FOLIO

FOLIO Mediated Requests Loans API

The mediatedRequestsLoans API from FOLIO — 5 operation(s) for mediatedrequestsloans.

Documentation GitHub OpenAPI

Operations 5

POST /requests-mediated/loans/check-out-by-barcode Check out by barcode #

POST /requests-mediated/loans/check-in-by-barcode Check in by barcode #

POST /requests-mediated/loans/{loanId}/declare-item-lost Declare item lost #

POST /requests-mediated/loans/{loanId}/claim-item-returned Claim item returned #

POST /requests-mediated/loans/{loanId}/declare-claimed-returned-item-as-missing Declare claimed returned item as missing #

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this

find_apisBrowse and filter every API in the catalog.
get_api_artifactsOne API's artifacts, grouped by type.
get_openapiThe primary OpenAPI for this API.
find_similar_apisAPIs that look like this one.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This API

curl "https://apis.io/api/v1/apis/folio:folio-mediatedrequestsloans-api"

All apis

curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.

OpenAPI Specification

openapi: 3.2.0
info:
  title: Folio Mediated Requests Loans API
  version: v1
  description: 'Operations tagged mediatedRequestsLoans across 2 of this provider''s published API definitions: folio-mod-requests-mediated-openapi.json, folio-mod-requests-mediated-openapi.yml. Each path carries the servers of the definition it was published in.'
tags:
- name: mediatedRequestsLoans
paths:
  /requests-mediated/loans/check-out-by-barcode:
    post:
      description: Check out an item for secure request
      operationId: checkOutByBarcode
      tags:
      - mediatedRequestsLoans
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/check-out-request'
        required: true
      responses:
        '200':
          description: Item was checked out successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/check-out-response'
              example:
                id: d16f0c36-7105-4a46-98e8-736d0e3e7d3e
                userId: 2205005b-ca51-4a04-87fd-938eefa8f6de
                borrower:
                  firstName: psych
                  lastName: rick
                  barcode: '123'
                  patronGroup: 3684a786-6671-4268-8ed0-9db82ebca60b
                itemId: 7212ba6a-8dcf-45a1-be9a-ffaa847c4423
                loanPolicyId: 43198de5-f56a-4a53-a0bd-5a324418967a
                loanPolicy:
                  name: One Hour
                overdueFinePolicyId: cd3f6cac-fa17-4079-9fae-2fb28e521412
                overdueFinePolicy:
                  name: Overdue fine policy
                lostItemPolicyId: ed892c0e-52e0-4cd9-8133-c0ef07b4a709
                lostItemPolicy:
                  name: Lost item fee policy
                item:
                  id: 7212ba6a-8dcf-45a1-be9a-ffaa847c4423
                  title: A semantic web primer
                  barcode: '10101'
                  status:
                    name: Checked out
                  datesOfPublication:
                  - c2004
                  physicalDescriptions:
                  - 'xx, 238 p. : ill. ; 24 cm.'
                  instanceId: 5bf370e0-8cca-4d9c-82e4-5170ab2a0a39
                  callNumberComponents:
                    callNumber: TK5105.88815 . A58 2004 FT MEADE
                  callNumber: TK5105.88815 . A58 2004 FT MEADE
                  materialType:
                    name: book
                  instanceHrid: inst000000000022
                  copyNumber: Copy 2
                  location:
                    name: Main Library
                  holdingsRecordId: e3ff6133-b9a2-4d4c-a1c9-dc1867d4df19
                  contributors:
                  - name: Antoniou, Grigoris
                  - name: Van Harmelen, Frank
                loanDate: '2025-05-16T09:15:48.769+00:00'
                dueDate: '2025-05-16T10:15:48.769+00:00'
                action: checkedout
                feesAndFines:
                  amountRemainingToPay: 0
                metadata:
                  createdDate: '2025-05-16T09:15:50.691+00:00'
                  createdByUserId: b7e131c6-f6d5-424b-935b-089d3704cc55
                  updatedDate: '2025-05-16T09:15:50.691+00:00'
                  updatedByUserId: b7e131c6-f6d5-424b-935b-089d3704cc55
                isDcb: false
                itemEffectiveLocationIdAtCheckOut: fcd64ce1-6995-48f0-840e-89ffa2288371
                checkoutServicePointId: 3a40852d-49fd-4df2-a1f9-6e2641a6e91f
                patronGroupAtCheckout:
                  id: 3684a786-6671-4268-8ed0-9db82ebca60b
                  name: staff
                status:
                  name: Open
        '400':
          $ref: '#/components/responses/badRequestResponse'
        '500':
          $ref: '#/components/responses/internalServerErrorResponse'
      summary: Check out by barcode
      x-summary-source: derived
  /requests-mediated/loans/check-in-by-barcode:
    post:
      description: Check in an item for secure request
      operationId: checkInByBarcode
      tags:
      - mediatedRequestsLoans
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/check-in-request'
        required: true
      responses:
        '200':
          description: Item was checked in successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/check-in-response'
        '400':
          $ref: '#/components/responses/badRequestResponse'
        '422':
          $ref: '#/components/responses/unprocessableEntityResponse'
        '500':
          $ref: '#/components/responses/internalServerErrorResponse'
      summary: Check in by barcode
      x-summary-source: derived
  /requests-mediated/loans/{loanId}/declare-item-lost:
    post:
      description: Declare item lost for a loan
      operationId: declareItemLost
      tags:
      - mediatedRequestsLoans
      parameters:
      - $ref: '#/components/parameters/loanId'
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/declareLostCirculationRequest'
        required: true
      responses:
        '204':
          description: Item successfully declared missing
        '400':
          $ref: '#/components/responses/badRequestResponse'
        '404':
          $ref: '#/components/responses/notFoundResponse'
