FilingSpy

FilingSpy is a product from FilingSpy LLC that tracks SEC filings and superinvestor portfolios, surfacing quarterly 13F changes, insider trades, and as-filed financials for US-listed securities. It publishes daily digests of filings worth a look, a tracked-investor consensus view, an insider screener, a 13F season tracker, and a Graham-style "cigar butts" screen, and ships an MCP server with an agent SKILL so AI agents can query SEC filing data directly.

FilingSpy is listed with 1 API on the APIs.io network. Tagged areas include SEC Filings, 13F, Insider Trading, Investor Tracking, and Financial Data.

FilingSpy’s developer surface includes sandbox, authentication, getting-started guide, pricing, support, and 15 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

35.4/100 thin Agent 31/100 agent ready Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

1 API 2 MCP Servers

SEC Filings13FInsider TradingInvestor TrackingFinancial Data MCP Agents Stock Market

Kin Score

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

Composite quality — 35.4/100 · thin

Contract Quality 0.0 / 21

Developer Ergonomics 8.8 / 17

Access Clarity 8.7 / 17

Operational Transparency 3.2 / 11

Contract Governance 1.9 / 10

Discoverability 6.1 / 9

Regulatory Posture 4.9 / 15

Agent readiness — 31/100 · agent ready

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 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 7 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 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 5 / 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):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document Ask about this →
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author Ask about this →
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 →
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link Ask about this →
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks Ask about this →

5 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 Ask about this →
Contract Governance scores 18.2 — up to +9.8 composite points Ask about this →
Access Clarity scores 51.1 — up to +9.8 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/filingspy-com/apis.yml: open an issue on github.com/api-evangelist/filingspy-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.

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)

APIs 1

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

FilingSpy MCP

FilingSpy's Model Context Protocol server exposes 24 tools over MCP Streamable HTTP (JSON-RPC 2.0) for querying tracked superinvestor portfolios (13F), insider trades (Form 4), ...

MCP Servers 2

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

FilingSpy MCP Server

MCP SERVER

MCP demo (anonymous)

MCP SERVER

FilingSpy API pricing

Prices published by FilingSpy, read 2026-11-07 from filingspy.com/pricing.

Plan	Price
Free account	No card needed
Pro	$14.99 a month · $149.99 a year (save 17%)
MCP	$9.99 a month · $99 a year (save 17%)

Plan details, limits and sources →

Rate limits

Free account daily tool-call budget: free: 200 a day
Pro / MCP daily tool-call budget: MCP plan and Pro: 2,000
Demo endpoint per-connection daily cap: the demo endpoint meters per client IP (20 calls a day)

All 6 limits →

Pricing Plans 1

Published pricing tiers and plan structures.

FilingSpy Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

FilingSpy Rate Limits

6 limits

RATE LIMITS

Examples 2

Example request and response payloads for these APIs.

