DiffiCat

DiffiCat is a browser-based website migration testing and visual regression tool. It compares a source site (Site A) against a target site (Site B) page by page across three checks: page existence (HTTP status, broken pages and redirects), content accuracy (text and SEO changes) and pixel-level visual regression at widths from 320 to 2560px, with ZIP exports of text/CSV reports and screenshots. A free trial runs in the browser at app.difficat.com with no install or card. DiffiCat also offers an Agent API for AI agents over REST or MCP, with a free allowance needing no key and paid use via prepaid keys, Pro accounts or USDC on Base (x402).

DiffiCat publishes 7 API contracts indexed on the APIs.io network, including Balance API, Compares API, Discover API, and 4 more. Tagged areas include Company, Website Migration, Visual Regression, Testing, and QA.

The DiffiCat catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

DiffiCat’s developer surface includes CLI, sandbox, authentication, documentation, and 37 more developer resources.

60.6/100 strong Agent 53/100 agent native Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →
AccessFreemiumSelf serveFree trial⚡ Free to try
1 published contract 1 MCP Servers 5 Agent Skills
CompanyWebsite MigrationVisual RegressionTestingQASEOMCPAI Agentsx402

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0
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/.
Show this score on your site. Kin Score badge preview for DiffiCat It updates itself when the score changes. Paste this where you link to your API docs:
<a href="https://apis.io/providers/difficat-com/"><img src="https://apis.io/badge/difficat-com/card.svg" alt="DiffiCat on APIs.io — Kin Score by API Evangelist"></a>
Other styles, a README pill and a shields.io endpoint are on the badge page.
Raise your score.
Agent readiness — checks not met, largest first (exact, from this profile):
  • Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
  • Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)
  • Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks
  • Documented Reversibility +6 pts — a reversal operation in the contract, graded up when a window is documented too
  • Protected Resource Metadata +5 pts — a served /.well-known/oauth-protected-resource carrying `resource` (documented), and naming its authorization_servers (verified)
  • Agentic Commerce Well-Known Document +5 pts — a parsing /.well-known/ucp.json or acp.json declaring a version and at least one service, OR (0.27) a live x402 payment challenge from _data/x402-adoption.json — `self` when its endpoints are on the provider's own domain, `platform` when they are on a vendor's
2 more unmet checks in the Agent Readiness table above.
Kin Score — facets with the most composite points still available (weight × headroom):
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.
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/difficat-com/apis.yml: open an issue on github.com/api-evangelist/difficat-com 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 →

Standards implemented 3

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

measured — observed by APIs.io (conformant)
measured — observed by APIs.io (documented)
measured — observed by APIs.io (published)

APIs 7

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

DiffiCat Balance API

The Balance API from DiffiCat — 1 operation(s) for balance.

DiffiCat Compares API

The Compares API from DiffiCat — 1 operation(s) for compares.

DiffiCat Discover API

The Discover API from DiffiCat — 1 operation(s) for discover.

DiffiCat Feedback API

The Feedback API from DiffiCat — 1 operation(s) for feedback.

DiffiCat Jobs API

The Jobs API from DiffiCat — 6 operation(s) for jobs.

DiffiCat Screenshots API

The Screenshots API from DiffiCat — 1 operation(s) for screenshots.

DiffiCat Snapshots API

The Snapshots API from DiffiCat — 5 operation(s) for snapshots.

Scroll for all 7

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

Agent Skills 5

Packaged agent skills for driving this provider's APIs from an AI assistant.

difficat

AGENT SKILL

DiffiCat API pricing

Prices published by DiffiCat.

PlanPrice
Free trial free trial
Pay as you go pay as you go at $0.01 per captured page from a prepaid balance
Agent API per call $0.02 per compared pair by a comparison job for the first 1,000 pairs of the job and $0.01
Pro Pro is $29 a month or $290 a year
Enterprise larger needs are quoted on request

Plan details, limits and sources →

Rate limits

All 5 limits →

Pricing Plans 1

Published pricing tiers and plan structures.