        '422':
          $ref: '#/components/responses/unprocessableEntityResponse'
        '500':
          $ref: '#/components/responses/internalServerErrorResponse'
      summary: Declare item lost
      x-summary-source: derived
  /requests-mediated/loans/{loanId}/claim-item-returned:
    post:
      description: Claim item returned for a loan
      operationId: claimItemReturned
      tags:
      - mediatedRequestsLoans
      parameters:
      - $ref: '#/components/parameters/loanId'
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/claimItemReturnedCirculationRequest'
        required: true
      responses:
        '204':
          description: Item successfully declared missing
        '400':
          $ref: '#/components/responses/badRequestResponse'
        '404':
          $ref: '#/components/responses/notFoundResponse'
        '422':
          $ref: '#/components/responses/unprocessableEntityResponse'
        '500':
          $ref: '#/components/responses/internalServerErrorResponse'
      summary: Claim item returned
      x-summary-source: derived
  /requests-mediated/loans/{loanId}/declare-claimed-returned-item-as-missing:
    post:
      operationId: declareClaimedReturnedItemAsMissing
      tags:
      - mediatedRequestsLoans
      parameters:
      - $ref: '#/components/parameters/loanId'
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/declareClaimedReturnedItemAsMissingCirculationRequest'
        required: true
      responses:
        '204':
          description: Item successfully declared as missing
        '400':
          $ref: '#/components/responses/badRequestResponse'
        '404':
          $ref: '#/components/responses/notFoundResponse'
        '422':
          $ref: '#/components/responses/unprocessableEntityResponse'
        '500':
          $ref: '#/components/responses/internalServerErrorResponse'
      summary: Declare claimed returned item as missing
      x-summary-source: derived
components:
  schemas:
    parameter:
      description: List of key/value parameters of an error
      type: object
      properties:
        key:
          description: Parameter key
          type: string
        value:
          description: Parameter value
          type: string
    claimItemReturnedCirculationRequest:
      type: object
      description: Request body schema for claim item returned API
      properties:
        itemClaimedReturnedDateTime:
          description: The date and time when the item is to be claimed returned
          type: string
          format: date-time
        comment:
          description: Comment explaining why the item has been claimed returned
          type: string
      additionalProperties: false
      required:
      - itemClaimedReturnedDateTime
    check-in-response:
      type: object
      description: Check-in response
      properties:
        item:
          description: Item data
          type: object
          properties:
            id:
              description: Item ID
              type: string
            instanceId:
              description: Related Instance Id
              type: string
            holdingsRecordId:
              description: Related holding record id
              type: string
            title:
              description: Related title
              type: string
            barcode:
              description: Barcode of the item
              type: string
            inTransitDestinationServicePointId:
              description: Service point an item is intended to be transited to (should only be present when in transit)
              type: string
            inTransitDestinationServicePoint:
              description: Service point an item is intended to be transited to (should only be present when in transit)
              type: object
              properties:
                id:
                  description: The ID of the service point
                  type: string
                name:
                  description: Name of the service point
                  type: string
            location:
              description: Effective location of the item
              type: object
              properties:
                name:
                  description: Name of the location
                  type: string
            enumeration:
              description: Enumeration of the item
              type: string
            volume:
              description: Volume of the item
              type: string
            chronology:
              description: Chronology of the item
              type: string
            displaySummary:
              description: Display summary of the item
              type: string
            copyNumber:
              description: Copy number of the item
              type: string
            callNumber:
              description: Call number of the item
              type: string
          additionalProperties: true
        staffSlipContext:
          description: Staff slips data
          type: object
          properties:
            item:
              description: Staff slips item data
              type: object
              properties:
                title:
                  description: Title of the instance record
                  type: string
                primaryContributor:
                  description: Primary contributor name from the instance record
                  type: string
                allContributors:
                  description: List of contributor names from the instance record concatenated with semicolon
                  type: string
                barcode:
                  description: Barcode of the item
                  type: string
                status:
                  description: Status of the item
                  type: string
                enumeration:
                  description: Enumeration of the item
                  type: string
                volume:
                  description: Volume of the item
                  type: string
                chronology:
                  description: Chronology of the item
                  type: string
                yearCaption:
