Classic website screenshot

Classic

Classic (a.k.a. "OG") is the legacy ShapeShift crypto swap interface at classic.shapeshift.com, now redirecting to og.shapeshift.com. ShapeShift is a self-custody, multichain crypto platform and DEX aggregator. Its Public API (api.shapeshift.com) exposes supported assets and chains (identified with CAIP-19/CAIP-2), indicative swap rates and executable swap quotes, swap-status tracking, and an affiliate/partner program authenticated with Sign-In With Ethereum (EIP-4361, returning a JWT bearer token). Surfaced as a portfolio company of Pantera Capital and enriched into the API Evangelist network.

Classic publishes 5 APIs on the APIs.io network, including Affiliate API, Auth API, Supported Assets API, and 2 more. Tagged areas include Company, Crypto, Cryptocurrency, DEX Aggregator, and Swaps.

Classic’s developer surface includes documentation, API reference, engineering blog, support, authentication, and 19 more developer resources.

🌐 Visit website 📡 Source on GitHub
39.7/100 thin ▬ flat Agent 53/100 agent ready Full breakdown ↓
scored 2026-08-10 · rubric v0.9.1
AccessSelf serve
5 APIs 1 MCP Servers
CompanyCryptoCryptocurrencyDEX AggregatorSwapsBlockchainWalletSelf-Custody

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-10 · rubric v0.9.1
Composite quality — 39.7/100 · thin
Contract Quality 14.0 / 25
Developer Ergonomics 10.3 / 20
Commercial Clarity 4.2 / 20
Operational Transparency 0.7 / 13
Governance 1.4 / 12
Discoverability 9.3 / 10
Agent readiness — 53/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 0 / 10
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 4 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
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/classic: 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 5

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

Classic Affiliate API

The Affiliate API from Classic — 5 operation(s) for affiliate.

Classic Auth API

The Auth API from Classic — 2 operation(s) for auth.

Classic Supported Assets API

The Supported Assets API from Classic — 3 operation(s) for supported assets.

Classic Supported Chains API

The Supported Chains API from Classic — 2 operation(s) for supported chains.

Classic Swaps API

The Swaps API from Classic — 3 operation(s) for swaps.

MCP Servers 1

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

classic-mcp.yml

MCP SERVER

Security Posture 2

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

Classic Authentication

siwe/http-bearer-jwt · 3 schemes

SECURITY

Classic Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

DeveloperPortal
DeveloperPortal

Documentation 3

Reference material describing how the API behaves

Documentation
Documentation
 APIReference
APIReference
 OpenAPI
OpenAPI

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

WellKnown
WellKnown
 MCPServer
MCPServer
 LLMsTxt
LLMsTxt
 AgentSkill
AgentSkill

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conventions
Conventions
 ErrorCatalog
ErrorCatalog
 Conformance
Conformance
 Lifecycle
Lifecycle
 DataModel
DataModel

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization
 Packages
Packages
 SDKs
SDKs

Access & Security 2

Authentication, authorization, and security posture

Authentication
Authentication
 DomainSecurity
DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support
Support

