Souco
Souco (株式会社souco / souco Co., Ltd.) operates a warehouse-sharing marketplace and logistics resource optimization platform in Japan, connecting cargo owners with available space across a nationwide network of 3,000+ warehouses spanning all 47 prefectures. Businesses can secure short- or long-term storage on demand for a wide range of cargo — food ingredients, apparel, machinery, and documents — under ambient, refrigerated, frozen, or temperature-controlled conditions, with pickup and delivery coordination handled by the platform. Alongside the sharing marketplace, souco offers a rental-warehouse search portal, transportation services, and the Optis engine for optimizing logistics networks, plus consulting and DX support for the logistics industry. The company is backed by 500 Global and Sumitomo Corporation's corporate venture arm. souco is a customer-facing logistics platform and does not currently publish a public developer API, SDKs, or developer documentation; its digital surface is a login-gated web application at app.souco.space.
More than an index entry, but the surface is still mostly links rather than artifacts — the cohort most likely to move a full band from modest, well-targeted work.
API Evangelist profiles Souco the way a machine reads it — 1 machine-readable artifact, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — Souco scores 17.0/100 (emerging), with a separate agent-readiness read of 0/100 (human only). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance.
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
How we profile Souco
Each block below is one kind of artifact we hold for Souco. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
Security Posture 1
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Resources
Every other property we hold for Souco — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Get Started 2
Portal, sign-up, and the first successful call
Access & Security 1
Authentication, authorization, and security posture
Operate 1
Status, limits, changes, and where to get help
Commercial 3
Pricing, plans, and the legal terms of use
Company 2
The organization behind the API
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