P2P, Inc.

P2P, Inc. is the Japanese insurtech startup behind justInCase, a smartphone-first micro-insurance (少額短期保険) provider offering short-term, on-demand consumer coverage such as smartphone protection, cancer insurance, and peer-to-peer risk-sharing products. The company was surfaced as a portfolio company of 500 Global and added to the API Evangelist network as an enrichment lead. As of this enrichment pass its justincase.jp domain returns a 307 redirect to Sony Shoutan Insurance (sony-sasti.jp), a Sony Financial Group micro-insurer, indicating the business has been absorbed. No public developer API, documentation, SDK, developer portal, or technical integration surface was found on either the original or the successor domain.

P2P, Inc. is profiled on the APIs.io network. Tagged areas include Company, Insurance, Insurtech, Micro-insurance, and Japan.

🌐 Visit website 📡 Source on GitHub

0.9/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

0 APIs

Company Insurance InsurtechMicro-insuranceJapan Fintech Consumer

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 0.9/100 · 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 4.3 / 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

Regulatory Posture applies to this provider. Its tags matched the Insurance 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/.

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 github.com/api-evangelist/p2p-inc: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Resources

Company 1

The organization behind the API

Website

Website

Source (apis.yml)

aid: p2p-inc
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:
  - url: https://justincase.jp
    status: 307
    note: declared website redirects to https://sony-sasti.jp/ — a different registrable domain (justincase.jp -> sony-sasti.jp),
      possible rename or acquisition (probed 2026-09-03, roadmap#169)
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/p2p-inc.png
name: P2P, Inc.
description: P2P, Inc. is the Japanese insurtech startup behind justInCase, a smartphone-first micro-insurance (少額短期保険) provider
  offering short-term, on-demand consumer coverage such as smartphone protection, cancer insurance, and peer-to-peer risk-sharing
  products. The company was surfaced as a portfolio company of 500 Global and added to the API Evangelist network as an enrichment
  lead. As of this enrichment pass its justincase.jp domain returns a 307 redirect to Sony Shoutan Insurance (sony-sasti.jp),
  a Sony Financial Group micro-insurer, indicating the business has been absorbed. No public developer API, documentation,
  SDK, developer portal, or technical integration surface was found on either the original or the successor domain.
url: https://raw.githubusercontent.com/api-evangelist/p2p-inc/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- 500-global
x-tier: stub
x-tier-reason: portfolio-lead
x-website-status: 307 redirect https://justincase.jp -> https://sony-sasti.jp (Sony Shoutan Insurance, Sony Financial Group);
  no independent web presence found
x-api-surface: none
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Company
- Insurance
- Insurtech
- Micro-insurance
- Japan
- Fintech
- Consumer
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://justincase.jp
x-enrichment:
  date: '2026-07-20'
  status: nochange
  artifacts_added: 0
  pass: local-v1

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