# Spiber Inc.

> Spiber Inc. is a Japanese biotechnology and advanced-materials company founded in 2007 and
> headquartered in Tsuruoka, Yamagata Prefecture. It develops Brewed Protein materials — structural
> proteins produced by precision fermentation of plant-derived sugars, spun into fibers, resins and
> films as animal-free, petroleum-free alternatives to silk, wool, cashmere, leather and synthetic
> polymers. Spiber is a materials manufacturer, not a software vendor.

## What Spiber does NOT publish

Spiber operates no developer program. There is no developer portal, no API reference, no OpenAPI
or AsyncAPI specification, no GraphQL endpoint, no SDK, no CLI, no MCP server, no A2A agent card,
no sandbox, no status page, no changelog, no pricing or plans, and no `/.well-known/` document on
any host. Every one of those was probed on 2026-08-29 and returned 404 or was absent. Do not look
for a Spiber API key; none is issued.

## The one machine-readable surface

Spiber's corporate site runs on a headless WordPress backend whose REST API is publicly readable
and names itself "Spiber API" in its own discovery document. It is website infrastructure, not a
product, and Spiber publishes no documentation for it. Every response carries
`X-Robots-Tag: noindex`.

- [API discovery document](https://spiber.xsrv.jp/api/wp-json/): route table, namespaces, and the
  declared authentication mechanism
- [English news](https://spiber.xsrv.jp/api/wp-json/wp/v2/news_en): English-language news items
- [Academic papers](https://spiber.xsrv.jp/api/wp-json/wp/v2/academic-papers): Spiber's published
  research output
- [Creations](https://spiber.xsrv.jp/api/wp-json/wp/v2/creations): brand collaborations and
  finished goods
- [Open positions](https://spiber.xsrv.jp/api/wp-json/wp/v2/positions): open roles
- [Projects](https://spiber.xsrv.jp/api/wp-json/wp/v2/projects): projects, filterable by department

Conventions: anonymous GET only; `page` / `per_page` pagination with `X-WP-Total` and
`X-WP-TotalPages` response headers and an RFC 8288 `Link: rel="next"`; errors are the WordPress
`{code, message, data.status}` object served as `application/json`, not RFC 9457 — and messages are
returned in Japanese, so branch on `code`, never on `message`. No rate-limit headers are sent.

## Company

- [Spiber Inc.](https://spiber.inc/en): official website
- [About](https://spiber.inc/en/about): company overview
- [Brewed Protein](https://spiber.inc/en/protein): the material and how it is made
- [Innovation](https://spiber.inc/en/innovation): research and technology
- [Sustainability](https://spiber.inc/en/sustainability): environmental program and LCA
- [Academic papers](https://spiber.inc/en/academic-papers): peer-reviewed research
- [News and stories](https://spiber.inc/en/news): newsroom ([RSS](https://spiber.inc/en/news/feed))
- [Careers](https://spiber.inc/en/careers): open roles
- [Privacy policy](https://spiber.inc/en/privacy-policy)
- [GitHub](https://github.com/Spiber): verified organization, currently no public repositories

## Optional

- [Projects](https://spiber.inc/en/projects)
- [Creations](https://spiber.inc/en/creations)
- [Our mission](https://spiber.inc/en/our-mission)
- [Cookie policy](https://spiber.inc/en/cookie-policy)