fourzerotwo-si Pubmed API
PubMed: Search 37M+ biomedical citations and fetch article summaries from PubMed.
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OpenAPI Specification
openapi: 3.2.0
info:
title: Fourzerotwo Si Pubmed API
version: 1.1.0
contact:
url: https://fourzerotwo.si
description: 'Operations tagged pubmed 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: pubmed
description: 'PubMed: Search 37M+ biomedical citations and fetch article summaries from PubMed.'
paths:
/v1/pubmed/search:
get:
operationId: pubmed__search
summary: 'PubMed: Search PubMed'
description: 'PubMed ids matching a query (supports PubMed query syntax). Price: $0.002 USDC per call via x402. 3 free calls/day with a free key.'
tags:
- pubmed
externalDocs:
url: https://fourzerotwo.si/apis/pubmed/search
parameters:
- name: term
in: query
required: true
description: Query
schema:
type: string
example: GLP-1 obesity randomized
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: sample
x-mcp-tool: pubmed__search
servers:
- url: https://fourzerotwo.si
/v1/pubmed/summary:
get:
operationId: pubmed__summary
summary: 'PubMed: Article summaries'
description: 'Title, authors, journal, date and DOI for comma-separated PubMed ids. Price: $0.002 USDC per call via x402. 3 free calls/day with a free key.'
tags:
- pubmed
externalDocs:
url: https://fourzerotwo.si/apis/pubmed/summary
parameters:
- name: id
in: query
required: true
description: PMIDs, comma separated
schema:
type: string
example: 38000000,37000000
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: sample
x-mcp-tool: pubmed__summary
servers:
- url: https://fourzerotwo.si
/v1/pubmed/pmc-search:
get:
operationId: pubmed__pmc_search
summary: 'PubMed: Search PubMed Central'
description: 'Free full-text article ids in PubMed Central. Price: $0.002 USDC per call via x402. 3 free calls/day with a free key.'
tags:
- pubmed
externalDocs:
url: https://fourzerotwo.si/apis/pubmed/pmc-search
parameters:
- name: term
in: query
required: true
description: Query
schema:
type: string
example: CRISPR therapy
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: sample
x-mcp-tool: pubmed__pmc-search
servers:
- url: https://fourzerotwo.si
/v1/pubmed/clinical-trials-search:
get:
operationId: pubmed__clinical_trials_search
summary: 'PubMed: Search clinical trial records'
description: 'PubMed citations that are clinical trial reports for a query. Price: $0.002 USDC per call via x402. 3 free calls/day with a free key.'
tags:
- pubmed
externalDocs:
url: https://fourzerotwo.si/apis/pubmed/clinical-trials-search
parameters:
- name: term
in: query
required: true
description: Query with [pt] filter
schema:
type: string
example: semaglutide AND clinical trial[pt]
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: sample
x-mcp-tool: pubmed__clinical-trials-search
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