CEF Radar

CEF Radar provides plain‑words analysis of closed‑end fund activity. Users can enter a fund ticker or name to see if large investors are pushing for changes, whether the fund has announced buy‑backs, votes, or closures, and get explanations of filings. The service offers guides on tender offers, proxy votes, activist investors, return of capital, expense ratios, leverage, liquidations, mergers, and term funds, all illustrated with live SEC filing examples.

CEF Radar publishes 5 API contracts indexed on the APIs.io network, including Account API, Events API, Funds API, and 2 more. Tagged areas include Closed‑end funds, SEC Filings, Investor alerts, Fund activity, and Buybacks.

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

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23.0/100 emerging Agent 42/100 agent ready Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 published contract 1 MCP Servers

Closed‑end fundsSEC FilingsInvestor alertsFund activityBuybacks

Kin Score

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

Composite quality — 23.0/100 · emerging

Contract Quality 10.2 / 21

Developer Ergonomics 0.0 / 17

Access Clarity 1.8 / 17

Operational Transparency 0.0 / 11

Contract Governance 2.2 / 10

Discoverability 5.5 / 9

Regulatory Posture 2.9 / 15

Agent readiness — 42/100 · agent ready

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 6 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 6 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 0 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Securities & Market Data 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)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
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

6 more unmet checks in the Agent Readiness table above.

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

Developer Ergonomics scores 0.0 — up to +20.0 composite points
Access Clarity scores 10.5 — up to +17.9 composite points
Operational Transparency scores 0.0 — up to +13.0 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/cefradar-com/apis.yml: open an issue on github.com/api-evangelist/cefradar-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 4

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)

OAuth 2.0 Protected Resource Metadata

measured — observed by APIs.io (verified)

Dynamic Client Registration

measured — observed by APIs.io (published)

OpenAPI

measured — observed by APIs.io (published)

APIs 5

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

CEF Radar Account API

Your own key's plan and budget (the only call that needs a key).

CEF Radar Events API

Dated announcements a holder may need to act on, with the date to act by.

CEF Radar Funds API

U.S. closed-end funds: the list, one fund, its facts, holdings and announcements.

CEF Radar Investors API

The large investors who file notices about owning 5% or more of a fund, and those notices.

CEF Radar Search API

Search-box suggestions and 'which funds hold X'.

MCP Servers 1

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

CEF Radar MCP Server

Remote MCP server at cefradar.com.

MCP SERVER

Semantic Vocabularies 1

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

Cefradar Com Context

2 classes · 6 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

CEF Radar API Rules

55 rules · 52 errors 2 warnings 1 info

SPECTRAL

Security Posture 1

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

Cefradar Com Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Agentic Access 1

