Mercari

Mercari is a peer-to-peer marketplace for new and used goods, operating in Japan and the United States. Mercari does not maintain a public developer API; integration is restricted to approved partners (e.g., shipping carriers, payment partners) under direct agreements.

Mercari publishes 1 API on the APIs.io network. Tagged areas include Marketplace, Resale, P2P, and Ecommerce.

Mercari’s developer surface includes engineering blog and 8 more developer resources.

🌐 Visit website 📡 Source on GitHub

14.6/100 emerging ▬ flat Agent 3/100 human only Full breakdown ↓
scored 2026-08-05 · rubric v0.9.1

1 APIs

MarketplaceResaleP2PEcommerce

Kin Score

Kin Score How this is scored →
scored 2026-08-05 · rubric v0.9.1

Composite quality — 14.6/100 · emerging

Contract Quality 0.0 / 25

Developer Ergonomics 0.4 / 20

Commercial Clarity 5.8 / 20

Operational Transparency 3.4 / 13

Governance 0.0 / 12

Discoverability 5.0 / 10

Agent readiness — 3/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

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 7 / 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

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/mercari: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 1

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

Mercari Partner API

Partner-only API access for shipping, payment, and integration partners. Not self-serve; access granted under partnership agreements.

Pricing Plans 1

Published pricing tiers and plan structures.

Mercari Plans Pricing

1 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Mercari Rate Limits

1 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

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

RateLimits

RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

Company 3

The organization behind the API

LinkedIn

Website

Website

Blog

Blog

Other 1

Properties that don't map to a standard resource type

Developer

Developer

Source (apis.yml)

aid: mercari
url: https://raw.githubusercontent.com/api-evangelist/mercari/refs/heads/main/apis.yml
name: Mercari
kind: company
description: Mercari is a peer-to-peer marketplace for new and used goods, operating in Japan and the United States. Mercari
  does not maintain a public developer API; integration is restricted to approved partners (e.g., shipping carriers, payment
  partners) under direct agreements.
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/mercari.png
tags:
- Marketplace
- Resale
- P2P
- Ecommerce
created: '2026-05-08'
modified: '2026-05-08'
specificationVersion: '0.19'
apis:
- aid: mercari:partner-api
  name: Mercari Partner API
  description: Partner-only API access for shipping, payment, and integration partners. Not self-serve; access granted under
    partnership agreements.
  humanURL: https://about.mercari.com/en/business/
  tags:
  - Partner
  - Restricted
  properties:
  - type: Partnerships
    url: https://about.mercari.com/en/business/
common:
- type: DomainSecurity
  url: security/mercari-domain-security.yml
- type: GitHubOrganization
  url: https://github.com/mercari
- type: LinkedIn
  url: https://www.linkedin.com/company/mercari-inc-
- type: Website
  url: https://www.mercari.com/
- type: Developer
  url: https://about.mercari.com/en/business/
- type: Plans
  url: plans/mercari-plans-pricing.yml
- type: RateLimits
  url: rate-limits/mercari-rate-limits.yml
- type: FinOps
  url: finops/mercari-finops.yml
- url: https://about.mercari.com/en/press/news/
  type: Blog
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com