Rate Limits 1

Documented rate limits and quota policies.

Difficat Com Rate Limits

5 limits

RATE LIMITS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Difficat Com Context

31 classes · 123 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

DiffiCat API Rules

49 rules · 41 errors 6 warnings 2 info

SPECTRAL

OpenAPI Overlays 1

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Difficat Com Agent Api Overlay

18 actions · documentation · difficat-com-openapi.yml

DERIVED

JSON Schema 6

Standalone JSON Schema definitions for this provider's data models.

BalanceResponse

6 properties

JSON SCHEMA

SnapshotCompareRequest

6 properties

JSON SCHEMA

SnapshotDetail

4 properties

JSON SCHEMA

SnapshotPage

5 properties

JSON SCHEMA

StartJobRequest

18 properties

JSON SCHEMA

StoredCompareRequest

7 properties

JSON SCHEMA

Security Posture 3

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

Difficat Com Authentication

apiKey/http · 6 schemes

SECURITY

Difficat Com Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Difficat Com Vulnerability Disclosure

security.txt · contact published

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Difficat Com Agentic Access

17 operations · 8 acting

17 operations · 8 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

Documentation 1

Reference material describing how the API behaves

Agent Surfaces 6

MCP servers, agent skills, and machine-readable catalogs

Design & Contract 9

Pagination, idempotency, versioning, errors, and events

Scroll for all 9

Build 7

SDKs, sample code, and the tooling you integrate with

Scroll for all 7

Access & Security 6

Authentication, authorization, and security posture

Operate 3

Status, limits, changes, and where to get help

Commercial 3

Pricing, plans, and the legal terms of use

Company 1

The organization behind the API

Other 3

Properties that don't map to a standard resource type

Source (apis.yml)

