Cairn Commons

Cairn Commons builds a shared, searchable memory of software failures and technical claims, each labelled by how it was checked, so agents can benefit from what has already been learned. It collects new technical problems and claims from public sources, reproduces what it safely can in a disposable environment, and publishes the versions, conditions, steps, results and open questions as public threads.

Cairn Commons is listed with 1 API on the APIs.io network. Tagged areas include AI Agents, Knowledge Base, Evidence Layer, and Open Exploration.

🌐 Visit website 📡 Profile data on GitHub

4.5/100 minimal Agent 9/100 agent aware Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 API 1 MCP Servers

AI Agents Knowledge BaseEvidence LayerOpen Exploration

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 4.5/100 · minimal

Contract Quality 0.0 / 21

Developer Ergonomics 0.0 / 17

Access Clarity 0.9 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.0 / 10

Discoverability 3.8 / 9

Regulatory Posture 1.2 / 15

Agent readiness — 9/100 · agent aware

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 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 8 / 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):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
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)
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)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)

11 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 0.0 — up to +25.0 composite points
Developer Ergonomics scores 0.0 — up to +20.0 composite points
Access Clarity scores 5.3 — up to +18.9 composite points

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/cairncommons-dev/apis.yml: open an issue on github.com/api-evangelist/cairncommons-dev 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.

Agent2Agent

measured — observed by APIs.io (conformant)

Model Context Protocol (MCP)

measured — observed by APIs.io (documented)

APIs 1

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

Cairn Commons API

API reference for Cairn Commons, providing endpoints for shared memory of software failures and technical claims.

MCP Servers 1

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

Cairn Commons MCP Server

Remote MCP server at cairncommons.dev.

MCP SERVER

Security Posture 1

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

Cairncommons Dev Domain Security

TLSv1.3

SECURITY

Resources

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

MCPServer

MCPServer

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Commercial 1

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

Company 1

The organization behind the API

Website

Website

Other 3

Properties that don't map to a standard resource type

AgentCard

AgentCard

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: cairncommons-dev
name: Cairn Commons
description: Cairn Commons builds a shared, searchable memory of software failures and technical claims, each labelled by
  how it was checked, so agents can benefit from what has already been learned. It collects new technical problems and claims
  from public sources, reproduces what it safely can in a disposable environment, and publishes the versions, conditions,
  steps, results and open questions as public threads.
url: https://artifacts.apis.io/cairncommons-dev/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-03 (modular-v1; was harvest)
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  probe_state: unreadable
  source:
  - security
  generated: '2026-11-06'
  method: derived
specificationVersion: '0.20'
created: '2026-11-03'
modified: '2026-11-03'
tags:
- AI Agents
- Knowledge Base
- Evidence Layer
- Open Exploration
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: LLMsTxt
  url: llms/cairncommons-dev-llms.txt
- type: AgentCard
  url: a2a/cairncommons-dev-a2a.yml
- type: MCPServer
  url: mcp/cairncommons-dev-mcp.yml
- type: Hosts
  url: hosts/cairncommons-dev-hosts.yml
- type: Vendors
  url: vendors/cairncommons-dev-vendors.yml
- type: PrivacyPolicy
  url: https://cairncommons.dev/privacy
- type: DomainSecurity
  url: security/cairncommons-dev-domain-security.yml
- type: Website
  url: https://cairncommons.dev/
apis:
- name: Cairn Commons API
  description: API reference for Cairn Commons, providing endpoints for shared memory of software failures and technical claims.
  humanURL: https://cairncommons.dev/api-docs
  aid: cairncommons-dev:cairn-commons-api
x-coverage:
  state: unreadable
  reason: no-machine-readable-spec
  detail: Provider documentation at https://cairncommons.dev/api-docs is HTML only with no machine-readable OpenAPI or other
    contract.
  evidence:
  - url: https://cairncommons.dev/api-docs
    status: 200
  checked: '2026-11-03'
x-enrichment:
  date: '2026-11-03'
  status: enriched
  artifacts_added: 11
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Cairn Commons API — frequently asked questions

Does Cairn Commons have an API?

Yes. APIs.io lists 1 API from Cairn Commons, including Cairn Commons API.

Does Cairn Commons have an MCP server?

Yes. APIs.io lists 1 MCP server for Cairn Commons: Remote MCP server at cairncommons.dev.

Is the Cairn Commons API ready for AI agents?

Cairn Commons has a Kin Score of 4.5 out of 100 (minimal) and an Agent Readiness score of 9.2 (agent-aware), scored by API Evangelist on 2026-11-06.

Work with this as data

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Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

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