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

Cefradar Com Agentic Access

14 operations

14 operations · 0 acting

AGENTIC

Resources

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

LLMsTxt

MCPServer

WellKnown

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

ErrorCatalog

Conformance

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 1

The organization behind the API

Website

Website

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: cefradar-com
name: CEF Radar
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - security
  generated: '2026-11-06'
  method: derived
image: https://cefradar.com/static/og/default.png?v=1789691814
description: CEF Radar provides plain‑words analysis of closed‑end fund activity. Users can enter a fund ticker or name to
  see if large investors are pushing for changes, whether the fund has announced buy‑backs, votes, or closures, and get explanations
  of filings. The service offers guides on tender offers, proxy votes, activist investors, return of capital, expense ratios,
  leverage, liquidations, mergers, and term funds, all illustrated with live SEC filing examples.
url: https://artifacts.apis.io/cefradar-com/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-04 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-11-04'
modified: '2026-11-04'
tags:
- Closed‑end funds
- SEC Filings
- Investor alerts
- Fund activity
- Buybacks
tags_raw:
- Closed‑end funds
- SEC filings
- Investor alerts
- Fund activity
- Buy‑backs
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/cefradar-com-agentic-access.yml
- type: Spectral
  url: rules/cefradar-com-rules.yml
- type: JSONLD
  url: json-ld/cefradar-com-context.jsonld
- type: Vocabulary
  url: vocabulary/cefradar-com-vocabulary.yml
- type: DataModel
  url: data-model/cefradar-com-data-model.yml
- type: ErrorCatalog
  url: errors/cefradar-com-problem-types.yml
- type: Conformance
  url: conformance/cefradar-com-conformance.yml
- type: LLMsTxt
  url: llms/cefradar-com-llms.txt
- type: MCPServer
  url: mcp/cefradar-com-mcp.yml
- type: WellKnown
  url: well-known/cefradar-com-well-known.yml
- type: Hosts
  url: hosts/cefradar-com-hosts.yml
- type: Vendors
  url: vendors/cefradar-com-vendors.yml
- type: TermsOfService
  url: https://cefradar.com/terms
- type: PrivacyPolicy
  url: https://cefradar.com/privacy
- type: DomainSecurity
  url: security/cefradar-com-domain-security.yml
- type: Website
  url: https://cefradar.com/
apis:
- aid: cefradar-com:cefradar-com-account-api
  name: CEF Radar Account API
  description: Your own key's plan and budget (the only call that needs a key).
  humanURL: https://cefradar.com/api
  baseURL: https://cefradar.com
  tags:
  - Account
  tags_raw:
  - account
  properties:
  - type: OpenAPI
    url: openapi/cefradar-com-account-api-openapi.yml
- aid: cefradar-com:cefradar-com-events-api
  name: CEF Radar Events API
  description: Dated announcements a holder may need to act on, with the date to act by.
  humanURL: https://cefradar.com/api
  baseURL: https://cefradar.com
  tags:
  - Event
  tags_raw:
  - events
  properties:
  - type: OpenAPI
    url: openapi/cefradar-com-events-api-openapi.yml
- aid: cefradar-com:cefradar-com-funds-api
  name: CEF Radar Funds API
  description: 'U.S. closed-end funds: the list, one fund, its facts, holdings and announcements.'
  humanURL: https://cefradar.com/api
  baseURL: https://cefradar.com
  tags:
  - Fund
  tags_raw:
  - funds
  properties:
  - type: OpenAPI
    url: openapi/cefradar-com-funds-api-openapi.yml
- aid: cefradar-com:cefradar-com-investors-api
  name: CEF Radar Investors API
  description: The large investors who file notices about owning 5% or more of a fund, and those notices.
  humanURL: https://cefradar.com/api
  baseURL: https://cefradar.com
  tags:
  - Investor
  tags_raw:
  - investors
  properties:
  - type: OpenAPI
    url: openapi/cefradar-com-investors-api-openapi.yml
- aid: cefradar-com:cefradar-com-search-api
  name: CEF Radar Search API
  description: Search-box suggestions and 'which funds hold X'.
  humanURL: https://cefradar.com/api
  baseURL: https://cefradar.com
  tags:
  - Search
  tags_raw:
  - search
  properties:
  - type: OpenAPI
    url: openapi/cefradar-com-search-api-openapi.yml
x-enrichment:
  date: '2026-11-04'
  status: enriched
  artifacts_added: 23
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

CEF Radar API — frequently asked questions

Does CEF Radar have an API?

Yes. APIs.io lists 5 APIs from CEF Radar, including CEF Radar Account API, CEF Radar Events API and CEF Radar Funds API, and 2 more.

Is there an OpenAPI specification for the CEF Radar API?

Yes. APIs.io indexes 5 OpenAPI specifications for CEF Radar, each linked for download from this page.

Does CEF Radar have an MCP server?

Yes. APIs.io lists 1 MCP server for CEF Radar: Remote MCP server at cefradar.com.

Is the CEF Radar API ready for AI agents?

CEF Radar has a Kin Score of 23.0 out of 100 (emerging) and an Agent Readiness score of 42.4 (agent-ready), scored by API Evangelist on 2026-11-06.

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