Diffblue

Diffblue provides AI-driven testing agents that automatically generate unit tests for enterprise Java codebases. Their platform orchestrates AI coding tools to deliver high‑coverage, verified tests at scale, reducing developer toil and improving software quality. Diffblue’s solutions include the Testing Agent, CLI tools, and integrations with enterprise AI stacks, targeting large organizations seeking outcome‑based pricing and reliable test generation.

Diffblue is listed with 2 APIs on the APIs.io network. Tagged areas include Artificial Intelligence, Testing, Automation, Enterprise, and Java.

The Diffblue catalog on APIs.io includes 1 Spectral governance ruleset.

Diffblue’s developer surface includes changelog, documentation, API reference, getting-started guide, support, engineering blog, pricing, and 21 more developer resources.

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34.9/100 thin ▲ 9.6 Agent 15/100 agent aware Heartbeat 100/100 alive Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessPaid

2 APIs

Artificial Intelligence Testing Automation Enterprise Java

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 34.9/100 · thin

Contract Quality 2.1 / 21

Developer Ergonomics 7.7 / 17

Access Clarity 9.0 / 17

Operational Transparency 3.7 / 11

Contract Governance 2.2 / 10

Discoverability 5.3 / 9

Regulatory Posture 1.8 / 15

Agent readiness — 15/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship Ask about this →
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author Ask about this →
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey) Ask about this →
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented) Ask about this →
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes Ask about this →
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →

12 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 9.9 — up to +22.5 composite points Ask about this →
Developer Ergonomics scores 45.2 — up to +11.0 composite points Ask about this →
Contract Governance scores 22.0 — up to +9.4 composite points Ask about this →

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

Not sure how this applies to your stack? Ask about any one item. Kin Lane reads every question, looks at your profile and your situation, and replies with what a fix would take — scoped to that one area, priced up front, yours whether you ship it or not. Ask a question →

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/diffblue/apis.yml: open an issue on github.com/api-evangelist/diffblue to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 2

Individual APIs this provider publishes, each with its own machine-readable definition.

Diffblue API

API for Diffblue's platform, documented at the developer portal.

Diffblue API

Diffblue API as documented publicly: 5 operations. Contract generated from the documentation by API Evangelist (2026-10-23); not the provider's own document.

Diffblue API pricing

Prices published by Diffblue, read 2026-10-23 from www.diffblue.com/pricing/.

Plan	Price
Diffblue Testing Agent	$1500

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

Diffblue Plans Pricing

1 plans

PLANS

Terms of Service 1

What its API terms permit and prohibit, quoted from its own page.

Diffblue

7 quoted statements, read from Diffblue's own page on 2026-11-09.

TERMS

Privacy & Data 1

Its role, the data it processes, retention and transfers, quoted from its own privacy page.

Diffblue

25 quoted statements, read from Diffblue's own page on 2026-11-09.

PRIVACY

Data License 1

How its data and outputs may be reused, quoted from its own terms.

Diffblue

2 quoted statements, read from Diffblue's own page on 2026-11-09.

LICENSE

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs. Counts are the severity each rule declares, not results of running them.

Diffblue API Rules

30 rules · 28 error-severity 1 warn-severity 1 info-severity

SPECTRAL

Security Posture 1

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Diffblue Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

WellKnown

WellKnown

Design & Contract 3

Pagination, idempotency, versioning, errors, and events

Spectral

Spectral

Vocabulary

Vocabulary

Conformance

Conformance

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 4

Status, limits, changes, and where to get help

ChangeLog

StatusPage

ChangeLog

Support

Commercial 6

Pricing, plans, and the legal terms of use

Plans

Pricing

PrivacyPolicy

TermsOfService

UsageTerms

DataLicense

Company 3

The organization behind the API

Newsroom

Newsroom

Website

Website

Blog

Blog

Other 4

Properties that don't map to a standard resource type

AgentCard

Hosts

Vendors

DataProcessing

Source (apis.yml)