FilingSpy Mcp Initialize

3 fields

EXAMPLE

FilingSpy Mcp Tools List

3 fields

EXAMPLE

Security Posture 2

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

FilingSpy Authentication

3 schemes

SECURITY

FilingSpy Domain Security

TLSv1.3 · DMARC

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

FilingSpy Scopes

1 scope

1 scopes

SCOPES

Resources

Get Started 3

Portal, sign-up, and the first successful call

Sandbox

Sandbox

GettingStarted

GettingStarted

DeveloperPortal

DeveloperPortal

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

WellKnown

WellKnown

Design & Contract 3

Pagination, idempotency, versioning, errors, and events

Conventions

Conventions

ErrorCatalog

ErrorCatalog

Conformance

Conformance

Access & Security 3

Authentication, authorization, and security posture

Authentication

Authentication

OAuthScopes

OAuthScopes

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

RateLimits

RateLimits

Support

Support

Commercial 4

Pricing, plans, and the legal terms of use

Plans

Pricing

TermsOfService

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: filingspy-com
name: FilingSpy
description: FilingSpy is a product from FilingSpy LLC that tracks SEC filings and superinvestor portfolios, surfacing quarterly
  13F changes, insider trades, and as-filed financials for US-listed securities. It publishes daily digests of filings worth
  a look, a tracked-investor consensus view, an insider screener, a 13F season tracker, and a Graham-style "cigar butts" screen,
  and ships an MCP server with an agent SKILL so AI agents can query SEC filing data directly.
url: https://artifacts.apis.io/filingspy-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)
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Self-serve signup
  confidence: high
  probe_state: covered
  source:
  - plans
  - authentication
  - scopes
  - rate-limits
  - security
  - sandbox
  generated: '2026-11-13'
  method: derived
specificationVersion: '0.20'
image: https://filingspy.com/og-image.png
created: '2026-11-07'
modified: '2026-11-07'
tags:
- SEC Filings
- 13F
- Insider Trading
- Investor Tracking
- Financial Data
- MCP
- Agents
- Stock Market
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: RateLimits
  url: rate-limits/filingspy-com-rate-limits.yml
- type: Plans
  url: plans/filingspy-com-plans-pricing.yml
- type: Conventions
  url: conventions/filingspy-com-conventions.yml
- type: Sandbox
  url: sandbox/filingspy-com-sandbox.yml
- type: Authentication
  url: authentication/filingspy-com-authentication.yml
- type: OAuthScopes
  url: scopes/filingspy-com-scopes.yml
- type: ErrorCatalog
  url: errors/filingspy-com-problem-types.yml
- type: Conformance
  url: conformance/filingspy-com-conformance.yml
- type: LLMsTxt
  url: llms/filingspy-com-llms.txt
- type: WellKnown
  url: well-known/filingspy-com-well-known.yml
- type: Hosts
  url: hosts/filingspy-com-hosts.yml
- type: Vendors
  url: vendors/filingspy-com-vendors.yml
- type: GettingStarted
  url: https://filingspy.com/skill
- type: DomainSecurity
  url: security/filingspy-com-domain-security.yml
- type: Website
  url: https://filingspy.com/
- type: DeveloperPortal
  url: https://filingspy.com/developers/mcp
- type: Pricing
  url: https://filingspy.com/pricing
- type: Support
  url: https://filingspy.com/support
- type: TermsOfService
  url: https://filingspy.com/terms
- type: PrivacyPolicy
  url: https://filingspy.com/privacy
apis:
- name: FilingSpy MCP
  description: FilingSpy's Model Context Protocol server exposes 24 tools over MCP Streamable HTTP (JSON-RPC 2.0) for querying
    tracked superinvestor portfolios (13F), insider trades (Form 4), as-filed XBRL financial statements, filing text search
    and consensus/screener data from SEC EDGAR. Authenticated endpoint at /api/mcp requires a Bearer `fsk_` key; an anonymous
    demo endpoint at /api/mcp/demo exposes the same tools under a per-connection daily budget.
  humanURL: https://filingspy.com/developers/mcp
  baseURL: https://filingspy.com/api/mcp
  properties:
  - type: MCPServer
    url: https://filingspy.com/api/mcp
  - type: MCPServer
    name: MCP demo (anonymous)
    url: https://filingspy.com/api/mcp/demo
  - type: AgentSkill
    url: https://filingspy.com/SKILL.md
  - type: LLMsTxt
    url: https://filingspy.com/llms.txt
  aid: filingspy-com:filingspy-mcp
x-coverage:
  state: covered
  reason: identity-verified
  detail: Name, description, tags, image, and link-property pointers established from the provider's own site (title "FilingSpy
    — Track Superinvestor Portfolios & SEC Filings", footer "© 2026 FilingSpy LLC").
  evidence:
  - url: https://filingspy.com/
    status: 200
  - url: https://filingspy.com/developers/mcp
    status: 200
  - url: https://filingspy.com/pricing
    status: 200
  - url: https://filingspy.com/support
    status: 200
  - url: https://filingspy.com/terms
    status: 200
  - url: https://filingspy.com/privacy
    status: 200
  - url: https://filingspy.com/og-image.png
    status: 200
x-enrichment:
  date: '2026-11-07'
  status: enriched
  artifacts_added: 22
  pass: modular-v1
  engine: identity=anthropic,contract=anthropic,surfaces=anthropic,docs=anthropic,regulatory=anthropic

FilingSpy API — frequently asked questions

Does FilingSpy have an API?

Yes. APIs.io lists 1 API from FilingSpy, including FilingSpy MCP.

How do I authenticate with the FilingSpy API?

FilingSpy documents its authentication (3 schemes). The details are profiled on APIs.io as FilingSpy Authentication.

How much does the FilingSpy API cost?

FilingSpy publishes its prices; its Free account plan is No card needed as of 2026-11-07. APIs.io lists 3 pricing plans for FilingSpy, with each plan's price, limits and inclusions under Pricing on this page.

Does FilingSpy have an MCP server?

Yes. APIs.io lists 2 MCP servers for FilingSpy.

Is the FilingSpy API ready for AI agents?

FilingSpy has a Kin Score of 35.4 out of 100 (thin) and an Agent Readiness score of 30.8 (agent-ready), scored by API Evangelist on 2026-11-13.

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