FactReason

FactReason provides coding agents with verifiable npm and PyPI upgrade advisories, API schemas, and component facts over its MCP platform. The service offers metered access to upgrade data, complete with source evidence, enabling AI agents to safely incorporate dependency updates. FactReason aims to improve software supply chain security and reliability for developers and automated tools.

FactReason publishes 12 API contracts indexed on the APIs.io network, including APIs API, Balance API, Components API, and 9 more. Tagged areas include Reference Data, AI Agents, Dependency Management, API Catalog, and Upgrade Advisories.

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

FactReason’s developer surface includes changelog, API reference, authentication, documentation, pricing, and 17 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

44.3/100 developing Agent 23/100 agent aware Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessFreemiumSelf serveFree trial⚡ Free to try

1 published contract 1 MCP Servers

Reference Data AI Agents Dependency Management API CatalogUpgrade AdvisoriesMetered API

Kin Score

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

Composite quality — 44.3/100 · developing

Contract Quality 9.9 / 21

Developer Ergonomics 4.9 / 17

Access Clarity 8.7 / 17

Operational Transparency 2.6 / 11

Contract Governance 3.2 / 10

Discoverability 6.4 / 9

Regulatory Posture 4.6 / 15

Agent readiness — 23/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 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):

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 →
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented) Ask about this →
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link Ask about this →
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document Ask about this →
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) Ask about this →

8 more unmet checks in the Agent Readiness table above.

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

Developer Ergonomics scores 28.6 — up to +14.3 composite points Ask about this →
Contract Quality scores 46.5 — up to +13.4 composite points Ask about this →
Operational Transparency scores 23.8 — up to +9.9 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/factreason-com/apis.yml: open an issue on github.com/api-evangelist/factreason-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 2

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.

Model Context Protocol (MCP)

measured — observed by APIs.io (documented)

OpenAPI

measured — observed by APIs.io (published)

APIs 12

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

FactReason APIs API

The Apis API from FactReason — 7 operation(s) for apis.

FactReason Balance API

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

FactReason Components API

The Components API from FactReason — 2 operation(s) for components.

FactReason Discover API

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

FactReason Health API

The Health API from FactReason — 1 operation(s) for health.

FactReason Keys API

The Keys API from FactReason — 1 operation(s) for keys.

FactReason MCP API

The Mcp API from FactReason — 1 operation(s) for mcp.

FactReason Packages API

The Packages API from FactReason — 2 operation(s) for packages.

FactReason Pricing API

The Pricing API from FactReason — 1 operation(s) for pricing.

FactReason Report Error API

The Report Error API from FactReason — 1 operation(s) for report error.

FactReason Search API

The Search API from FactReason — 1 operation(s) for search.

FactReason Stats API

The Stats API from FactReason — 1 operation(s) for stats.

Scroll for all 12

MCP Servers 1

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

FactReason MCP Server

Remote MCP server at factreason.com.

MCP SERVER

FactReason API pricing

Prices published by FactReason, read 2026-11-07 from factreason.com/pricing.

Plan	Price
Starter	$10
Standard	$50
Scale	$200
Free Trial Credit	Up to $0.05 of one-off trial credit Includes: Up to 50 component lookups or 2 dependency upgrade advisories
Component specification lookup	$0.001
API schema lookup	$0.002
Natural-language catalogue search	$0.003
Deprecation and sunset radar	$0.005

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

FactReason Plans Pricing

8 plans

PLANS

Spectral Rules 1

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

FactReason API Rules

37 rules · 34 error-severity 2 warn-severity 1 info-severity

SPECTRAL

Security Posture 3

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

FactReason Authentication

http · 1 scheme

SECURITY

FactReason Domain Security

TLSv1.3 · DMARC

SECURITY

FactReason Vulnerability Disclosure

security.txt · contact published

SECURITY

Agentic Access (API Evangelist recommendations) 1

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

FactReason Agentic Access

20 operations · 4 acting

AGENTIC

Resources

Documentation 2

Reference material describing how the API behaves

APIReference

APIReference

Documentation

Documentation

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

LLMsTxt

MCPServer

WellKnown

Design & Contract 3

Pagination, idempotency, versioning, errors, and events

Spectral

Spectral

ErrorCatalog

ErrorCatalog

Conformance

Conformance

Access & Security 5

Authentication, authorization, and security posture

Security

Security

SecurityTxt

SecurityTxt

Authentication

Authentication

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

ChangeLog

ChangeLog

ChangeLog

ChangeLog

Commercial 4

Pricing, plans, and the legal terms of use

Plans

Pricing

TermsOfService

PrivacyPolicy

Company 1

The organization behind the API

Website

Website

Other 1

Properties that don't map to a standard resource type

Hosts

Hosts

Source (apis.yml)

