Centering Lab

Centering Lab provides a free online card centering tool and app for collectors of Pokémon, One Piece, and sports cards. Users can check PSA, BGS, CGC, and SGC grades by uploading a photo directly from Android or iPhone browsers. The service requires no installation, no upload to a server, and operates entirely in the browser, offering a quick calculator and visual checker for card alignment and centering.

Centering Lab publishes 5 API contracts indexed on the APIs.io network, including Grade API, Health API, Measure API, and 2 more. Tagged areas include Cards, Centering, Collectors, and Web App.

The Centering Lab catalog on APIs.io includes 1 Spectral governance ruleset.

Centering Lab’s developer surface includes documentation, API reference, authentication, and 13 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

26.6/100 thin Agent 38/100 agent ready Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 published contract 1 MCP Servers 1 Agent Skills

CardsCenteringCollectors Web App

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 26.6/100 · thin

Contract Quality 10.5 / 21

Developer Ergonomics 3.7 / 17

Access Clarity 1.8 / 17

Operational Transparency 0.0 / 11

Contract Governance 1.9 / 10

Discoverability 4.8 / 9

Regulatory Posture 2.8 / 15

Agent readiness — 38/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 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 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 5 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

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.

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.

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/.

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<a href="https://apis.io/providers/centeringlab-com/"><img src="https://apis.io/badge/centeringlab-com/card.svg" alt="Centering Lab on APIs.io — Kin Score by API Evangelist"></a>

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Agent readiness — checks not met, largest first (exact, from this profile):

Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks
Documented Reversibility +6 pts — a reversal operation in the contract, graded up when a window is documented too

3 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Access Clarity scores 10.5 — up to +17.9 composite points
Developer Ergonomics scores 22.0 — up to +15.6 composite points
Operational Transparency scores 0.0 — up to +13.0 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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 the provider profile at artifacts.apis.io/centeringlab-com/apis.yml: open an issue on github.com/api-evangelist/centeringlab-com to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 3

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

Model Context Protocol (MCP)

measured — observed by APIs.io (documented)

OAuth 2.0 Protected Resource Metadata

measured — observed by APIs.io (verified)

OpenAPI

measured — observed by APIs.io (published)

APIs 5

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

Centering Lab Grade API

The Grade API from Centering Lab — 1 operation(s) for grade.

Centering Lab Health API

The Health API from Centering Lab — 1 operation(s) for health.

Centering Lab Measure API

The Measure API from Centering Lab — 2 operation(s) for measure.

Centering Lab Openapi.json API

The Openapi.json API from Centering Lab — 1 operation(s) for openapi.json.

Centering Lab Standards API

The Standards API from Centering Lab — 1 operation(s) for standards.

MCP Servers 1

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

Centering Lab MCP Server

Remote MCP server at centeringlab.com.

MCP SERVER

Agent Skills 1

Packaged agent skills for driving this provider's APIs from an AI assistant.

card-centering

AGENT SKILL

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Centering Lab API Rules

46 rules · 44 errors 1 warnings 1 info

SPECTRAL

Security Posture 2

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

Centeringlab Com Authentication

http · 1 scheme

SECURITY

Centeringlab Com Domain Security

TLSv1.3 · HSTS · DNSSEC

SECURITY

Agentic Access 1

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

Centeringlab Com Agentic Access

6 operations · 3 acting

AGENTIC

Resources

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgentSkill

LLMsTxt

MCPServer

WellKnown

Design & Contract 3

Pagination, idempotency, versioning, errors, and events

Spectral

Spectral

ErrorCatalog

ErrorCatalog

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 1

The organization behind the API

Website

Website

Other 1

Properties that don't map to a standard resource type

Hosts

Hosts

Source (apis.yml)

