fourzerotwo-si

fourzerotwo-si Scholarly API

Scholarly Works (OpenAlex): Search 250M+ papers, authors, institutions, journals and topics with citation counts.

Documentation GitHub OpenAPI

Operations 9

GET /v1/scholarly/works-search Scholarly Works (OpenAlex): Search papers #

GET /v1/scholarly/work Scholarly Works (OpenAlex): Paper by id or DOI #

GET /v1/scholarly/authors-search Scholarly Works (OpenAlex): Search authors #

GET /v1/scholarly/author Scholarly Works (OpenAlex): Author #

GET /v1/scholarly/institutions-search Scholarly Works (OpenAlex): Search institutions #

GET /v1/scholarly/sources-search Scholarly Works (OpenAlex): Search journals #

GET /v1/scholarly/topics-search Scholarly Works (OpenAlex): Search topics #

GET /v1/scholarly/autocomplete Scholarly Works (OpenAlex): Autocomplete works #

GET /v1/scholarly/citing-works Scholarly Works (OpenAlex): Papers citing a paper #

Specifications

⚙

OpenAPI

https://artifacts.apis.io/fourzerotwo-si/openapi/fourzerotwo-si-scholarly-api-openapi.yml

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OpenAPI Specification

openapi: 3.2.0
info:
  title: Fourzerotwo Si Scholarly API
  version: 1.1.0
  contact:
    url: https://fourzerotwo.si
  description: 'Operations tagged scholarly across 2 of this provider''s published API definitions: openapi.json, fourzerotwo-si-openapi.json. Each path carries the servers of the definition it was published in.'
servers:
- url: https://fourzerotwo.si
tags:
- name: scholarly
  description: 'Scholarly Works (OpenAlex): Search 250M+ papers, authors, institutions, journals and topics with citation counts.'
paths:
  /v1/scholarly/works-search:
    get:
      operationId: scholarly__works_search
      summary: 'Scholarly Works (OpenAlex): Search papers'
      description: 'Full-text search of scholarly works, with citations, authors and open-access links. Price: $0.003 USDC per call via x402. Free within the daily allowance with a free key.'
      tags:
      - scholarly
      externalDocs:
        url: https://fourzerotwo.si/apis/scholarly/works-search
      parameters:
      - name: search
        in: query
        required: true
        description: Query
        schema:
          type: string
        example: large language model agents
      responses:
        '200':
          description: The data (paid, or free tier).
          content:
            application/json: {}
        '402':
          $ref: '#/components/responses/PaymentRequired'
        '400':
          $ref: '#/components/responses/Error'
        '404':
          $ref: '#/components/responses/Error'
        '502':
          $ref: '#/components/responses/Error'
      security:
      - {}
      - freeKey: []
      x-price-usd: '0.003000'
      x-free-tier: free
      x-mcp-tool: scholarly__works-search
    servers:
    - url: https://fourzerotwo.si
  /v1/scholarly/work:
    get:
      operationId: scholarly__work
      summary: 'Scholarly Works (OpenAlex): Paper by id or DOI'
      description: 'One work by OpenAlex id (W…) or "doi:10.…". Price: $0.002 USDC per call via x402. Free within the daily allowance with a free key.'
      tags:
      - scholarly
      externalDocs:
        url: https://fourzerotwo.si/apis/scholarly/work
      parameters:
      - name: id
        in: query
        required: true
        description: OpenAlex id or doi:…
        schema:
          type: string
        example: doi:10.1038/nature14539
      responses:
        '200':
          description: The data (paid, or free tier).
          content:
            application/json: {}
        '402':
          $ref: '#/components/responses/PaymentRequired'
        '400':
          $ref: '#/components/responses/Error'
        '404':
          $ref: '#/components/responses/Error'
        '502':
          $ref: '#/components/responses/Error'
      security:
      - {}
      - freeKey: []
      x-price-usd: '0.002000'
      x-free-tier: free
      x-mcp-tool: scholarly__work
    servers:
    - url: https://fourzerotwo.si
  /v1/scholarly/authors-search:
    get:
      operationId: scholarly__authors_search
      summary: 'Scholarly Works (OpenAlex): Search authors'
      description: 'Researchers by name with h-index, works and citation counts. Price: $0.002 USDC per call via x402. Free within the daily allowance with a free key.'
      tags:
      - scholarly
      externalDocs:
        url: https://fourzerotwo.si/apis/scholarly/authors-search
      parameters:
      - name: search
