Boostermage

Boostermage provides an independent price comparison service for Magic: The Gathering sealed products across UK retailers. It tracks booster boxes, packs, bundles, decks and other sealed releases, offering market information and price alerts. The site is not affiliated with Wizards of the Coast and aims to help collectors find the best deals.

Boostermage publishes 2 API contracts indexed on the APIs.io network, including API API, and 1 more. Tagged areas include Company, Price Comparison, Magic The Gathering, UK Retail, and Collectibles.

The Boostermage catalog on APIs.io includes 1 Spectral governance ruleset.

Boostermage’s developer surface includes privacy policy and 9 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

20.9/100 emerging Agent 31/100 agent ready Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 published contract 1 Agent Skills

Company Price ComparisonMagic The GatheringUK RetailCollectibles

Kin Score

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

Composite quality — 20.9/100 · emerging

Contract Quality 7.0 / 21

Developer Ergonomics 1.1 / 17

Access Clarity 1.8 / 17

Operational Transparency 0.0 / 11

Contract Governance 1.9 / 10

Discoverability 5.3 / 9

Regulatory Posture 3.1 / 15

Agent readiness — 31/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 4 / 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 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) 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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Agent readiness — checks not met, largest first (exact, from this profile):

Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
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)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link

8 more unmet checks in the Agent Readiness table above.

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

Developer Ergonomics scores 6.4 — up to +18.7 composite points
Access Clarity scores 10.5 — up to +17.9 composite points
Contract Quality scores 33.1 — up to +16.7 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/boostermage-com/apis.yml: open an issue on github.com/api-evangelist/boostermage-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 2

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)

OpenAPI

measured — observed by APIs.io (published)

APIs 2

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

Boostermage API

Public REST API for MTG sealed product pricing data across UK retailers.

Boostermage API API

Public REST API for MTG sealed product pricing data across UK retailers. Free and read-only. Listing links always point to Boostermage product pages; retailer and affiliate dest...

Agent Skills 1

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

search-products

AGENT SKILL

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Boostermage API Rules

32 rules · 30 errors 1 warnings 1 info

SPECTRAL

Security Posture 1

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

Boostermage Com Domain Security

TLSv1.3 · DNSSEC · DMARC

SECURITY

Resources

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgentSkill

AgentSkill

WellKnown

WellKnown

Design & Contract 2

Pagination, idempotency, versioning, errors, and events

Spectral

Spectral

Conformance

Conformance

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Commercial 1

Pricing, plans, and the legal terms of use

Privacy

Privacy

Company 2

The organization behind the API

Website

Website

About

About

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: boostermage-com
name: Boostermage
description: 'Boostermage provides an independent price comparison service for Magic: The Gathering sealed products across
  UK retailers. It tracks booster boxes, packs, bundles, decks and other sealed releases, offering market information and
  price alerts. The site is not affiliated with Wizards of the Coast and aims to help collectors find the best deals.'
url: https://artifacts.apis.io/boostermage-com/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-02 (modular-v1; was harvest)
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - security
  generated: '2026-11-06'
  method: derived
specificationVersion: '0.20'
created: '2026-11-02'
modified: '2026-11-02'
tags:
- Company
- Price Comparison
- Magic The Gathering
- UK Retail
- Collectibles
tags_raw:
- Company
- PriceComparison
- MagicTheGathering
- UKRetail
- Collectibles
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Spectral
  url: rules/boostermage-com-rules.yml
- type: Conformance
  url: conformance/boostermage-com-conformance.yml
- type: AgentSkill
  url: skills/_index.yml
- type: WellKnown
  url: well-known/boostermage-com-well-known.yml
- type: Hosts
  url: hosts/boostermage-com-hosts.yml
- type: Vendors
  url: vendors/boostermage-com-vendors.yml
- type: DomainSecurity
  url: security/boostermage-com-domain-security.yml
- type: Website
  url: https://boostermage.com/
- type: About
  url: https://boostermage.com/about/
- type: Privacy
  url: https://boostermage.com/privacy/
apis:
- name: Boostermage API
  description: Public REST API for MTG sealed product pricing data across UK retailers.
  humanURL: https://boostermage.com/
  baseURL: https://boostermage.com
  aid: boostermage-com:boostermage-api
- aid: boostermage-com:boostermage-api-api
  name: Boostermage API API
  description: 'Public REST API for MTG sealed product pricing data across UK retailers. Free and read-only. Listing links
    always point to Boostermage

    product pages; retailer and affiliate destination URLs are not exposed.'
  humanURL: https://boostermage.com/openapi.json
  baseURL: https://api.boostermage.com
  properties:
  - type: OpenAPI
    url: openapi/_original/boostermage-com-api-openapi.json
x-enrichment:
  date: '2026-11-02'
  status: enriched
  artifacts_added: 16
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Boostermage API — frequently asked questions

Does Boostermage have an API?

Yes. APIs.io lists 2 APIs from Boostermage, including Boostermage API and Boostermage API API.

Is there an OpenAPI specification for the Boostermage API?

Yes. APIs.io indexes 1 OpenAPI specification for Boostermage, each linked for download from this page.

Is the Boostermage API ready for AI agents?

Boostermage has a Kin Score of 20.9 out of 100 (emerging) and an Agent Readiness score of 30.5 (agent-ready), scored by API Evangelist on 2026-11-06.

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