aid: centeringlab-com
name: Centering Lab
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://centeringlab.com/assets/social/c15ae5bd931d405a.png
description: Centering Lab provides a free online card centering tool and app for collectors of Pokémon, One Piece, and sports
  cards. Users can check PSA, BGS, CGC, and SGC grades by uploading a photo directly from Android or iPhone browsers. The
  service requires no installation, no upload to a server, and operates entirely in the browser, offering a quick calculator
  and visual checker for card alignment and centering.
url: https://artifacts.apis.io/centeringlab-com/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-03 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-11-03'
modified: '2026-11-03'
tags:
- Cards
- Centering
- Collectors
- Web App
tags_raw:
- Card
- Centering
- Collector
- FreeTool
- WebApp
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/centeringlab-com-agentic-access.yml
- type: Spectral
  url: rules/centeringlab-com-rules.yml
- type: AgentSkill
  url: skills/_index.yml
- type: ErrorCatalog
  url: errors/centeringlab-com-problem-types.yml
- type: Conformance
  url: conformance/centeringlab-com-conformance.yml
- type: LLMsTxt
  url: llms/centeringlab-com-llms.txt
- type: MCPServer
  url: mcp/centeringlab-com-mcp.yml
- type: WellKnown
  url: well-known/centeringlab-com-well-known.yml
- type: Hosts
  url: hosts/centeringlab-com-hosts.yml
- type: TermsOfService
  url: https://centeringlab.com/terms/
- type: PrivacyPolicy
  url: https://centeringlab.com/privacy/
- type: Documentation
  url: https://centeringlab.com/guides/
- type: APIReference
  url: https://centeringlab.com/llms.txt
- type: Authentication
  url: authentication/centeringlab-com-authentication.yml
- type: DomainSecurity
  url: security/centeringlab-com-domain-security.yml
- type: Website
  url: https://centeringlab.com/
apis:
- aid: centeringlab-com:centeringlab-com-grade-api
  name: Centering Lab Grade API
  description: The Grade API from Centering Lab — 1 operation(s) for grade.
  humanURL: https://centeringlab.com/api/v1/docs
  baseURL: https://centeringlab.com
  tags:
  - Grade
  properties:
  - type: OpenAPI
    url: openapi/centeringlab-com-grade-api-openapi.yml
- aid: centeringlab-com:centeringlab-com-health-api
  name: Centering Lab Health API
  description: The Health API from Centering Lab — 1 operation(s) for health.
  humanURL: https://centeringlab.com/api/v1/docs
  baseURL: https://centeringlab.com
  tags:
  - Health
  properties:
  - type: OpenAPI
    url: openapi/centeringlab-com-health-api-openapi.yml
- aid: centeringlab-com:centeringlab-com-measure-api
  name: Centering Lab Measure API
  description: The Measure API from Centering Lab — 2 operation(s) for measure.
  humanURL: https://centeringlab.com/api/v1/docs
  baseURL: https://centeringlab.com
  tags:
  - Measure
  properties:
  - type: OpenAPI
    url: openapi/centeringlab-com-measure-api-openapi.yml
- aid: centeringlab-com:centeringlab-com-openapi-json-api
  name: Centering Lab Openapi.json API
  description: The Openapi.json API from Centering Lab — 1 operation(s) for openapi.json.
  humanURL: https://centeringlab.com/api/v1/docs
  baseURL: https://centeringlab.com
  tags:
  - Openapi.json
  properties:
  - type: OpenAPI
    url: openapi/centeringlab-com-openapi-json-api-openapi.yml
- aid: centeringlab-com:centeringlab-com-standards-api
  name: Centering Lab Standards API
  description: The Standards API from Centering Lab — 1 operation(s) for standards.
  humanURL: https://centeringlab.com/api/v1/docs
  baseURL: https://centeringlab.com
  tags:
  - Standards
  properties:
  - type: OpenAPI
    url: openapi/centeringlab-com-standards-api-openapi.yml
x-enrichment:
  date: '2026-11-03'
  status: enriched
  artifacts_added: 20
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Centering Lab API — frequently asked questions

Does Centering Lab have an API?

Yes. APIs.io lists 5 APIs from Centering Lab, including Centering Lab Grade API, Centering Lab Health API and Centering Lab Measure API, and 2 more.

Is there an OpenAPI specification for the Centering Lab API?

Yes. APIs.io indexes 5 OpenAPI specifications for Centering Lab, each linked for download from this page.

How do I authenticate with the Centering Lab API?

Centering Lab uses bearer-token authentication (http · 1 scheme). The details are profiled on APIs.io as Centeringlab Com Authentication.

Does Centering Lab have an MCP server?

Yes. APIs.io lists 1 MCP server for Centering Lab: Remote MCP server at centeringlab.com.

Is the Centering Lab API ready for AI agents?

Centering Lab has a Kin Score of 26.6 out of 100 (thin) and an Agent Readiness score of 38.2 (agent-ready), scored by API Evangelist on 2026-11-06.

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