                  description: Year caption of the item
                  type: string
                materialType:
                  description: Material type of the item
                  type: string
                loanType:
                  description: Loan type of the item
                  type: string
                copy:
                  description: Copy number of the item
                  type: string
                numberOfPieces:
                  description: Number of item pieces
                  type: string
                displaySummary:
                  description: Display summary of the item
                  type: string
                descriptionOfPieces:
                  description: Description of item pieces
                  type: string
                effectiveLocationSpecific:
                  description: Name of the effective location
                  type: string
                effectiveLocationLibrary:
                  description: Library name of the effective location
                  type: string
                effectiveLocationCampus:
                  description: Campus name of the effective location
                  type: string
                effectiveLocationInstitution:
                  description: Institution name of the effective location
                  type: string
                effectiveLocationDiscoveryDisplayName:
                  description: Discovery display name of the effective location
                  type: string
                effectiveLocationPrimaryServicePointName:
                  description: Primary service point name of the effective location
                  type: string
                callNumber:
                  description: Call number of the item
                  type: string
                callNumberPrefix:
                  description: Prefix of the item's call number
                  type: string
                callNumberSuffix:
                  description: Suffix of the item's call number
                  type: string
                lastCheckedInDateTime:
                  description: Last checked in date of the item
                  type: string
                  format: date-time
                toServicePoint:
                  description: Destination service point of the item
                  type: string
                fromServicePoint:
                  description: Last checked in service point of the item
                  type: string
              additionalProperties: true
            requester:
              description: Requester information
              type: object
              properties:
                firstName:
                  type: string
                preferredFirstName:
                  type: string
                lastName:
                  type: string
                middleName:
                  type: string
                barcode:
                  type: string
                patronGroup:
                  type: string
              additionalProperties: true
            request:
              description: Request information
              type: object
              properties:
                requestID:
                  description: Request ID
                  type: string
                servicePointPickup:
                  description: Pickup service point name
                  type: string
                requestDate:
                  description: Date of the request
                  type: string
                  format: date-time
                requestExpirationDate:
                  description: Request expiration date
                  type: string
                  format: date-time
                holdShelfExpirationDate:
                  description: Hold shelf expiration date
                  type: string
                  format: date-time
                additionalInfo:
                  description: Cancellation additional information
                  type: string
                reasonForCancellation:
                  description: Reason for cancellation
                  type: string
                deliveryAddressType:
                  description: Delivery address type name
                  type: string
                patronComments:
                  description: Patron comments
                  type: string
              additionalProperties: true
          additionalProperties: true
        loan:
          description: Links the item with the patron and applies certain conditions based on policies
          type: object
          properties:
            id:
              description: Unique ID of the loan
              type: string
            userId:
              description: Unique ID of the user
              type: string
            item:
              description: Item data
              type: object
              properties:
                id:
                  description: Item ID
                  type: string
                inTransitDestinationServicePointId:
                  description: Service point an item is intended to be transited to (should only be present when in transit)
                  type: string
                inTransitDestinationServicePoint:
                  description: Service point an item is intended to be transited to (should only be present when in transit)
                  type: object
                  properties:
                    id:
                      description: The ID of the service point
                      type: string
                    name:
                      description: Name of the service point
                      type: string
                location:
                  description: Effective location of the item
                  type: object
                  properties:
                    name:
                      description: Name of the location
                      type: string
                instanceId:
                  description: Related Instance Id
                  type: string
                holdingsRecordId:
                  description: Related holding record id
                  type: string
              additionalProperties: true
            borrower:
