signed-com

Signed is an angel investor portfolio tracking platform that helps startup founders and investors monitor equity holdings, calculate returns, and stay informed about follow‑on opportunities. The service provides AI‑driven diligence, QSBS tax analysis, pro‑rata alerts, and automated portfolio updates, enabling users to track multiple entities such as funds, SPVs, LLCs, and personal holdings in one place. It offers free access to core features and premium tools for deeper financial insights.

signed-com is profiled on the APIs.io network. Tagged areas include Company, Angel Investing, Portfolio Tracking, Equity Management, and Startup Funding.

signed-com’s developer surface includes engineering blog, pricing, signup flow, and 12 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

14.5/100 emerging Agent 19/100 agent aware Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

0 APIs

Company Angel Investing Portfolio Tracking Equity Management Startup Funding

Kin Score

Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0

Composite quality — 14.5/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 0.4 / 17

Access Clarity 5.8 / 17

Operational Transparency 1.2 / 11

Contract Governance 0.0 / 10

Discoverability 4.1 / 9

Regulatory Posture 3.2 / 15

Agent readiness — 19/100 · agent aware

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 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 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

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
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
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
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes

9 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 2.4 — up to +19.5 composite points
Access Clarity scores 34.2 — up to +13.2 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/signed-com/apis.yml: open an issue on github.com/api-evangelist/signed-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 →

Security Posture 2

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

Signed Com Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Signed Com Vulnerability Disclosure

security.txt · contact published

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

Login

SignUp

SignUp

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

WellKnown

WellKnown

Access & Security 5

Authentication, authorization, and security posture

SecurityTxt

SecurityTxt

SecurityTxt

SecurityTxt

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Security

Security

Commercial 2

Pricing, plans, and the legal terms of use

Pricing

Pricing

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: signed-com
name: signed-com
image: https://signed.com/og.png
description: Signed is an angel investor portfolio tracking platform that helps startup founders and investors monitor equity
  holdings, calculate returns, and stay informed about follow‑on opportunities. The service provides AI‑driven diligence,
  QSBS tax analysis, pro‑rata alerts, and automated portfolio updates, enabling users to track multiple entities such as funds,
  SPVs, LLCs, and personal holdings in one place. It offers free access to core features and premium tools for deeper financial
  insights.
url: https://artifacts.apis.io/signed-com/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-30 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-30'
modified: '2026-10-30'
tags:
- Company
- Angel Investing
- Portfolio Tracking
- Equity Management
- Startup Funding
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: LLMsTxt
  url: llms/signed-com-llms.txt
- type: SecurityTxt
  url: well-known/signed-com-security.txt
- type: SecurityTxt
  url: well-known/signed-com-mcp-security.txt
- type: WellKnown
  url: well-known/signed-com-well-known.yml
- type: Hosts
  url: hosts/signed-com-hosts.yml
- type: Vendors
  url: vendors/signed-com-vendors.yml
- type: VulnerabilityDisclosure
  url: security/signed-com-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/signed-com-domain-security.yml
- type: Website
  url: https://signed.com/
- type: Blog
  url: https://signed.com/blog
- type: Login
  url: https://signed.com/sign_in
- type: Pricing
  url: https://signed.com/pricing
- type: PrivacyPolicy
  url: https://signed.com/privacy
- type: Security
  url: https://signed.com/investors/security
- type: SignUp
  url: https://signed.com/signup
apis: []
x-coverage:
  state: none
  reason: no-developer-program
  detail: No public developer program or API documentation is available on the website.
  evidence:
  - url: https://signed.com/openapi.json
    status: 404
  checked: '2026-10-30'
x-enrichment:
  date: '2026-10-30'
  status: enriched
  artifacts_added: 16
  pass: modular-v1
  engine: identity=oss,contract=oss,surfaces=oss,docs=oss,regulatory=oss

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