Collectors

Collectors (Collectors Holdings, Inc.) is the parent company behind PSA, PCGS, Beckett, SGC, Card Ladder, and Collectors vault and financial services — the infrastructure powering trust, authentication, grading, vaulting, and marketplace services for trading cards, coins, currency, and memorabilia. Its PSA brand publishes a public developer API for certificate verification, grading order and submission tracking, and population reports, secured with Bearer access tokens.

Collectors publishes 1 API on the APIs.io network: PSA Public API Methods API. Tagged areas include Company, Marketplace, Collectibles, Authentication, and Grading.

Collectors’ developer surface includes documentation, API reference, signup flow, engineering blog, authentication, and 15 more developer resources.

🌐 Visit website 📡 Source on GitHub

34.1/100 thin ▬ flat Agent 24/100 agent aware saas Full breakdown ↓
scored 2026-08-30 · rubric v0.17.2

AccessSelf serve

1 APIs 1 MCP Servers

Company Marketplace Collectibles Authentication Grading Trading Cards Verification

Kin Score

Kin Score How this is scored →
scored 2026-08-30 · rubric v0.17.2

Composite quality — 34.1/100 · thin

Contract Quality 8.2 / 21

Developer Ergonomics 7.2 / 17

Access Clarity 5.8 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.5 / 10

Discoverability 6.5 / 9

Regulatory Posture 5.9 / 15

Agent readiness — 24/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 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

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 4 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Surface 0 / 5

Regulatory Posture applies to this provider. Its tags matched the Payments 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.

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/.

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/collectors: 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.

MCP Servers 1

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

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

SignUp

SignUp

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

MCPServer

LLMsTxt

AgentSkill

AgenticAccess

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

DataModel

Lifecycle

Conformance

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

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

Overlay

Overlay

Source (apis.yml)

aid: collectors
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
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/collectors.png
name: Collectors
description: Collectors (Collectors Holdings, Inc.) is the parent company behind PSA, PCGS, Beckett, SGC, Card Ladder, and
  Collectors vault and financial services — the infrastructure powering trust, authentication, grading, vaulting, and marketplace
  services for trading cards, coins, currency, and memorabilia. Its PSA brand publishes a public developer API for certificate
  verification, grading order and submission tracking, and population reports, secured with Bearer access tokens.
url: https://raw.githubusercontent.com/api-evangelist/collectors/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- d1-capital
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- Marketplace
- Collectibles
- Authentication
- Grading
- Trading Cards
- Verification
apis:
- aid: collectors:collectors-psa-public-api-methods-api
  name: Collectors PSA Public API Methods API
  description: The PSA Public API Methods API from Collectors — 6 operation(s) for psa public api methods.
  humanURL: https://www.psacard.com/publicapi/documentation
  baseURL: https://api.psacard.com/publicapi
  tags:
  - PSA Public API Methods
  properties:
  - type: OpenAPI
    url: openapi/collectors-psa-public-api-methods-api-openapi.yml
  - type: Swagger
    url: https://api.psacard.com/publicapi/swagger.json
  - type: Documentation
    url: https://www.psacard.com/publicapi/documentation
  - type: APIReference
    url: https://api.psacard.com/publicapi/swagger
  - type: Authentication
    url: authentication/collectors-authentication.yml
  - type: SignUp
    url: https://www.psacard.com/publicapi
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://www.collectors.com
- type: Documentation
  url: https://www.psacard.com/publicapi/documentation
- type: APIReference
  url: https://api.psacard.com/publicapi/swagger
- type: DeveloperPortal
  url: https://www.psacard.com/publicapi
- type: SignUp
  url: https://www.psacard.com/publicapi
- type: Blog
  url: https://blog.collectors.com
- type: TermsOfService
  url: https://app.collectors.com/collectorsuseragreement
- type: PrivacyPolicy
  url: https://app.collectors.com/privacypolicy
- type: Authentication
  url: authentication/collectors-authentication.yml
- type: Conventions
  url: conventions/collectors-conventions.yml
- type: ErrorCatalog
  url: errors/collectors-problem-types.yml
- type: DataModel
  url: data-model/collectors-data-model.yml
- type: Lifecycle
  url: lifecycle/collectors-lifecycle.yml
- type: Conformance
  url: conformance/collectors-conformance.yml
- type: MCPServer
  url: mcp/collectors-mcp.yml
- type: LLMsTxt
  url: llms/collectors-llms.txt
- type: Overlay
  url: overlays/collectors-psa-overlay.yaml
- type: AgentSkill
  url: skills/_index.yml
- type: AgenticAccess
  url: agentic-access/collectors-agentic-access.yml
- type: DomainSecurity
  url: security/collectors-domain-security.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

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Collectors

Kin Score

APIs 1

Collectors PSA Public API Methods API

Open Collections 2

API Collection

PSA Public PSA Public API Methods API