apis.yml Raw ↑
aid: difficat-com
name: DiffiCat
description: 'DiffiCat is a browser-based website migration testing and visual regression tool. It compares a source site
  (Site A) against a target site (Site B) page by page across three checks: page existence (HTTP status, broken pages and
  redirects), content accuracy (text and SEO changes) and pixel-level visual regression at widths from 320 to 2560px, with
  ZIP exports of text/CSV reports and screenshots. A free trial runs in the browser at app.difficat.com with no install or
  card. DiffiCat also offers an Agent API for AI agents over REST or MCP, with a free allowance needing no key and paid use
  via prepaid keys, Pro accounts or USDC on Base (x402).'
url: https://artifacts.apis.io/difficat-com/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-05 (modular-v1; was harvest)
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: true
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium (free trial) · Self-serve signup
  confidence: high
  probe_state: covered
  source:
  - plans
  - authentication
  - rate-limits
  - security
  - sandbox
  generated: '2026-11-06'
  method: derived
specificationVersion: '0.20'
created: '2026-11-05'
modified: '2026-11-05'
tags:
- Company
- Website Migration
- Visual Regression
- Testing
- QA
- SEO
- MCP
- AI Agents
- x402
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
image: https://difficat.com/assets/og-image.png
common:
- type: MCPServer
  url: https://app.difficat.com/mcp
- type: AgenticAccess
  url: agentic-access/difficat-com-agentic-access.yml
- type: RateLimits
  url: rate-limits/difficat-com-rate-limits.yml
- type: Plans
  url: plans/difficat-com-plans-pricing.yml
- type: Spectral
  url: rules/difficat-com-rules.yml
- type: JSONLD
  url: json-ld/difficat-com-context.jsonld
- type: Vocabulary
  url: vocabulary/difficat-com-vocabulary.yml
- type: AgentSkill
  url: skills/_index.yml
- type: DataModel
  url: data-model/difficat-com-data-model.yml
- type: CLI
  url: cli/difficat-com-cli.yml
- type: Idempotency
  url: conventions/difficat-com-conventions.yml
- type: Conventions
  url: conventions/difficat-com-conventions.yml
- type: Sandbox
  url: sandbox/difficat-com-sandbox.yml
- type: Security
  url: security/difficat-com-vulnerability-disclosure.yml
- type: Deprecation
  url: lifecycle/difficat-com-lifecycle.yml
- type: Lifecycle
  url: lifecycle/difficat-com-lifecycle.yml
- type: ErrorCatalog
  url: errors/difficat-com-problem-types.yml
- type: Conformance
  url: conformance/difficat-com-conformance.yml
- type: Overlay
  url: overlays/difficat-com-agent-api-overlay.yaml
- type: LLMsTxt
  url: llms/difficat-com-llms.txt
- type: AgentCard
  url: a2a/difficat-com-a2a.yml
- type: ToolCrosswalk
  url: mcp/difficat-com-tool-crosswalk.yml
- type: SecurityTxt
  url: well-known/difficat-com-security.txt
- type: SecurityTxt
  url: well-known/difficat-com-app-security.txt
- type: WellKnown
  url: well-known/difficat-com-well-known.yml
- type: Hosts
  url: hosts/difficat-com-hosts.yml
- type: IntegrationEdges
  url: integrations/difficat-com-integration-edges.yml
- type: SDKs
  url: packages/difficat-com-packages.yml
- type: Packages
  url: packages/difficat-com-packages.yml
- type: Authentication
  url: authentication/difficat-com-authentication.yml
- type: VulnerabilityDisclosure
  url: security/difficat-com-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/difficat-com-domain-security.yml
- type: Website
  url: https://difficat.com/
- type: Documentation
  url: https://difficat.com/agents
- type: LLMsTxt
  url: https://difficat.com/llms.txt
- type: GitHubOrganization
  url: https://github.com/difficat
- type: SourceCode
  url: https://github.com/difficat/difficat
- type: Login
  url: https://app.difficat.com/
- type: StatusPage
  url: https://status.difficat.com
- type: TermsOfService
  url: https://difficat.com/terms
- type: PrivacyPolicy
  url: https://difficat.com/privacy
apis:
- aid: difficat-com:difficat-com-balance-api
  name: DiffiCat Balance API
  description: The Balance API from DiffiCat — 1 operation(s) for balance.
  humanURL: https://difficat.com/agents
  baseURL: https://app.difficat.com/api/v1
  tags:
  - Balances