        in: query
        required: true
        description: Author name
        schema:
          type: string
        example: Geoffrey Hinton
      responses:
        '200':
          description: The data (paid, or free tier).
          content:
            application/json: {}
        '402':
          $ref: '#/components/responses/PaymentRequired'
        '400':
          $ref: '#/components/responses/Error'
        '404':
          $ref: '#/components/responses/Error'
        '502':
          $ref: '#/components/responses/Error'
      security:
      - {}
      - freeKey: []
      x-price-usd: '0.002000'
      x-free-tier: free
      x-mcp-tool: scholarly__authors-search
    servers:
    - url: https://fourzerotwo.si
  /v1/scholarly/author:
    get:
      operationId: scholarly__author
      summary: 'Scholarly Works (OpenAlex): Author'
      description: 'One researcher by OpenAlex id or ORCID. Price: $0.002 USDC per call via x402. Free within the daily allowance with a free key.'
      tags:
      - scholarly
      externalDocs:
        url: https://fourzerotwo.si/apis/scholarly/author
      parameters:
      - name: id
        in: query
        required: true
        description: OpenAlex id or orcid:…
        schema:
          type: string
        example: A5108093963
      responses:
        '200':
          description: The data (paid, or free tier).
          content:
            application/json: {}
        '402':
          $ref: '#/components/responses/PaymentRequired'
        '400':
          $ref: '#/components/responses/Error'
        '404':
          $ref: '#/components/responses/Error'
        '502':
          $ref: '#/components/responses/Error'
      security:
      - {}
      - freeKey: []
      x-price-usd: '0.002000'
      x-free-tier: free
      x-mcp-tool: scholarly__author
    servers:
    - url: https://fourzerotwo.si
  /v1/scholarly/institutions-search:
    get:
      operationId: scholarly__institutions_search
      summary: 'Scholarly Works (OpenAlex): Search institutions'
      description: 'Universities and research institutions with output stats. Price: $0.002 USDC per call via x402. Free within the daily allowance with a free key.'
      tags:
      - scholarly
      externalDocs:
        url: https://fourzerotwo.si/apis/scholarly/institutions-search
      parameters:
      - name: search
        in: query
        required: true
        description: Institution
        schema:
          type: string
        example: University of Kent
      responses:
        '200':
          description: The data (paid, or free tier).
          content:
            application/json: {}
        '402':
          $ref: '#/components/responses/PaymentRequired'
        '400':
          $ref: '#/components/responses/Error'
        '404':
          $ref: '#/components/responses/Error'
        '502':
          $ref: '#/components/responses/Error'
      security:
      - {}
      - freeKey: []
      x-price-usd: '0.002000'
      x-free-tier: free
      x-mcp-tool: scholarly__institutions-search
    servers:
    - url: https://fourzerotwo.si
  /v1/scholarly/sources-search:
    get:
      operationId: scholarly__sources_search
      summary: 'Scholarly Works (OpenAlex): Search journals'
      description: 'Journals and repositories with impact stats. Price: $0.002 USDC per call via x402. Free within the daily allowance with a free key.'
      tags:
      - scholarly
      externalDocs:
        url: https://fourzerotwo.si/apis/scholarly/sources-search
      parameters:
      - name: search
        in: query
        required: true
        description: Journal
        schema:
          type: string
        example: Nature
      responses:
        '200':
          description: The data (paid, or free tier).
          content:
            application/json: {}
        '402':
          $ref: '#/components/responses/PaymentRequired'
        '400':
          $ref: '#/components/responses/Error'
        '404':
          $ref: '#/components/responses/Error'
        '502':
          $ref: '#/components/responses/Error'
      security:
      - {}
      - freeKey: []
      x-price-usd: '0.002000'
      x-free-tier: free
      x-mcp-tool: scholarly__sources-search
    servers:
    - url: https://fourzerotwo.si
  /v1/scholarly/topics-search:
    get:
      operationId: scholarly__topics_search
      summary: 'Scholarly Works (OpenAlex): Search topics'
      description: 'Research topics and fields. Price: $0.002 USDC per call via x402. Free within the daily allowance with a free key.'
