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Diffbot Web Search API

Search Diffbot's own web index — the largest independently crawled index outside Google and Bing, over 150TB. Candidates are retrieved and reranked by a cross-encoder trained to favour factual relevance over popularity and primary sources over secondary ones, and the most relevant chunk of each page is returned inline for citation. This is the one Diffbot surface that authenticates with an Authorization Bearer header rather than a token query parameter.

Diffbot Web Search API is one of 10 APIs that Diffbot publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

Tagged areas include Search, Web, Index, and Retrieval. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, and an API reference.

This API exposes 2 operations across 1 path, and defines 3 schemas. It is described by OpenAPI 3.0.0, at version 1.0.0.

Requests are made against a single base URL, https://llm.diffbot.com/api/v1/web_search.

2 operations 1 paths 3 schemas 1 GET1 POST

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.0.0
API Version
1.0.0
Base URL
https://llm.diffbot.com/api/v1/web_search
Authentication
HTTP Bearer
Resource Areas
1

Authentication & Security 1

Diffbot Web Search API declares 1 security scheme for authenticating requests. It accepts HTTP bearer tokens (Authorization). By default, every request must be authenticated.

  • Authorization — Diffbot API Token

Paths & Operations 2

Across 1 path, the API surfaces 2 operations — 1 GET, 1 POST. Each is listed below with its method, path, parameters, and response codes.

Operations 2
GET
/
Run a Web Search
get_ 3 params → 200400401
POST
/
Run a Web Search
post_ body → 200400401

Schemas 3

The contract defines 3 schemas that model the data the API accepts and returns. Each schema is shown below with its type and property counts.

Query
array
Your search query. Use the following operators to refine your search. | Operator | Description | Example | | --- | --- | --- | | after | Documents published af…
Size
number
Number of results to return in the search response
MaxTokens
number
Cap the search response to this value. Highlight chunks will be reduced in length equitably.

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

diffbot-web-search-openapi.json Raw ↑

Other APIs Diffbot publishes across the network.

Diffbot Extract API
Diffbot Crawl API
Diffbot Bulk Extract API
Diffbot DQL API
Diffbot Enhance API
Diffbot Natural Language API
Diffbot Account API
Diffbot Knowledge Graph API
Diffbot Crawl/Bulk Job API
Where this information came from

This is an independent, third-party profile of Diffbot Web Search API, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.

The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.

Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.

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