aid: factreason-com
name: FactReason
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: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-13'
  method: derived
image: https://factreason.com/og-image.jpg
description: FactReason provides coding agents with verifiable npm and PyPI upgrade advisories, API schemas, and component
  facts over its MCP platform. The service offers metered access to upgrade data, complete with source evidence, enabling
  AI agents to safely incorporate dependency updates. FactReason aims to improve software supply chain security and reliability
  for developers and automated tools.
url: https://artifacts.apis.io/factreason-com/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-07 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-11-07'
modified: '2026-11-07'
tags:
- Reference Data
- AI Agents
- Dependency Management
- API Catalog
- Upgrade Advisories
- Metered API
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/factreason-com-agentic-access.yml
- type: Plans
  url: plans/factreason-com-plans-pricing.yml
- type: Spectral
  url: rules/factreason-com-rules.yml
- type: ChangeLog
  url: changelog/factreason-com-changelog.yml
- type: Security
  url: https://factreason.com/terms
- type: ErrorCatalog
  url: errors/factreason-com-problem-types.yml
- type: Conformance
  url: conformance/factreason-com-conformance.yml
- type: LLMsTxt
  url: llms/factreason-com-llms.txt
- type: MCPServer
  url: mcp/factreason-com-mcp.yml
- type: SecurityTxt
  url: well-known/factreason-com-security.txt
- type: WellKnown
  url: well-known/factreason-com-well-known.yml
- type: Hosts
  url: hosts/factreason-com-hosts.yml
- type: ChangeLog
  url: https://factreason.com/changelog
- type: APIReference
  url: https://factreason.com/llms.txt
- type: Authentication
  url: authentication/factreason-com-authentication.yml
- type: VulnerabilityDisclosure
  url: security/factreason-com-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/factreason-com-domain-security.yml
- type: Website
  url: https://factreason.com/
- type: Documentation
  url: https://factreason.com/docs
- type: Pricing
  url: https://factreason.com/pricing
- type: TermsOfService
  url: https://factreason.com/terms
- type: PrivacyPolicy
  url: https://factreason.com/privacy
apis:
- aid: factreason-com:factreason-com-apis-api
  name: FactReason APIs API
  description: The Apis API from FactReason — 7 operation(s) for apis.
  humanURL: https://factreason.com/docs
  baseURL: https://factreason.com
  tags: []
  tags_raw:
  - Apis
  properties:
  - type: OpenAPI
    url: openapi/factreason-com-apis-api-openapi.yml
- aid: factreason-com:factreason-com-balance-api
  name: FactReason Balance API
  description: The Balance API from FactReason — 1 operation(s) for balance.
  humanURL: https://factreason.com/docs
  baseURL: https://factreason.com
  tags:
  - Balances
  tags_raw:
  - Balance
  properties:
  - type: OpenAPI
    url: openapi/factreason-com-balance-api-openapi.yml
- aid: factreason-com:factreason-com-components-api
  name: FactReason Components API
  description: The Components API from FactReason — 2 operation(s) for components.
  humanURL: https://factreason.com/docs
  baseURL: https://factreason.com
  tags:
  - Components
  properties:
  - type: OpenAPI
    url: openapi/factreason-com-components-api-openapi.yml
- aid: factreason-com:factreason-com-discover-api
  name: FactReason Discover API
  description: The Discover API from FactReason — 1 operation(s) for discover.
  humanURL: https://factreason.com/docs
  baseURL: https://factreason.com
  tags:
  - Discover
  properties:
  - type: OpenAPI
    url: openapi/factreason-com-discover-api-openapi.yml
- aid: factreason-com:factreason-com-health-api
  name: FactReason Health API
  description: The Health API from FactReason — 1 operation(s) for health.
