Poshmark

Poshmark is a social commerce marketplace where people in the US, Canada, Australia and India buy and sell new and secondhand fashion, accessories, home goods, beauty products, and electronics. Sellers list items from their closets, share and cross-promote listings across the community, host live selling shows, and ship using prepaid labels while Poshmark handles payments and buyer protection. Founded 2011, IPO 2021, acquired by Naver in 2023. Poshmark runs a consumer web and mobile marketplace backed by internal APIs but does not publish a public developer API, SDK, or developer portal; this profile captures its public web, security, and identity surface for the API Evangelist network.

Poshmark is profiled on the APIs.io network. Tagged areas include Company, Marketplace, Resale, Fashion, and E-Commerce.

Poshmark’s developer surface includes engineering blog, support, signup flow, and 6 more developer resources.

🌐 Visit website 📡 Source on GitHub

13.6/100 emerging ▬ flat Agent 0/100 human only saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

0 APIs

Company Marketplace Resale Fashion E-Commerce Social Commerce Secondhand Retail

Kin Score

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

Composite quality — 13.6/100 · emerging

Contract Quality 0.0 / 25

Developer Ergonomics 1.4 / 20

Access Clarity 6.8 / 20

Operational Transparency 0.3 / 13

Contract Governance 0.0 / 12

Discoverability 5.0 / 10

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

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.

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/poshmark: 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 →

Security Posture 1

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

Poshmark Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

SignUp

SignUp

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 1

Properties that don't map to a standard resource type

ParentCompany

ParentCompany

Source (apis.yml)

aid: poshmark
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/poshmark.png
name: Poshmark
description: Poshmark is a social commerce marketplace where people in the US, Canada, Australia and India buy and sell new
  and secondhand fashion, accessories, home goods, beauty products, and electronics. Sellers list items from their closets,
  share and cross-promote listings across the community, host live selling shows, and ship using prepaid labels while Poshmark
  handles payments and buyer protection. Founded 2011, IPO 2021, acquired by Naver in 2023. Poshmark runs a consumer web and
  mobile marketplace backed by internal APIs but does not publish a public developer API, SDK, or developer portal; this profile
  captures its public web, security, and identity surface for the API Evangelist network.
url: https://raw.githubusercontent.com/api-evangelist/poshmark/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- ggv-capital
- kindred-ventures
- mayfield
- menlo-ventures
- uncork-capital
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Company
- Marketplace
- Resale
- Fashion
- E-Commerce
- Social Commerce
- Secondhand
- Retail
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: ParentCompany
  url: https://apis.io/providers/naver/
  name: Naver
  x-relationship: acquired
  x-evidence: Founded 2011, IPO 2021, acquired by Naver in 2023.
- type: Website
  url: https://poshmark.com/
- type: Blog
  url: https://blog.poshmark.com/
- type: Support
  url: https://poshmark.com/faq
- type: TermsOfService
  url: https://poshmark.com/terms
- type: PrivacyPolicy
  url: https://poshmark.com/privacy
- type: SignUp
  url: https://poshmark.com/signup
- type: GitHubOrganization
  url: https://github.com/poshmark
- type: DomainSecurity
  url: security/poshmark-domain-security.yml
x-enrichment:
  date: '2026-07-20'
  status: minimal
  artifacts_added: 1
  pass: local-v1

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