  tags_raw:
  - Balance
  properties:
  - type: OpenAPI
    url: openapi/difficat-com-balance-api-openapi.yml
  - type: Documentation
    url: https://difficat.com/agents
  - type: JSONSchema
    url: json-schema/difficat-com-start-job-request-schema.json
  - type: JSONSchema
    url: json-schema/difficat-com-snapshot-detail-schema.json
  - type: JSONSchema
    url: json-schema/difficat-com-snapshot-compare-request-schema.json
  - type: JSONSchema
    url: json-schema/difficat-com-stored-compare-request-schema.json
  - type: JSONSchema
    url: json-schema/difficat-com-balance-response-schema.json
  - type: JSONSchema
    url: json-schema/difficat-com-snapshot-page-schema.json
- aid: difficat-com:difficat-com-compares-api
  name: DiffiCat Compares API
  description: The Compares API from DiffiCat — 1 operation(s) for compares.
  humanURL: https://difficat.com/agents
  baseURL: https://app.difficat.com/api/v1
  tags:
  - Compares
  properties:
  - type: OpenAPI
    url: openapi/difficat-com-compares-api-openapi.yml
  - type: Documentation
    url: https://difficat.com/agents
  - type: JSONSchema
    url: json-schema/difficat-com-start-job-request-schema.json
  - type: JSONSchema
    url: json-schema/difficat-com-snapshot-detail-schema.json
  - type: JSONSchema
    url: json-schema/difficat-com-snapshot-compare-request-schema.json
  - type: JSONSchema
    url: json-schema/difficat-com-stored-compare-request-schema.json
  - type: JSONSchema
    url: json-schema/difficat-com-balance-response-schema.json
  - type: JSONSchema
    url: json-schema/difficat-com-snapshot-page-schema.json
- aid: difficat-com:difficat-com-discover-api
  name: DiffiCat Discover API
  description: The Discover API from DiffiCat — 1 operation(s) for discover.
  humanURL: https://difficat.com/agents
  baseURL: https://app.difficat.com/api/v1
  tags:
  - Discover
  properties:
  - type: OpenAPI
    url: openapi/difficat-com-discover-api-openapi.yml
  - type: Documentation
    url: https://difficat.com/agents
  - type: JSONSchema
    url: json-schema/difficat-com-start-job-request-schema.json
  - type: JSONSchema
    url: json-schema/difficat-com-snapshot-detail-schema.json
  - type: JSONSchema
    url: json-schema/difficat-com-snapshot-compare-request-schema.json
  - type: JSONSchema
    url: json-schema/difficat-com-stored-compare-request-schema.json
  - type: JSONSchema
    url: json-schema/difficat-com-balance-response-schema.json
  - type: JSONSchema
    url: json-schema/difficat-com-snapshot-page-schema.json
- aid: difficat-com:difficat-com-feedback-api
  name: DiffiCat Feedback API
  description: The Feedback API from DiffiCat — 1 operation(s) for feedback.
  humanURL: https://difficat.com/agents
  baseURL: https://app.difficat.com/api/v1
  tags:
  - Feedback
  properties:
  - type: OpenAPI
    url: openapi/difficat-com-feedback-api-openapi.yml
  - type: Documentation
    url: https://difficat.com/agents
  - type: JSONSchema
    url: json-schema/difficat-com-start-job-request-schema.json
  - type: JSONSchema
    url: json-schema/difficat-com-snapshot-detail-schema.json
  - type: JSONSchema
    url: json-schema/difficat-com-snapshot-compare-request-schema.json
  - type: JSONSchema
    url: json-schema/difficat-com-stored-compare-request-schema.json
  - type: JSONSchema
    url: json-schema/difficat-com-balance-response-schema.json
  - type: JSONSchema
    url: json-schema/difficat-com-snapshot-page-schema.json
- aid: difficat-com:difficat-com-jobs-api
  name: DiffiCat Jobs API
  description: The Jobs API from DiffiCat — 6 operation(s) for jobs.
  humanURL: https://difficat.com/agents
  baseURL: https://app.difficat.com/api/v1
  tags:
  - Job
  tags_raw:
  - Jobs
  properties:
  - type: OpenAPI
    url: openapi/difficat-com-jobs-api-openapi.yml
  - type: Documentation
    url: https://difficat.com/agents
  - type: JSONSchema
    url: json-schema/difficat-com-start-job-request-schema.json
  - type: JSONSchema
    url: json-schema/difficat-com-snapshot-detail-schema.json
  - type: JSONSchema
    url: json-schema/difficat-com-snapshot-compare-request-schema.json
  - type: JSONSchema
    url: json-schema/difficat-com-stored-compare-request-schema.json
  - type: JSONSchema