  humanURL: https://factreason.com/docs
  baseURL: https://factreason.com
  tags:
  - Health
  properties:
  - type: OpenAPI
    url: openapi/factreason-com-health-api-openapi.yml
- aid: factreason-com:factreason-com-keys-api
  name: FactReason Keys API
  description: The Keys API from FactReason — 1 operation(s) for keys.
  humanURL: https://factreason.com/docs
  baseURL: https://factreason.com
  tags:
  - Keys
  properties:
  - type: OpenAPI
    url: openapi/factreason-com-keys-api-openapi.yml
- aid: factreason-com:factreason-com-mcp-api
  name: FactReason MCP API
  description: The Mcp API from FactReason — 1 operation(s) for mcp.
  humanURL: https://factreason.com/docs
  baseURL: https://factreason.com
  tags:
  - MCP
  tags_raw:
  - Mcp
  properties:
  - type: OpenAPI
    url: openapi/factreason-com-mcp-api-openapi.yml
- aid: factreason-com:factreason-com-packages-api
  name: FactReason Packages API
  description: The Packages API from FactReason — 2 operation(s) for packages.
  humanURL: https://factreason.com/docs
  baseURL: https://factreason.com
  tags:
  - Packages
  properties:
  - type: OpenAPI
    url: openapi/factreason-com-packages-api-openapi.yml
- aid: factreason-com:factreason-com-pricing-api
  name: FactReason Pricing API
  description: The Pricing API from FactReason — 1 operation(s) for pricing.
  humanURL: https://factreason.com/docs
  baseURL: https://factreason.com
  tags:
  - Pricing
  properties:
  - type: OpenAPI
    url: openapi/factreason-com-pricing-api-openapi.yml
- aid: factreason-com:factreason-com-report-error-api
  name: FactReason Report Error API
  description: The Report Error API from FactReason — 1 operation(s) for report error.
  humanURL: https://factreason.com/docs
  baseURL: https://factreason.com
  tags:
  - Report Error
  properties:
  - type: OpenAPI
    url: openapi/factreason-com-report-error-api-openapi.yml
- aid: factreason-com:factreason-com-search-api
  name: FactReason Search API
  description: The Search API from FactReason — 1 operation(s) for search.
  humanURL: https://factreason.com/docs
  baseURL: https://factreason.com
  tags:
  - Search
  properties:
  - type: OpenAPI
    url: openapi/factreason-com-search-api-openapi.yml
- aid: factreason-com:factreason-com-stats-api
  name: FactReason Stats API
  description: The Stats API from FactReason — 1 operation(s) for stats.
  humanURL: https://factreason.com/docs
  baseURL: https://factreason.com
  tags:
  - Stats
  properties:
  - type: OpenAPI
    url: openapi/factreason-com-stats-api-openapi.yml
x-enrichment:
  date: '2026-11-07'
  status: enriched
  artifacts_added: 21
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

FactReason API — frequently asked questions

Does FactReason have an API?

Yes. APIs.io lists 12 APIs from FactReason, including FactReason APIs API, FactReason Balance API and FactReason Components API, and 9 more.

Is there an OpenAPI specification for the FactReason API?

Yes. APIs.io indexes 12 OpenAPI specifications for FactReason, each linked for download from this page.

How do I authenticate with the FactReason API?

FactReason uses bearer-token authentication (http · 1 scheme). The details are profiled on APIs.io as FactReason Authentication.

How much does the FactReason API cost?

FactReason publishes its prices; its Starter plan is $10 as of 2026-11-07. APIs.io lists 8 pricing plans for FactReason, with each plan's price, limits and inclusions under Pricing on this page.

Does FactReason have an MCP server?

Yes. APIs.io lists 1 MCP server for FactReason: Remote MCP server at factreason.com.

Is the FactReason API ready for AI agents?

FactReason has a Kin Score of 44.3 out of 100 (developing) and an Agent Readiness score of 23.1 (agent-aware), scored by API Evangelist on 2026-11-13.

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