Alt

Alt (alt.xyz) is an alternative-asset platform for high-value graded trading cards, founded by Leore Avidar, who previously co-founded the address and print API company Lob. Alt lets collectors and investors research, value, buy, sell, vault, and borrow against slabbed cards in one place, spanning baseball, basketball, football, hockey, soccer, golf, tennis, racing and combat-sports cards as well as Pokemon and other trading-card games. The platform combines a fixed-price marketplace, timed and "Liquid" auctions, an Instant Pricer, market-trend and research views, a physical vault in Delaware that removes sales tax from transactions, and card-backed lending. Its pricing engine, Alt Value, is a machine-learning model tuned by card-pricing specialists that produces a real-time value for every BGS, PSA and SGC card vaulted with Alt, and that value underwrites every trade, loan and product on the platform. Alt raised a $75M Series B in November 2021 led by Spearhead with Seven Seven Six and a group of professional athletes. Alt publishes no public developer program: there is no developer portal, API reference, OpenAPI definition, SDK, CLI, sandbox or self-service API signup. Its programmatic surface is the private backend behind the alt.xyz web and mobile applications (a FastAPI/GraphQL platform service, with the engineering organisation on GitHub as github.com/onlyalt), which integrates payment, identity-verification, authentication, lending-servicing and shipping vendors but is neither documented nor offered to third parties.

Alt is profiled on the APIs.io network. Tagged areas include Company, Collectibles, Trading Cards, Sports Cards, and Alternative Assets.

Alt’s developer surface includes engineering blog, support, pricing, signup flow, and 12 more developer resources.

🌐 Visit website 📡 Source on GitHub

6.3/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-08-25 · rubric v0.14.0

0 APIs

Company Collectibles Trading CardsSports CardsAlternative Assets Marketplace AuctionsAsset ValuationMachine-Learning Lending Fintech E-Commerce

Kin Score

Kin Score How this is scored →
scored 2026-08-25 · rubric v0.14.0

Composite quality — 6.3/100 · minimal

Contract Quality 0.0 / 21

Developer Ergonomics 0.8 / 17

Access Clarity 2.9 / 17

Operational Transparency 0.3 / 11

Contract Governance 0.0 / 10

Discoverability 4.3 / 9

Regulatory Posture 1.4 / 15

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 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 0 / 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 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/alt: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Get Started 2

Portal, sign-up, and the first successful call

SignUp

SignUp

Login

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 6

The organization behind the API

Website

About

Blog

Careers

LinkedIn

Crunchbase

Crunchbase

Other 1

Properties that don't map to a standard resource type

SecondaryMarket

SecondaryMarket

Source (apis.yml)

aid: alt
name: Alt
description: 'Alt (alt.xyz) is an alternative-asset platform for high-value graded trading cards, founded by Leore Avidar,
  who previously co-founded the address and print API company Lob. Alt lets collectors and investors research, value, buy,
  sell, vault, and borrow against slabbed cards in one place, spanning baseball, basketball, football, hockey, soccer, golf,
  tennis, racing and combat-sports cards as well as Pokemon and other trading-card games. The platform combines a fixed-price
  marketplace, timed and "Liquid" auctions, an Instant Pricer, market-trend and research views, a physical vault in Delaware
  that removes sales tax from transactions, and card-backed lending. Its pricing engine, Alt Value, is a machine-learning
  model tuned by card-pricing specialists that produces a real-time value for every BGS, PSA and SGC card vaulted with Alt,
  and that value underwrites every trade, loan and product on the platform. Alt raised a $75M Series B in November 2021 led
  by Spearhead with Seven Seven Six and a group of professional athletes. Alt publishes no public developer program: there
  is no developer portal, API reference, OpenAPI definition, SDK, CLI, sandbox or self-service API signup. Its programmatic
  surface is the private backend behind the alt.xyz web and mobile applications (a FastAPI/GraphQL platform service, with
  the engineering organisation on GitHub as github.com/onlyalt), which integrates payment, identity-verification, authentication,
  lending-servicing and shipping vendors but is neither documented nor offered to third parties.'
url: https://raw.githubusercontent.com/api-evangelist/alt/refs/heads/main/apis.yml
image: https://alt.xyz/logo.svg
x-type: company
x-source: harvest:secondary-market
x-harvest-source-url: https://forgeglobal.com/alt_stock/
x-tier: profiled
x-tier-reason: enrichment-pass
specificationVersion: '0.23'
created: '2026-08-02'
modified: '2026-08-02'
tags:
- Company
- Collectibles
- Trading Cards
- Sports Cards
- Alternative Assets
- Marketplace
- Auctions
- Asset Valuation
- Machine-Learning
- Lending
- Fintech
- E-Commerce
tags_raw:
- Company
- Collectibles
- Trading Cards
- Sports Cards
- Alternative Assets
- Marketplace
- Auctions
- Asset Valuation
- Machine Learning
- Lending
- Fintech
- E-Commerce
apis: []
x-enrichment:
  date: '2026-08-02'
  status: enriched
  artifacts_added: 3
  pass: local-v1
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/alt-domain-security.yml
- type: Website
  url: https://alt.xyz/
- type: About
  url: https://alt.xyz/company
- type: Blog
  url: https://alt.xyz/blog
- type: Support
  url: https://support.alt.xyz/
- type: Pricing
  url: https://support.alt.xyz/en/articles/9682168-alt-fees
- type: SignUp
  url: https://alt.xyz/signup
- type: Login
  url: https://alt.xyz/login
- type: TermsOfService
  url: https://alt.xyz/terms
- type: PrivacyPolicy
  url: https://alt.xyz/privacy
- type: GitHubOrganization
  url: https://github.com/onlyalt
- type: Careers
  url: https://job-boards.greenhouse.io/alt
- type: LinkedIn
  url: https://www.linkedin.com/company/altxyzofficial
- type: Crunchbase
  url: https://www.crunchbase.com/organization/alt-xyz
- type: SecondaryMarket
  url: https://forgeglobal.com/alt_stock/
- type: LLMsTxt
  url: llms/alt-llms.txt

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