Minnesota Libraries), released as public domain under CC0; the `license` field of each record is the licence of the textbook itself, not of the record. Reviewer comments are not included. Served by Eden Engine; not an official Open Textbook Library product.

Use it

Five steps: search, inspect, learn, run, settle. No per-tool setup; your agent reaches this tool through the meta-tools it already has.

Connect once and your AI can find and run this tool, and any other it needs.

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agent

// 1. search: find the tool
omnial_search({ query: "what you need" })

// 2. inspect: price and input schema
omnial_inspect({ tool: "opentextbooklibrary/subject-textbooks" })

// 3. learn: read the usage guide at runtime
omnial_learn({ tool: "opentextbooklibrary/subject-textbooks" })

// 4. run: price the exact call first, then run it
omnial_execute({ tool: "opentextbooklibrary/subject-textbooks", input: { /* see input_schema */ }, dry_run: true })
omnial_execute({ tool: "opentextbooklibrary/subject-textbooks", input: { /* ... */ } })

// 5. settle: the call is charged when it finishes, nothing to do

Not connected yet? Point your MCP client at https://mcp.eden-engine.com/mcp, then copy a config for your client.

Pricing

Every charge this tool can incur.

Charge	Price
Per call	$0.0026

Updated: Oct 21, 2026

Input and output schemas

Input schema

input_schema.json

{
  "type": "object",
  "required": [
    "subject_id"
  ],
  "properties": {
    "page": {
      "type": "integer",
      "maximum": 500,
      "minimum": 1,
      "description": "Page number, 1-based, 10 textbooks per page; defaults to 1."
    },
    "subject_id": {
      "type": "integer",
      "maximum": 100000,
      "minimum": 1,
      "description": "A subject id from the subjects tool, for example 18 (Accounting) or 61 (Databases)."
    }
  },
  "additionalProperties": false
}

Output schema

output_schema.json

{
  "type": "object",
  "required": [
    "data"
  ],
  "properties": {
    "data": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "id",
          "title"
        ],
        "properties": {
          "id": {
            "type": "integer"
          },
          "url": {
            "type": "string",
            "description": "The book's page in the library."
          },
          "title": {
            "type": "string"
          },
          "isbn10": {
            "type": [
              "string",
              "null"
            ]
          },
          "isbn13": {
            "type": [
              "string",
              "null"
            ]
          },
          "rating": {
            "type": [
              "string",
              "null"
            ],
            "description": "Average review rating out of 5, as text."
          },
          "volume": {
            "type": [
              "string",
              "null"
            ]
          },
          "formats": {
            "type": "array",
            "items": {
              "type": "object",
              "additionalProperties": true
            },
            "description": "Ways to read or download the book: type, url, price."
          },
          "license": {
            "type": [
              "string",
              "null"
            ],
            "description": "The licence of the TEXTBOOK (for example Attribution or Attribution-NonCommercial-ShareAlike), not of the catalogue record."
          },
          "language": {
            "type": [
              "string",
              "null"
            ]
          },
          "subjects": {
            "type": "array",
            "items": {
              "type": "object",
              "additionalProperties": true
            }
          },
          "publishers": {
            "type": "array",
            "items": {
              "type": "object",
              "additionalProperties": true
            }
          },
          "updated_at": {
            "type": "string"
          },
          "description": {
            "type": [
              "string",
              "null"
            ]
          },
          "contributors": {
            "type": "array",
            "items": {
              "type": "object",
              "additionalProperties": true
            },
            "description": "Authors and other contributors."
          },
          "copyright_year": {
            "type": [
              "integer",
              "null"
            ]
          },
          "edition_statement": {
            "type": [
              "string",
              "null"
            ]
          },
          "accessibility_features": {
            "type": "array",
            "items": {
              "type": "string"
            }
          },
          "textbook_reviews_count": {
            "type": [
              "integer",
              "null"
            ]
          },
          "accessibility_statement": {
            "type": [
              "string",
              "null"
            ]
          }
        },
        "description": "One textbook catalogue record, without reviews.",
        "additionalProperties": true
      }
    },
    "links": {
      "type": "object",
      "description": "Paging links: `self`, `next`, `prev`, `total_pages`, `total_count`.",
      "additionalProperties": true
    }
  },
  "description": "One page of up to 10 textbook records.",
  "additionalProperties": true
}