Ambolt DOI API
The DOI API from Ambolt — 1 operation(s) for doi.
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curl "https://apis.io/api/v1/apis/ambolt-dev:ambolt-dev-doi-api"
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OpenAPI Specification
openapi: 3.2.0
info:
title: Ambolt data tools DOI API
version: 0.1.1
description: Pay-per-call data endpoints using the x402 protocol (USDC on Base, Polygon and Solana). Failed calls are not charged.
x-guidance: 'Call GET /v1/<tool> with the documented query parameters. Without payment the response is 402 with the price and payment requirements; an x402 client pays in USDC and retries. Add free=1 for one free call per tool and IP per day. Company, tender, document, rates, on-chain and web tools; every response carries source and date. The same tools are available as MCP tools at /mcp (free, 30 requests a minute) and as Apify Actors. Company-level data only: no personal data.'
contact:
email: hello@ambolt.dev
url: https://ambolt.dev
servers:
- url: https://api.ambolt.dev
security: []
tags:
- name: DOI
paths:
/v1/doi-lookup:
get:
operationId: doi_lookup
summary: 'DOI Lookup: Paper Metadata and Citation Counts'
description: 'Scholarly metadata by DOI, or a best-match search by citation text: title, authors, journal, year, publisher, citation count, licence links and URL. Bibliographic facts only.'
tags:
- DOI
parameters:
- name: doi
in: query
required: false
schema:
type: string
maxLength: 200
pattern: ^10\.\d{4,9}/\S+$
description: DOI, e.g. 10.1038/nature14539.
description: DOI, e.g. 10.1038/nature14539.
- name: query
in: query
required: false
schema:
type: string
maxLength: 300
description: Citation or title text to search when no DOI is known.
description: Citation or title text to search when no DOI is known.
- name: limit
in: query
required: false
schema:
type: integer
minimum: 1
maximum: 20
default: 5
description: Maximum search results.
description: Maximum search results.
- name: free
in: query
required: false
schema:
type: string
enum:
- '1'
description: Set to 1 for one free call per tool and IP address per day (no payment).
x-payment-info:
price:
mode: fixed
currency: USD
amount: '0.003000'
protocols:
- x402: {}
responses:
'200':
description: Result (JSON). Every result names its source and the time it was read.
content:
application/json:
schema:
type: object
'400':
description: Invalid input; not charged.
'402':
description: 'Payment required: 0.003 USD in USDC (x402 v2).'