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: classic
name: Classic
description: Classic (a.k.a. "OG") is the legacy ShapeShift crypto swap interface at classic.shapeshift.com, now redirecting
  to og.shapeshift.com. ShapeShift is a self-custody, multichain crypto platform and DEX aggregator. Its Public API (api.shapeshift.com)
  exposes supported assets and chains (identified with CAIP-19/CAIP-2), indicative swap rates and executable swap quotes,
  swap-status tracking, and an affiliate/partner program authenticated with Sign-In With Ethereum (EIP-4361, returning a JWT
  bearer token). Surfaced as a portfolio company of Pantera Capital and enriched into the API Evangelist network.
url: https://raw.githubusercontent.com/api-evangelist/classic/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- pantera-capital
x-tier: stub
x-tier-reason: portfolio-lead
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
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-18'
image: https://github.com/shapeshift.png
tags:
- Company
- Crypto
- Cryptocurrency
- DEX Aggregator
- Swaps
- Blockchain
- Wallet
- Self-Custody
apis:
- aid: classic:classic-affiliate-api
  name: Classic Affiliate API
  description: The Affiliate API from Classic — 5 operation(s) for affiliate.
  humanURL: https://api.shapeshift.com/docs
  baseURL: https://api.shapeshift.com
  tags:
  - Affiliate
  properties:
  - type: OpenAPI
    url: openapi/classic-affiliate-api-openapi.yml
  - type: APIReference
    url: https://api.shapeshift.com/docs
- aid: classic:classic-auth-api
  name: Classic Auth API
  description: The Auth API from Classic — 2 operation(s) for auth.
  humanURL: https://api.shapeshift.com/docs
  baseURL: https://api.shapeshift.com
  tags:
  - Auth
  properties:
  - type: OpenAPI
    url: openapi/classic-auth-api-openapi.yml
  - type: APIReference
    url: https://api.shapeshift.com/docs
- aid: classic:classic-supported-assets-api
  name: Classic Supported Assets API
  description: The Supported Assets API from Classic — 3 operation(s) for supported assets.
  humanURL: https://api.shapeshift.com/docs
  baseURL: https://api.shapeshift.com
  tags:
  - Supported Assets
  properties:
  - type: OpenAPI
    url: openapi/classic-supported-assets-api-openapi.yml
  - type: APIReference
    url: https://api.shapeshift.com/docs
- aid: classic:classic-supported-chains-api
  name: Classic Supported Chains API
  description: The Supported Chains API from Classic — 2 operation(s) for supported chains.
  humanURL: https://api.shapeshift.com/docs
  baseURL: https://api.shapeshift.com
  tags:
  - Supported Chains
  properties:
  - type: OpenAPI
    url: openapi/classic-supported-chains-api-openapi.yml
  - type: APIReference
    url: https://api.shapeshift.com/docs
- aid: classic:classic-swaps-api
  name: Classic Swaps API
  description: The Swaps API from Classic — 3 operation(s) for swaps.
  humanURL: https://api.shapeshift.com/docs
  baseURL: https://api.shapeshift.com
  tags:
  - Swaps
  properties:
  - type: OpenAPI
    url: openapi/classic-swaps-api-openapi.yml
  - type: APIReference
    url: https://api.shapeshift.com/docs
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://og.shapeshift.com/
- type: DeveloperPortal
  url: https://api.shapeshift.com/docs
- type: Documentation
  url: https://api.shapeshift.com/docs
- type: APIReference
  url: https://api.shapeshift.com/docs
- type: GitHubOrganization
  url: https://github.com/shapeshift
- type: Blog
  url: https://shapeshift.com/blog
- type: Support
  url: https://shapeshift.com/support
- type: TermsOfService
  url: https://shapeshift.com/terms-of-service
- type: PrivacyPolicy
  url: https://shapeshift.com/privacy-policy
- type: OpenAPI
  url: openapi/_original/classic-shapeshift-openapi-original.json
- type: Overlay
  url: overlays/classic-shapeshift-overlay.yaml
- type: Authentication
  url: authentication/classic-authentication.yml
- type: Conventions
  url: conventions/classic-conventions.yml
- type: ErrorCatalog
  url: errors/classic-problem-types.yml
- type: Conformance
  url: conformance/classic-conformance.yml
- type: Lifecycle
  url: lifecycle/classic-lifecycle.yml
- type: DataModel
  url: data-model/classic-data-model.yml
- type: DomainSecurity
  url: security/classic-domain-security.yml
- type: Packages
  url: packages/classic-packages.yml
- type: SDKs
  url: packages/classic-packages.yml
- type: WellKnown
  url: well-known/classic-well-known.yml
- type: MCPServer
  url: mcp/classic-mcp.yml
- type: LLMsTxt
  url: llms/classic-llms.txt
- type: AgentSkill
  url: skills/_index.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence