SellerX

SellerX is a Berlin-based consumer-brand builder, founded in 2020, that acquires, operates and scales everyday consumer products into omnichannel global brands. Originally one of Europe's largest Amazon FBA aggregators, it merged with KW Commerce in 2021 and with the US aggregator Elevate Brands in 2023, and has since repositioned itself from an aggregator into a brand builder. The group operates 20+ brands and 25k+ products across 10+ countries from hubs in Berlin, London, Manila and Dongguan, and has raised more than $750M in equity and debt from Sofina, L Catterton, Cherry Ventures, Felix Capital, 83North, an ADIA subsidiary, BlackRock and Victory Park Capital. SellerX sells consumer goods to consumers through marketplaces and its own channels; it publishes no public API, developer portal, SDK or machine-readable specification of its own.

SellerX is listed with 1 API on the APIs.io network. Tagged areas include Company, E-Commerce, Consumer Brand, Retail, and Amazon Aggregator.

SellerX’s developer surface includes engineering blog, legal docs, authentication, and 12 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

16.6/100 emerging ▬ flat Agent 11/100 agent aware Front door AI 1/6 silent Heartbeat 0/100 dormant Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessSelf serve

1 API 1 MCP Servers

Company E-Commerce Consumer Brand RetailAmazon AggregatorMarketplace-Seller Consumer Packaged Goods Germany

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 16.6/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 2.4 / 17

Access Clarity 1.8 / 17

Operational Transparency 0.3 / 11

Contract Governance 1.9 / 10

Discoverability 5.8 / 9

Regulatory Posture 4.6 / 15

Agent readiness — 11/100 · agent aware

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 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

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

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
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)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)

11 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
Access Clarity scores 10.5 — up to +17.9 composite points
Developer Ergonomics scores 14.3 — up to +17.1 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/sellerx/apis.yml: open an issue on github.com/api-evangelist/sellerx 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 →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Amazon Seller Ecosystem (Selling Partner Appstore, Amazon Ads partners)	undeclared	-	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 1

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 (verified)

APIs 1

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

SellerX MCP Server

A live, remotely hosted Model Context Protocol server operated by SellerX at mcp.sellerx.com. The endpoint requires an OAuth 2.1 bearer token, so the tool manifest is auth-gated...

MCP Servers 1

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

SellerX MCP Server

Remote MCP server at mcp.sellerx.com over HTTP.

MCP SERVER

Security Posture 2

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

Sellerx Authentication

oauth2 · 1 scheme

SECURITY

Sellerx Domain Security

TLSv1.2 · DMARC

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Sellerx Scopes

1 scope · authorizationCode

1 scopes

SCOPES

Resources

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

MCPServer

MCPServer

WellKnown

WellKnown

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Conformance

Conformance

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 3

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

OAuthScopes

OAuthScopes

Commercial 2

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

Legal

Legal

Company 5

The organization behind the API

Blog

Website

About

Careers

LinkedIn

Other 1

Properties that don't map to a standard resource type

Products

Products

Source (apis.yml)

aid: sellerx
name: SellerX
description: SellerX is a Berlin-based consumer-brand builder, founded in 2020, that acquires, operates and scales everyday
  consumer products into omnichannel global brands. Originally one of Europe's largest Amazon FBA aggregators, it merged with
  KW Commerce in 2021 and with the US aggregator Elevate Brands in 2023, and has since repositioned itself from an aggregator
  into a brand builder. The group operates 20+ brands and 25k+ products across 10+ countries from hubs in Berlin, London,
  Manila and Dongguan, and has raised more than $750M in equity and debt from Sofina, L Catterton, Cherry Ventures, Felix
  Capital, 83North, an ADIA subsidiary, BlackRock and Victory Park Capital. SellerX sells consumer goods to consumers through
  marketplaces and its own channels; it publishes no public API, developer portal, SDK or machine-readable specification of
  its own.
url: https://raw.githubusercontent.com/api-evangelist/sellerx/refs/heads/main/apis.yml
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: self-serve
  trial: false
  try_now: false
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Self-serve signup
  confidence: medium
  probe_state: covered
  source:
  - authentication
  - scopes
  - security
  generated: '2026-11-06'
  method: derived
image: https://www.sellerx.com/logo.png
x-type: company
x-source: harvest:secondary-market
specificationVersion: '0.23'
created: '2026-08-05'
modified: '2026-10-06'
tags:
- Company
- E-Commerce
- Consumer Brand
- Retail
- Amazon Aggregator
- Marketplace-Seller
- Consumer Packaged Goods
- Germany
tags_raw:
- Company
- E-Commerce
- Consumer Brands
- Retail
- Amazon Aggregator
- Marketplace Seller
- Consumer Packaged Goods
- Germany
apis:
- aid: sellerx:mcp
  name: SellerX MCP Server
  description: A live, remotely hosted Model Context Protocol server operated by SellerX at mcp.sellerx.com. The endpoint
    requires an OAuth 2.1 bearer token, so the tool manifest is auth-gated, but the server publishes RFC 8414 authorization-server
    metadata and RFC 9728 protected-resource metadata anonymously, along with a dynamic client registration endpoint and mandatory
    PKCE (S256). SellerX does not link to, document, or advertise this server anywhere on its corporate site; it was discovered
    through Certificate Transparency logs for sellerx.com.
  humanURL: https://mcp.sellerx.com/.well-known/oauth-protected-resource/mcp
  baseURL: https://mcp.sellerx.com/mcp
  tags:
  - MCP
  - OAuth
  - Agents
  - Authentication
  tags_raw:
  - MCP
  - Model Context Protocol
  - OAuth
  - Agents
  - Authentication
  properties:
  - type: MCPServer
    url: mcp/sellerx-mcp.yml
  - type: Authentication
    url: authentication/sellerx-authentication.yml
  - type: OAuthScopes
    url: scopes/sellerx-scopes.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- url: https://www.sellerx.com/blog/
  type: Blog
- type: DomainSecurity
  url: security/sellerx-domain-security.yml
- type: Website
  url: https://www.sellerx.com/
- type: About
  url: https://www.sellerx.com/about/
- type: Products
  url: https://www.sellerx.com/brands/
- type: Careers
  url: https://www.sellerx.com/work-with-us/
- type: PrivacyPolicy
  url: https://www.sellerx.com/privacy-policy
- type: Legal
  url: https://www.sellerx.com/imprint
- type: GitHubOrganization
  url: https://github.com/kwcommerce
- type: LinkedIn
  url: https://www.linkedin.com/company/seller-x
- type: MCPServer
  url: mcp/sellerx-mcp.yml
- type: Authentication
  url: authentication/sellerx-authentication.yml
- type: OAuthScopes
  url: scopes/sellerx-scopes.yml
- type: WellKnown
  url: well-known/sellerx-well-known.yml
- type: Conformance
  url: conformance/sellerx-conformance.yml
x-enrichment:
  date: '2026-08-05'
  status: enriched
  artifacts_added: 8
  pass: local-v1
x-coverage:
  state: covered
  reason: null
  detail: SellerX runs a live remote MCP server at https://mcp.sellerx.com/mcp that it does not link or document anywhere
    public — it was found only through Certificate Transparency logs for sellerx.com. Its OAuth 2.1 discovery metadata (RFC
    8414 + RFC 9728) is served anonymously and is captured verbatim, but the JSON-RPC tools/list manifest returns 401 invalid_token,
    so the tool set and its input schemas are auth-gated and deliberately not recorded. The corporate site publishes no API
    of any kind and answers HTTP 200 with an identical SPA body for every path, including nonexistent ones.
  evidence:
  - url: https://mcp.sellerx.com/.well-known/oauth-authorization-server
    status: 200
  - url: https://mcp.sellerx.com/.well-known/oauth-protected-resource/mcp
    status: 200
  - url: https://mcp.sellerx.com/mcp
    status: 401
  - url: https://www.sellerx.com/openapi.json
    status: 200
  checked: '2026-08-05'

SellerX API — frequently asked questions

Does SellerX have an API?

Yes. APIs.io lists 1 API from SellerX, including SellerX MCP Server.

How do I authenticate with the SellerX API?

SellerX uses bearer-token authentication (oauth2 · 1 scheme). The details are profiled on APIs.io as Sellerx Authentication.

Does SellerX have an MCP server?

Yes. APIs.io lists 1 MCP server for SellerX: Remote MCP server at mcp.sellerx.com over HTTP.

Is the SellerX API ready for AI agents?

SellerX has a Kin Score of 16.6 out of 100 (emerging) and an Agent Readiness score of 11.2 (agent-aware), scored by API Evangelist on 2026-11-06.

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