Circular

Circular was a Spanish hiring community that connected tech recruiters with software developers, describing itself as a "Hiring Community for Tech Recruiters & Developers." It operated a referral-driven talent network in which recruiters shared vetted candidates they could not place themselves, and developers received job opportunities through that trusted pool rather than through cold outreach. The company was backed by Point Nine Capital and ran its candidate and recruiter landing experiences on a Next.js application served from circular.io and static.circular.io. Circular has since shut down and merged into Manfred (getmanfred.com), the largest tech community in Spain, with its own migration notice stating "Circular cierra sus puertas para integrarse en Manfred." The circular.io domain remains registered to Singular People Europe S.L. but has been fully undelegated, and Point Nine no longer lists Circular in its portfolio. Circular never published a public developer program, API, SDK, or specification. This profile is retained as a historical record; there is no API surface to enrich.

Circular is profiled on the APIs.io network. Tagged areas include Company, Defunct, Acquired, Recruiting, and Hiring.

📡 Profile data on GitHub
0.0/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →
0 APIs
CompanyDefunctAcquiredRecruitingHiringTalentJobDevelopersCommunitySpain

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0
Composite quality — 0.0/100 · minimal
Contract Quality 0.0 / 21
Developer Ergonomics 0.0 / 17
Access Clarity 0.0 / 17
Operational Transparency 0.0 / 11
Contract Governance 0.0 / 10
Discoverability 0.0 / 9
Regulatory Posture 0.0 / 15
Agent readiness — 0/100 · human only
Machine-Readable Contract 0 / 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/.
Show this score on your site. Kin Score badge preview for Circular It updates itself when the score changes. Paste this where you link to your API docs: 
<a href="https://apis.io/providers/circular/"><img src="https://apis.io/badge/circular/card.svg" alt="Circular 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):
  • Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
  • MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
  • 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
13 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/circular/apis.yml: open an issue on github.com/api-evangelist/circular 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 →

Source (apis.yml)

apis.yml Raw ↑ 
aid: circular
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - none
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/circular.png
name: Circular
description: Circular was a Spanish hiring community that connected tech recruiters with software developers, describing itself
  as a "Hiring Community for Tech Recruiters & Developers." It operated a referral-driven talent network in which recruiters
  shared vetted candidates they could not place themselves, and developers received job opportunities through that trusted
  pool rather than through cold outreach. The company was backed by Point Nine Capital and ran its candidate and recruiter
  landing experiences on a Next.js application served from circular.io and static.circular.io. Circular has since shut down
  and merged into Manfred (getmanfred.com), the largest tech community in Spain, with its own migration notice stating "Circular
  cierra sus puertas para integrarse en Manfred." The circular.io domain remains registered to Singular People Europe S.L.
  but has been fully undelegated, and Point Nine no longer lists Circular in its portfolio. Circular never published a public
  developer program, API, SDK, or specification. This profile is retained as a historical record; there is no API surface
  to enrich.
url: https://raw.githubusercontent.com/api-evangelist/circular/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- point-nine
x-tier: stub
x-tier-reason: defunct-no-api-surface
x-status: defunct
x-merged-into: manfred
x-successor-url: https://www.getmanfred.com/circular-to-manfred
x-shutdown-note: 'Circular announced it was closing to integrate into Manfred ("Circular cierra sus puertas para integrarse
  en Manfred: la mayor comunidad tech de Espana"). No exact shutdown date is published on the migration page. The last archived
  circular.io homepage returning HTTP 200 is the Internet Archive capture of 2024-12-28, and that capture already carried
  a recruiterMigrationSignupFlagUrl pointing at getmanfred.com/circular-to-manfred, so the migration was already in progress
  by late December 2024.'
x-domain-status: undelegated
x-domain-note: circular.io is still registered (IONOS SE, created 2012-10-27, registry expiry 2027-10-27, last updated 2025-10-23)
  to registrant organization SINGULAR PEOPLE EUROPE S.L (ES), the Spanish entity behind Manfred. The domain publishes no NS,
  A, MX, TXT, or SOA records and does not resolve, so there is no live host to probe and no Website pointer is wired.
x-headquarters: Spain
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Company
- Defunct
- Acquired
- Recruiting
- Hiring
- Talent
- Job
- Developers
- Community
- Spain
tags_raw:
- Company
- Defunct
- Acquired
- Recruiting
- Hiring
- Talent
- Jobs
- Developers
- Community
- Spain
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common: []
x-enrichment:
  date: '2026-07-20'
  status: nochange
  artifacts_added: 0
  pass: local-v1

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