# Classic

**Canonical:** https://apis.io/providers/classic/  
**Website:** https://og.shapeshift.com/  
**APIs profiled:** 1

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.

## Kin Score — 37.0 / 100 (thin)

Scored 2026-08-30 under rubric 0.17.2. Trend: flat (-0.5 from 37.5).

| Facet | Score |
|---|---|
| Discoverability | 75.9 |
| Contract Quality | 49.8 |
| Governance | 4.5 |
| Contract Governance | 4.5 |
| Operational Transparency | 2.6 |
| Developer Ergonomics | 54.2 |
| Commercial Clarity | 21.1 |
| Access Clarity | 21.1 |

Regulatory layer — **Payments**: 39.1 (matched via tags).

## Agent readiness — 32.2 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | bearer |
| Idempotency | no |
| Error Semantics | verified |
| OpenAPI Examples | verified |
| Rate Limit Signal | verified |
| Event Surface Described | no |
| Agent Skills | derived |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## Access

Self-serve signup — onboarding: self-serve, pricing: unknown, trial: no (confidence: medium).

## APIs (5)

- **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)

- **Classic MCP Server**

## Security (2)

- **Classic Authentication** — siwe/http-bearer-jwt · 3 schemes
- **Classic Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC

## Tags

Company, Crypto, Cryptocurrency, DEX Aggregator, Swaps, Blockchain, Wallets, Self-Custody

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/classic/). Scores are computed from the provider's own public artifacts under a published rubric.