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. 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
35.5/100 thin Agent 65/100 agent native Full breakdown ↓
scored 2026-07-20 · rubric v0.4
1 APIs 1 MCP Servers 0 Features
CompanyMarketplaceCollectiblesAuthenticationGradingTrading CardsVerification

API Rating

API Evangelist API Evangelist Rating How this is scored →
scored 2026-07-20 · rubric v0.4
Composite quality — 35.5/100 · thin
Contract Quality 9.4 / 25
Developer Ergonomics 10.4 / 20
Commercial Clarity 6.8 / 20
Operational Transparency 0.0 / 13
Governance 0.0 / 12
Discoverability 8.8 / 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/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

PSA Public API

Verify PSA certificates by cert number, retrieve certificate images, track grading order and submission progress, and read PSA spec population reports. Read-only, secured with a...

MCP Servers

collectors-mcp.yml

MCP SERVER

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
MCPServer
 LLMsTxt
LLMsTxt
 AgentSkill
AgentSkill
 AgenticAccess
AgenticAccess

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conventions
Conventions
 ErrorCatalog
ErrorCatalog
 DataModel
DataModel
 Lifecycle
Lifecycle
 Conformance
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)

apis.yml Raw ↑ 
aid: collectors
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: '0.20'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- Marketplace
- Collectibles
- Authentication
- Grading
- Trading Cards
- Verification
apis:
- name: PSA Public API
  description: Verify PSA certificates by cert number, retrieve certificate images, track grading order and submission progress,
    and read PSA spec population reports. Read-only, secured with a Bearer access token (apiKey in the Authorization header).
  humanURL: https://www.psacard.com/publicapi/documentation
  baseURL: https://api.psacard.com/publicapi
  tags:
  - Collectibles
  - Grading
  - Verification
  properties:
  - type: OpenAPI
    url: openapi/collectors-psa-openapi-original.json
  - 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