              description: Borrower information
              type: object
              properties:
                firstName:
                  type: string
                preferredFirstName:
                  type: string
                lastName:
                  type: string
                middleName:
                  type: string
                barcode:
                  type: string
                patronGroup:
                  type: string
              additionalProperties: true
          additionalProperties: true
    declareClaimedReturnedItemAsMissingCirculationRequest:
      type: object
      description: Request body schema for for resolving claim as missing API
      properties:
        comment:
          description: Comment explaining why the item is claimed missing
          type: string
      additionalProperties: false
      required:
      - comment
    errors:
      description: A set of errors
      type: object
      properties:
        errors:
          description: List of errors
          id: errors
          type: array
          items:
            type: object
            $ref: '#/components/schemas/error'
        total_records:
          description: Total number of errors
          type: integer
      additionalProperties: false
    check-out-response:
      type: object
      description: Check-out response
      properties:
        id:
          description: Unique ID (generated UUID) of the loan
          type: string
        userId:
          description: ID of the patron the item was lent to. Required for open loans, not required for closed loans (for anonymization).
          type: string
        borrower:
          description: Additional information about the borrower of the item, taken from the user referred to by the userId
          type: object
          properties:
            firstName:
              description: First name of the borrower (read-only, defined by the server)
              type: string
            lastName:
              description: Last name of the borrower (read-only, defined by the server)
              type: string
            middleName:
              description: Middle name of the borrower (read-only, defined by the server)
              type: string
            barcode:
              description: Barcode used to identify the borrower (read-only, defined by the server)
              type: string
            preferredFirstName:
              description: Preferred first name of the borrower (read-only, defined by the server)
              type: string
            patronGroup:
              description: Current patron group of the borrower (read-only, defined by the server)
              type: string
          additionalProperties: true
        proxyUserId:
          description: ID of the user representing a proxy for the patron
          type: string
        itemId:
          description: ID of the item lent to the patron
          type: string
        loanPolicyId:
          description: ID of last policy used in relation to this loan
          type: string
        loanPolicy:
          description: Additional information about the loan policy of the item, taken from the loanPolicyId
          type: object
          properties:
            name:
              description: Name of last policy used in relation to this loan (read-only, defined by the server)
              type: string
          additionalProperties: true
        overdueFinePolicyId:
          description: ID of last overdue fine policy used in relation to this loan
          type: string
        overdueFinePolicy:
          description: Additional information about the overdue fine policy of the item
          type: object
          properties:
            name:
              description: Name of last overdue fine policy used (read-only, defined by the server)
              type: string
          additionalProperties: true
        lostItemPolicyId:
          description: ID of last lost item policy used in relation to this loan
          type: string
        lostItemPolicy:
          description: Additional information about the lost item policy
          type: object
          properties:
            name:
              description: Name of last lost item policy used (read-only, defined by the server)
              type: string
          additionalProperties: true
        item:
          description: Additional information about the item
          type: object
          properties:
            id:
              description: ID of the item
              type: string
            title:
              description: The title of the item lent to the patron
              type: string
            barcode:
              description: The barcode of the item
              type: string
            status:
              description: Overall status of the item
              type: object
              properties:
                name:
                  description: Name of the item status
                  type: string
                date:
                  description: Date time when status was last changed
                  type: string
                  format: date-time
              additionalProperties: true
          additionalProperties: true
        loanDate:
          description: Date and time when the loan began
          type: string
          format: date-time
        dueDate:
          description: Date and time when the item is due to be returned
          type: string
          format: date-time
        returnDate:
          description: Date and time when the item was returned
          type: string
          format: date-time
        action:
          description: Last action performed on a loan (e.g., checkedout, checkedin)
          type: string
        renewalCount:
          description: Count of how many times a loan has been renewed
          type: integer
          minimum: 0
        feesAndFines:
          description: Fees and fines associated with loans
          type: object
          properties:
            amountRemainingToPay:
              description: Total remaining amount due on fees and fines for the loan (read-only, defined by the server)
