Stamped

Stamped is a reviews, ratings, and loyalty platform for e-commerce brands on Shopify, BigCommerce, and custom/headless platforms. Its V3 API is organized into three domains: Merchant Data (customers, products, orders), Loyalty Operations (points adjustments, VIP tiers, reward redemption, activities, and program reporting), and Reviews. Authentication is a shop-scoped Private API Key sent in the stamped-api-key header. Surfaced as a portfolio company of GV and enriched by the API Evangelist pipeline from Stamped's public developer documentation at developers.stamped.io.

Stamped publishes 5 APIs on the APIs.io network, including Customer Actions API, Customers API, Orders API, and 2 more. Tagged areas include Company, Consumer, Reviews, Ratings, and Loyalty.

Stamped’s developer surface includes documentation, API reference, getting-started guide, support, authentication, and 13 more developer resources.

🌐 Visit website 📡 Source on GitHub
36.9/100 thin ▬ flat Agent 65/100 agent native Full breakdown ↓
scored 2026-07-28 · rubric v0.5
AccessSelf serve
5 APIs 1 MCP Servers
CompanyConsumerReviewsRatingsLoyaltyE-CommerceCustomer MarketingShopify

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-28 · rubric v0.5
Composite quality — 36.9/100 · thin
Contract Quality 12.8 / 25
Developer Ergonomics 13.0 / 20
Commercial Clarity 0.0 / 20
Operational Transparency 1.0 / 13
Governance 0.0 / 12
Discoverability 10.0 / 10
Agent readiness — 65/100 · agent native
Machine-Readable Contract 18 / 18
Agentic Access Contract 15 / 15
MCP Server 12 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 8 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 0 / 7
Typed Event Surface 0 / 6
Agent Skills 5 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
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/stamped: 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 5

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

Stamped Customer Actions API

The Customer Actions API from Stamped — 6 operation(s) for customer actions.

Stamped Customers API

The Customers API from Stamped — 3 operation(s) for customers.

Stamped Orders API

The Orders API from Stamped — 3 operation(s) for orders.

Stamped Products API

The Products API from Stamped — 3 operation(s) for products.

Stamped Program Reporting API

The Program Reporting API from Stamped — 2 operation(s) for program reporting.

MCP Servers 1

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

stamped-mcp.yml

MCP SERVER

Security Posture 2

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

Stamped Authentication

apiKey · 1 scheme

SECURITY

Stamped Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Stamped Agentic Access

26 operations · 15 acting

26 operations · 15 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal
DeveloperPortal
 GettingStarted
GettingStarted

Documentation 2

Reference material describing how the API behaves

Documentation
Documentation
 APIReference
APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt
LLMsTxt
 AgenticAccess
AgenticAccess
 MCPServer
MCPServer
 AgentSkill
AgentSkill

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conventions
Conventions
 ErrorCatalog
ErrorCatalog
 DataModel
DataModel
 Conformance
Conformance
 Lifecycle
Lifecycle

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication

Operate 2

Status, limits, changes, and where to get help

Support
Support
 Deprecation
Deprecation

Company 1

The organization behind the API

Website
Website

Source (apis.yml)

apis.yml Raw ↑ 
aid: stamped
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/stamped.png
name: Stamped
description: 'Stamped is a reviews, ratings, and loyalty platform for e-commerce brands on Shopify, BigCommerce, and custom/headless
  platforms. Its V3 API is organized into three domains: Merchant Data (customers, products, orders), Loyalty Operations (points
  adjustments, VIP tiers, reward redemption, activities, and program reporting), and Reviews. Authentication is a shop-scoped
  Private API Key sent in the stamped-api-key header. Surfaced as a portfolio company of GV and enriched by the API Evangelist
  pipeline from Stamped''s public developer documentation at developers.stamped.io.'
url: https://raw.githubusercontent.com/api-evangelist/stamped/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- gv
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Consumer
- Reviews
- Ratings
- Loyalty
- E-Commerce
- Customer Marketing
- Shopify
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- aid: stamped:stamped-customer-actions-api
  name: Stamped Customer Actions API
  description: The Customer Actions API from Stamped — 6 operation(s) for customer actions.
  humanURL: https://developers.stamped.io/docs/merchant-apis
  baseURL: https://stamped.io/api/v3/merchant
  tags:
  - Customer Actions
  properties:
  - type: OpenAPI
    url: openapi/stamped-customer-actions-api-openapi.yml
- aid: stamped:stamped-customers-api
  name: Stamped Customers API
  description: The Customers API from Stamped — 3 operation(s) for customers.
  humanURL: https://developers.stamped.io/docs/merchant-apis
  baseURL: https://stamped.io/api/v3/merchant
  tags:
  - Customers
  properties:
  - type: OpenAPI
    url: openapi/stamped-customers-api-openapi.yml
- aid: stamped:stamped-orders-api
  name: Stamped Orders API
  description: The Orders API from Stamped — 3 operation(s) for orders.
  humanURL: https://developers.stamped.io/docs/merchant-apis
  baseURL: https://stamped.io/api/v3/merchant
  tags:
  - Orders
  properties:
  - type: OpenAPI
    url: openapi/stamped-orders-api-openapi.yml
- aid: stamped:stamped-products-api
  name: Stamped Products API
  description: The Products API from Stamped — 3 operation(s) for products.
  humanURL: https://developers.stamped.io/docs/merchant-apis
  baseURL: https://stamped.io/api/v3/merchant
  tags:
  - Products
  properties:
  - type: OpenAPI
    url: openapi/stamped-products-api-openapi.yml
- aid: stamped:stamped-program-reporting-api
  name: Stamped Program Reporting API
  description: The Program Reporting API from Stamped — 2 operation(s) for program reporting.
  humanURL: https://developers.stamped.io/docs/merchant-apis
  baseURL: https://stamped.io/api/v3/merchant
  tags:
  - Program Reporting
  properties:
  - type: OpenAPI
    url: openapi/stamped-program-reporting-api-openapi.yml
common:
- type: DomainSecurity
  url: security/stamped-domain-security.yml
- type: Website
  url: https://stamped.io
- type: DeveloperPortal
  url: https://developers.stamped.io
- type: Documentation
  url: https://developers.stamped.io/docs/getting-started
- type: APIReference
  url: https://developers.stamped.io/reference/
- type: GettingStarted
  url: https://developers.stamped.io/docs/getting-started
- type: Support
  url: https://stampedsupport.zendesk.com/hc/en-us
- type: LLMsTxt
  url: llms/stamped-llms.txt
- type: Authentication
  url: authentication/stamped-authentication.yml
- type: AgenticAccess
  url: agentic-access/stamped-agentic-access.yml
- type: Conventions
  url: conventions/stamped-conventions.yml
- type: ErrorCatalog
  url: errors/stamped-problem-types.yml
- type: DataModel
  url: data-model/stamped-data-model.yml
- type: MCPServer
  url: mcp/stamped-mcp.yml
- type: Conformance
  url: conformance/stamped-conformance.yml
- type: Lifecycle
  url: lifecycle/stamped-lifecycle.yml
- type: Deprecation
  url: lifecycle/stamped-lifecycle.yml
- type: AgentSkill
  url: skills/_index.yml
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 18
  pass: local-v1