aid: diffblue
name: Diffblue
description: Diffblue provides AI-driven testing agents that automatically generate unit tests for enterprise Java codebases.
  Their platform orchestrates AI coding tools to deliver high‑coverage, verified tests at scale, reducing developer toil and
  improving software quality. Diffblue’s solutions include the Testing Agent, CLI tools, and integrations with enterprise
  AI stacks, targeting large organizations seeking outcome‑based pricing and reliable test generation.
url: https://raw.githubusercontent.com/api-evangelist/diffblue/refs/heads/main/apis.yml
x-type: company
x-source: harvest:secondary-market
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-23 (modular-v1; was harvest)
accessModel:
  pricing: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: low
  probe_state: unreadable
  source:
  - plans
  - security
  generated: '2026-11-13'
  method: derived
specificationVersion: '0.20'
created: '2026-10-23'
modified: '2026-10-23'
tags:
- Artificial Intelligence
- Testing
- Automation
- Enterprise
- Java
tags_raw:
- AI
- Testing
- Automation
- Enterprise
- Java
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Plans
  url: plans/diffblue-plans-pricing.yml
- type: Spectral
  url: rules/diffblue-rules.yml
- type: Vocabulary
  url: vocabulary/diffblue-vocabulary.yml
- type: ChangeLog
  url: changelog/diffblue-changelog.yml
- type: Conformance
  url: conformance/diffblue-conformance.yml
- type: LLMsTxt
  url: llms/diffblue-llms.txt
- type: AgentCard
  url: a2a/diffblue-a2a.yml
- type: WellKnown
  url: well-known/diffblue-well-known.yml
- type: Hosts
  url: hosts/diffblue-hosts.yml
- type: Vendors
  url: vendors/diffblue-vendors.yml
- type: StatusPage
  url: https://status.diffblue.com/
- type: Newsroom
  url: https://www.diffblue.com/resources/category/news/
- type: DeveloperPortal
  url: https://www.diffblue.com/developers/
- type: ChangeLog
  url: https://docs.diffblue.com/changelog
- type: DomainSecurity
  url: security/diffblue-domain-security.yml
- type: Website
  url: https://www.diffblue.com
- type: Documentation
  url: https://docs.diffblue.com
- type: APIReference
  url: https://docs.diffblue.com
- type: GettingStarted
  url: https://docs.diffblue.com/quickstart
- type: Support
  url: https://docs.diffblue.com/support
- type: Blog
  url: https://www.diffblue.com/resources/category/blog/
- type: Pricing
  url: https://www.diffblue.com/pricing/
- type: PrivacyPolicy
  url: https://www.diffblue.com/privacy/
- type: TermsOfService
  url: https://www.diffblue.com/legal/
- type: GitHubOrganization
  url: https://github.com/diffblue
- type: UsageTerms
  url: terms/diffblue-terms-of-service.yml
- type: DataProcessing
  url: privacy/diffblue-privacy-policy.yml
- type: DataLicense
  url: data-license/diffblue-data-license.yml
apis:
- name: Diffblue API
  description: API for Diffblue's platform, documented at the developer portal.
  humanURL: https://docs.diffblue.com
  baseURL: null
  aid: diffblue:diffblue-api-2
- aid: diffblue:diffblue-api
  name: Diffblue API
  description: 'Diffblue API as documented publicly: 5 operations. Contract generated from the documentation by API Evangelist
    (2026-10-23); not

    the provider''s own document.'
  humanURL: https://docs.diffblue.com/installation
  baseURL: https://release.diffblue.com
  properties:
  - type: OpenAPI
    url: openapi/_ae-authored/diffblue-openapi-generated.yml
    x-provenance: generated
x-coverage:
  state: unreadable
  reason: js-rendered-docs
  detail: Docs are served via Mintlify with JavaScript rendering, no machine‑readable OpenAPI spec found.
  evidence:
  - url: https://docs.diffblue.com
    status: 200
  checked: '2026-10-23'
x-enrichment:
  date: '2026-10-23'
  status: enriched
  artifacts_added: 23
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Diffblue API — frequently asked questions

Does Diffblue have an API?

Yes. APIs.io lists 2 APIs from Diffblue, including Diffblue API and Diffblue API.

Is there an OpenAPI specification for the Diffblue API?

Yes. APIs.io indexes 1 OpenAPI specification for Diffblue, each linked for download from this page.

How much does the Diffblue API cost?

Diffblue publishes its prices; its Diffblue Testing Agent plan is $1500 as of 2026-10-23. APIs.io lists 1 pricing plan for Diffblue, with each plan's price, limits and inclusions under Pricing on this page.

Is the Diffblue API ready for AI agents?

Diffblue has a Kin Score of 34.9 out of 100 (thin) and an Agent Readiness score of 14.8 (agent-aware), scored by API Evangelist on 2026-11-13.

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