              type: number
          additionalProperties: true
        metadata:
          description: Metadata about creation and changes to loan, provided by the server (client should not provide)
          type: object
      additionalProperties: true
    declareLostCirculationRequest:
      type: object
      description: Request body schema for declare item lost API
      properties:
        declaredLostDateTime:
          description: The date and time when the item is to be declared lost
          type: string
          format: date-time
        comment:
          description: Comment explaining why the item has been declared lost
          type: string
        servicePointId:
          description: Current service point, where the item is being declared lost
          type: string
          format: uuid
      required:
      - declaredLostDateTime
      - servicePointId
    check-in-request:
      type: object
      description: Check-in request
      properties:
        itemBarcode:
          description: Item barcode
          type: string
        servicePointId:
          description: ID of the service point where item is being checked-in
          type: string
          format: uuid
        checkInDate:
          description: Date and time of item check-in
          type: string
          format: date-time
        claimedReturnedResolution:
          description: Describes how the library resolved the situation where the item was claimed returned
          type: string
        sessionId:
          description: Randomly generated UUID which must be the same for all check-in requests issued in scope of the same check-in session
          type: string
          format: uuid
      required:
      - itemBarcode
      - servicePointId
      - checkInDate
    error:
      description: An error
      type: object
      properties:
        message:
          type: string
          description: Error message text
        type:
          type: string
          description: Error message type
        code:
          type: string
          description: Error message code
        parameters:
          type: object
          description: Error message parameters
          $ref: '#/components/schemas/parameters'
      additionalProperties: false
      required:
      - message
    parameters:
      description: List of key/value parameters of an error
      type: array
      items:
        type: object
        $ref: '#/components/schemas/parameter'
    check-out-request:
      type: object
      description: Check-out request
      properties:
        itemBarcode:
          description: Barcode of the item to be lent to the patron
          type: string
        userBarcode:
          description: Barcode of the user (representing the patron) the item is to be lent to
          type: string
        proxyUserBarcode:
          description: Barcode of the user representing a proxy for the patron
          type: string
        loanDate:
          description: When the loan is to begin, defaults to current date and time
          type: string
          format: date-time
        servicePointId:
          description: Service point where the item has been checked out
          type: string
          format: uuid
        forceLoanPolicyId:
          description: Force loan policy ID
          type: string
          format: uuid
        overrideBlocks:
          description: Blocks to override
          type: object
          properties:
            itemNotLoanableBlock:
              description: '''Item not loanable'' block'
              type: object
              properties:
                dueDate:
                  description: Due date for a new loan
                  type: string
                  format: date-time
              required:
              - dueDate
            patronBlock:
              description: Automated patron block
              type: object
            itemLimitBlock:
              description: Item limit block
              type: object
            renewalBlock:
              description: Renewal block
              type: object
            renewalDueDateRequiredBlock:
              description: Override renewal block which requires due date field
              type: object
              properties:
                dueDate:
                  description: Due date for a new loan
                  type: string
                  format: date-time
              required:
              - dueDate
            comment:
              description: Reason for override
              type: string
      required:
      - itemBarcode
      - userBarcode
      - servicePointId
  responses:
    internalServerErrorResponse:
      description: When unhandled exception occurred during code execution, e.g. NullPointerException
      content:
        application/json:
          example:
            errors:
            - message: Unexpected error
            total_records: 1
          schema:
            $ref: '#/components/schemas/errors'
    notFoundResponse:
      description: Not found
      content:
        application/json:
          example:
            errors:
            - message: Request not found
            total_records: 1
          schema:
            $ref: '#/components/schemas/errors'
    unprocessableEntityResponse:
      description: Validation errors
      content:
        application/json:
          example:
            errors:
            - message: Validation failed
            total_records: 1
          schema:
            $ref: '#/components/schemas/errors'
    badRequestResponse:
      description: Invalid request response
      content:
        application/json:
          example:
            errors:
            - message: Request is invalid
            total_records: 1
          schema:
            $ref: '#/components/schemas/errors'
  parameters:
    loanId:
      name: loanId
      in: path
      required: true
      schema:
        type: string
        format: uuid
x-refined-from:
- folio-mod-requests-mediated-openapi.json
- folio-mod-requests-mediated-openapi.yml

FOLIO Mediated Requests Loans API

Operations 5

Documentation

Specifications

SDKs

Schemas & Data

Other Resources