    url: json-schema/difficat-com-balance-response-schema.json
  - type: JSONSchema
    url: json-schema/difficat-com-snapshot-page-schema.json
- aid: difficat-com:difficat-com-screenshots-api
  name: DiffiCat Screenshots API
  description: The Screenshots API from DiffiCat — 1 operation(s) for screenshots.
  humanURL: https://difficat.com/agents
  baseURL: https://app.difficat.com/api/v1
  tags:
  - Screenshots
  properties:
  - type: OpenAPI
    url: openapi/difficat-com-screenshots-api-openapi.yml
  - type: Documentation
    url: https://difficat.com/agents
  - type: JSONSchema
    url: json-schema/difficat-com-start-job-request-schema.json
  - type: JSONSchema
    url: json-schema/difficat-com-snapshot-detail-schema.json
  - type: JSONSchema
    url: json-schema/difficat-com-snapshot-compare-request-schema.json
  - type: JSONSchema
    url: json-schema/difficat-com-stored-compare-request-schema.json
  - type: JSONSchema
    url: json-schema/difficat-com-balance-response-schema.json
  - type: JSONSchema
    url: json-schema/difficat-com-snapshot-page-schema.json
- aid: difficat-com:difficat-com-snapshots-api
  name: DiffiCat Snapshots API
  description: The Snapshots API from DiffiCat — 5 operation(s) for snapshots.
  humanURL: https://difficat.com/agents
  baseURL: https://app.difficat.com/api/v1
  tags:
  - Snapshots
  properties:
  - type: OpenAPI
    url: openapi/difficat-com-snapshots-api-openapi.yml
  - type: Documentation
    url: https://difficat.com/agents
  - type: JSONSchema
    url: json-schema/difficat-com-start-job-request-schema.json
  - type: JSONSchema
    url: json-schema/difficat-com-snapshot-detail-schema.json
  - type: JSONSchema
    url: json-schema/difficat-com-snapshot-compare-request-schema.json
  - type: JSONSchema
    url: json-schema/difficat-com-stored-compare-request-schema.json
  - type: JSONSchema
    url: json-schema/difficat-com-balance-response-schema.json
  - type: JSONSchema
    url: json-schema/difficat-com-snapshot-page-schema.json
x-coverage:
  state: covered
  reason: identity-verified
  detail: 'Website https://difficat.com/ names the company (title "DiffiCat: Website Migration Testing & Visual Regression",
    footer "© 2026 DiffiCat"); pointers taken from homepage/agents page links, each fetched.'
  evidence:
  - url: https://difficat.com/
    status: 200
  - url: https://difficat.com/agents
    status: 200
  - url: https://difficat.com/llms.txt
    status: 200
  - url: https://github.com/difficat
    status: 200
  - url: https://github.com/difficat/difficat
    status: 200
  - url: https://app.difficat.com/
    status: 200
  - url: https://status.difficat.com
    status: 200
  - url: https://difficat.com/terms
    status: 200
  - url: https://difficat.com/privacy
    status: 200
  - url: https://difficat.com/assets/og-image.png
    status: 200
  - url: https://app.difficat.com/api/v1/openapi.json
    status: 200
x-enrichment:
  date: '2026-11-05'
  status: enriched
  artifacts_added: 48
  pass: modular-v1
  engine: identity=anthropic,contract=anthropic,surfaces=anthropic,docs=anthropic,regulatory=anthropic

DiffiCat API — frequently asked questions

Does DiffiCat have an API?

Yes. APIs.io lists 7 APIs from DiffiCat, including DiffiCat Balance API, DiffiCat Compares API and DiffiCat Discover API, and 4 more.

Is there an OpenAPI specification for the DiffiCat API?

Yes. APIs.io indexes 7 OpenAPI specifications for DiffiCat, each linked for download from this page.

How do I authenticate with the DiffiCat API?

DiffiCat uses bearer-token authentication (apiKey/http · 6 schemes). The details are profiled on APIs.io as Difficat Com Authentication.

How much does the DiffiCat API cost?

DiffiCat publishes its prices; its Free trial plan is free trial as of 2026-11-05. APIs.io lists 5 pricing plans for DiffiCat, with each plan's price, limits and inclusions under Pricing on this page.

Does DiffiCat have an MCP server?

Yes. APIs.io lists 1 MCP server for DiffiCat.

Is the DiffiCat API ready for AI agents?

DiffiCat has a Kin Score of 60.6 out of 100 (strong) and an Agent Readiness score of 52.8 (agent-native), scored by API Evangelist on 2026-11-06.

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