      tags:
      - scholarly
      externalDocs:
        url: https://fourzerotwo.si/apis/scholarly/topics-search
      parameters:
      - name: search
        in: query
        required: true
        description: Topic
        schema:
          type: string
        example: quantum computing
      responses:
        '200':
          description: The data (paid, or free tier).
          content:
            application/json: {}
        '402':
          $ref: '#/components/responses/PaymentRequired'
        '400':
          $ref: '#/components/responses/Error'
        '404':
          $ref: '#/components/responses/Error'
        '502':
          $ref: '#/components/responses/Error'
      security:
      - {}
      - freeKey: []
      x-price-usd: '0.002000'
      x-free-tier: free
      x-mcp-tool: scholarly__topics-search
    servers:
    - url: https://fourzerotwo.si
  /v1/scholarly/autocomplete:
    get:
      operationId: scholarly__autocomplete
      summary: 'Scholarly Works (OpenAlex): Autocomplete works'
      description: 'Fast title autocomplete across works. Price: $0.001 USDC per call via x402. Free within the daily allowance with a free key.'
      tags:
      - scholarly
      externalDocs:
        url: https://fourzerotwo.si/apis/scholarly/autocomplete
      parameters:
      - name: q
        in: query
        required: true
        description: Partial title
        schema:
          type: string
        example: attention is all
      responses:
        '200':
          description: The data (paid, or free tier).
          content:
            application/json: {}
        '402':
          $ref: '#/components/responses/PaymentRequired'
        '400':
          $ref: '#/components/responses/Error'
        '404':
          $ref: '#/components/responses/Error'
        '502':
          $ref: '#/components/responses/Error'
      security:
      - {}
      - freeKey: []
      x-price-usd: '0.001000'
      x-free-tier: free
      x-mcp-tool: scholarly__autocomplete
    servers:
    - url: https://fourzerotwo.si
  /v1/scholarly/citing-works:
    get:
      operationId: scholarly__citing_works
      summary: 'Scholarly Works (OpenAlex): Papers citing a paper'
      description: 'Works that cite a given OpenAlex work id. Price: $0.003 USDC per call via x402. Free within the daily allowance with a free key.'
      tags:
      - scholarly
      externalDocs:
        url: https://fourzerotwo.si/apis/scholarly/citing-works
      parameters:
      - name: work
        in: query
        required: true
        description: Filter, e.g. cites:W2919115771
        schema:
          type: string
        example: cites:W2919115771
      responses:
        '200':
          description: The data (paid, or free tier).
          content:
            application/json: {}
        '402':
          $ref: '#/components/responses/PaymentRequired'
        '400':
          $ref: '#/components/responses/Error'
        '404':
          $ref: '#/components/responses/Error'
        '502':
          $ref: '#/components/responses/Error'
      security:
      - {}
      - freeKey: []
      x-price-usd: '0.003000'
      x-free-tier: free
      x-mcp-tool: scholarly__citing-works
    servers:
    - url: https://fourzerotwo.si
components:
  responses:
    PaymentRequired:
      description: x402 payment required. The body (also base64 in the PAYMENT-REQUIRED header) lists accepted payments.
      headers:
        PAYMENT-REQUIRED:
          schema:
            type: string
          description: Base64 JSON x402 v2 PaymentRequired
      content:
        application/json:
          schema:
            type: object
            properties:
              x402Version:
                type: integer
              error:
                type: string
              accepts:
                type: array
                items:
                  type: object
    Error:
      description: 400 = invalid input, 404 = not found at the source, 502 = the source failed. Never charged.
      content:
        application/json:
          schema:
            type: object
            properties:
              error:
                type: string
              charged:
                type: boolean
  securitySchemes:
    freeKey:
      type: apiKey
      in: header
      name: X-API-Key
      description: Optional free key (fzt_…) for the free tier.
x-refined-from:
- openapi.json
- fourzerotwo-si-openapi.json